[Java][Jersey2] Fix typo and script, Log enhancements, HTTP signature, deserialization (#6476)

* Mustache template should use invokerPackage tag to generate import

* fix typo, fix script issue, add log statement for troubleshooting

* Add java jersey2 samples with OpenAPI doc that has HTTP signature security scheme

* Add sample for Java jersey2 and HTTP signature scheme

* Add unit test for oneOf schema deserialization

* Add unit test for oneOf schema deserialization

* Add log statements

* Add profile for jersey2

* Temporarily disable unit test

* Temporarily disable unit test

* fix typo in pom.xml

* fix duplicate jersey2 samples

* fix duplicate jersey2 samples

* fix duplicate artifact id

* fix duplicate jersey2 samples

* run samples scripts

samples/openapi3/client/petstore/java/jersey2-java8/src/main/AndroidManifest.xml

@@ -0,0 +1,3 @@
+<manifest package="org.openapitools.client" xmlns:android="http://schemas.android.com/apk/res/android">
+    <application />
+</manifest>

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/ApiException.java

@@ -0,0 +1,94 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client;
+
+import java.util.Map;
+import java.util.List;
+
+/**
+ * API Exception
+ */
+
+public class ApiException extends Exception {
+    private int code = 0;
+    private Map<String, List<String>> responseHeaders = null;
+    private String responseBody = null;
+
+    public ApiException() {}
+
+    public ApiException(Throwable throwable) {
+        super(throwable);
+    }
+
+    public ApiException(String message) {
+        super(message);
+    }
+
+    public ApiException(String message, Throwable throwable, int code, Map<String, List<String>> responseHeaders, String responseBody) {
+        super(message, throwable);
+        this.code = code;
+        this.responseHeaders = responseHeaders;
+        this.responseBody = responseBody;
+    }
+
+    public ApiException(String message, int code, Map<String, List<String>> responseHeaders, String responseBody) {
+        this(message, (Throwable) null, code, responseHeaders, responseBody);
+    }
+
+    public ApiException(String message, Throwable throwable, int code, Map<String, List<String>> responseHeaders) {
+        this(message, throwable, code, responseHeaders, null);
+    }
+
+    public ApiException(int code, Map<String, List<String>> responseHeaders, String responseBody) {
+        this((String) null, (Throwable) null, code, responseHeaders, responseBody);
+    }
+
+    public ApiException(int code, String message) {
+        super(message);
+        this.code = code;
+    }
+
+    public ApiException(int code, String message, Map<String, List<String>> responseHeaders, String responseBody) {
+        this(code, message);
+        this.responseHeaders = responseHeaders;
+        this.responseBody = responseBody;
+    }
+
+    /**
+     * Get the HTTP status code.
+     *
+     * @return HTTP status code
+     */
+    public int getCode() {
+        return code;
+    }
+
+    /**
+     * Get the HTTP response headers.
+     *
+     * @return A map of list of string
+     */
+    public Map<String, List<String>> getResponseHeaders() {
+        return responseHeaders;
+    }
+
+    /**
+     * Get the HTTP response body.
+     *
+     * @return Response body in the form of string
+     */
+    public String getResponseBody() {
+        return responseBody;
+    }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/ApiResponse.java

@@ -0,0 +1,74 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API response returned by API call.
+ *
+ * @param <T> The type of data that is deserialized from response body
+ */
+public class ApiResponse<T> {
+    private final int statusCode;
+    private final Map<String, List<String>> headers;
+    private final T data;
+
+    /**
+     * @param statusCode The status code of HTTP response
+     * @param headers The headers of HTTP response
+     */
+    public ApiResponse(int statusCode, Map<String, List<String>> headers) {
+        this(statusCode, headers, null);
+    }
+
+    /**
+     * @param statusCode The status code of HTTP response
+     * @param headers The headers of HTTP response
+     * @param data The object deserialized from response bod
+     */
+    public ApiResponse(int statusCode, Map<String, List<String>> headers, T data) {
+        this.statusCode = statusCode;
+        this.headers = headers;
+        this.data = data;
+    }
+
+    /**
+     * Get the status code
+     *
+     * @return status code
+     */
+    public int getStatusCode() {
+        return statusCode;
+    }
+
+    /**
+     * Get the headers
+     *
+     * @return map of headers
+     */
+    public Map<String, List<String>> getHeaders() {
+        return headers;
+    }
+
+    /**
+     * Get the data
+     *
+     * @return data
+     */
+    public T getData() {
+        return data;
+    }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/Configuration.java

@@ -0,0 +1,39 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client;
+
+
+public class Configuration {
+    private static ApiClient defaultApiClient = new ApiClient();
+
+    /**
+     * Get the default API client, which would be used when creating API
+     * instances without providing an API client.
+     *
+     * @return Default API client
+     */
+    public static ApiClient getDefaultApiClient() {
+        return defaultApiClient;
+    }
+
+    /**
+     * Set the default API client, which would be used when creating API
+     * instances without providing an API client.
+     *
+     * @param apiClient API client
+     */
+    public static void setDefaultApiClient(ApiClient apiClient) {
+        defaultApiClient = apiClient;
+    }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/JSON.java

@@ -0,0 +1,49 @@
+package org.openapitools.client;
+
+import com.fasterxml.jackson.annotation.*;
+import com.fasterxml.jackson.databind.*;
+import org.openapitools.jackson.nullable.JsonNullableModule;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+
+import java.text.DateFormat;
+
+import javax.ws.rs.ext.ContextResolver;
+
+
+public class JSON implements ContextResolver<ObjectMapper> {
+  private ObjectMapper mapper;
+
+  public JSON() {
+    mapper = new ObjectMapper();
+    mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+    mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true);
+    mapper.configure(DeserializationFeature.FAIL_ON_INVALID_SUBTYPE, true);
+    mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
+    mapper.enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING);
+    mapper.enable(DeserializationFeature.READ_ENUMS_USING_TO_STRING);
+    mapper.setDateFormat(new RFC3339DateFormat());
+    mapper.registerModule(new JavaTimeModule());
+    JsonNullableModule jnm = new JsonNullableModule();
+    mapper.registerModule(jnm);
+  }
+
+  /**
+   * Set the date format for JSON (de)serialization with Date properties.
+   * @param dateFormat Date format
+   */
+  public void setDateFormat(DateFormat dateFormat) {
+    mapper.setDateFormat(dateFormat);
+  }
+
+  @Override
+  public ObjectMapper getContext(Class<?> type) {
+    return mapper;
+  }
+
+  /**
+   * Get the object mapper
+   *
+   * @return object mapper
+   */
+  public ObjectMapper getMapper() { return mapper; }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/Pair.java

@@ -0,0 +1,61 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client;
+
+
+public class Pair {
+    private String name = "";
+    private String value = "";
+
+    public Pair (String name, String value) {
+        setName(name);
+        setValue(value);
+    }
+
+    private void setName(String name) {
+        if (!isValidString(name)) {
+            return;
+        }
+
+        this.name = name;
+    }
+
+    private void setValue(String value) {
+        if (!isValidString(value)) {
+            return;
+        }
+
+        this.value = value;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public String getValue() {
+        return this.value;
+    }
+
+    private boolean isValidString(String arg) {
+        if (arg == null) {
+            return false;
+        }
+
+        if (arg.trim().isEmpty()) {
+            return false;
+        }
+
+        return true;
+    }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/RFC3339DateFormat.java

@@ -0,0 +1,32 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+package org.openapitools.client;
+
+import com.fasterxml.jackson.databind.util.ISO8601DateFormat;
+import com.fasterxml.jackson.databind.util.ISO8601Utils;
+
+import java.text.FieldPosition;
+import java.util.Date;
+
+
+public class RFC3339DateFormat extends ISO8601DateFormat {
+
+  // Same as ISO8601DateFormat but serializing milliseconds.
+  @Override
+  public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition) {
+    String value = ISO8601Utils.format(date, true);
+    toAppendTo.append(value);
+    return toAppendTo;
+  }
+
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/ServerConfiguration.java

@@ -0,0 +1,58 @@
+package org.openapitools.client;
+
+import java.util.Map;
+
+/**
+ * Representing a Server configuration.
+ */
+public class ServerConfiguration {
+    public String URL;
+    public String description;
+    public Map<String, ServerVariable> variables;
+
+    /**
+     * @param URL A URL to the target host.
+     * @param description A describtion of the host designated by the URL.
+     * @param variables A map between a variable name and its value. The value is used for substitution in the server's URL template.
+     */
+    public ServerConfiguration(String URL, String description, Map<String, ServerVariable> variables) {
+        this.URL = URL;
+        this.description = description;
+        this.variables = variables;
+    }
+
+    /**
+     * Format URL template using given variables.
+     *
+     * @param variables A map between a variable name and its value.
+     * @return Formatted URL.
+     */
+    public String URL(Map<String, String> variables) {
+        String url = this.URL;
+
+        // go through variables and replace placeholders
+        for (Map.Entry<String, ServerVariable> variable: this.variables.entrySet()) {
+            String name = variable.getKey();
+            ServerVariable serverVariable = variable.getValue();
+            String value = serverVariable.defaultValue;
+
+            if (variables != null && variables.containsKey(name)) {
+                value = variables.get(name);
+                if (serverVariable.enumValues.size() > 0 && !serverVariable.enumValues.contains(value)) {
+                    throw new RuntimeException("The variable " + name + " in the server URL has invalid value " + value + ".");
+                }
+            }
+            url = url.replaceAll("\\{" + name + "\\}", value);
+        }
+        return url;
+    }
+
+    /**
+     * Format URL template using default server variables.
+     *
+     * @return Formatted URL.
+     */
+    public String URL() {
+        return URL(null);
+    }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/ServerVariable.java

@@ -0,0 +1,23 @@
+package org.openapitools.client;
+
+import java.util.HashSet;
+
+/**
+ * Representing a Server Variable for server URL template substitution.
+ */
+public class ServerVariable {
+    public String description;
+    public String defaultValue;
+    public HashSet<String> enumValues = null;
+
+    /**
+     * @param description A description for the server variable.
+     * @param defaultValue The default value to use for substitution.
+     * @param enumValues An enumeration of string values to be used if the substitution options are from a limited set.
+     */
+    public ServerVariable(String description, String defaultValue, HashSet<String> enumValues) {
+        this.description = description;
+        this.defaultValue = defaultValue;
+        this.enumValues = enumValues;
+    }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/StringUtil.java

@@ -0,0 +1,83 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client;
+
+import java.util.Collection;
+import java.util.Iterator;
+
+
+public class StringUtil {
+  /**
+   * Check if the given array contains the given value (with case-insensitive comparison).
+   *
+   * @param array The array
+   * @param value The value to search
+   * @return true if the array contains the value
+   */
+  public static boolean containsIgnoreCase(String[] array, String value) {
+    for (String str : array) {
+      if (value == null && str == null) {
+        return true;
+      }
+      if (value != null && value.equalsIgnoreCase(str)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * Join an array of strings with the given separator.
+   * <p>
+   * Note: This might be replaced by utility method from commons-lang or guava someday
+   * if one of those libraries is added as dependency.
+   * </p>
+   *
+   * @param array     The array of strings
+   * @param separator The separator
+   * @return the resulting string
+   */
+  public static String join(String[] array, String separator) {
+    int len = array.length;
+    if (len == 0) {
+      return "";
+    }
+
+    StringBuilder out = new StringBuilder();
+    out.append(array[0]);
+    for (int i = 1; i < len; i++) {
+      out.append(separator).append(array[i]);
+    }
+    return out.toString();
+  }
+
+  /**
+   * Join a list of strings with the given separator.
+   *
+   * @param list      The list of strings
+   * @param separator The separator
+   * @return the resulting string
+   */
+  public static String join(Collection<String> list, String separator) {
+    Iterator<String> iterator = list.iterator();
+    StringBuilder out = new StringBuilder();
+    if (iterator.hasNext()) {
+      out.append(iterator.next());
+    }
+    while (iterator.hasNext()) {
+      out.append(separator).append(iterator.next());
+    }
+    return out.toString();
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/api/AnotherFakeApi.java

@@ -0,0 +1,115 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.Pair;
+
+import javax.ws.rs.core.GenericType;
+
+import org.openapitools.client.model.Client;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+
+public class AnotherFakeApi {
+  private ApiClient apiClient;
+
+  public AnotherFakeApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public AnotherFakeApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Get the API cilent
+   *
+   * @return API client
+   */
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  /**
+   * Set the API cilent
+   *
+   * @param apiClient an instance of API client
+   */
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * To test special tags
+   * To test special tags and operation ID starting with number
+   * @param client client model (required)
+   * @return Client
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public Client call123testSpecialTags(Client client) throws ApiException {
+    return call123testSpecialTagsWithHttpInfo(client).getData();
+  }
+
+  /**
+   * To test special tags
+   * To test special tags and operation ID starting with number
+   * @param client client model (required)
+   * @return ApiResponse&lt;Client&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Client> call123testSpecialTagsWithHttpInfo(Client client) throws ApiException {
+    Object localVarPostBody = client;
+    
+    // verify the required parameter 'client' is set
+    if (client == null) {
+      throw new ApiException(400, "Missing the required parameter 'client' when calling call123testSpecialTags");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/another-fake/dummy";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<Client> localVarReturnType = new GenericType<Client>() {};
+
+    return apiClient.invokeAPI("AnotherFakeApi.call123testSpecialTags", localVarPath, "PATCH", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/api/DefaultApi.java

@@ -0,0 +1,108 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.Pair;
+
+import javax.ws.rs.core.GenericType;
+
+import org.openapitools.client.model.InlineResponseDefault;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+
+public class DefaultApi {
+  private ApiClient apiClient;
+
+  public DefaultApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public DefaultApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Get the API cilent
+   *
+   * @return API client
+   */
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  /**
+   * Set the API cilent
+   *
+   * @param apiClient an instance of API client
+   */
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * 
+   * 
+   * @return InlineResponseDefault
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 0 </td><td> response </td><td>  -  </td></tr>
+     </table>
+   */
+  public InlineResponseDefault fooGet() throws ApiException {
+    return fooGetWithHttpInfo().getData();
+  }
+
+  /**
+   * 
+   * 
+   * @return ApiResponse&lt;InlineResponseDefault&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 0 </td><td> response </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<InlineResponseDefault> fooGetWithHttpInfo() throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/foo";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<InlineResponseDefault> localVarReturnType = new GenericType<InlineResponseDefault>() {};
+
+    return apiClient.invokeAPI("DefaultApi.fooGet", localVarPath, "GET", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java

@@ -0,0 +1,115 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.Pair;
+
+import javax.ws.rs.core.GenericType;
+
+import org.openapitools.client.model.Client;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+
+public class FakeClassnameTags123Api {
+  private ApiClient apiClient;
+
+  public FakeClassnameTags123Api() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public FakeClassnameTags123Api(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Get the API cilent
+   *
+   * @return API client
+   */
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  /**
+   * Set the API cilent
+   *
+   * @param apiClient an instance of API client
+   */
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * To test class name in snake case
+   * To test class name in snake case
+   * @param client client model (required)
+   * @return Client
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public Client testClassname(Client client) throws ApiException {
+    return testClassnameWithHttpInfo(client).getData();
+  }
+
+  /**
+   * To test class name in snake case
+   * To test class name in snake case
+   * @param client client model (required)
+   * @return ApiResponse&lt;Client&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Client> testClassnameWithHttpInfo(Client client) throws ApiException {
+    Object localVarPostBody = client;
+    
+    // verify the required parameter 'client' is set
+    if (client == null) {
+      throw new ApiException(400, "Missing the required parameter 'client' when calling testClassname");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake_classname_test";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "api_key_query" };
+
+    GenericType<Client> localVarReturnType = new GenericType<Client>() {};
+
+    return apiClient.invokeAPI("FakeClassnameTags123Api.testClassname", localVarPath, "PATCH", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/api/PetApi.java

@@ -0,0 +1,697 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.Pair;
+
+import javax.ws.rs.core.GenericType;
+
+import java.io.File;
+import org.openapitools.client.model.ModelApiResponse;
+import org.openapitools.client.model.Pet;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+
+public class PetApi {
+  private ApiClient apiClient;
+
+  public PetApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public PetApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Get the API cilent
+   *
+   * @return API client
+   */
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  /**
+   * Set the API cilent
+   *
+   * @param apiClient an instance of API client
+   */
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Add a new pet to the store
+   * 
+   * @param pet Pet object that needs to be added to the store (required)
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 405 </td><td> Invalid input </td><td>  -  </td></tr>
+     </table>
+   */
+  public void addPet(Pet pet) throws ApiException {
+    addPetWithHttpInfo(pet);
+  }
+
+  /**
+   * Add a new pet to the store
+   * 
+   * @param pet Pet object that needs to be added to the store (required)
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 405 </td><td> Invalid input </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> addPetWithHttpInfo(Pet pet) throws ApiException {
+    Object localVarPostBody = pet;
+    
+    // verify the required parameter 'pet' is set
+    if (pet == null) {
+      throw new ApiException(400, "Missing the required parameter 'pet' when calling addPet");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json", "application/xml"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "http_signature_test", "petstore_auth" };
+
+    return apiClient.invokeAPI("PetApi.addPet", localVarPath, "POST", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+  /**
+   * Deletes a pet
+   * 
+   * @param petId Pet id to delete (required)
+   * @param apiKey  (optional)
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 400 </td><td> Invalid pet value </td><td>  -  </td></tr>
+     </table>
+   */
+  public void deletePet(Long petId, String apiKey) throws ApiException {
+    deletePetWithHttpInfo(petId, apiKey);
+  }
+
+  /**
+   * Deletes a pet
+   * 
+   * @param petId Pet id to delete (required)
+   * @param apiKey  (optional)
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 400 </td><td> Invalid pet value </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> deletePetWithHttpInfo(Long petId, String apiKey) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'petId' is set
+    if (petId == null) {
+      throw new ApiException(400, "Missing the required parameter 'petId' when calling deletePet");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/{petId}"
+      .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    if (apiKey != null)
+      localVarHeaderParams.put("api_key", apiClient.parameterToString(apiKey));
+
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+    return apiClient.invokeAPI("PetApi.deletePet", localVarPath, "DELETE", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+  /**
+   * Finds Pets by status
+   * Multiple status values can be provided with comma separated strings
+   * @param status Status values that need to be considered for filter (required)
+   * @return List&lt;Pet&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid status value </td><td>  -  </td></tr>
+     </table>
+   */
+  public List<Pet> findPetsByStatus(List<String> status) throws ApiException {
+    return findPetsByStatusWithHttpInfo(status).getData();
+  }
+
+  /**
+   * Finds Pets by status
+   * Multiple status values can be provided with comma separated strings
+   * @param status Status values that need to be considered for filter (required)
+   * @return ApiResponse&lt;List&lt;Pet&gt;&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid status value </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<List<Pet>> findPetsByStatusWithHttpInfo(List<String> status) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'status' is set
+    if (status == null) {
+      throw new ApiException(400, "Missing the required parameter 'status' when calling findPetsByStatus");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/findByStatus";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+    localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "status", status));
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "http_signature_test", "petstore_auth" };
+
+    GenericType<List<Pet>> localVarReturnType = new GenericType<List<Pet>>() {};
+
+    return apiClient.invokeAPI("PetApi.findPetsByStatus", localVarPath, "GET", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+  /**
+   * Finds Pets by tags
+   * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+   * @param tags Tags to filter by (required)
+   * @return List&lt;Pet&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid tag value </td><td>  -  </td></tr>
+     </table>
+   * @deprecated
+   */
+  @Deprecated
+  public List<Pet> findPetsByTags(List<String> tags) throws ApiException {
+    return findPetsByTagsWithHttpInfo(tags).getData();
+  }
+
+  /**
+   * Finds Pets by tags
+   * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+   * @param tags Tags to filter by (required)
+   * @return ApiResponse&lt;List&lt;Pet&gt;&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid tag value </td><td>  -  </td></tr>
+     </table>
+   * @deprecated
+   */
+  @Deprecated
+  public ApiResponse<List<Pet>> findPetsByTagsWithHttpInfo(List<String> tags) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'tags' is set
+    if (tags == null) {
+      throw new ApiException(400, "Missing the required parameter 'tags' when calling findPetsByTags");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/findByTags";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+    localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "tags", tags));
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "http_signature_test", "petstore_auth" };
+
+    GenericType<List<Pet>> localVarReturnType = new GenericType<List<Pet>>() {};
+
+    return apiClient.invokeAPI("PetApi.findPetsByTags", localVarPath, "GET", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+  /**
+   * Find pet by ID
+   * Returns a single pet
+   * @param petId ID of pet to return (required)
+   * @return Pet
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid ID supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> Pet not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public Pet getPetById(Long petId) throws ApiException {
+    return getPetByIdWithHttpInfo(petId).getData();
+  }
+
+  /**
+   * Find pet by ID
+   * Returns a single pet
+   * @param petId ID of pet to return (required)
+   * @return ApiResponse&lt;Pet&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid ID supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> Pet not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Pet> getPetByIdWithHttpInfo(Long petId) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'petId' is set
+    if (petId == null) {
+      throw new ApiException(400, "Missing the required parameter 'petId' when calling getPetById");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/{petId}"
+      .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "api_key" };
+
+    GenericType<Pet> localVarReturnType = new GenericType<Pet>() {};
+
+    return apiClient.invokeAPI("PetApi.getPetById", localVarPath, "GET", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+  /**
+   * Update an existing pet
+   * 
+   * @param pet Pet object that needs to be added to the store (required)
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 400 </td><td> Invalid ID supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> Pet not found </td><td>  -  </td></tr>
+       <tr><td> 405 </td><td> Validation exception </td><td>  -  </td></tr>
+     </table>
+   */
+  public void updatePet(Pet pet) throws ApiException {
+    updatePetWithHttpInfo(pet);
+  }
+
+  /**
+   * Update an existing pet
+   * 
+   * @param pet Pet object that needs to be added to the store (required)
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 400 </td><td> Invalid ID supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> Pet not found </td><td>  -  </td></tr>
+       <tr><td> 405 </td><td> Validation exception </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> updatePetWithHttpInfo(Pet pet) throws ApiException {
+    Object localVarPostBody = pet;
+    
+    // verify the required parameter 'pet' is set
+    if (pet == null) {
+      throw new ApiException(400, "Missing the required parameter 'pet' when calling updatePet");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json", "application/xml"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "http_signature_test", "petstore_auth" };
+
+    return apiClient.invokeAPI("PetApi.updatePet", localVarPath, "PUT", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+  /**
+   * Updates a pet in the store with form data
+   * 
+   * @param petId ID of pet that needs to be updated (required)
+   * @param name Updated name of the pet (optional)
+   * @param status Updated status of the pet (optional)
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 405 </td><td> Invalid input </td><td>  -  </td></tr>
+     </table>
+   */
+  public void updatePetWithForm(Long petId, String name, String status) throws ApiException {
+    updatePetWithFormWithHttpInfo(petId, name, status);
+  }
+
+  /**
+   * Updates a pet in the store with form data
+   * 
+   * @param petId ID of pet that needs to be updated (required)
+   * @param name Updated name of the pet (optional)
+   * @param status Updated status of the pet (optional)
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 405 </td><td> Invalid input </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> updatePetWithFormWithHttpInfo(Long petId, String name, String status) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'petId' is set
+    if (petId == null) {
+      throw new ApiException(400, "Missing the required parameter 'petId' when calling updatePetWithForm");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/{petId}"
+      .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    if (name != null)
+      localVarFormParams.put("name", name);
+if (status != null)
+      localVarFormParams.put("status", status);
+
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/x-www-form-urlencoded"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+    return apiClient.invokeAPI("PetApi.updatePetWithForm", localVarPath, "POST", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+  /**
+   * uploads an image
+   * 
+   * @param petId ID of pet to update (required)
+   * @param additionalMetadata Additional data to pass to server (optional)
+   * @param file file to upload (optional)
+   * @return ModelApiResponse
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ModelApiResponse uploadFile(Long petId, String additionalMetadata, File file) throws ApiException {
+    return uploadFileWithHttpInfo(petId, additionalMetadata, file).getData();
+  }
+
+  /**
+   * uploads an image
+   * 
+   * @param petId ID of pet to update (required)
+   * @param additionalMetadata Additional data to pass to server (optional)
+   * @param file file to upload (optional)
+   * @return ApiResponse&lt;ModelApiResponse&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<ModelApiResponse> uploadFileWithHttpInfo(Long petId, String additionalMetadata, File file) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'petId' is set
+    if (petId == null) {
+      throw new ApiException(400, "Missing the required parameter 'petId' when calling uploadFile");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/{petId}/uploadImage"
+      .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    if (additionalMetadata != null)
+      localVarFormParams.put("additionalMetadata", additionalMetadata);
+if (file != null)
+      localVarFormParams.put("file", file);
+
+    final String[] localVarAccepts = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "multipart/form-data"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+    GenericType<ModelApiResponse> localVarReturnType = new GenericType<ModelApiResponse>() {};
+
+    return apiClient.invokeAPI("PetApi.uploadFile", localVarPath, "POST", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+  /**
+   * uploads an image (required)
+   * 
+   * @param petId ID of pet to update (required)
+   * @param requiredFile file to upload (required)
+   * @param additionalMetadata Additional data to pass to server (optional)
+   * @return ModelApiResponse
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ModelApiResponse uploadFileWithRequiredFile(Long petId, File requiredFile, String additionalMetadata) throws ApiException {
+    return uploadFileWithRequiredFileWithHttpInfo(petId, requiredFile, additionalMetadata).getData();
+  }
+
+  /**
+   * uploads an image (required)
+   * 
+   * @param petId ID of pet to update (required)
+   * @param requiredFile file to upload (required)
+   * @param additionalMetadata Additional data to pass to server (optional)
+   * @return ApiResponse&lt;ModelApiResponse&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<ModelApiResponse> uploadFileWithRequiredFileWithHttpInfo(Long petId, File requiredFile, String additionalMetadata) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'petId' is set
+    if (petId == null) {
+      throw new ApiException(400, "Missing the required parameter 'petId' when calling uploadFileWithRequiredFile");
+    }
+    
+    // verify the required parameter 'requiredFile' is set
+    if (requiredFile == null) {
+      throw new ApiException(400, "Missing the required parameter 'requiredFile' when calling uploadFileWithRequiredFile");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake/{petId}/uploadImageWithRequiredFile"
+      .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    if (additionalMetadata != null)
+      localVarFormParams.put("additionalMetadata", additionalMetadata);
+if (requiredFile != null)
+      localVarFormParams.put("requiredFile", requiredFile);
+
+    final String[] localVarAccepts = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "multipart/form-data"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+    GenericType<ModelApiResponse> localVarReturnType = new GenericType<ModelApiResponse>() {};
+
+    return apiClient.invokeAPI("PetApi.uploadFileWithRequiredFile", localVarPath, "POST", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/api/StoreApi.java

@@ -0,0 +1,316 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.Pair;
+
+import javax.ws.rs.core.GenericType;
+
+import org.openapitools.client.model.Order;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+
+public class StoreApi {
+  private ApiClient apiClient;
+
+  public StoreApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public StoreApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Get the API cilent
+   *
+   * @return API client
+   */
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  /**
+   * Set the API cilent
+   *
+   * @param apiClient an instance of API client
+   */
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Delete purchase order by ID
+   * For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors
+   * @param orderId ID of the order that needs to be deleted (required)
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 400 </td><td> Invalid ID supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> Order not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public void deleteOrder(String orderId) throws ApiException {
+    deleteOrderWithHttpInfo(orderId);
+  }
+
+  /**
+   * Delete purchase order by ID
+   * For valid response try integer IDs with value &lt; 1000. Anything above 1000 or nonintegers will generate API errors
+   * @param orderId ID of the order that needs to be deleted (required)
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 400 </td><td> Invalid ID supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> Order not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> deleteOrderWithHttpInfo(String orderId) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'orderId' is set
+    if (orderId == null) {
+      throw new ApiException(400, "Missing the required parameter 'orderId' when calling deleteOrder");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/store/order/{order_id}"
+      .replaceAll("\\{" + "order_id" + "\\}", apiClient.escapeString(orderId.toString()));
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    return apiClient.invokeAPI("StoreApi.deleteOrder", localVarPath, "DELETE", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+  /**
+   * Returns pet inventories by status
+   * Returns a map of status codes to quantities
+   * @return Map&lt;String, Integer&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public Map<String, Integer> getInventory() throws ApiException {
+    return getInventoryWithHttpInfo().getData();
+  }
+
+  /**
+   * Returns pet inventories by status
+   * Returns a map of status codes to quantities
+   * @return ApiResponse&lt;Map&lt;String, Integer&gt;&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Map<String, Integer>> getInventoryWithHttpInfo() throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/store/inventory";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "api_key" };
+
+    GenericType<Map<String, Integer>> localVarReturnType = new GenericType<Map<String, Integer>>() {};
+
+    return apiClient.invokeAPI("StoreApi.getInventory", localVarPath, "GET", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+  /**
+   * Find purchase order by ID
+   * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generated exceptions
+   * @param orderId ID of pet that needs to be fetched (required)
+   * @return Order
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid ID supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> Order not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public Order getOrderById(Long orderId) throws ApiException {
+    return getOrderByIdWithHttpInfo(orderId).getData();
+  }
+
+  /**
+   * Find purchase order by ID
+   * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generated exceptions
+   * @param orderId ID of pet that needs to be fetched (required)
+   * @return ApiResponse&lt;Order&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid ID supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> Order not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Order> getOrderByIdWithHttpInfo(Long orderId) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'orderId' is set
+    if (orderId == null) {
+      throw new ApiException(400, "Missing the required parameter 'orderId' when calling getOrderById");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/store/order/{order_id}"
+      .replaceAll("\\{" + "order_id" + "\\}", apiClient.escapeString(orderId.toString()));
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<Order> localVarReturnType = new GenericType<Order>() {};
+
+    return apiClient.invokeAPI("StoreApi.getOrderById", localVarPath, "GET", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+  /**
+   * Place an order for a pet
+   * 
+   * @param order order placed for purchasing the pet (required)
+   * @return Order
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid Order </td><td>  -  </td></tr>
+     </table>
+   */
+  public Order placeOrder(Order order) throws ApiException {
+    return placeOrderWithHttpInfo(order).getData();
+  }
+
+  /**
+   * Place an order for a pet
+   * 
+   * @param order order placed for purchasing the pet (required)
+   * @return ApiResponse&lt;Order&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid Order </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Order> placeOrderWithHttpInfo(Order order) throws ApiException {
+    Object localVarPostBody = order;
+    
+    // verify the required parameter 'order' is set
+    if (order == null) {
+      throw new ApiException(400, "Missing the required parameter 'order' when calling placeOrder");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/store/order";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<Order> localVarReturnType = new GenericType<Order>() {};
+
+    return apiClient.invokeAPI("StoreApi.placeOrder", localVarPath, "POST", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/api/UserApi.java

@@ -0,0 +1,588 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.Pair;
+
+import javax.ws.rs.core.GenericType;
+
+import org.openapitools.client.model.User;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+
+public class UserApi {
+  private ApiClient apiClient;
+
+  public UserApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public UserApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Get the API cilent
+   *
+   * @return API client
+   */
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  /**
+   * Set the API cilent
+   *
+   * @param apiClient an instance of API client
+   */
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Create user
+   * This can only be done by the logged in user.
+   * @param user Created user object (required)
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 0 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public void createUser(User user) throws ApiException {
+    createUserWithHttpInfo(user);
+  }
+
+  /**
+   * Create user
+   * This can only be done by the logged in user.
+   * @param user Created user object (required)
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 0 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> createUserWithHttpInfo(User user) throws ApiException {
+    Object localVarPostBody = user;
+    
+    // verify the required parameter 'user' is set
+    if (user == null) {
+      throw new ApiException(400, "Missing the required parameter 'user' when calling createUser");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    return apiClient.invokeAPI("UserApi.createUser", localVarPath, "POST", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+  /**
+   * Creates list of users with given input array
+   * 
+   * @param user List of user object (required)
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 0 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public void createUsersWithArrayInput(List<User> user) throws ApiException {
+    createUsersWithArrayInputWithHttpInfo(user);
+  }
+
+  /**
+   * Creates list of users with given input array
+   * 
+   * @param user List of user object (required)
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 0 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> createUsersWithArrayInputWithHttpInfo(List<User> user) throws ApiException {
+    Object localVarPostBody = user;
+    
+    // verify the required parameter 'user' is set
+    if (user == null) {
+      throw new ApiException(400, "Missing the required parameter 'user' when calling createUsersWithArrayInput");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/createWithArray";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    return apiClient.invokeAPI("UserApi.createUsersWithArrayInput", localVarPath, "POST", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+  /**
+   * Creates list of users with given input array
+   * 
+   * @param user List of user object (required)
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 0 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public void createUsersWithListInput(List<User> user) throws ApiException {
+    createUsersWithListInputWithHttpInfo(user);
+  }
+
+  /**
+   * Creates list of users with given input array
+   * 
+   * @param user List of user object (required)
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 0 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> createUsersWithListInputWithHttpInfo(List<User> user) throws ApiException {
+    Object localVarPostBody = user;
+    
+    // verify the required parameter 'user' is set
+    if (user == null) {
+      throw new ApiException(400, "Missing the required parameter 'user' when calling createUsersWithListInput");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/createWithList";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    return apiClient.invokeAPI("UserApi.createUsersWithListInput", localVarPath, "POST", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+  /**
+   * Delete user
+   * This can only be done by the logged in user.
+   * @param username The name that needs to be deleted (required)
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 400 </td><td> Invalid username supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> User not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public void deleteUser(String username) throws ApiException {
+    deleteUserWithHttpInfo(username);
+  }
+
+  /**
+   * Delete user
+   * This can only be done by the logged in user.
+   * @param username The name that needs to be deleted (required)
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 400 </td><td> Invalid username supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> User not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> deleteUserWithHttpInfo(String username) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'username' is set
+    if (username == null) {
+      throw new ApiException(400, "Missing the required parameter 'username' when calling deleteUser");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/{username}"
+      .replaceAll("\\{" + "username" + "\\}", apiClient.escapeString(username.toString()));
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    return apiClient.invokeAPI("UserApi.deleteUser", localVarPath, "DELETE", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+  /**
+   * Get user by user name
+   * 
+   * @param username The name that needs to be fetched. Use user1 for testing. (required)
+   * @return User
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid username supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> User not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public User getUserByName(String username) throws ApiException {
+    return getUserByNameWithHttpInfo(username).getData();
+  }
+
+  /**
+   * Get user by user name
+   * 
+   * @param username The name that needs to be fetched. Use user1 for testing. (required)
+   * @return ApiResponse&lt;User&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  -  </td></tr>
+       <tr><td> 400 </td><td> Invalid username supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> User not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<User> getUserByNameWithHttpInfo(String username) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'username' is set
+    if (username == null) {
+      throw new ApiException(400, "Missing the required parameter 'username' when calling getUserByName");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/{username}"
+      .replaceAll("\\{" + "username" + "\\}", apiClient.escapeString(username.toString()));
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<User> localVarReturnType = new GenericType<User>() {};
+
+    return apiClient.invokeAPI("UserApi.getUserByName", localVarPath, "GET", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+  /**
+   * Logs user into the system
+   * 
+   * @param username The user name for login (required)
+   * @param password The password for login in clear text (required)
+   * @return String
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  * X-Rate-Limit - calls per hour allowed by the user <br>  * X-Expires-After - date in UTC when token expires <br>  </td></tr>
+       <tr><td> 400 </td><td> Invalid username/password supplied </td><td>  -  </td></tr>
+     </table>
+   */
+  public String loginUser(String username, String password) throws ApiException {
+    return loginUserWithHttpInfo(username, password).getData();
+  }
+
+  /**
+   * Logs user into the system
+   * 
+   * @param username The user name for login (required)
+   * @param password The password for login in clear text (required)
+   * @return ApiResponse&lt;String&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 200 </td><td> successful operation </td><td>  * X-Rate-Limit - calls per hour allowed by the user <br>  * X-Expires-After - date in UTC when token expires <br>  </td></tr>
+       <tr><td> 400 </td><td> Invalid username/password supplied </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<String> loginUserWithHttpInfo(String username, String password) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'username' is set
+    if (username == null) {
+      throw new ApiException(400, "Missing the required parameter 'username' when calling loginUser");
+    }
+    
+    // verify the required parameter 'password' is set
+    if (password == null) {
+      throw new ApiException(400, "Missing the required parameter 'password' when calling loginUser");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/login";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+    localVarQueryParams.addAll(apiClient.parameterToPairs("", "username", username));
+    localVarQueryParams.addAll(apiClient.parameterToPairs("", "password", password));
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<String> localVarReturnType = new GenericType<String>() {};
+
+    return apiClient.invokeAPI("UserApi.loginUser", localVarPath, "GET", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, localVarReturnType, null);
+  }
+  /**
+   * Logs out current logged in user session
+   * 
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 0 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public void logoutUser() throws ApiException {
+    logoutUserWithHttpInfo();
+  }
+
+  /**
+   * Logs out current logged in user session
+   * 
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 0 </td><td> successful operation </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> logoutUserWithHttpInfo() throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/user/logout";
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    return apiClient.invokeAPI("UserApi.logoutUser", localVarPath, "GET", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+  /**
+   * Updated user
+   * This can only be done by the logged in user.
+   * @param username name that need to be deleted (required)
+   * @param user Updated user object (required)
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 400 </td><td> Invalid user supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> User not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public void updateUser(String username, User user) throws ApiException {
+    updateUserWithHttpInfo(username, user);
+  }
+
+  /**
+   * Updated user
+   * This can only be done by the logged in user.
+   * @param username name that need to be deleted (required)
+   * @param user Updated user object (required)
+   * @return ApiResponse&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   * @http.response.details
+     <table summary="Response Details" border="1">
+       <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+       <tr><td> 400 </td><td> Invalid user supplied </td><td>  -  </td></tr>
+       <tr><td> 404 </td><td> User not found </td><td>  -  </td></tr>
+     </table>
+   */
+  public ApiResponse<Void> updateUserWithHttpInfo(String username, User user) throws ApiException {
+    Object localVarPostBody = user;
+    
+    // verify the required parameter 'username' is set
+    if (username == null) {
+      throw new ApiException(400, "Missing the required parameter 'username' when calling updateUser");
+    }
+    
+    // verify the required parameter 'user' is set
+    if (user == null) {
+      throw new ApiException(400, "Missing the required parameter 'user' when calling updateUser");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/{username}"
+      .replaceAll("\\{" + "username" + "\\}", apiClient.escapeString(username.toString()));
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    return apiClient.invokeAPI("UserApi.updateUser", localVarPath, "PUT", localVarQueryParams, localVarPostBody,
+                               localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType,
+                               localVarAuthNames, null, null);
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/ApiKeyAuth.java

@@ -0,0 +1,79 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.auth;
+
+import org.openapitools.client.Pair;
+import org.openapitools.client.ApiException;
+
+import java.net.URI;
+import java.util.Map;
+import java.util.List;
+
+
+public class ApiKeyAuth implements Authentication {
+  private final String location;
+  private final String paramName;
+
+  private String apiKey;
+  private String apiKeyPrefix;
+
+  public ApiKeyAuth(String location, String paramName) {
+    this.location = location;
+    this.paramName = paramName;
+  }
+
+  public String getLocation() {
+    return location;
+  }
+
+  public String getParamName() {
+    return paramName;
+  }
+
+  public String getApiKey() {
+    return apiKey;
+  }
+
+  public void setApiKey(String apiKey) {
+    this.apiKey = apiKey;
+  }
+
+  public String getApiKeyPrefix() {
+    return apiKeyPrefix;
+  }
+
+  public void setApiKeyPrefix(String apiKeyPrefix) {
+    this.apiKeyPrefix = apiKeyPrefix;
+  }
+
+  @Override
+  public void applyToParams(List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams, String payload, String method, URI uri) throws ApiException {
+    if (apiKey == null) {
+      return;
+    }
+    String value;
+    if (apiKeyPrefix != null) {
+      value = apiKeyPrefix + " " + apiKey;
+    } else {
+      value = apiKey;
+    }
+    if ("query".equals(location)) {
+      queryParams.add(new Pair(paramName, value));
+    } else if ("header".equals(location)) {
+      headerParams.put(paramName, value);
+    } else if ("cookie".equals(location)) {
+      cookieParams.put(paramName, value);
+    }
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/Authentication.java

@@ -0,0 +1,33 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.auth;
+
+import org.openapitools.client.Pair;
+import org.openapitools.client.ApiException;
+
+import java.net.URI;
+import java.util.Map;
+import java.util.List;
+
+public interface Authentication {
+    /**
+     * Apply authentication settings to header and query params.
+     *
+     * @param queryParams List of query parameters
+     * @param headerParams Map of header parameters
+     * @param cookieParams Map of cookie parameters
+     */
+    void applyToParams(List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams, String payload, String method, URI uri) throws ApiException;
+
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/HttpBasicAuth.java

@@ -0,0 +1,56 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.auth;
+
+import org.openapitools.client.Pair;
+import org.openapitools.client.ApiException;
+
+import java.util.Base64;
+import java.nio.charset.StandardCharsets;
+
+import java.net.URI;
+import java.util.Map;
+import java.util.List;
+
+
+
+public class HttpBasicAuth implements Authentication {
+  private String username;
+  private String password;
+
+  public String getUsername() {
+    return username;
+  }
+
+  public void setUsername(String username) {
+    this.username = username;
+  }
+
+  public String getPassword() {
+    return password;
+  }
+
+  public void setPassword(String password) {
+    this.password = password;
+  }
+
+  @Override
+  public void applyToParams(List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams, String payload, String method, URI uri) throws ApiException {
+    if (username == null && password == null) {
+      return;
+    }
+    String str = (username == null ? "" : username) + ":" + (password == null ? "" : password);
+    headerParams.put("Authorization", "Basic " + Base64.getEncoder().encodeToString(str.getBytes(StandardCharsets.UTF_8)));
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java

@@ -0,0 +1,62 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.auth;
+
+import org.openapitools.client.Pair;
+import org.openapitools.client.ApiException;
+
+import java.net.URI;
+import java.util.Map;
+import java.util.List;
+
+
+public class HttpBearerAuth implements Authentication {
+  private final String scheme;
+  private String bearerToken;
+
+  public HttpBearerAuth(String scheme) {
+    this.scheme = scheme;
+  }
+
+  /**
+   * Gets the token, which together with the scheme, will be sent as the value of the Authorization header.
+   *
+   * @return The bearer token
+   */
+  public String getBearerToken() {
+    return bearerToken;
+  }
+
+  /**
+   * Sets the token, which together with the scheme, will be sent as the value of the Authorization header.
+   *
+   * @param bearerToken The bearer token to send in the Authorization header
+   */
+  public void setBearerToken(String bearerToken) {
+    this.bearerToken = bearerToken;
+  }
+
+  @Override
+  public void applyToParams(List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams, String payload, String method, URI uri) throws ApiException {
+    if(bearerToken == null) {
+      return;
+    }
+
+    headerParams.put("Authorization", (scheme != null ? upperCaseBearer(scheme) + " " : "") + bearerToken);
+  }
+
+  private static String upperCaseBearer(String scheme) {
+    return ("bearer".equalsIgnoreCase(scheme)) ? "Bearer" : scheme;
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/HttpSignatureAuth.java

@@ -0,0 +1,265 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+  
+package org.openapitools.client.auth;
+
+import org.openapitools.client.Pair;
+import org.openapitools.client.ApiException;
+
+import java.net.URI;
+import java.net.URLEncoder;
+import java.security.MessageDigest;
+import java.security.Key;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.Date;
+import java.util.Locale;
+import java.util.Map;
+import java.util.List;
+import java.security.spec.AlgorithmParameterSpec;
+import java.security.InvalidKeyException;
+
+import org.tomitribe.auth.signatures.Algorithm;
+import org.tomitribe.auth.signatures.Signer;
+import org.tomitribe.auth.signatures.Signature;
+import org.tomitribe.auth.signatures.SigningAlgorithm;
+
+/**
+ * A Configuration object for the HTTP message signature security scheme.
+ */
+public class HttpSignatureAuth implements Authentication {
+
+  private Signer signer;
+
+  // An opaque string that the server can use to look up the component they need to validate the signature.
+  private String keyId;
+
+  // The HTTP signature algorithm.
+  private SigningAlgorithm signingAlgorithm;
+
+  // The HTTP cryptographic algorithm.
+  private Algorithm algorithm;
+
+  // The cryptographic parameters.
+  private AlgorithmParameterSpec parameterSpec;
+
+  // The list of HTTP headers that should be included in the HTTP signature.
+  private List<String> headers;
+
+  // The digest algorithm which is used to calculate a cryptographic digest of the HTTP request body.
+  private String digestAlgorithm;
+
+  /**
+   * Construct a new HTTP signature auth configuration object.
+   *
+   * @param keyId An opaque string that the server can use to look up the component they need to validate the signature.
+   * @param signingAlgorithm The signature algorithm.
+   * @param algorithm The cryptographic algorithm.
+   * @param digestAlgorithm The digest algorithm.
+   * @param headers The list of HTTP headers that should be included in the HTTP signature.
+   */
+  public HttpSignatureAuth(String keyId,
+                           SigningAlgorithm signingAlgorithm,
+                           Algorithm algorithm,
+                           String digestAlgorithm,
+                           AlgorithmParameterSpec parameterSpec,
+                           List<String> headers) {
+    this.keyId = keyId;
+    this.signingAlgorithm = signingAlgorithm;
+    this.algorithm = algorithm;
+    this.parameterSpec = parameterSpec;
+    this.digestAlgorithm = digestAlgorithm;
+    this.headers = headers;
+  }
+
+  /**
+   * Returns the opaque string that the server can use to look up the component they need to validate the signature.
+   *
+   * @return The keyId.
+   */
+  public String getKeyId() {
+    return keyId;
+  }
+
+  /**
+   * Set the HTTP signature key id.
+   *
+   * @param keyId An opaque string that the server can use to look up the component they need to validate the signature.
+   */
+  public void setKeyId(String keyId) {
+    this.keyId = keyId;
+  }
+
+  /**
+   * Returns the HTTP signature algorithm which is used to sign HTTP requests.
+   */
+  public SigningAlgorithm getSigningAlgorithm() {
+    return signingAlgorithm;
+  }
+
+  /**
+   * Sets the HTTP signature algorithm which is used to sign HTTP requests.
+   *
+   * @param signingAlgorithm The HTTP signature algorithm.
+   */
+  public void setSigningAlgorithm(SigningAlgorithm signingAlgorithm) {
+    this.signingAlgorithm = signingAlgorithm;
+  }
+
+  /**
+   * Returns the HTTP cryptographic algorithm which is used to sign HTTP requests.
+   */
+  public Algorithm getAlgorithm() {
+    return algorithm;
+  }
+
+  /**
+   * Sets the HTTP cryptographic algorithm which is used to sign HTTP requests.
+   *
+   * @param algorithm The HTTP signature algorithm.
+   */
+  public void setAlgorithm(Algorithm algorithm) {
+    this.algorithm = algorithm;
+  }
+
+  /**
+   * Returns the cryptographic parameters which are used to sign HTTP requests.
+   */
+  public AlgorithmParameterSpec getAlgorithmParameterSpec() {
+    return parameterSpec;
+  }
+
+  /**
+   * Sets the cryptographic parameters which are used to sign HTTP requests.
+   *
+   * @param parameterSpec The cryptographic parameters.
+   */
+  public void setAlgorithmParameterSpec(AlgorithmParameterSpec parameterSpec) {
+    this.parameterSpec = parameterSpec;
+  }
+
+  /**
+   * Returns the digest algorithm which is used to calculate a cryptographic digest of the HTTP request body.
+   *
+   * @see java.security.MessageDigest
+   */
+  public String getDigestAlgorithm() {
+    return digestAlgorithm;
+  }
+
+  /**
+   * Sets the digest algorithm which is used to calculate a cryptographic digest of the HTTP request body.
+   *
+   * The exact list of supported digest algorithms depends on the installed security providers.
+   * Every implementation of the Java platform is required to support "MD5", "SHA-1" and "SHA-256".
+   * Do not use "MD5" and "SHA-1", they are vulnerable to multiple known attacks.
+   * By default, "SHA-256" is used.
+   *
+   * @param digestAlgorithm The digest algorithm.
+   *
+   * @see java.security.MessageDigest
+   */
+  public void setDigestAlgorithm(String digestAlgorithm) {
+    this.digestAlgorithm = digestAlgorithm;
+  }
+
+  /**
+   * Returns the list of HTTP headers that should be included in the HTTP signature.
+   */
+  public List<String> getHeaders() {
+    return headers;
+  }
+
+  /**
+   * Sets the list of HTTP headers that should be included in the HTTP signature.
+   *
+   * @param headers The HTTP headers.
+   */
+  public void setHeaders(List<String> headers) {
+    this.headers = headers;
+  }
+
+  /**
+   * Returns the signer instance used to sign HTTP messages.
+   *
+   * @return the signer instance.
+   */
+  public Signer getSigner() {
+    return signer;
+  }
+
+  /**
+   * Sets the signer instance used to sign HTTP messages.
+   *
+   * @param signer The signer instance to set.
+   */
+  public void setSigner(Signer signer) {
+    this.signer = signer;
+  }
+
+  /**
+   * Set the private key used to sign HTTP requests using the HTTP signature scheme.
+   *
+   * @param key The private key.
+   *
+   * @throws InvalidKeyException Unable to parse the key, or the security provider for this key
+   * is not installed.
+   */
+  public void setPrivateKey(Key key) throws InvalidKeyException, ApiException {
+    if (key == null) {
+      throw new ApiException("Private key (java.security.Key) cannot be null");
+    }
+    signer = new Signer(key, new Signature(keyId, signingAlgorithm, algorithm, parameterSpec, null, headers));
+  }
+
+  @Override
+  public void applyToParams(List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams,
+                            String payload, String method, URI uri) throws ApiException {
+    try {
+      if (headers.contains("host")) {
+        headerParams.put("host", uri.getHost());
+      }
+
+      if (headers.contains("date")) {
+        headerParams.put("date", new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US).format(new Date()));
+      }
+
+      if (headers.contains("digest")) {
+        headerParams.put("digest",
+          this.digestAlgorithm + "=" +
+            new String(Base64.getEncoder().encode(MessageDigest.getInstance(this.digestAlgorithm).digest(payload.getBytes()))));
+      }
+
+      if (signer == null) {
+        throw new ApiException("Signer cannot be null. Please call the method `setPrivateKey` to set it up correctly");
+      }
+
+      // construct the path with the URL query string
+      String path = uri.getPath();
+
+      List<String> urlQueries = new ArrayList<String>();
+      for (Pair queryParam : queryParams) {
+        urlQueries.add(queryParam.getName() + "=" + URLEncoder.encode(queryParam.getValue(), "utf8").replaceAll("\\+", "%20"));
+      }
+
+      if (!urlQueries.isEmpty()) {
+        path = path + "?" + String.join("&", urlQueries);
+      }
+
+      headerParams.put("Authorization", signer.sign(method, path, headerParams).toString());
+    } catch (Exception ex) {
+      throw new ApiException("Failed to create signature in the HTTP request header: " + ex.toString());
+    }
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuth.java

@@ -0,0 +1,183 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.auth;
+
+import org.openapitools.client.Pair;
+import org.openapitools.client.ApiException;
+import com.github.scribejava.core.builder.ServiceBuilder;
+import com.github.scribejava.core.builder.api.DefaultApi20;
+import com.github.scribejava.core.exceptions.OAuthException;
+import com.github.scribejava.core.model.OAuth2AccessToken;
+import com.github.scribejava.core.oauth.OAuth20Service;
+
+import javax.ws.rs.core.UriBuilder;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ExecutionException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+
+public class OAuth implements Authentication {
+  private static final Logger log = Logger.getLogger(OAuth.class.getName());
+
+  private String tokenUrl;
+  private String absoluteTokenUrl;
+  private OAuthFlow flow = OAuthFlow.application;
+  private OAuth20Service service;
+  private DefaultApi20 authApi;
+  private String scope;
+  private String username;
+  private String password;
+  private String code;
+  private volatile OAuth2AccessToken accessToken;
+
+  public OAuth(String basePath, String tokenUrl) {
+    this.tokenUrl = tokenUrl;
+    this.absoluteTokenUrl = createAbsoluteTokenUrl(basePath, tokenUrl);
+    authApi = new DefaultApi20() {
+      @Override
+      public String getAccessTokenEndpoint() {
+        return absoluteTokenUrl;
+      }
+
+      @Override
+      protected String getAuthorizationBaseUrl() {
+        throw new UnsupportedOperationException("Shouldn't get there !");
+      }
+    };
+  }
+
+  private static String createAbsoluteTokenUrl(String basePath, String tokenUrl) {
+    if (!URI.create(tokenUrl).isAbsolute()) {
+      try {
+        return UriBuilder.fromPath(basePath).path(tokenUrl).build().toURL().toString();
+      } catch (MalformedURLException e) {
+        log.log(Level.SEVERE, "Couldn't create absolute token URL", e);
+      }
+    }
+    return tokenUrl;
+  }
+
+  @Override
+  public void applyToParams(
+      List<Pair> queryParams,
+      Map<String, String> headerParams,
+      Map<String, String> cookieParams,
+      String payload,
+      String method,
+      URI uri)
+      throws ApiException {
+
+    if (accessToken == null) {
+      obtainAccessToken(null);
+    }
+    if (accessToken != null) {
+      headerParams.put("Authorization", "Bearer " + accessToken.getAccessToken());
+    }
+  }
+
+  public OAuth2AccessToken renewAccessToken() throws ApiException {
+    String refreshToken = null;
+    if (accessToken != null) {
+      refreshToken = accessToken.getRefreshToken();
+      accessToken = null;
+    }
+    return obtainAccessToken(refreshToken);
+  }
+
+  public synchronized OAuth2AccessToken obtainAccessToken(String refreshToken) throws ApiException {
+    if (service == null) {
+      return null;
+    }
+    try {
+      if (refreshToken != null) {
+        return service.refreshAccessToken(refreshToken);
+      }
+    } catch (OAuthException | InterruptedException | ExecutionException | IOException e) {
+      log.log(Level.FINE, "Refreshing the access token using the refresh token failed", e);
+    }
+    try {
+      switch (flow) {
+        case password:
+          if (username != null && password != null) {
+            accessToken = service.getAccessTokenPasswordGrant(username, password, scope);
+          }
+          break;
+        case accessCode:
+          if (code != null) {
+            accessToken = service.getAccessToken(code);
+            code = null;
+          }
+          break;
+        case application:
+          accessToken = service.getAccessTokenClientCredentialsGrant(scope);
+      }
+    } catch (OAuthException | InterruptedException | ExecutionException | IOException e) {
+      throw new ApiException(e);
+    }
+    return accessToken;
+  }
+
+  public OAuth2AccessToken getAccessToken() {
+    return accessToken;
+  }
+
+  public OAuth setAccessToken(OAuth2AccessToken accessToken) {
+    this.accessToken = accessToken;
+    return this;
+  }
+
+  public OAuth setAccessToken(String accessToken) {
+    this.accessToken = new OAuth2AccessToken(accessToken);
+    return this;
+  }
+
+  public OAuth setScope(String scope) {
+    this.scope = scope;
+    return this;
+  }
+
+  public OAuth setCredentials(String clientId, String clientSecret) {
+    service = new ServiceBuilder(clientId)
+        .apiSecret(clientSecret)
+        .build(authApi);
+    return this;
+  }
+
+  public OAuth usePasswordFlow(String username, String password) {
+    this.flow = OAuthFlow.password;
+    this.username = username;
+    this.password = password;
+    return this;
+  }
+
+  public OAuth useAuthorizationCodeFlow(String code) {
+    this.flow = OAuthFlow.accessCode;
+    this.code = code;
+    return this;
+  }
+
+  public OAuth setFlow(OAuthFlow flow) {
+    this.flow = flow;
+    return this;
+  }
+
+  public void setBasePath(String basePath) {
+    this.absoluteTokenUrl = createAbsoluteTokenUrl(basePath, tokenUrl);
+  }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuthFlow.java

@@ -0,0 +1,18 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.auth;
+
+public enum OAuthFlow {
+    accessCode, implicit, password, application
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/AbstractOpenApiSchema.java

@@ -0,0 +1,127 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import org.openapitools.client.ApiException;
+import java.util.Objects;
+import java.lang.reflect.Type;
+import java.util.Map;
+import javax.ws.rs.core.GenericType;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Abstract class for oneOf,anyOf schemas defined in OpenAPI spec
+ */
+
+public abstract class AbstractOpenApiSchema {
+
+    // store the actual instance of the schema/object
+    private Object instance;
+
+    // is nullable
+    private Boolean isNullable;
+
+    // schema type (e.g. oneOf, anyOf)
+    private final String schemaType;
+
+    public AbstractOpenApiSchema(String schemaType, Boolean isNullable) {
+        this.schemaType = schemaType;
+        this.isNullable = isNullable;
+    }
+
+    /***
+     * Get the list of schemas allowed to be stored in this object
+     *
+     * @return an instance of the actual schema/object
+     */
+    public abstract Map<String, GenericType> getSchemas();
+
+    /***
+     * Get the actual instance
+     *
+     * @return an instance of the actual schema/object
+     */
+    @JsonValue
+    public Object getActualInstance() {return instance;}
+
+    /***
+     * Set the actual instance
+     *
+     * @param instance the actual instance of the schema/object
+     */
+    public void setActualInstance(Object instance) {this.instance = instance;}
+
+    /***
+     * Get the schema type (e.g. anyOf, oneOf)
+     *
+     * @return the schema type
+     */
+    public String getSchemaType() {
+        return schemaType;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("class ").append(getClass()).append(" {\n");
+        sb.append("    instance: ").append(toIndentedString(instance)).append("\n");
+        sb.append("    isNullable: ").append(toIndentedString(isNullable)).append("\n");
+        sb.append("    schemaType: ").append(toIndentedString(schemaType)).append("\n");
+        sb.append("}");
+        return sb.toString();
+    }
+
+    /**
+     * Convert the given object to string with each line indented by 4 spaces
+     * (except the first line).
+     */
+    private String toIndentedString(java.lang.Object o) {
+        if (o == null) {
+            return "null";
+        }
+        return o.toString().replace("\n", "\n    ");
+    }
+
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        AbstractOpenApiSchema a = (AbstractOpenApiSchema) o;
+        return Objects.equals(this.instance, a.instance) &&
+            Objects.equals(this.isNullable, a.isNullable) &&
+            Objects.equals(this.schemaType, a.schemaType);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(instance, isNullable, schemaType);
+    }
+
+    /***
+     * Is nullalble
+     *
+     * @return true if it's nullable
+     */
+    public Boolean isNullable() {
+        if (Boolean.TRUE.equals(isNullable)) {
+            return Boolean.TRUE;
+        } else {
+            return Boolean.FALSE;
+        }
+    }
+}

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java

@@ -0,0 +1,367 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.util.NoSuchElementException;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * AdditionalPropertiesClass
+ */
+@JsonPropertyOrder({
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_PROPERTY,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_OF_MAP_PROPERTY,
+  AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE1,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_ANYTYPE1,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_ANYTYPE2,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_ANYTYPE3,
+  AdditionalPropertiesClass.JSON_PROPERTY_EMPTY_MAP,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_STRING
+})
+
+public class AdditionalPropertiesClass {
+  public static final String JSON_PROPERTY_MAP_PROPERTY = "map_property";
+  private Map<String, String> mapProperty = null;
+
+  public static final String JSON_PROPERTY_MAP_OF_MAP_PROPERTY = "map_of_map_property";
+  private Map<String, Map<String, String>> mapOfMapProperty = null;
+
+  public static final String JSON_PROPERTY_ANYTYPE1 = "anytype_1";
+  private JsonNullable<Object> anytype1 = JsonNullable.<Object>of(null);
+
+  public static final String JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_ANYTYPE1 = "map_with_undeclared_properties_anytype_1";
+  private Object mapWithUndeclaredPropertiesAnytype1;
+
+  public static final String JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_ANYTYPE2 = "map_with_undeclared_properties_anytype_2";
+  private Object mapWithUndeclaredPropertiesAnytype2;
+
+  public static final String JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_ANYTYPE3 = "map_with_undeclared_properties_anytype_3";
+  private Map<String, Object> mapWithUndeclaredPropertiesAnytype3 = null;
+
+  public static final String JSON_PROPERTY_EMPTY_MAP = "empty_map";
+  private Object emptyMap;
+
+  public static final String JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_STRING = "map_with_undeclared_properties_string";
+  private Map<String, String> mapWithUndeclaredPropertiesString = null;
+
+
+  public AdditionalPropertiesClass mapProperty(Map<String, String> mapProperty) {
+    
+    this.mapProperty = mapProperty;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapPropertyItem(String key, String mapPropertyItem) {
+    if (this.mapProperty == null) {
+      this.mapProperty = new HashMap<>();
+    }
+    this.mapProperty.put(key, mapPropertyItem);
+    return this;
+  }
+
+   /**
+   * Get mapProperty
+   * @return mapProperty
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_PROPERTY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, String> getMapProperty() {
+    return mapProperty;
+  }
+
+
+  public void setMapProperty(Map<String, String> mapProperty) {
+    this.mapProperty = mapProperty;
+  }
+
+
+  public AdditionalPropertiesClass mapOfMapProperty(Map<String, Map<String, String>> mapOfMapProperty) {
+    
+    this.mapOfMapProperty = mapOfMapProperty;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapOfMapPropertyItem(String key, Map<String, String> mapOfMapPropertyItem) {
+    if (this.mapOfMapProperty == null) {
+      this.mapOfMapProperty = new HashMap<>();
+    }
+    this.mapOfMapProperty.put(key, mapOfMapPropertyItem);
+    return this;
+  }
+
+   /**
+   * Get mapOfMapProperty
+   * @return mapOfMapProperty
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_OF_MAP_PROPERTY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Map<String, String>> getMapOfMapProperty() {
+    return mapOfMapProperty;
+  }
+
+
+  public void setMapOfMapProperty(Map<String, Map<String, String>> mapOfMapProperty) {
+    this.mapOfMapProperty = mapOfMapProperty;
+  }
+
+
+  public AdditionalPropertiesClass anytype1(Object anytype1) {
+    this.anytype1 = JsonNullable.<Object>of(anytype1);
+    
+    return this;
+  }
+
+   /**
+   * Get anytype1
+   * @return anytype1
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public Object getAnytype1() {
+        return anytype1.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_ANYTYPE1)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<Object> getAnytype1_JsonNullable() {
+    return anytype1;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_ANYTYPE1)
+  public void setAnytype1_JsonNullable(JsonNullable<Object> anytype1) {
+    this.anytype1 = anytype1;
+  }
+
+  public void setAnytype1(Object anytype1) {
+    this.anytype1 = JsonNullable.<Object>of(anytype1);
+  }
+
+
+  public AdditionalPropertiesClass mapWithUndeclaredPropertiesAnytype1(Object mapWithUndeclaredPropertiesAnytype1) {
+    
+    this.mapWithUndeclaredPropertiesAnytype1 = mapWithUndeclaredPropertiesAnytype1;
+    return this;
+  }
+
+   /**
+   * Get mapWithUndeclaredPropertiesAnytype1
+   * @return mapWithUndeclaredPropertiesAnytype1
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_ANYTYPE1)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Object getMapWithUndeclaredPropertiesAnytype1() {
+    return mapWithUndeclaredPropertiesAnytype1;
+  }
+
+
+  public void setMapWithUndeclaredPropertiesAnytype1(Object mapWithUndeclaredPropertiesAnytype1) {
+    this.mapWithUndeclaredPropertiesAnytype1 = mapWithUndeclaredPropertiesAnytype1;
+  }
+
+
+  public AdditionalPropertiesClass mapWithUndeclaredPropertiesAnytype2(Object mapWithUndeclaredPropertiesAnytype2) {
+    
+    this.mapWithUndeclaredPropertiesAnytype2 = mapWithUndeclaredPropertiesAnytype2;
+    return this;
+  }
+
+   /**
+   * Get mapWithUndeclaredPropertiesAnytype2
+   * @return mapWithUndeclaredPropertiesAnytype2
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_ANYTYPE2)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Object getMapWithUndeclaredPropertiesAnytype2() {
+    return mapWithUndeclaredPropertiesAnytype2;
+  }
+
+
+  public void setMapWithUndeclaredPropertiesAnytype2(Object mapWithUndeclaredPropertiesAnytype2) {
+    this.mapWithUndeclaredPropertiesAnytype2 = mapWithUndeclaredPropertiesAnytype2;
+  }
+
+
+  public AdditionalPropertiesClass mapWithUndeclaredPropertiesAnytype3(Map<String, Object> mapWithUndeclaredPropertiesAnytype3) {
+    
+    this.mapWithUndeclaredPropertiesAnytype3 = mapWithUndeclaredPropertiesAnytype3;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapWithUndeclaredPropertiesAnytype3Item(String key, Object mapWithUndeclaredPropertiesAnytype3Item) {
+    if (this.mapWithUndeclaredPropertiesAnytype3 == null) {
+      this.mapWithUndeclaredPropertiesAnytype3 = new HashMap<>();
+    }
+    this.mapWithUndeclaredPropertiesAnytype3.put(key, mapWithUndeclaredPropertiesAnytype3Item);
+    return this;
+  }
+
+   /**
+   * Get mapWithUndeclaredPropertiesAnytype3
+   * @return mapWithUndeclaredPropertiesAnytype3
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_ANYTYPE3)
+  @JsonInclude(content = JsonInclude.Include.ALWAYS, value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Object> getMapWithUndeclaredPropertiesAnytype3() {
+    return mapWithUndeclaredPropertiesAnytype3;
+  }
+
+
+  public void setMapWithUndeclaredPropertiesAnytype3(Map<String, Object> mapWithUndeclaredPropertiesAnytype3) {
+    this.mapWithUndeclaredPropertiesAnytype3 = mapWithUndeclaredPropertiesAnytype3;
+  }
+
+
+  public AdditionalPropertiesClass emptyMap(Object emptyMap) {
+    
+    this.emptyMap = emptyMap;
+    return this;
+  }
+
+   /**
+   * an object with no declared properties and no undeclared properties, hence it&#39;s an empty map.
+   * @return emptyMap
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "an object with no declared properties and no undeclared properties, hence it's an empty map.")
+  @JsonProperty(JSON_PROPERTY_EMPTY_MAP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Object getEmptyMap() {
+    return emptyMap;
+  }
+
+
+  public void setEmptyMap(Object emptyMap) {
+    this.emptyMap = emptyMap;
+  }
+
+
+  public AdditionalPropertiesClass mapWithUndeclaredPropertiesString(Map<String, String> mapWithUndeclaredPropertiesString) {
+    
+    this.mapWithUndeclaredPropertiesString = mapWithUndeclaredPropertiesString;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapWithUndeclaredPropertiesStringItem(String key, String mapWithUndeclaredPropertiesStringItem) {
+    if (this.mapWithUndeclaredPropertiesString == null) {
+      this.mapWithUndeclaredPropertiesString = new HashMap<>();
+    }
+    this.mapWithUndeclaredPropertiesString.put(key, mapWithUndeclaredPropertiesStringItem);
+    return this;
+  }
+
+   /**
+   * Get mapWithUndeclaredPropertiesString
+   * @return mapWithUndeclaredPropertiesString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_WITH_UNDECLARED_PROPERTIES_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, String> getMapWithUndeclaredPropertiesString() {
+    return mapWithUndeclaredPropertiesString;
+  }
+
+
+  public void setMapWithUndeclaredPropertiesString(Map<String, String> mapWithUndeclaredPropertiesString) {
+    this.mapWithUndeclaredPropertiesString = mapWithUndeclaredPropertiesString;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AdditionalPropertiesClass additionalPropertiesClass = (AdditionalPropertiesClass) o;
+    return Objects.equals(this.mapProperty, additionalPropertiesClass.mapProperty) &&
+        Objects.equals(this.mapOfMapProperty, additionalPropertiesClass.mapOfMapProperty) &&
+        Objects.equals(this.anytype1, additionalPropertiesClass.anytype1) &&
+        Objects.equals(this.mapWithUndeclaredPropertiesAnytype1, additionalPropertiesClass.mapWithUndeclaredPropertiesAnytype1) &&
+        Objects.equals(this.mapWithUndeclaredPropertiesAnytype2, additionalPropertiesClass.mapWithUndeclaredPropertiesAnytype2) &&
+        Objects.equals(this.mapWithUndeclaredPropertiesAnytype3, additionalPropertiesClass.mapWithUndeclaredPropertiesAnytype3) &&
+        Objects.equals(this.emptyMap, additionalPropertiesClass.emptyMap) &&
+        Objects.equals(this.mapWithUndeclaredPropertiesString, additionalPropertiesClass.mapWithUndeclaredPropertiesString);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(mapProperty, mapOfMapProperty, anytype1, mapWithUndeclaredPropertiesAnytype1, mapWithUndeclaredPropertiesAnytype2, mapWithUndeclaredPropertiesAnytype3, emptyMap, mapWithUndeclaredPropertiesString);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AdditionalPropertiesClass {\n");
+    sb.append("    mapProperty: ").append(toIndentedString(mapProperty)).append("\n");
+    sb.append("    mapOfMapProperty: ").append(toIndentedString(mapOfMapProperty)).append("\n");
+    sb.append("    anytype1: ").append(toIndentedString(anytype1)).append("\n");
+    sb.append("    mapWithUndeclaredPropertiesAnytype1: ").append(toIndentedString(mapWithUndeclaredPropertiesAnytype1)).append("\n");
+    sb.append("    mapWithUndeclaredPropertiesAnytype2: ").append(toIndentedString(mapWithUndeclaredPropertiesAnytype2)).append("\n");
+    sb.append("    mapWithUndeclaredPropertiesAnytype3: ").append(toIndentedString(mapWithUndeclaredPropertiesAnytype3)).append("\n");
+    sb.append("    emptyMap: ").append(toIndentedString(emptyMap)).append("\n");
+    sb.append("    mapWithUndeclaredPropertiesString: ").append(toIndentedString(mapWithUndeclaredPropertiesString)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Animal.java

@@ -0,0 +1,142 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Cat;
+import org.openapitools.client.model.Dog;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Animal
+ */
+@JsonPropertyOrder({
+  Animal.JSON_PROPERTY_CLASS_NAME,
+  Animal.JSON_PROPERTY_COLOR
+})
+
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = Cat.class, name = "Cat"),
+  @JsonSubTypes.Type(value = Dog.class, name = "Dog"),
+})
+
+public class Animal {
+  public static final String JSON_PROPERTY_CLASS_NAME = "className";
+  private String className;
+
+  public static final String JSON_PROPERTY_COLOR = "color";
+  private String color = "red";
+
+
+  public Animal className(String className) {
+    
+    this.className = className;
+    return this;
+  }
+
+   /**
+   * Get className
+   * @return className
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_CLASS_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getClassName() {
+    return className;
+  }
+
+
+  public void setClassName(String className) {
+    this.className = className;
+  }
+
+
+  public Animal color(String color) {
+    
+    this.color = color;
+    return this;
+  }
+
+   /**
+   * Get color
+   * @return color
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_COLOR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getColor() {
+    return color;
+  }
+
+
+  public void setColor(String color) {
+    this.color = color;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Animal animal = (Animal) o;
+    return Objects.equals(this.className, animal.className) &&
+        Objects.equals(this.color, animal.color);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(className, color);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Animal {\n");
+    sb.append("    className: ").append(toIndentedString(className)).append("\n");
+    sb.append("    color: ").append(toIndentedString(color)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Apple.java

@@ -0,0 +1,133 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Apple
+ */
+@JsonPropertyOrder({
+  Apple.JSON_PROPERTY_CULTIVAR,
+  Apple.JSON_PROPERTY_ORIGIN
+})
+
+public class Apple {
+  public static final String JSON_PROPERTY_CULTIVAR = "cultivar";
+  private String cultivar;
+
+  public static final String JSON_PROPERTY_ORIGIN = "origin";
+  private String origin;
+
+
+  public Apple cultivar(String cultivar) {
+    
+    this.cultivar = cultivar;
+    return this;
+  }
+
+   /**
+   * Get cultivar
+   * @return cultivar
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CULTIVAR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getCultivar() {
+    return cultivar;
+  }
+
+
+  public void setCultivar(String cultivar) {
+    this.cultivar = cultivar;
+  }
+
+
+  public Apple origin(String origin) {
+    
+    this.origin = origin;
+    return this;
+  }
+
+   /**
+   * Get origin
+   * @return origin
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ORIGIN)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getOrigin() {
+    return origin;
+  }
+
+
+  public void setOrigin(String origin) {
+    this.origin = origin;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Apple apple = (Apple) o;
+    return Objects.equals(this.cultivar, apple.cultivar) &&
+        Objects.equals(this.origin, apple.origin);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(cultivar, origin);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Apple {\n");
+    sb.append("    cultivar: ").append(toIndentedString(cultivar)).append("\n");
+    sb.append("    origin: ").append(toIndentedString(origin)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/AppleReq.java

@@ -0,0 +1,132 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * AppleReq
+ */
+@JsonPropertyOrder({
+  AppleReq.JSON_PROPERTY_CULTIVAR,
+  AppleReq.JSON_PROPERTY_MEALY
+})
+
+public class AppleReq {
+  public static final String JSON_PROPERTY_CULTIVAR = "cultivar";
+  private String cultivar;
+
+  public static final String JSON_PROPERTY_MEALY = "mealy";
+  private Boolean mealy;
+
+
+  public AppleReq cultivar(String cultivar) {
+    
+    this.cultivar = cultivar;
+    return this;
+  }
+
+   /**
+   * Get cultivar
+   * @return cultivar
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_CULTIVAR)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getCultivar() {
+    return cultivar;
+  }
+
+
+  public void setCultivar(String cultivar) {
+    this.cultivar = cultivar;
+  }
+
+
+  public AppleReq mealy(Boolean mealy) {
+    
+    this.mealy = mealy;
+    return this;
+  }
+
+   /**
+   * Get mealy
+   * @return mealy
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MEALY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Boolean getMealy() {
+    return mealy;
+  }
+
+
+  public void setMealy(Boolean mealy) {
+    this.mealy = mealy;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AppleReq appleReq = (AppleReq) o;
+    return Objects.equals(this.cultivar, appleReq.cultivar) &&
+        Objects.equals(this.mealy, appleReq.mealy);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(cultivar, mealy);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AppleReq {\n");
+    sb.append("    cultivar: ").append(toIndentedString(cultivar)).append("\n");
+    sb.append("    mealy: ").append(toIndentedString(mealy)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java

@@ -0,0 +1,113 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ArrayOfArrayOfNumberOnly
+ */
+@JsonPropertyOrder({
+  ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
+})
+
+public class ArrayOfArrayOfNumberOnly {
+  public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
+  private List<List<BigDecimal>> arrayArrayNumber = null;
+
+
+  public ArrayOfArrayOfNumberOnly arrayArrayNumber(List<List<BigDecimal>> arrayArrayNumber) {
+    
+    this.arrayArrayNumber = arrayArrayNumber;
+    return this;
+  }
+
+  public ArrayOfArrayOfNumberOnly addArrayArrayNumberItem(List<BigDecimal> arrayArrayNumberItem) {
+    if (this.arrayArrayNumber == null) {
+      this.arrayArrayNumber = new ArrayList<>();
+    }
+    this.arrayArrayNumber.add(arrayArrayNumberItem);
+    return this;
+  }
+
+   /**
+   * Get arrayArrayNumber
+   * @return arrayArrayNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ARRAY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<List<BigDecimal>> getArrayArrayNumber() {
+    return arrayArrayNumber;
+  }
+
+
+  public void setArrayArrayNumber(List<List<BigDecimal>> arrayArrayNumber) {
+    this.arrayArrayNumber = arrayArrayNumber;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ArrayOfArrayOfNumberOnly arrayOfArrayOfNumberOnly = (ArrayOfArrayOfNumberOnly) o;
+    return Objects.equals(this.arrayArrayNumber, arrayOfArrayOfNumberOnly.arrayArrayNumber);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(arrayArrayNumber);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ArrayOfArrayOfNumberOnly {\n");
+    sb.append("    arrayArrayNumber: ").append(toIndentedString(arrayArrayNumber)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java

@@ -0,0 +1,113 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ArrayOfNumberOnly
+ */
+@JsonPropertyOrder({
+  ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
+})
+
+public class ArrayOfNumberOnly {
+  public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
+  private List<BigDecimal> arrayNumber = null;
+
+
+  public ArrayOfNumberOnly arrayNumber(List<BigDecimal> arrayNumber) {
+    
+    this.arrayNumber = arrayNumber;
+    return this;
+  }
+
+  public ArrayOfNumberOnly addArrayNumberItem(BigDecimal arrayNumberItem) {
+    if (this.arrayNumber == null) {
+      this.arrayNumber = new ArrayList<>();
+    }
+    this.arrayNumber.add(arrayNumberItem);
+    return this;
+  }
+
+   /**
+   * Get arrayNumber
+   * @return arrayNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<BigDecimal> getArrayNumber() {
+    return arrayNumber;
+  }
+
+
+  public void setArrayNumber(List<BigDecimal> arrayNumber) {
+    this.arrayNumber = arrayNumber;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ArrayOfNumberOnly arrayOfNumberOnly = (ArrayOfNumberOnly) o;
+    return Objects.equals(this.arrayNumber, arrayOfNumberOnly.arrayNumber);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(arrayNumber);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ArrayOfNumberOnly {\n");
+    sb.append("    arrayNumber: ").append(toIndentedString(arrayNumber)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ArrayTest.java

@@ -0,0 +1,191 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.List;
+import org.openapitools.client.model.ReadOnlyFirst;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ArrayTest
+ */
+@JsonPropertyOrder({
+  ArrayTest.JSON_PROPERTY_ARRAY_OF_STRING,
+  ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
+  ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
+})
+
+public class ArrayTest {
+  public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
+  private List<String> arrayOfString = null;
+
+  public static final String JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER = "array_array_of_integer";
+  private List<List<Long>> arrayArrayOfInteger = null;
+
+  public static final String JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL = "array_array_of_model";
+  private List<List<ReadOnlyFirst>> arrayArrayOfModel = null;
+
+
+  public ArrayTest arrayOfString(List<String> arrayOfString) {
+    
+    this.arrayOfString = arrayOfString;
+    return this;
+  }
+
+  public ArrayTest addArrayOfStringItem(String arrayOfStringItem) {
+    if (this.arrayOfString == null) {
+      this.arrayOfString = new ArrayList<>();
+    }
+    this.arrayOfString.add(arrayOfStringItem);
+    return this;
+  }
+
+   /**
+   * Get arrayOfString
+   * @return arrayOfString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_OF_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<String> getArrayOfString() {
+    return arrayOfString;
+  }
+
+
+  public void setArrayOfString(List<String> arrayOfString) {
+    this.arrayOfString = arrayOfString;
+  }
+
+
+  public ArrayTest arrayArrayOfInteger(List<List<Long>> arrayArrayOfInteger) {
+    
+    this.arrayArrayOfInteger = arrayArrayOfInteger;
+    return this;
+  }
+
+  public ArrayTest addArrayArrayOfIntegerItem(List<Long> arrayArrayOfIntegerItem) {
+    if (this.arrayArrayOfInteger == null) {
+      this.arrayArrayOfInteger = new ArrayList<>();
+    }
+    this.arrayArrayOfInteger.add(arrayArrayOfIntegerItem);
+    return this;
+  }
+
+   /**
+   * Get arrayArrayOfInteger
+   * @return arrayArrayOfInteger
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<List<Long>> getArrayArrayOfInteger() {
+    return arrayArrayOfInteger;
+  }
+
+
+  public void setArrayArrayOfInteger(List<List<Long>> arrayArrayOfInteger) {
+    this.arrayArrayOfInteger = arrayArrayOfInteger;
+  }
+
+
+  public ArrayTest arrayArrayOfModel(List<List<ReadOnlyFirst>> arrayArrayOfModel) {
+    
+    this.arrayArrayOfModel = arrayArrayOfModel;
+    return this;
+  }
+
+  public ArrayTest addArrayArrayOfModelItem(List<ReadOnlyFirst> arrayArrayOfModelItem) {
+    if (this.arrayArrayOfModel == null) {
+      this.arrayArrayOfModel = new ArrayList<>();
+    }
+    this.arrayArrayOfModel.add(arrayArrayOfModelItem);
+    return this;
+  }
+
+   /**
+   * Get arrayArrayOfModel
+   * @return arrayArrayOfModel
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<List<ReadOnlyFirst>> getArrayArrayOfModel() {
+    return arrayArrayOfModel;
+  }
+
+
+  public void setArrayArrayOfModel(List<List<ReadOnlyFirst>> arrayArrayOfModel) {
+    this.arrayArrayOfModel = arrayArrayOfModel;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ArrayTest arrayTest = (ArrayTest) o;
+    return Objects.equals(this.arrayOfString, arrayTest.arrayOfString) &&
+        Objects.equals(this.arrayArrayOfInteger, arrayTest.arrayArrayOfInteger) &&
+        Objects.equals(this.arrayArrayOfModel, arrayTest.arrayArrayOfModel);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(arrayOfString, arrayArrayOfInteger, arrayArrayOfModel);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ArrayTest {\n");
+    sb.append("    arrayOfString: ").append(toIndentedString(arrayOfString)).append("\n");
+    sb.append("    arrayArrayOfInteger: ").append(toIndentedString(arrayArrayOfInteger)).append("\n");
+    sb.append("    arrayArrayOfModel: ").append(toIndentedString(arrayArrayOfModel)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Banana.java

@@ -0,0 +1,103 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Banana
+ */
+@JsonPropertyOrder({
+  Banana.JSON_PROPERTY_LENGTH_CM
+})
+
+public class Banana {
+  public static final String JSON_PROPERTY_LENGTH_CM = "lengthCm";
+  private BigDecimal lengthCm;
+
+
+  public Banana lengthCm(BigDecimal lengthCm) {
+    
+    this.lengthCm = lengthCm;
+    return this;
+  }
+
+   /**
+   * Get lengthCm
+   * @return lengthCm
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_LENGTH_CM)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public BigDecimal getLengthCm() {
+    return lengthCm;
+  }
+
+
+  public void setLengthCm(BigDecimal lengthCm) {
+    this.lengthCm = lengthCm;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Banana banana = (Banana) o;
+    return Objects.equals(this.lengthCm, banana.lengthCm);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(lengthCm);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Banana {\n");
+    sb.append("    lengthCm: ").append(toIndentedString(lengthCm)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/BananaReq.java

@@ -0,0 +1,133 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * BananaReq
+ */
+@JsonPropertyOrder({
+  BananaReq.JSON_PROPERTY_LENGTH_CM,
+  BananaReq.JSON_PROPERTY_SWEET
+})
+
+public class BananaReq {
+  public static final String JSON_PROPERTY_LENGTH_CM = "lengthCm";
+  private BigDecimal lengthCm;
+
+  public static final String JSON_PROPERTY_SWEET = "sweet";
+  private Boolean sweet;
+
+
+  public BananaReq lengthCm(BigDecimal lengthCm) {
+    
+    this.lengthCm = lengthCm;
+    return this;
+  }
+
+   /**
+   * Get lengthCm
+   * @return lengthCm
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_LENGTH_CM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public BigDecimal getLengthCm() {
+    return lengthCm;
+  }
+
+
+  public void setLengthCm(BigDecimal lengthCm) {
+    this.lengthCm = lengthCm;
+  }
+
+
+  public BananaReq sweet(Boolean sweet) {
+    
+    this.sweet = sweet;
+    return this;
+  }
+
+   /**
+   * Get sweet
+   * @return sweet
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SWEET)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Boolean getSweet() {
+    return sweet;
+  }
+
+
+  public void setSweet(Boolean sweet) {
+    this.sweet = sweet;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    BananaReq bananaReq = (BananaReq) o;
+    return Objects.equals(this.lengthCm, bananaReq.lengthCm) &&
+        Objects.equals(this.sweet, bananaReq.sweet);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(lengthCm, sweet);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class BananaReq {\n");
+    sb.append("    lengthCm: ").append(toIndentedString(lengthCm)).append("\n");
+    sb.append("    sweet: ").append(toIndentedString(sweet)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/BasquePig.java

@@ -0,0 +1,101 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * BasquePig
+ */
+@JsonPropertyOrder({
+  BasquePig.JSON_PROPERTY_CLASS_NAME
+})
+
+public class BasquePig {
+  public static final String JSON_PROPERTY_CLASS_NAME = "className";
+  private String className;
+
+
+  public BasquePig className(String className) {
+    
+    this.className = className;
+    return this;
+  }
+
+   /**
+   * Get className
+   * @return className
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_CLASS_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getClassName() {
+    return className;
+  }
+
+
+  public void setClassName(String className) {
+    this.className = className;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    BasquePig basquePig = (BasquePig) o;
+    return Objects.equals(this.className, basquePig.className);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(className);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class BasquePig {\n");
+    sb.append("    className: ").append(toIndentedString(className)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Capitalization.java

@@ -0,0 +1,257 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Capitalization
+ */
+@JsonPropertyOrder({
+  Capitalization.JSON_PROPERTY_SMALL_CAMEL,
+  Capitalization.JSON_PROPERTY_CAPITAL_CAMEL,
+  Capitalization.JSON_PROPERTY_SMALL_SNAKE,
+  Capitalization.JSON_PROPERTY_CAPITAL_SNAKE,
+  Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
+  Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
+})
+
+public class Capitalization {
+  public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
+  private String smallCamel;
+
+  public static final String JSON_PROPERTY_CAPITAL_CAMEL = "CapitalCamel";
+  private String capitalCamel;
+
+  public static final String JSON_PROPERTY_SMALL_SNAKE = "small_Snake";
+  private String smallSnake;
+
+  public static final String JSON_PROPERTY_CAPITAL_SNAKE = "Capital_Snake";
+  private String capitalSnake;
+
+  public static final String JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS = "SCA_ETH_Flow_Points";
+  private String scAETHFlowPoints;
+
+  public static final String JSON_PROPERTY_A_T_T_N_A_M_E = "ATT_NAME";
+  private String ATT_NAME;
+
+
+  public Capitalization smallCamel(String smallCamel) {
+    
+    this.smallCamel = smallCamel;
+    return this;
+  }
+
+   /**
+   * Get smallCamel
+   * @return smallCamel
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SMALL_CAMEL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getSmallCamel() {
+    return smallCamel;
+  }
+
+
+  public void setSmallCamel(String smallCamel) {
+    this.smallCamel = smallCamel;
+  }
+
+
+  public Capitalization capitalCamel(String capitalCamel) {
+    
+    this.capitalCamel = capitalCamel;
+    return this;
+  }
+
+   /**
+   * Get capitalCamel
+   * @return capitalCamel
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CAPITAL_CAMEL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getCapitalCamel() {
+    return capitalCamel;
+  }
+
+
+  public void setCapitalCamel(String capitalCamel) {
+    this.capitalCamel = capitalCamel;
+  }
+
+
+  public Capitalization smallSnake(String smallSnake) {
+    
+    this.smallSnake = smallSnake;
+    return this;
+  }
+
+   /**
+   * Get smallSnake
+   * @return smallSnake
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SMALL_SNAKE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getSmallSnake() {
+    return smallSnake;
+  }
+
+
+  public void setSmallSnake(String smallSnake) {
+    this.smallSnake = smallSnake;
+  }
+
+
+  public Capitalization capitalSnake(String capitalSnake) {
+    
+    this.capitalSnake = capitalSnake;
+    return this;
+  }
+
+   /**
+   * Get capitalSnake
+   * @return capitalSnake
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CAPITAL_SNAKE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getCapitalSnake() {
+    return capitalSnake;
+  }
+
+
+  public void setCapitalSnake(String capitalSnake) {
+    this.capitalSnake = capitalSnake;
+  }
+
+
+  public Capitalization scAETHFlowPoints(String scAETHFlowPoints) {
+    
+    this.scAETHFlowPoints = scAETHFlowPoints;
+    return this;
+  }
+
+   /**
+   * Get scAETHFlowPoints
+   * @return scAETHFlowPoints
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getScAETHFlowPoints() {
+    return scAETHFlowPoints;
+  }
+
+
+  public void setScAETHFlowPoints(String scAETHFlowPoints) {
+    this.scAETHFlowPoints = scAETHFlowPoints;
+  }
+
+
+  public Capitalization ATT_NAME(String ATT_NAME) {
+    
+    this.ATT_NAME = ATT_NAME;
+    return this;
+  }
+
+   /**
+   * Name of the pet 
+   * @return ATT_NAME
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "Name of the pet ")
+  @JsonProperty(JSON_PROPERTY_A_T_T_N_A_M_E)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getATTNAME() {
+    return ATT_NAME;
+  }
+
+
+  public void setATTNAME(String ATT_NAME) {
+    this.ATT_NAME = ATT_NAME;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Capitalization capitalization = (Capitalization) o;
+    return Objects.equals(this.smallCamel, capitalization.smallCamel) &&
+        Objects.equals(this.capitalCamel, capitalization.capitalCamel) &&
+        Objects.equals(this.smallSnake, capitalization.smallSnake) &&
+        Objects.equals(this.capitalSnake, capitalization.capitalSnake) &&
+        Objects.equals(this.scAETHFlowPoints, capitalization.scAETHFlowPoints) &&
+        Objects.equals(this.ATT_NAME, capitalization.ATT_NAME);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(smallCamel, capitalCamel, smallSnake, capitalSnake, scAETHFlowPoints, ATT_NAME);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Capitalization {\n");
+    sb.append("    smallCamel: ").append(toIndentedString(smallCamel)).append("\n");
+    sb.append("    capitalCamel: ").append(toIndentedString(capitalCamel)).append("\n");
+    sb.append("    smallSnake: ").append(toIndentedString(smallSnake)).append("\n");
+    sb.append("    capitalSnake: ").append(toIndentedString(capitalSnake)).append("\n");
+    sb.append("    scAETHFlowPoints: ").append(toIndentedString(scAETHFlowPoints)).append("\n");
+    sb.append("    ATT_NAME: ").append(toIndentedString(ATT_NAME)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Cat.java

@@ -0,0 +1,112 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Animal;
+import org.openapitools.client.model.CatAllOf;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Cat
+ */
+@JsonPropertyOrder({
+  Cat.JSON_PROPERTY_DECLAWED
+})
+
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
+@JsonSubTypes({
+})
+
+public class Cat extends Animal {
+  public static final String JSON_PROPERTY_DECLAWED = "declawed";
+  private Boolean declawed;
+
+
+  public Cat declawed(Boolean declawed) {
+    
+    this.declawed = declawed;
+    return this;
+  }
+
+   /**
+   * Get declawed
+   * @return declawed
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DECLAWED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Boolean getDeclawed() {
+    return declawed;
+  }
+
+
+  public void setDeclawed(Boolean declawed) {
+    this.declawed = declawed;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Cat cat = (Cat) o;
+    return Objects.equals(this.declawed, cat.declawed) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(declawed, super.hashCode());
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Cat {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    declawed: ").append(toIndentedString(declawed)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/CatAllOf.java

@@ -0,0 +1,102 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * CatAllOf
+ */
+@JsonPropertyOrder({
+  CatAllOf.JSON_PROPERTY_DECLAWED
+})
+
+public class CatAllOf {
+  public static final String JSON_PROPERTY_DECLAWED = "declawed";
+  private Boolean declawed;
+
+
+  public CatAllOf declawed(Boolean declawed) {
+    
+    this.declawed = declawed;
+    return this;
+  }
+
+   /**
+   * Get declawed
+   * @return declawed
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DECLAWED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Boolean getDeclawed() {
+    return declawed;
+  }
+
+
+  public void setDeclawed(Boolean declawed) {
+    this.declawed = declawed;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    CatAllOf catAllOf = (CatAllOf) o;
+    return Objects.equals(this.declawed, catAllOf.declawed);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(declawed);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class CatAllOf {\n");
+    sb.append("    declawed: ").append(toIndentedString(declawed)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Category.java

@@ -0,0 +1,132 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Category
+ */
+@JsonPropertyOrder({
+  Category.JSON_PROPERTY_ID,
+  Category.JSON_PROPERTY_NAME
+})
+
+public class Category {
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name = "default-name";
+
+
+  public Category id(Long id) {
+    
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public Category name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Category category = (Category) o;
+    return Objects.equals(this.id, category.id) &&
+        Objects.equals(this.name, category.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Category {\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ChildCat.java

@@ -0,0 +1,112 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.ChildCatAllOf;
+import org.openapitools.client.model.ParentPet;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ChildCat
+ */
+@JsonPropertyOrder({
+  ChildCat.JSON_PROPERTY_NAME
+})
+
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "pet_type", visible = true)
+@JsonSubTypes({
+})
+
+public class ChildCat extends ParentPet {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public ChildCat name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ChildCat childCat = (ChildCat) o;
+    return Objects.equals(this.name, childCat.name) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, super.hashCode());
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ChildCat {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ChildCatAllOf.java

@@ -0,0 +1,102 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ChildCatAllOf
+ */
+@JsonPropertyOrder({
+  ChildCatAllOf.JSON_PROPERTY_NAME
+})
+
+public class ChildCatAllOf {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public ChildCatAllOf name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ChildCatAllOf childCatAllOf = (ChildCatAllOf) o;
+    return Objects.equals(this.name, childCatAllOf.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ChildCatAllOf {\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ClassModel.java

@@ -0,0 +1,103 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Model for testing model with \"_class\" property
+ */
+@ApiModel(description = "Model for testing model with \"_class\" property")
+@JsonPropertyOrder({
+  ClassModel.JSON_PROPERTY_PROPERTY_CLASS
+})
+
+public class ClassModel {
+  public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
+  private String propertyClass;
+
+
+  public ClassModel propertyClass(String propertyClass) {
+    
+    this.propertyClass = propertyClass;
+    return this;
+  }
+
+   /**
+   * Get propertyClass
+   * @return propertyClass
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_PROPERTY_CLASS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getPropertyClass() {
+    return propertyClass;
+  }
+
+
+  public void setPropertyClass(String propertyClass) {
+    this.propertyClass = propertyClass;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ClassModel classModel = (ClassModel) o;
+    return Objects.equals(this.propertyClass, classModel.propertyClass);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(propertyClass);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ClassModel {\n");
+    sb.append("    propertyClass: ").append(toIndentedString(propertyClass)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Client.java

@@ -0,0 +1,102 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Client
+ */
+@JsonPropertyOrder({
+  Client.JSON_PROPERTY_CLIENT
+})
+
+public class Client {
+  public static final String JSON_PROPERTY_CLIENT = "client";
+  private String client;
+
+
+  public Client client(String client) {
+    
+    this.client = client;
+    return this;
+  }
+
+   /**
+   * Get client
+   * @return client
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CLIENT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getClient() {
+    return client;
+  }
+
+
+  public void setClient(String client) {
+    this.client = client;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Client client = (Client) o;
+    return Objects.equals(this.client, client.client);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(client);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Client {\n");
+    sb.append("    client: ").append(toIndentedString(client)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ComplexQuadrilateral.java

@@ -0,0 +1,133 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.QuadrilateralInterface;
+import org.openapitools.client.model.ShapeInterface;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ComplexQuadrilateral
+ */
+@JsonPropertyOrder({
+  ComplexQuadrilateral.JSON_PROPERTY_SHAPE_TYPE,
+  ComplexQuadrilateral.JSON_PROPERTY_QUADRILATERAL_TYPE
+})
+
+public class ComplexQuadrilateral {
+  public static final String JSON_PROPERTY_SHAPE_TYPE = "shapeType";
+  private String shapeType;
+
+  public static final String JSON_PROPERTY_QUADRILATERAL_TYPE = "quadrilateralType";
+  private String quadrilateralType;
+
+
+  public ComplexQuadrilateral shapeType(String shapeType) {
+    
+    this.shapeType = shapeType;
+    return this;
+  }
+
+   /**
+   * Get shapeType
+   * @return shapeType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_SHAPE_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getShapeType() {
+    return shapeType;
+  }
+
+
+  public void setShapeType(String shapeType) {
+    this.shapeType = shapeType;
+  }
+
+
+  public ComplexQuadrilateral quadrilateralType(String quadrilateralType) {
+    
+    this.quadrilateralType = quadrilateralType;
+    return this;
+  }
+
+   /**
+   * Get quadrilateralType
+   * @return quadrilateralType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_QUADRILATERAL_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getQuadrilateralType() {
+    return quadrilateralType;
+  }
+
+
+  public void setQuadrilateralType(String quadrilateralType) {
+    this.quadrilateralType = quadrilateralType;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ComplexQuadrilateral complexQuadrilateral = (ComplexQuadrilateral) o;
+    return Objects.equals(this.shapeType, complexQuadrilateral.shapeType) &&
+        Objects.equals(this.quadrilateralType, complexQuadrilateral.quadrilateralType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(shapeType, quadrilateralType);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ComplexQuadrilateral {\n");
+    sb.append("    shapeType: ").append(toIndentedString(shapeType)).append("\n");
+    sb.append("    quadrilateralType: ").append(toIndentedString(quadrilateralType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/DanishPig.java

@@ -0,0 +1,101 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * DanishPig
+ */
+@JsonPropertyOrder({
+  DanishPig.JSON_PROPERTY_CLASS_NAME
+})
+
+public class DanishPig {
+  public static final String JSON_PROPERTY_CLASS_NAME = "className";
+  private String className;
+
+
+  public DanishPig className(String className) {
+    
+    this.className = className;
+    return this;
+  }
+
+   /**
+   * Get className
+   * @return className
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_CLASS_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getClassName() {
+    return className;
+  }
+
+
+  public void setClassName(String className) {
+    this.className = className;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    DanishPig danishPig = (DanishPig) o;
+    return Objects.equals(this.className, danishPig.className);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(className);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class DanishPig {\n");
+    sb.append("    className: ").append(toIndentedString(className)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Dog.java

@@ -0,0 +1,112 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Animal;
+import org.openapitools.client.model.DogAllOf;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Dog
+ */
+@JsonPropertyOrder({
+  Dog.JSON_PROPERTY_BREED
+})
+
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
+@JsonSubTypes({
+})
+
+public class Dog extends Animal {
+  public static final String JSON_PROPERTY_BREED = "breed";
+  private String breed;
+
+
+  public Dog breed(String breed) {
+    
+    this.breed = breed;
+    return this;
+  }
+
+   /**
+   * Get breed
+   * @return breed
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BREED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBreed() {
+    return breed;
+  }
+
+
+  public void setBreed(String breed) {
+    this.breed = breed;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Dog dog = (Dog) o;
+    return Objects.equals(this.breed, dog.breed) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(breed, super.hashCode());
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Dog {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    breed: ").append(toIndentedString(breed)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/DogAllOf.java

@@ -0,0 +1,102 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * DogAllOf
+ */
+@JsonPropertyOrder({
+  DogAllOf.JSON_PROPERTY_BREED
+})
+
+public class DogAllOf {
+  public static final String JSON_PROPERTY_BREED = "breed";
+  private String breed;
+
+
+  public DogAllOf breed(String breed) {
+    
+    this.breed = breed;
+    return this;
+  }
+
+   /**
+   * Get breed
+   * @return breed
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BREED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBreed() {
+    return breed;
+  }
+
+
+  public void setBreed(String breed) {
+    this.breed = breed;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    DogAllOf dogAllOf = (DogAllOf) o;
+    return Objects.equals(this.breed, dogAllOf.breed);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(breed);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class DogAllOf {\n");
+    sb.append("    breed: ").append(toIndentedString(breed)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Drawing.java

@@ -0,0 +1,226 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.openapitools.client.model.Fruit;
+import org.openapitools.client.model.NullableShape;
+import org.openapitools.client.model.Shape;
+import org.openapitools.client.model.ShapeOrNull;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.util.NoSuchElementException;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Drawing
+ */
+@JsonPropertyOrder({
+  Drawing.JSON_PROPERTY_MAIN_SHAPE,
+  Drawing.JSON_PROPERTY_SHAPE_OR_NULL,
+  Drawing.JSON_PROPERTY_NULLABLE_SHAPE,
+  Drawing.JSON_PROPERTY_SHAPES
+})
+
+public class Drawing extends HashMap<String, Fruit> {
+  public static final String JSON_PROPERTY_MAIN_SHAPE = "mainShape";
+  private Shape mainShape = null;
+
+  public static final String JSON_PROPERTY_SHAPE_OR_NULL = "shapeOrNull";
+  private ShapeOrNull shapeOrNull = null;
+
+  public static final String JSON_PROPERTY_NULLABLE_SHAPE = "nullableShape";
+  private JsonNullable<NullableShape> nullableShape = JsonNullable.<NullableShape>of(null);
+
+  public static final String JSON_PROPERTY_SHAPES = "shapes";
+  private List<Shape> shapes = null;
+
+
+  public Drawing mainShape(Shape mainShape) {
+    
+    this.mainShape = mainShape;
+    return this;
+  }
+
+   /**
+   * Get mainShape
+   * @return mainShape
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAIN_SHAPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Shape getMainShape() {
+    return mainShape;
+  }
+
+
+  public void setMainShape(Shape mainShape) {
+    this.mainShape = mainShape;
+  }
+
+
+  public Drawing shapeOrNull(ShapeOrNull shapeOrNull) {
+    
+    this.shapeOrNull = shapeOrNull;
+    return this;
+  }
+
+   /**
+   * Get shapeOrNull
+   * @return shapeOrNull
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SHAPE_OR_NULL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public ShapeOrNull getShapeOrNull() {
+    return shapeOrNull;
+  }
+
+
+  public void setShapeOrNull(ShapeOrNull shapeOrNull) {
+    this.shapeOrNull = shapeOrNull;
+  }
+
+
+  public Drawing nullableShape(NullableShape nullableShape) {
+    this.nullableShape = JsonNullable.<NullableShape>of(nullableShape);
+    
+    return this;
+  }
+
+   /**
+   * Get nullableShape
+   * @return nullableShape
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public NullableShape getNullableShape() {
+        return nullableShape.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_NULLABLE_SHAPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<NullableShape> getNullableShape_JsonNullable() {
+    return nullableShape;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_NULLABLE_SHAPE)
+  public void setNullableShape_JsonNullable(JsonNullable<NullableShape> nullableShape) {
+    this.nullableShape = nullableShape;
+  }
+
+  public void setNullableShape(NullableShape nullableShape) {
+    this.nullableShape = JsonNullable.<NullableShape>of(nullableShape);
+  }
+
+
+  public Drawing shapes(List<Shape> shapes) {
+    
+    this.shapes = shapes;
+    return this;
+  }
+
+  public Drawing addShapesItem(Shape shapesItem) {
+    if (this.shapes == null) {
+      this.shapes = new ArrayList<>();
+    }
+    this.shapes.add(shapesItem);
+    return this;
+  }
+
+   /**
+   * Get shapes
+   * @return shapes
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SHAPES)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<Shape> getShapes() {
+    return shapes;
+  }
+
+
+  public void setShapes(List<Shape> shapes) {
+    this.shapes = shapes;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Drawing drawing = (Drawing) o;
+    return Objects.equals(this.mainShape, drawing.mainShape) &&
+        Objects.equals(this.shapeOrNull, drawing.shapeOrNull) &&
+        Objects.equals(this.nullableShape, drawing.nullableShape) &&
+        Objects.equals(this.shapes, drawing.shapes) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(mainShape, shapeOrNull, nullableShape, shapes, super.hashCode());
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Drawing {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    mainShape: ").append(toIndentedString(mainShape)).append("\n");
+    sb.append("    shapeOrNull: ").append(toIndentedString(shapeOrNull)).append("\n");
+    sb.append("    nullableShape: ").append(toIndentedString(nullableShape)).append("\n");
+    sb.append("    shapes: ").append(toIndentedString(shapes)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/EnumArrays.java

@@ -0,0 +1,213 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * EnumArrays
+ */
+@JsonPropertyOrder({
+  EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
+  EnumArrays.JSON_PROPERTY_ARRAY_ENUM
+})
+
+public class EnumArrays {
+  /**
+   * Gets or Sets justSymbol
+   */
+  public enum JustSymbolEnum {
+    GREATER_THAN_OR_EQUAL_TO(">="),
+    
+    DOLLAR("$");
+
+    private String value;
+
+    JustSymbolEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static JustSymbolEnum fromValue(String value) {
+      for (JustSymbolEnum b : JustSymbolEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_JUST_SYMBOL = "just_symbol";
+  private JustSymbolEnum justSymbol;
+
+  /**
+   * Gets or Sets arrayEnum
+   */
+  public enum ArrayEnumEnum {
+    FISH("fish"),
+    
+    CRAB("crab");
+
+    private String value;
+
+    ArrayEnumEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static ArrayEnumEnum fromValue(String value) {
+      for (ArrayEnumEnum b : ArrayEnumEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ARRAY_ENUM = "array_enum";
+  private List<ArrayEnumEnum> arrayEnum = null;
+
+
+  public EnumArrays justSymbol(JustSymbolEnum justSymbol) {
+    
+    this.justSymbol = justSymbol;
+    return this;
+  }
+
+   /**
+   * Get justSymbol
+   * @return justSymbol
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_JUST_SYMBOL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JustSymbolEnum getJustSymbol() {
+    return justSymbol;
+  }
+
+
+  public void setJustSymbol(JustSymbolEnum justSymbol) {
+    this.justSymbol = justSymbol;
+  }
+
+
+  public EnumArrays arrayEnum(List<ArrayEnumEnum> arrayEnum) {
+    
+    this.arrayEnum = arrayEnum;
+    return this;
+  }
+
+  public EnumArrays addArrayEnumItem(ArrayEnumEnum arrayEnumItem) {
+    if (this.arrayEnum == null) {
+      this.arrayEnum = new ArrayList<>();
+    }
+    this.arrayEnum.add(arrayEnumItem);
+    return this;
+  }
+
+   /**
+   * Get arrayEnum
+   * @return arrayEnum
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ENUM)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<ArrayEnumEnum> getArrayEnum() {
+    return arrayEnum;
+  }
+
+
+  public void setArrayEnum(List<ArrayEnumEnum> arrayEnum) {
+    this.arrayEnum = arrayEnum;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    EnumArrays enumArrays = (EnumArrays) o;
+    return Objects.equals(this.justSymbol, enumArrays.justSymbol) &&
+        Objects.equals(this.arrayEnum, enumArrays.arrayEnum);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(justSymbol, arrayEnum);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class EnumArrays {\n");
+    sb.append("    justSymbol: ").append(toIndentedString(justSymbol)).append("\n");
+    sb.append("    arrayEnum: ").append(toIndentedString(arrayEnum)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/EnumClass.java

@@ -0,0 +1,60 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Gets or Sets EnumClass
+ */
+public enum EnumClass {
+  
+  _ABC("_abc"),
+  
+  _EFG("-efg"),
+  
+  _XYZ_("(xyz)");
+
+  private String value;
+
+  EnumClass(String value) {
+    this.value = value;
+  }
+
+  @JsonValue
+  public String getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+
+  @JsonCreator
+  public static EnumClass fromValue(String value) {
+    for (EnumClass b : EnumClass.values()) {
+      if (b.value.equals(value)) {
+        return b;
+      }
+    }
+    throw new IllegalArgumentException("Unexpected value '" + value + "'");
+  }
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/EnumTest.java

@@ -0,0 +1,479 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.OuterEnum;
+import org.openapitools.client.model.OuterEnumDefaultValue;
+import org.openapitools.client.model.OuterEnumInteger;
+import org.openapitools.client.model.OuterEnumIntegerDefaultValue;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.util.NoSuchElementException;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * EnumTest
+ */
+@JsonPropertyOrder({
+  EnumTest.JSON_PROPERTY_ENUM_STRING,
+  EnumTest.JSON_PROPERTY_ENUM_STRING_REQUIRED,
+  EnumTest.JSON_PROPERTY_ENUM_INTEGER,
+  EnumTest.JSON_PROPERTY_ENUM_NUMBER,
+  EnumTest.JSON_PROPERTY_OUTER_ENUM,
+  EnumTest.JSON_PROPERTY_OUTER_ENUM_INTEGER,
+  EnumTest.JSON_PROPERTY_OUTER_ENUM_DEFAULT_VALUE,
+  EnumTest.JSON_PROPERTY_OUTER_ENUM_INTEGER_DEFAULT_VALUE
+})
+
+public class EnumTest {
+  /**
+   * Gets or Sets enumString
+   */
+  public enum EnumStringEnum {
+    UPPER("UPPER"),
+    
+    LOWER("lower"),
+    
+    EMPTY("");
+
+    private String value;
+
+    EnumStringEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static EnumStringEnum fromValue(String value) {
+      for (EnumStringEnum b : EnumStringEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ENUM_STRING = "enum_string";
+  private EnumStringEnum enumString;
+
+  /**
+   * Gets or Sets enumStringRequired
+   */
+  public enum EnumStringRequiredEnum {
+    UPPER("UPPER"),
+    
+    LOWER("lower"),
+    
+    EMPTY("");
+
+    private String value;
+
+    EnumStringRequiredEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static EnumStringRequiredEnum fromValue(String value) {
+      for (EnumStringRequiredEnum b : EnumStringRequiredEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ENUM_STRING_REQUIRED = "enum_string_required";
+  private EnumStringRequiredEnum enumStringRequired;
+
+  /**
+   * Gets or Sets enumInteger
+   */
+  public enum EnumIntegerEnum {
+    NUMBER_1(1),
+    
+    NUMBER_MINUS_1(-1);
+
+    private Integer value;
+
+    EnumIntegerEnum(Integer value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public Integer getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static EnumIntegerEnum fromValue(Integer value) {
+      for (EnumIntegerEnum b : EnumIntegerEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ENUM_INTEGER = "enum_integer";
+  private EnumIntegerEnum enumInteger;
+
+  /**
+   * Gets or Sets enumNumber
+   */
+  public enum EnumNumberEnum {
+    NUMBER_1_DOT_1(1.1),
+    
+    NUMBER_MINUS_1_DOT_2(-1.2);
+
+    private Double value;
+
+    EnumNumberEnum(Double value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public Double getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static EnumNumberEnum fromValue(Double value) {
+      for (EnumNumberEnum b : EnumNumberEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ENUM_NUMBER = "enum_number";
+  private EnumNumberEnum enumNumber;
+
+  public static final String JSON_PROPERTY_OUTER_ENUM = "outerEnum";
+  private JsonNullable<OuterEnum> outerEnum = JsonNullable.<OuterEnum>undefined();
+
+  public static final String JSON_PROPERTY_OUTER_ENUM_INTEGER = "outerEnumInteger";
+  private OuterEnumInteger outerEnumInteger;
+
+  public static final String JSON_PROPERTY_OUTER_ENUM_DEFAULT_VALUE = "outerEnumDefaultValue";
+  private OuterEnumDefaultValue outerEnumDefaultValue = OuterEnumDefaultValue.PLACED;
+
+  public static final String JSON_PROPERTY_OUTER_ENUM_INTEGER_DEFAULT_VALUE = "outerEnumIntegerDefaultValue";
+  private OuterEnumIntegerDefaultValue outerEnumIntegerDefaultValue = OuterEnumIntegerDefaultValue.NUMBER_0;
+
+
+  public EnumTest enumString(EnumStringEnum enumString) {
+    
+    this.enumString = enumString;
+    return this;
+  }
+
+   /**
+   * Get enumString
+   * @return enumString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ENUM_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public EnumStringEnum getEnumString() {
+    return enumString;
+  }
+
+
+  public void setEnumString(EnumStringEnum enumString) {
+    this.enumString = enumString;
+  }
+
+
+  public EnumTest enumStringRequired(EnumStringRequiredEnum enumStringRequired) {
+    
+    this.enumStringRequired = enumStringRequired;
+    return this;
+  }
+
+   /**
+   * Get enumStringRequired
+   * @return enumStringRequired
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_ENUM_STRING_REQUIRED)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public EnumStringRequiredEnum getEnumStringRequired() {
+    return enumStringRequired;
+  }
+
+
+  public void setEnumStringRequired(EnumStringRequiredEnum enumStringRequired) {
+    this.enumStringRequired = enumStringRequired;
+  }
+
+
+  public EnumTest enumInteger(EnumIntegerEnum enumInteger) {
+    
+    this.enumInteger = enumInteger;
+    return this;
+  }
+
+   /**
+   * Get enumInteger
+   * @return enumInteger
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ENUM_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public EnumIntegerEnum getEnumInteger() {
+    return enumInteger;
+  }
+
+
+  public void setEnumInteger(EnumIntegerEnum enumInteger) {
+    this.enumInteger = enumInteger;
+  }
+
+
+  public EnumTest enumNumber(EnumNumberEnum enumNumber) {
+    
+    this.enumNumber = enumNumber;
+    return this;
+  }
+
+   /**
+   * Get enumNumber
+   * @return enumNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ENUM_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public EnumNumberEnum getEnumNumber() {
+    return enumNumber;
+  }
+
+
+  public void setEnumNumber(EnumNumberEnum enumNumber) {
+    this.enumNumber = enumNumber;
+  }
+
+
+  public EnumTest outerEnum(OuterEnum outerEnum) {
+    this.outerEnum = JsonNullable.<OuterEnum>of(outerEnum);
+    
+    return this;
+  }
+
+   /**
+   * Get outerEnum
+   * @return outerEnum
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public OuterEnum getOuterEnum() {
+        return outerEnum.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<OuterEnum> getOuterEnum_JsonNullable() {
+    return outerEnum;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM)
+  public void setOuterEnum_JsonNullable(JsonNullable<OuterEnum> outerEnum) {
+    this.outerEnum = outerEnum;
+  }
+
+  public void setOuterEnum(OuterEnum outerEnum) {
+    this.outerEnum = JsonNullable.<OuterEnum>of(outerEnum);
+  }
+
+
+  public EnumTest outerEnumInteger(OuterEnumInteger outerEnumInteger) {
+    
+    this.outerEnumInteger = outerEnumInteger;
+    return this;
+  }
+
+   /**
+   * Get outerEnumInteger
+   * @return outerEnumInteger
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OuterEnumInteger getOuterEnumInteger() {
+    return outerEnumInteger;
+  }
+
+
+  public void setOuterEnumInteger(OuterEnumInteger outerEnumInteger) {
+    this.outerEnumInteger = outerEnumInteger;
+  }
+
+
+  public EnumTest outerEnumDefaultValue(OuterEnumDefaultValue outerEnumDefaultValue) {
+    
+    this.outerEnumDefaultValue = outerEnumDefaultValue;
+    return this;
+  }
+
+   /**
+   * Get outerEnumDefaultValue
+   * @return outerEnumDefaultValue
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM_DEFAULT_VALUE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OuterEnumDefaultValue getOuterEnumDefaultValue() {
+    return outerEnumDefaultValue;
+  }
+
+
+  public void setOuterEnumDefaultValue(OuterEnumDefaultValue outerEnumDefaultValue) {
+    this.outerEnumDefaultValue = outerEnumDefaultValue;
+  }
+
+
+  public EnumTest outerEnumIntegerDefaultValue(OuterEnumIntegerDefaultValue outerEnumIntegerDefaultValue) {
+    
+    this.outerEnumIntegerDefaultValue = outerEnumIntegerDefaultValue;
+    return this;
+  }
+
+   /**
+   * Get outerEnumIntegerDefaultValue
+   * @return outerEnumIntegerDefaultValue
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM_INTEGER_DEFAULT_VALUE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OuterEnumIntegerDefaultValue getOuterEnumIntegerDefaultValue() {
+    return outerEnumIntegerDefaultValue;
+  }
+
+
+  public void setOuterEnumIntegerDefaultValue(OuterEnumIntegerDefaultValue outerEnumIntegerDefaultValue) {
+    this.outerEnumIntegerDefaultValue = outerEnumIntegerDefaultValue;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    EnumTest enumTest = (EnumTest) o;
+    return Objects.equals(this.enumString, enumTest.enumString) &&
+        Objects.equals(this.enumStringRequired, enumTest.enumStringRequired) &&
+        Objects.equals(this.enumInteger, enumTest.enumInteger) &&
+        Objects.equals(this.enumNumber, enumTest.enumNumber) &&
+        Objects.equals(this.outerEnum, enumTest.outerEnum) &&
+        Objects.equals(this.outerEnumInteger, enumTest.outerEnumInteger) &&
+        Objects.equals(this.outerEnumDefaultValue, enumTest.outerEnumDefaultValue) &&
+        Objects.equals(this.outerEnumIntegerDefaultValue, enumTest.outerEnumIntegerDefaultValue);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(enumString, enumStringRequired, enumInteger, enumNumber, outerEnum, outerEnumInteger, outerEnumDefaultValue, outerEnumIntegerDefaultValue);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class EnumTest {\n");
+    sb.append("    enumString: ").append(toIndentedString(enumString)).append("\n");
+    sb.append("    enumStringRequired: ").append(toIndentedString(enumStringRequired)).append("\n");
+    sb.append("    enumInteger: ").append(toIndentedString(enumInteger)).append("\n");
+    sb.append("    enumNumber: ").append(toIndentedString(enumNumber)).append("\n");
+    sb.append("    outerEnum: ").append(toIndentedString(outerEnum)).append("\n");
+    sb.append("    outerEnumInteger: ").append(toIndentedString(outerEnumInteger)).append("\n");
+    sb.append("    outerEnumDefaultValue: ").append(toIndentedString(outerEnumDefaultValue)).append("\n");
+    sb.append("    outerEnumIntegerDefaultValue: ").append(toIndentedString(outerEnumIntegerDefaultValue)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/EquilateralTriangle.java

@@ -0,0 +1,133 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.ShapeInterface;
+import org.openapitools.client.model.TriangleInterface;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * EquilateralTriangle
+ */
+@JsonPropertyOrder({
+  EquilateralTriangle.JSON_PROPERTY_SHAPE_TYPE,
+  EquilateralTriangle.JSON_PROPERTY_TRIANGLE_TYPE
+})
+
+public class EquilateralTriangle {
+  public static final String JSON_PROPERTY_SHAPE_TYPE = "shapeType";
+  private String shapeType;
+
+  public static final String JSON_PROPERTY_TRIANGLE_TYPE = "triangleType";
+  private String triangleType;
+
+
+  public EquilateralTriangle shapeType(String shapeType) {
+    
+    this.shapeType = shapeType;
+    return this;
+  }
+
+   /**
+   * Get shapeType
+   * @return shapeType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_SHAPE_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getShapeType() {
+    return shapeType;
+  }
+
+
+  public void setShapeType(String shapeType) {
+    this.shapeType = shapeType;
+  }
+
+
+  public EquilateralTriangle triangleType(String triangleType) {
+    
+    this.triangleType = triangleType;
+    return this;
+  }
+
+   /**
+   * Get triangleType
+   * @return triangleType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_TRIANGLE_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getTriangleType() {
+    return triangleType;
+  }
+
+
+  public void setTriangleType(String triangleType) {
+    this.triangleType = triangleType;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    EquilateralTriangle equilateralTriangle = (EquilateralTriangle) o;
+    return Objects.equals(this.shapeType, equilateralTriangle.shapeType) &&
+        Objects.equals(this.triangleType, equilateralTriangle.triangleType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(shapeType, triangleType);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class EquilateralTriangle {\n");
+    sb.append("    shapeType: ").append(toIndentedString(shapeType)).append("\n");
+    sb.append("    triangleType: ").append(toIndentedString(triangleType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java

@@ -0,0 +1,143 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * FileSchemaTestClass
+ */
+@JsonPropertyOrder({
+  FileSchemaTestClass.JSON_PROPERTY_FILE,
+  FileSchemaTestClass.JSON_PROPERTY_FILES
+})
+
+public class FileSchemaTestClass {
+  public static final String JSON_PROPERTY_FILE = "file";
+  private java.io.File file;
+
+  public static final String JSON_PROPERTY_FILES = "files";
+  private List<java.io.File> files = null;
+
+
+  public FileSchemaTestClass file(java.io.File file) {
+    
+    this.file = file;
+    return this;
+  }
+
+   /**
+   * Get file
+   * @return file
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_FILE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public java.io.File getFile() {
+    return file;
+  }
+
+
+  public void setFile(java.io.File file) {
+    this.file = file;
+  }
+
+
+  public FileSchemaTestClass files(List<java.io.File> files) {
+    
+    this.files = files;
+    return this;
+  }
+
+  public FileSchemaTestClass addFilesItem(java.io.File filesItem) {
+    if (this.files == null) {
+      this.files = new ArrayList<>();
+    }
+    this.files.add(filesItem);
+    return this;
+  }
+
+   /**
+   * Get files
+   * @return files
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_FILES)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<java.io.File> getFiles() {
+    return files;
+  }
+
+
+  public void setFiles(List<java.io.File> files) {
+    this.files = files;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    FileSchemaTestClass fileSchemaTestClass = (FileSchemaTestClass) o;
+    return Objects.equals(this.file, fileSchemaTestClass.file) &&
+        Objects.equals(this.files, fileSchemaTestClass.files);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(file, files);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class FileSchemaTestClass {\n");
+    sb.append("    file: ").append(toIndentedString(file)).append("\n");
+    sb.append("    files: ").append(toIndentedString(files)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Foo.java

@@ -0,0 +1,102 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Foo
+ */
+@JsonPropertyOrder({
+  Foo.JSON_PROPERTY_BAR
+})
+
+public class Foo {
+  public static final String JSON_PROPERTY_BAR = "bar";
+  private String bar = "bar";
+
+
+  public Foo bar(String bar) {
+    
+    this.bar = bar;
+    return this;
+  }
+
+   /**
+   * Get bar
+   * @return bar
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BAR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBar() {
+    return bar;
+  }
+
+
+  public void setBar(String bar) {
+    this.bar = bar;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Foo foo = (Foo) o;
+    return Objects.equals(this.bar, foo.bar);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(bar);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Foo {\n");
+    sb.append("    bar: ").append(toIndentedString(bar)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/FormatTest.java

@@ -0,0 +1,547 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.File;
+import java.math.BigDecimal;
+import java.time.LocalDate;
+import java.time.OffsetDateTime;
+import java.util.UUID;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * FormatTest
+ */
+@JsonPropertyOrder({
+  FormatTest.JSON_PROPERTY_INTEGER,
+  FormatTest.JSON_PROPERTY_INT32,
+  FormatTest.JSON_PROPERTY_INT64,
+  FormatTest.JSON_PROPERTY_NUMBER,
+  FormatTest.JSON_PROPERTY_FLOAT,
+  FormatTest.JSON_PROPERTY_DOUBLE,
+  FormatTest.JSON_PROPERTY_STRING,
+  FormatTest.JSON_PROPERTY_BYTE,
+  FormatTest.JSON_PROPERTY_BINARY,
+  FormatTest.JSON_PROPERTY_DATE,
+  FormatTest.JSON_PROPERTY_DATE_TIME,
+  FormatTest.JSON_PROPERTY_UUID,
+  FormatTest.JSON_PROPERTY_PASSWORD,
+  FormatTest.JSON_PROPERTY_PATTERN_WITH_DIGITS,
+  FormatTest.JSON_PROPERTY_PATTERN_WITH_DIGITS_AND_DELIMITER
+})
+
+public class FormatTest {
+  public static final String JSON_PROPERTY_INTEGER = "integer";
+  private Integer integer;
+
+  public static final String JSON_PROPERTY_INT32 = "int32";
+  private Integer int32;
+
+  public static final String JSON_PROPERTY_INT64 = "int64";
+  private Long int64;
+
+  public static final String JSON_PROPERTY_NUMBER = "number";
+  private BigDecimal number;
+
+  public static final String JSON_PROPERTY_FLOAT = "float";
+  private Float _float;
+
+  public static final String JSON_PROPERTY_DOUBLE = "double";
+  private Double _double;
+
+  public static final String JSON_PROPERTY_STRING = "string";
+  private String string;
+
+  public static final String JSON_PROPERTY_BYTE = "byte";
+  private byte[] _byte;
+
+  public static final String JSON_PROPERTY_BINARY = "binary";
+  private File binary;
+
+  public static final String JSON_PROPERTY_DATE = "date";
+  private LocalDate date;
+
+  public static final String JSON_PROPERTY_DATE_TIME = "dateTime";
+  private OffsetDateTime dateTime;
+
+  public static final String JSON_PROPERTY_UUID = "uuid";
+  private UUID uuid;
+
+  public static final String JSON_PROPERTY_PASSWORD = "password";
+  private String password;
+
+  public static final String JSON_PROPERTY_PATTERN_WITH_DIGITS = "pattern_with_digits";
+  private String patternWithDigits;
+
+  public static final String JSON_PROPERTY_PATTERN_WITH_DIGITS_AND_DELIMITER = "pattern_with_digits_and_delimiter";
+  private String patternWithDigitsAndDelimiter;
+
+
+  public FormatTest integer(Integer integer) {
+    
+    this.integer = integer;
+    return this;
+  }
+
+   /**
+   * Get integer
+   * minimum: 10
+   * maximum: 100
+   * @return integer
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getInteger() {
+    return integer;
+  }
+
+
+  public void setInteger(Integer integer) {
+    this.integer = integer;
+  }
+
+
+  public FormatTest int32(Integer int32) {
+    
+    this.int32 = int32;
+    return this;
+  }
+
+   /**
+   * Get int32
+   * minimum: 20
+   * maximum: 200
+   * @return int32
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_INT32)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getInt32() {
+    return int32;
+  }
+
+
+  public void setInt32(Integer int32) {
+    this.int32 = int32;
+  }
+
+
+  public FormatTest int64(Long int64) {
+    
+    this.int64 = int64;
+    return this;
+  }
+
+   /**
+   * Get int64
+   * @return int64
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_INT64)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getInt64() {
+    return int64;
+  }
+
+
+  public void setInt64(Long int64) {
+    this.int64 = int64;
+  }
+
+
+  public FormatTest number(BigDecimal number) {
+    
+    this.number = number;
+    return this;
+  }
+
+   /**
+   * Get number
+   * minimum: 32.1
+   * maximum: 543.2
+   * @return number
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public BigDecimal getNumber() {
+    return number;
+  }
+
+
+  public void setNumber(BigDecimal number) {
+    this.number = number;
+  }
+
+
+  public FormatTest _float(Float _float) {
+    
+    this._float = _float;
+    return this;
+  }
+
+   /**
+   * Get _float
+   * minimum: 54.3
+   * maximum: 987.6
+   * @return _float
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_FLOAT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Float getFloat() {
+    return _float;
+  }
+
+
+  public void setFloat(Float _float) {
+    this._float = _float;
+  }
+
+
+  public FormatTest _double(Double _double) {
+    
+    this._double = _double;
+    return this;
+  }
+
+   /**
+   * Get _double
+   * minimum: 67.8
+   * maximum: 123.4
+   * @return _double
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DOUBLE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Double getDouble() {
+    return _double;
+  }
+
+
+  public void setDouble(Double _double) {
+    this._double = _double;
+  }
+
+
+  public FormatTest string(String string) {
+    
+    this.string = string;
+    return this;
+  }
+
+   /**
+   * Get string
+   * @return string
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getString() {
+    return string;
+  }
+
+
+  public void setString(String string) {
+    this.string = string;
+  }
+
+
+  public FormatTest _byte(byte[] _byte) {
+    
+    this._byte = _byte;
+    return this;
+  }
+
+   /**
+   * Get _byte
+   * @return _byte
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_BYTE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public byte[] getByte() {
+    return _byte;
+  }
+
+
+  public void setByte(byte[] _byte) {
+    this._byte = _byte;
+  }
+
+
+  public FormatTest binary(File binary) {
+    
+    this.binary = binary;
+    return this;
+  }
+
+   /**
+   * Get binary
+   * @return binary
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BINARY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public File getBinary() {
+    return binary;
+  }
+
+
+  public void setBinary(File binary) {
+    this.binary = binary;
+  }
+
+
+  public FormatTest date(LocalDate date) {
+    
+    this.date = date;
+    return this;
+  }
+
+   /**
+   * Get date
+   * @return date
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_DATE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public LocalDate getDate() {
+    return date;
+  }
+
+
+  public void setDate(LocalDate date) {
+    this.date = date;
+  }
+
+
+  public FormatTest dateTime(OffsetDateTime dateTime) {
+    
+    this.dateTime = dateTime;
+    return this;
+  }
+
+   /**
+   * Get dateTime
+   * @return dateTime
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DATE_TIME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OffsetDateTime getDateTime() {
+    return dateTime;
+  }
+
+
+  public void setDateTime(OffsetDateTime dateTime) {
+    this.dateTime = dateTime;
+  }
+
+
+  public FormatTest uuid(UUID uuid) {
+    
+    this.uuid = uuid;
+    return this;
+  }
+
+   /**
+   * Get uuid
+   * @return uuid
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(example = "72f98069-206d-4f12-9f12-3d1e525a8e84", value = "")
+  @JsonProperty(JSON_PROPERTY_UUID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public UUID getUuid() {
+    return uuid;
+  }
+
+
+  public void setUuid(UUID uuid) {
+    this.uuid = uuid;
+  }
+
+
+  public FormatTest password(String password) {
+    
+    this.password = password;
+    return this;
+  }
+
+   /**
+   * Get password
+   * @return password
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_PASSWORD)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getPassword() {
+    return password;
+  }
+
+
+  public void setPassword(String password) {
+    this.password = password;
+  }
+
+
+  public FormatTest patternWithDigits(String patternWithDigits) {
+    
+    this.patternWithDigits = patternWithDigits;
+    return this;
+  }
+
+   /**
+   * A string that is a 10 digit number. Can have leading zeros.
+   * @return patternWithDigits
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "A string that is a 10 digit number. Can have leading zeros.")
+  @JsonProperty(JSON_PROPERTY_PATTERN_WITH_DIGITS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getPatternWithDigits() {
+    return patternWithDigits;
+  }
+
+
+  public void setPatternWithDigits(String patternWithDigits) {
+    this.patternWithDigits = patternWithDigits;
+  }
+
+
+  public FormatTest patternWithDigitsAndDelimiter(String patternWithDigitsAndDelimiter) {
+    
+    this.patternWithDigitsAndDelimiter = patternWithDigitsAndDelimiter;
+    return this;
+  }
+
+   /**
+   * A string starting with 'image_' (case insensitive) and one to three digits following i.e. Image_01.
+   * @return patternWithDigitsAndDelimiter
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "A string starting with 'image_' (case insensitive) and one to three digits following i.e. Image_01.")
+  @JsonProperty(JSON_PROPERTY_PATTERN_WITH_DIGITS_AND_DELIMITER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getPatternWithDigitsAndDelimiter() {
+    return patternWithDigitsAndDelimiter;
+  }
+
+
+  public void setPatternWithDigitsAndDelimiter(String patternWithDigitsAndDelimiter) {
+    this.patternWithDigitsAndDelimiter = patternWithDigitsAndDelimiter;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    FormatTest formatTest = (FormatTest) o;
+    return Objects.equals(this.integer, formatTest.integer) &&
+        Objects.equals(this.int32, formatTest.int32) &&
+        Objects.equals(this.int64, formatTest.int64) &&
+        Objects.equals(this.number, formatTest.number) &&
+        Objects.equals(this._float, formatTest._float) &&
+        Objects.equals(this._double, formatTest._double) &&
+        Objects.equals(this.string, formatTest.string) &&
+        Arrays.equals(this._byte, formatTest._byte) &&
+        Objects.equals(this.binary, formatTest.binary) &&
+        Objects.equals(this.date, formatTest.date) &&
+        Objects.equals(this.dateTime, formatTest.dateTime) &&
+        Objects.equals(this.uuid, formatTest.uuid) &&
+        Objects.equals(this.password, formatTest.password) &&
+        Objects.equals(this.patternWithDigits, formatTest.patternWithDigits) &&
+        Objects.equals(this.patternWithDigitsAndDelimiter, formatTest.patternWithDigitsAndDelimiter);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(integer, int32, int64, number, _float, _double, string, Arrays.hashCode(_byte), binary, date, dateTime, uuid, password, patternWithDigits, patternWithDigitsAndDelimiter);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class FormatTest {\n");
+    sb.append("    integer: ").append(toIndentedString(integer)).append("\n");
+    sb.append("    int32: ").append(toIndentedString(int32)).append("\n");
+    sb.append("    int64: ").append(toIndentedString(int64)).append("\n");
+    sb.append("    number: ").append(toIndentedString(number)).append("\n");
+    sb.append("    _float: ").append(toIndentedString(_float)).append("\n");
+    sb.append("    _double: ").append(toIndentedString(_double)).append("\n");
+    sb.append("    string: ").append(toIndentedString(string)).append("\n");
+    sb.append("    _byte: ").append(toIndentedString(_byte)).append("\n");
+    sb.append("    binary: ").append(toIndentedString(binary)).append("\n");
+    sb.append("    date: ").append(toIndentedString(date)).append("\n");
+    sb.append("    dateTime: ").append(toIndentedString(dateTime)).append("\n");
+    sb.append("    uuid: ").append(toIndentedString(uuid)).append("\n");
+    sb.append("    password: ").append(toIndentedString(password)).append("\n");
+    sb.append("    patternWithDigits: ").append(toIndentedString(patternWithDigits)).append("\n");
+    sb.append("    patternWithDigitsAndDelimiter: ").append(toIndentedString(patternWithDigitsAndDelimiter)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Fruit.java

@@ -0,0 +1,141 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import org.openapitools.client.model.Apple;
+import org.openapitools.client.model.Banana;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+
+@JsonDeserialize(using=Fruit.FruitDeserializer.class)
+public class Fruit extends AbstractOpenApiSchema {
+    private static final Logger log = Logger.getLogger(Fruit.class.getName());
+
+    public static class FruitDeserializer extends StdDeserializer<Fruit> {
+        public FruitDeserializer() {
+            this(Fruit.class);
+        }
+
+        public FruitDeserializer(Class<?> vc) {
+            super(vc);
+        }
+
+        @Override
+        public Fruit deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+            JsonNode tree = jp.readValueAsTree();
+
+            int match = 0;
+            Object deserialized = null;
+            // deserialize Apple
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Apple.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Apple'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Apple'", e);
+            }
+
+            // deserialize Banana
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Banana.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Banana'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Banana'", e);
+            }
+
+            if (match == 1) {
+                Fruit ret = new Fruit();
+                ret.setActualInstance(deserialized);
+                return ret;
+            }
+            throw new IOException(String.format("Failed deserialization for Fruit: %d classes match result, expected 1", match));
+        }
+    }
+
+    // store a list of schema names defined in oneOf
+    public final static Map<String, GenericType> schemas = new HashMap<String, GenericType>();
+
+    public Fruit() {
+        super("oneOf", Boolean.FALSE);
+    }
+
+    public Fruit(Apple o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    public Fruit(Banana o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    static {
+        schemas.put("Apple", new GenericType<Apple>() {
+        });
+        schemas.put("Banana", new GenericType<Banana>() {
+        });
+    }
+
+    @Override
+    public Map<String, GenericType> getSchemas() {
+        return Fruit.schemas;
+    }
+
+    @Override
+    public void setActualInstance(Object instance) {
+        if (instance instanceof Apple) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof Banana) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        throw new RuntimeException("Invalid instance type. Must be Apple, Banana");
+    }
+
+
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/FruitReq.java

@@ -0,0 +1,141 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import org.openapitools.client.model.AppleReq;
+import org.openapitools.client.model.BananaReq;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+
+@JsonDeserialize(using=FruitReq.FruitReqDeserializer.class)
+public class FruitReq extends AbstractOpenApiSchema {
+    private static final Logger log = Logger.getLogger(FruitReq.class.getName());
+
+    public static class FruitReqDeserializer extends StdDeserializer<FruitReq> {
+        public FruitReqDeserializer() {
+            this(FruitReq.class);
+        }
+
+        public FruitReqDeserializer(Class<?> vc) {
+            super(vc);
+        }
+
+        @Override
+        public FruitReq deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+            JsonNode tree = jp.readValueAsTree();
+
+            int match = 0;
+            Object deserialized = null;
+            // deserialize AppleReq
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(AppleReq.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'AppleReq'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'AppleReq'", e);
+            }
+
+            // deserialize BananaReq
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(BananaReq.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'BananaReq'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'BananaReq'", e);
+            }
+
+            if (match == 1) {
+                FruitReq ret = new FruitReq();
+                ret.setActualInstance(deserialized);
+                return ret;
+            }
+            throw new IOException(String.format("Failed deserialization for FruitReq: %d classes match result, expected 1", match));
+        }
+    }
+
+    // store a list of schema names defined in oneOf
+    public final static Map<String, GenericType> schemas = new HashMap<String, GenericType>();
+
+    public FruitReq() {
+        super("oneOf", Boolean.TRUE);
+    }
+
+    public FruitReq(AppleReq o) {
+        super("oneOf", Boolean.TRUE);
+        setActualInstance(o);
+    }
+
+    public FruitReq(BananaReq o) {
+        super("oneOf", Boolean.TRUE);
+        setActualInstance(o);
+    }
+
+    static {
+        schemas.put("AppleReq", new GenericType<AppleReq>() {
+        });
+        schemas.put("BananaReq", new GenericType<BananaReq>() {
+        });
+    }
+
+    @Override
+    public Map<String, GenericType> getSchemas() {
+        return FruitReq.schemas;
+    }
+
+    @Override
+    public void setActualInstance(Object instance) {
+        if (instance instanceof AppleReq) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof BananaReq) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        throw new RuntimeException("Invalid instance type. Must be AppleReq, BananaReq");
+    }
+
+
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/GmFruit.java

@@ -0,0 +1,134 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import org.openapitools.client.model.Apple;
+import org.openapitools.client.model.Banana;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+
+@JsonDeserialize(using=GmFruit.GmFruitDeserializer.class)
+public class GmFruit extends AbstractOpenApiSchema {
+    private static final Logger log = Logger.getLogger(GmFruit.class.getName());
+
+    public static class GmFruitDeserializer extends StdDeserializer<GmFruit> {
+        public GmFruitDeserializer() {
+            this(GmFruit.class);
+        }
+
+        public GmFruitDeserializer(Class<?> vc) {
+            super(vc);
+        }
+
+        @Override
+        public GmFruit deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+            JsonNode tree = jp.readValueAsTree();
+
+            Object deserialized = null;
+            // deserialzie Apple
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Apple.class);
+                GmFruit ret = new GmFruit();
+                ret.setActualInstance(deserialized);
+                return ret;
+            } catch (Exception e) {
+                // deserialization failed, continue, log to help debugging
+                log.log(Level.FINER, "Input data does not match 'GmFruit'", e);
+            }
+
+            // deserialzie Banana
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Banana.class);
+                GmFruit ret = new GmFruit();
+                ret.setActualInstance(deserialized);
+                return ret;
+            } catch (Exception e) {
+                // deserialization failed, continue, log to help debugging
+                log.log(Level.FINER, "Input data does not match 'GmFruit'", e);
+            }
+
+            throw new IOException(String.format("Failed deserialization for GmFruit: no match found"));
+        }
+    }
+
+    // store a list of schema names defined in anyOf
+    public final static Map<String, GenericType> schemas = new HashMap<String, GenericType>();
+
+    public GmFruit() {
+        super("anyOf", Boolean.FALSE);
+    }
+
+    public GmFruit(Apple o) {
+        super("anyOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    public GmFruit(Banana o) {
+        super("anyOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    static {
+        schemas.put("Apple", new GenericType<Apple>() {
+        });
+        schemas.put("Banana", new GenericType<Banana>() {
+        });
+    }
+
+    @Override
+    public Map<String, GenericType> getSchemas() {
+        return GmFruit.schemas;
+    }
+
+    @Override
+    public void setActualInstance(Object instance) {
+        if (instance instanceof Apple) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof Banana) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        throw new RuntimeException("Invalid instance type. Must be Apple, Banana");
+    }
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/GrandparentAnimal.java

@@ -0,0 +1,111 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.ChildCat;
+import org.openapitools.client.model.ParentPet;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * GrandparentAnimal
+ */
+@JsonPropertyOrder({
+  GrandparentAnimal.JSON_PROPERTY_PET_TYPE
+})
+
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "pet_type", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = ChildCat.class, name = "ChildCat"),
+  @JsonSubTypes.Type(value = ParentPet.class, name = "ParentPet"),
+})
+
+public class GrandparentAnimal {
+  public static final String JSON_PROPERTY_PET_TYPE = "pet_type";
+  private String petType;
+
+
+  public GrandparentAnimal petType(String petType) {
+    
+    this.petType = petType;
+    return this;
+  }
+
+   /**
+   * Get petType
+   * @return petType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_PET_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getPetType() {
+    return petType;
+  }
+
+
+  public void setPetType(String petType) {
+    this.petType = petType;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    GrandparentAnimal grandparentAnimal = (GrandparentAnimal) o;
+    return Objects.equals(this.petType, grandparentAnimal.petType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(petType);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class GrandparentAnimal {\n");
+    sb.append("    petType: ").append(toIndentedString(petType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java

@@ -0,0 +1,115 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * HasOnlyReadOnly
+ */
+@JsonPropertyOrder({
+  HasOnlyReadOnly.JSON_PROPERTY_BAR,
+  HasOnlyReadOnly.JSON_PROPERTY_FOO
+})
+
+public class HasOnlyReadOnly {
+  public static final String JSON_PROPERTY_BAR = "bar";
+  private String bar;
+
+  public static final String JSON_PROPERTY_FOO = "foo";
+  private String foo;
+
+
+   /**
+   * Get bar
+   * @return bar
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BAR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBar() {
+    return bar;
+  }
+
+
+
+
+   /**
+   * Get foo
+   * @return foo
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_FOO)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getFoo() {
+    return foo;
+  }
+
+
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    HasOnlyReadOnly hasOnlyReadOnly = (HasOnlyReadOnly) o;
+    return Objects.equals(this.bar, hasOnlyReadOnly.bar) &&
+        Objects.equals(this.foo, hasOnlyReadOnly.foo);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(bar, foo);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class HasOnlyReadOnly {\n");
+    sb.append("    bar: ").append(toIndentedString(bar)).append("\n");
+    sb.append("    foo: ").append(toIndentedString(foo)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/HealthCheckResult.java

@@ -0,0 +1,116 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.util.NoSuchElementException;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Just a string to inform instance is up and running. Make it nullable in hope to get it as pointer in generated model.
+ */
+@ApiModel(description = "Just a string to inform instance is up and running. Make it nullable in hope to get it as pointer in generated model.")
+@JsonPropertyOrder({
+  HealthCheckResult.JSON_PROPERTY_NULLABLE_MESSAGE
+})
+
+public class HealthCheckResult {
+  public static final String JSON_PROPERTY_NULLABLE_MESSAGE = "NullableMessage";
+  private JsonNullable<String> nullableMessage = JsonNullable.<String>undefined();
+
+
+  public HealthCheckResult nullableMessage(String nullableMessage) {
+    this.nullableMessage = JsonNullable.<String>of(nullableMessage);
+    
+    return this;
+  }
+
+   /**
+   * Get nullableMessage
+   * @return nullableMessage
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public String getNullableMessage() {
+        return nullableMessage.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_NULLABLE_MESSAGE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<String> getNullableMessage_JsonNullable() {
+    return nullableMessage;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_NULLABLE_MESSAGE)
+  public void setNullableMessage_JsonNullable(JsonNullable<String> nullableMessage) {
+    this.nullableMessage = nullableMessage;
+  }
+
+  public void setNullableMessage(String nullableMessage) {
+    this.nullableMessage = JsonNullable.<String>of(nullableMessage);
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    HealthCheckResult healthCheckResult = (HealthCheckResult) o;
+    return Objects.equals(this.nullableMessage, healthCheckResult.nullableMessage);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(nullableMessage);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class HealthCheckResult {\n");
+    sb.append("    nullableMessage: ").append(toIndentedString(nullableMessage)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/InlineObject.java

@@ -0,0 +1,133 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * InlineObject
+ */
+@JsonPropertyOrder({
+  InlineObject.JSON_PROPERTY_NAME,
+  InlineObject.JSON_PROPERTY_STATUS
+})
+
+public class InlineObject {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+  public static final String JSON_PROPERTY_STATUS = "status";
+  private String status;
+
+
+  public InlineObject name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Updated name of the pet
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "Updated name of the pet")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  public InlineObject status(String status) {
+    
+    this.status = status;
+    return this;
+  }
+
+   /**
+   * Updated status of the pet
+   * @return status
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "Updated status of the pet")
+  @JsonProperty(JSON_PROPERTY_STATUS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getStatus() {
+    return status;
+  }
+
+
+  public void setStatus(String status) {
+    this.status = status;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    InlineObject inlineObject = (InlineObject) o;
+    return Objects.equals(this.name, inlineObject.name) &&
+        Objects.equals(this.status, inlineObject.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, status);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class InlineObject {\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("    status: ").append(toIndentedString(status)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/InlineObject1.java

@@ -0,0 +1,134 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.File;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * InlineObject1
+ */
+@JsonPropertyOrder({
+  InlineObject1.JSON_PROPERTY_ADDITIONAL_METADATA,
+  InlineObject1.JSON_PROPERTY_FILE
+})
+
+public class InlineObject1 {
+  public static final String JSON_PROPERTY_ADDITIONAL_METADATA = "additionalMetadata";
+  private String additionalMetadata;
+
+  public static final String JSON_PROPERTY_FILE = "file";
+  private File file;
+
+
+  public InlineObject1 additionalMetadata(String additionalMetadata) {
+    
+    this.additionalMetadata = additionalMetadata;
+    return this;
+  }
+
+   /**
+   * Additional data to pass to server
+   * @return additionalMetadata
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "Additional data to pass to server")
+  @JsonProperty(JSON_PROPERTY_ADDITIONAL_METADATA)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getAdditionalMetadata() {
+    return additionalMetadata;
+  }
+
+
+  public void setAdditionalMetadata(String additionalMetadata) {
+    this.additionalMetadata = additionalMetadata;
+  }
+
+
+  public InlineObject1 file(File file) {
+    
+    this.file = file;
+    return this;
+  }
+
+   /**
+   * file to upload
+   * @return file
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "file to upload")
+  @JsonProperty(JSON_PROPERTY_FILE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public File getFile() {
+    return file;
+  }
+
+
+  public void setFile(File file) {
+    this.file = file;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    InlineObject1 inlineObject1 = (InlineObject1) o;
+    return Objects.equals(this.additionalMetadata, inlineObject1.additionalMetadata) &&
+        Objects.equals(this.file, inlineObject1.file);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(additionalMetadata, file);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class InlineObject1 {\n");
+    sb.append("    additionalMetadata: ").append(toIndentedString(additionalMetadata)).append("\n");
+    sb.append("    file: ").append(toIndentedString(file)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/InlineObject2.java

@@ -0,0 +1,215 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * InlineObject2
+ */
+@JsonPropertyOrder({
+  InlineObject2.JSON_PROPERTY_ENUM_FORM_STRING_ARRAY,
+  InlineObject2.JSON_PROPERTY_ENUM_FORM_STRING
+})
+
+public class InlineObject2 {
+  /**
+   * Gets or Sets enumFormStringArray
+   */
+  public enum EnumFormStringArrayEnum {
+    GREATER_THAN(">"),
+    
+    DOLLAR("$");
+
+    private String value;
+
+    EnumFormStringArrayEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static EnumFormStringArrayEnum fromValue(String value) {
+      for (EnumFormStringArrayEnum b : EnumFormStringArrayEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ENUM_FORM_STRING_ARRAY = "enum_form_string_array";
+  private List<EnumFormStringArrayEnum> enumFormStringArray = null;
+
+  /**
+   * Form parameter enum test (string)
+   */
+  public enum EnumFormStringEnum {
+    _ABC("_abc"),
+    
+    _EFG("-efg"),
+    
+    _XYZ_("(xyz)");
+
+    private String value;
+
+    EnumFormStringEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static EnumFormStringEnum fromValue(String value) {
+      for (EnumFormStringEnum b : EnumFormStringEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ENUM_FORM_STRING = "enum_form_string";
+  private EnumFormStringEnum enumFormString = EnumFormStringEnum._EFG;
+
+
+  public InlineObject2 enumFormStringArray(List<EnumFormStringArrayEnum> enumFormStringArray) {
+    
+    this.enumFormStringArray = enumFormStringArray;
+    return this;
+  }
+
+  public InlineObject2 addEnumFormStringArrayItem(EnumFormStringArrayEnum enumFormStringArrayItem) {
+    if (this.enumFormStringArray == null) {
+      this.enumFormStringArray = new ArrayList<>();
+    }
+    this.enumFormStringArray.add(enumFormStringArrayItem);
+    return this;
+  }
+
+   /**
+   * Form parameter enum test (string array)
+   * @return enumFormStringArray
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "Form parameter enum test (string array)")
+  @JsonProperty(JSON_PROPERTY_ENUM_FORM_STRING_ARRAY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<EnumFormStringArrayEnum> getEnumFormStringArray() {
+    return enumFormStringArray;
+  }
+
+
+  public void setEnumFormStringArray(List<EnumFormStringArrayEnum> enumFormStringArray) {
+    this.enumFormStringArray = enumFormStringArray;
+  }
+
+
+  public InlineObject2 enumFormString(EnumFormStringEnum enumFormString) {
+    
+    this.enumFormString = enumFormString;
+    return this;
+  }
+
+   /**
+   * Form parameter enum test (string)
+   * @return enumFormString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "Form parameter enum test (string)")
+  @JsonProperty(JSON_PROPERTY_ENUM_FORM_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public EnumFormStringEnum getEnumFormString() {
+    return enumFormString;
+  }
+
+
+  public void setEnumFormString(EnumFormStringEnum enumFormString) {
+    this.enumFormString = enumFormString;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    InlineObject2 inlineObject2 = (InlineObject2) o;
+    return Objects.equals(this.enumFormStringArray, inlineObject2.enumFormStringArray) &&
+        Objects.equals(this.enumFormString, inlineObject2.enumFormString);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(enumFormStringArray, enumFormString);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class InlineObject2 {\n");
+    sb.append("    enumFormStringArray: ").append(toIndentedString(enumFormStringArray)).append("\n");
+    sb.append("    enumFormString: ").append(toIndentedString(enumFormString)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/InlineObject3.java

@@ -0,0 +1,514 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.File;
+import java.math.BigDecimal;
+import java.time.LocalDate;
+import java.time.OffsetDateTime;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * InlineObject3
+ */
+@JsonPropertyOrder({
+  InlineObject3.JSON_PROPERTY_INTEGER,
+  InlineObject3.JSON_PROPERTY_INT32,
+  InlineObject3.JSON_PROPERTY_INT64,
+  InlineObject3.JSON_PROPERTY_NUMBER,
+  InlineObject3.JSON_PROPERTY_FLOAT,
+  InlineObject3.JSON_PROPERTY_DOUBLE,
+  InlineObject3.JSON_PROPERTY_STRING,
+  InlineObject3.JSON_PROPERTY_PATTERN_WITHOUT_DELIMITER,
+  InlineObject3.JSON_PROPERTY_BYTE,
+  InlineObject3.JSON_PROPERTY_BINARY,
+  InlineObject3.JSON_PROPERTY_DATE,
+  InlineObject3.JSON_PROPERTY_DATE_TIME,
+  InlineObject3.JSON_PROPERTY_PASSWORD,
+  InlineObject3.JSON_PROPERTY_CALLBACK
+})
+
+public class InlineObject3 {
+  public static final String JSON_PROPERTY_INTEGER = "integer";
+  private Integer integer;
+
+  public static final String JSON_PROPERTY_INT32 = "int32";
+  private Integer int32;
+
+  public static final String JSON_PROPERTY_INT64 = "int64";
+  private Long int64;
+
+  public static final String JSON_PROPERTY_NUMBER = "number";
+  private BigDecimal number;
+
+  public static final String JSON_PROPERTY_FLOAT = "float";
+  private Float _float;
+
+  public static final String JSON_PROPERTY_DOUBLE = "double";
+  private Double _double;
+
+  public static final String JSON_PROPERTY_STRING = "string";
+  private String string;
+
+  public static final String JSON_PROPERTY_PATTERN_WITHOUT_DELIMITER = "pattern_without_delimiter";
+  private String patternWithoutDelimiter;
+
+  public static final String JSON_PROPERTY_BYTE = "byte";
+  private byte[] _byte;
+
+  public static final String JSON_PROPERTY_BINARY = "binary";
+  private File binary;
+
+  public static final String JSON_PROPERTY_DATE = "date";
+  private LocalDate date;
+
+  public static final String JSON_PROPERTY_DATE_TIME = "dateTime";
+  private OffsetDateTime dateTime;
+
+  public static final String JSON_PROPERTY_PASSWORD = "password";
+  private String password;
+
+  public static final String JSON_PROPERTY_CALLBACK = "callback";
+  private String callback;
+
+
+  public InlineObject3 integer(Integer integer) {
+    
+    this.integer = integer;
+    return this;
+  }
+
+   /**
+   * None
+   * minimum: 10
+   * maximum: 100
+   * @return integer
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "None")
+  @JsonProperty(JSON_PROPERTY_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getInteger() {
+    return integer;
+  }
+
+
+  public void setInteger(Integer integer) {
+    this.integer = integer;
+  }
+
+
+  public InlineObject3 int32(Integer int32) {
+    
+    this.int32 = int32;
+    return this;
+  }
+
+   /**
+   * None
+   * minimum: 20
+   * maximum: 200
+   * @return int32
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "None")
+  @JsonProperty(JSON_PROPERTY_INT32)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getInt32() {
+    return int32;
+  }
+
+
+  public void setInt32(Integer int32) {
+    this.int32 = int32;
+  }
+
+
+  public InlineObject3 int64(Long int64) {
+    
+    this.int64 = int64;
+    return this;
+  }
+
+   /**
+   * None
+   * @return int64
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "None")
+  @JsonProperty(JSON_PROPERTY_INT64)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getInt64() {
+    return int64;
+  }
+
+
+  public void setInt64(Long int64) {
+    this.int64 = int64;
+  }
+
+
+  public InlineObject3 number(BigDecimal number) {
+    
+    this.number = number;
+    return this;
+  }
+
+   /**
+   * None
+   * minimum: 32.1
+   * maximum: 543.2
+   * @return number
+  **/
+  @ApiModelProperty(required = true, value = "None")
+  @JsonProperty(JSON_PROPERTY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public BigDecimal getNumber() {
+    return number;
+  }
+
+
+  public void setNumber(BigDecimal number) {
+    this.number = number;
+  }
+
+
+  public InlineObject3 _float(Float _float) {
+    
+    this._float = _float;
+    return this;
+  }
+
+   /**
+   * None
+   * maximum: 987.6
+   * @return _float
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "None")
+  @JsonProperty(JSON_PROPERTY_FLOAT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Float getFloat() {
+    return _float;
+  }
+
+
+  public void setFloat(Float _float) {
+    this._float = _float;
+  }
+
+
+  public InlineObject3 _double(Double _double) {
+    
+    this._double = _double;
+    return this;
+  }
+
+   /**
+   * None
+   * minimum: 67.8
+   * maximum: 123.4
+   * @return _double
+  **/
+  @ApiModelProperty(required = true, value = "None")
+  @JsonProperty(JSON_PROPERTY_DOUBLE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public Double getDouble() {
+    return _double;
+  }
+
+
+  public void setDouble(Double _double) {
+    this._double = _double;
+  }
+
+
+  public InlineObject3 string(String string) {
+    
+    this.string = string;
+    return this;
+  }
+
+   /**
+   * None
+   * @return string
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "None")
+  @JsonProperty(JSON_PROPERTY_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getString() {
+    return string;
+  }
+
+
+  public void setString(String string) {
+    this.string = string;
+  }
+
+
+  public InlineObject3 patternWithoutDelimiter(String patternWithoutDelimiter) {
+    
+    this.patternWithoutDelimiter = patternWithoutDelimiter;
+    return this;
+  }
+
+   /**
+   * None
+   * @return patternWithoutDelimiter
+  **/
+  @ApiModelProperty(required = true, value = "None")
+  @JsonProperty(JSON_PROPERTY_PATTERN_WITHOUT_DELIMITER)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getPatternWithoutDelimiter() {
+    return patternWithoutDelimiter;
+  }
+
+
+  public void setPatternWithoutDelimiter(String patternWithoutDelimiter) {
+    this.patternWithoutDelimiter = patternWithoutDelimiter;
+  }
+
+
+  public InlineObject3 _byte(byte[] _byte) {
+    
+    this._byte = _byte;
+    return this;
+  }
+
+   /**
+   * None
+   * @return _byte
+  **/
+  @ApiModelProperty(required = true, value = "None")
+  @JsonProperty(JSON_PROPERTY_BYTE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public byte[] getByte() {
+    return _byte;
+  }
+
+
+  public void setByte(byte[] _byte) {
+    this._byte = _byte;
+  }
+
+
+  public InlineObject3 binary(File binary) {
+    
+    this.binary = binary;
+    return this;
+  }
+
+   /**
+   * None
+   * @return binary
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "None")
+  @JsonProperty(JSON_PROPERTY_BINARY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public File getBinary() {
+    return binary;
+  }
+
+
+  public void setBinary(File binary) {
+    this.binary = binary;
+  }
+
+
+  public InlineObject3 date(LocalDate date) {
+    
+    this.date = date;
+    return this;
+  }
+
+   /**
+   * None
+   * @return date
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "None")
+  @JsonProperty(JSON_PROPERTY_DATE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public LocalDate getDate() {
+    return date;
+  }
+
+
+  public void setDate(LocalDate date) {
+    this.date = date;
+  }
+
+
+  public InlineObject3 dateTime(OffsetDateTime dateTime) {
+    
+    this.dateTime = dateTime;
+    return this;
+  }
+
+   /**
+   * None
+   * @return dateTime
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "None")
+  @JsonProperty(JSON_PROPERTY_DATE_TIME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OffsetDateTime getDateTime() {
+    return dateTime;
+  }
+
+
+  public void setDateTime(OffsetDateTime dateTime) {
+    this.dateTime = dateTime;
+  }
+
+
+  public InlineObject3 password(String password) {
+    
+    this.password = password;
+    return this;
+  }
+
+   /**
+   * None
+   * @return password
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "None")
+  @JsonProperty(JSON_PROPERTY_PASSWORD)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getPassword() {
+    return password;
+  }
+
+
+  public void setPassword(String password) {
+    this.password = password;
+  }
+
+
+  public InlineObject3 callback(String callback) {
+    
+    this.callback = callback;
+    return this;
+  }
+
+   /**
+   * None
+   * @return callback
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "None")
+  @JsonProperty(JSON_PROPERTY_CALLBACK)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getCallback() {
+    return callback;
+  }
+
+
+  public void setCallback(String callback) {
+    this.callback = callback;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    InlineObject3 inlineObject3 = (InlineObject3) o;
+    return Objects.equals(this.integer, inlineObject3.integer) &&
+        Objects.equals(this.int32, inlineObject3.int32) &&
+        Objects.equals(this.int64, inlineObject3.int64) &&
+        Objects.equals(this.number, inlineObject3.number) &&
+        Objects.equals(this._float, inlineObject3._float) &&
+        Objects.equals(this._double, inlineObject3._double) &&
+        Objects.equals(this.string, inlineObject3.string) &&
+        Objects.equals(this.patternWithoutDelimiter, inlineObject3.patternWithoutDelimiter) &&
+        Arrays.equals(this._byte, inlineObject3._byte) &&
+        Objects.equals(this.binary, inlineObject3.binary) &&
+        Objects.equals(this.date, inlineObject3.date) &&
+        Objects.equals(this.dateTime, inlineObject3.dateTime) &&
+        Objects.equals(this.password, inlineObject3.password) &&
+        Objects.equals(this.callback, inlineObject3.callback);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(integer, int32, int64, number, _float, _double, string, patternWithoutDelimiter, Arrays.hashCode(_byte), binary, date, dateTime, password, callback);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class InlineObject3 {\n");
+    sb.append("    integer: ").append(toIndentedString(integer)).append("\n");
+    sb.append("    int32: ").append(toIndentedString(int32)).append("\n");
+    sb.append("    int64: ").append(toIndentedString(int64)).append("\n");
+    sb.append("    number: ").append(toIndentedString(number)).append("\n");
+    sb.append("    _float: ").append(toIndentedString(_float)).append("\n");
+    sb.append("    _double: ").append(toIndentedString(_double)).append("\n");
+    sb.append("    string: ").append(toIndentedString(string)).append("\n");
+    sb.append("    patternWithoutDelimiter: ").append(toIndentedString(patternWithoutDelimiter)).append("\n");
+    sb.append("    _byte: ").append(toIndentedString(_byte)).append("\n");
+    sb.append("    binary: ").append(toIndentedString(binary)).append("\n");
+    sb.append("    date: ").append(toIndentedString(date)).append("\n");
+    sb.append("    dateTime: ").append(toIndentedString(dateTime)).append("\n");
+    sb.append("    password: ").append(toIndentedString(password)).append("\n");
+    sb.append("    callback: ").append(toIndentedString(callback)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/InlineObject4.java

@@ -0,0 +1,131 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * InlineObject4
+ */
+@JsonPropertyOrder({
+  InlineObject4.JSON_PROPERTY_PARAM,
+  InlineObject4.JSON_PROPERTY_PARAM2
+})
+
+public class InlineObject4 {
+  public static final String JSON_PROPERTY_PARAM = "param";
+  private String param;
+
+  public static final String JSON_PROPERTY_PARAM2 = "param2";
+  private String param2;
+
+
+  public InlineObject4 param(String param) {
+    
+    this.param = param;
+    return this;
+  }
+
+   /**
+   * field1
+   * @return param
+  **/
+  @ApiModelProperty(required = true, value = "field1")
+  @JsonProperty(JSON_PROPERTY_PARAM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getParam() {
+    return param;
+  }
+
+
+  public void setParam(String param) {
+    this.param = param;
+  }
+
+
+  public InlineObject4 param2(String param2) {
+    
+    this.param2 = param2;
+    return this;
+  }
+
+   /**
+   * field2
+   * @return param2
+  **/
+  @ApiModelProperty(required = true, value = "field2")
+  @JsonProperty(JSON_PROPERTY_PARAM2)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getParam2() {
+    return param2;
+  }
+
+
+  public void setParam2(String param2) {
+    this.param2 = param2;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    InlineObject4 inlineObject4 = (InlineObject4) o;
+    return Objects.equals(this.param, inlineObject4.param) &&
+        Objects.equals(this.param2, inlineObject4.param2);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(param, param2);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class InlineObject4 {\n");
+    sb.append("    param: ").append(toIndentedString(param)).append("\n");
+    sb.append("    param2: ").append(toIndentedString(param2)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/InlineObject5.java

@@ -0,0 +1,133 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.File;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * InlineObject5
+ */
+@JsonPropertyOrder({
+  InlineObject5.JSON_PROPERTY_ADDITIONAL_METADATA,
+  InlineObject5.JSON_PROPERTY_REQUIRED_FILE
+})
+
+public class InlineObject5 {
+  public static final String JSON_PROPERTY_ADDITIONAL_METADATA = "additionalMetadata";
+  private String additionalMetadata;
+
+  public static final String JSON_PROPERTY_REQUIRED_FILE = "requiredFile";
+  private File requiredFile;
+
+
+  public InlineObject5 additionalMetadata(String additionalMetadata) {
+    
+    this.additionalMetadata = additionalMetadata;
+    return this;
+  }
+
+   /**
+   * Additional data to pass to server
+   * @return additionalMetadata
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "Additional data to pass to server")
+  @JsonProperty(JSON_PROPERTY_ADDITIONAL_METADATA)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getAdditionalMetadata() {
+    return additionalMetadata;
+  }
+
+
+  public void setAdditionalMetadata(String additionalMetadata) {
+    this.additionalMetadata = additionalMetadata;
+  }
+
+
+  public InlineObject5 requiredFile(File requiredFile) {
+    
+    this.requiredFile = requiredFile;
+    return this;
+  }
+
+   /**
+   * file to upload
+   * @return requiredFile
+  **/
+  @ApiModelProperty(required = true, value = "file to upload")
+  @JsonProperty(JSON_PROPERTY_REQUIRED_FILE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public File getRequiredFile() {
+    return requiredFile;
+  }
+
+
+  public void setRequiredFile(File requiredFile) {
+    this.requiredFile = requiredFile;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    InlineObject5 inlineObject5 = (InlineObject5) o;
+    return Objects.equals(this.additionalMetadata, inlineObject5.additionalMetadata) &&
+        Objects.equals(this.requiredFile, inlineObject5.requiredFile);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(additionalMetadata, requiredFile);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class InlineObject5 {\n");
+    sb.append("    additionalMetadata: ").append(toIndentedString(additionalMetadata)).append("\n");
+    sb.append("    requiredFile: ").append(toIndentedString(requiredFile)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/InlineResponseDefault.java

@@ -0,0 +1,103 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Foo;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * InlineResponseDefault
+ */
+@JsonPropertyOrder({
+  InlineResponseDefault.JSON_PROPERTY_STRING
+})
+
+public class InlineResponseDefault {
+  public static final String JSON_PROPERTY_STRING = "string";
+  private Foo string;
+
+
+  public InlineResponseDefault string(Foo string) {
+    
+    this.string = string;
+    return this;
+  }
+
+   /**
+   * Get string
+   * @return string
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Foo getString() {
+    return string;
+  }
+
+
+  public void setString(Foo string) {
+    this.string = string;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    InlineResponseDefault inlineResponseDefault = (InlineResponseDefault) o;
+    return Objects.equals(this.string, inlineResponseDefault.string);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(string);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class InlineResponseDefault {\n");
+    sb.append("    string: ").append(toIndentedString(string)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/IsoscelesTriangle.java

@@ -0,0 +1,133 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.ShapeInterface;
+import org.openapitools.client.model.TriangleInterface;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * IsoscelesTriangle
+ */
+@JsonPropertyOrder({
+  IsoscelesTriangle.JSON_PROPERTY_SHAPE_TYPE,
+  IsoscelesTriangle.JSON_PROPERTY_TRIANGLE_TYPE
+})
+
+public class IsoscelesTriangle {
+  public static final String JSON_PROPERTY_SHAPE_TYPE = "shapeType";
+  private String shapeType;
+
+  public static final String JSON_PROPERTY_TRIANGLE_TYPE = "triangleType";
+  private String triangleType;
+
+
+  public IsoscelesTriangle shapeType(String shapeType) {
+    
+    this.shapeType = shapeType;
+    return this;
+  }
+
+   /**
+   * Get shapeType
+   * @return shapeType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_SHAPE_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getShapeType() {
+    return shapeType;
+  }
+
+
+  public void setShapeType(String shapeType) {
+    this.shapeType = shapeType;
+  }
+
+
+  public IsoscelesTriangle triangleType(String triangleType) {
+    
+    this.triangleType = triangleType;
+    return this;
+  }
+
+   /**
+   * Get triangleType
+   * @return triangleType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_TRIANGLE_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getTriangleType() {
+    return triangleType;
+  }
+
+
+  public void setTriangleType(String triangleType) {
+    this.triangleType = triangleType;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    IsoscelesTriangle isoscelesTriangle = (IsoscelesTriangle) o;
+    return Objects.equals(this.shapeType, isoscelesTriangle.shapeType) &&
+        Objects.equals(this.triangleType, isoscelesTriangle.triangleType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(shapeType, triangleType);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class IsoscelesTriangle {\n");
+    sb.append("    shapeType: ").append(toIndentedString(shapeType)).append("\n");
+    sb.append("    triangleType: ").append(toIndentedString(triangleType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Mammal.java

@@ -0,0 +1,165 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Pig;
+import org.openapitools.client.model.Whale;
+import org.openapitools.client.model.Zebra;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+
+@JsonDeserialize(using=Mammal.MammalDeserializer.class)
+public class Mammal extends AbstractOpenApiSchema {
+    private static final Logger log = Logger.getLogger(Mammal.class.getName());
+
+    public static class MammalDeserializer extends StdDeserializer<Mammal> {
+        public MammalDeserializer() {
+            this(Mammal.class);
+        }
+
+        public MammalDeserializer(Class<?> vc) {
+            super(vc);
+        }
+
+        @Override
+        public Mammal deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+            JsonNode tree = jp.readValueAsTree();
+
+            int match = 0;
+            Object deserialized = null;
+            // deserialize Pig
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Pig.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Pig'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Pig'", e);
+            }
+
+            // deserialize Whale
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Whale.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Whale'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Whale'", e);
+            }
+
+            // deserialize Zebra
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Zebra.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Zebra'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Zebra'", e);
+            }
+
+            if (match == 1) {
+                Mammal ret = new Mammal();
+                ret.setActualInstance(deserialized);
+                return ret;
+            }
+            throw new IOException(String.format("Failed deserialization for Mammal: %d classes match result, expected 1", match));
+        }
+    }
+
+    // store a list of schema names defined in oneOf
+    public final static Map<String, GenericType> schemas = new HashMap<String, GenericType>();
+
+    public Mammal() {
+        super("oneOf", Boolean.FALSE);
+    }
+
+    public Mammal(Pig o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    public Mammal(Whale o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    public Mammal(Zebra o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    static {
+        schemas.put("Pig", new GenericType<Pig>() {
+        });
+        schemas.put("Whale", new GenericType<Whale>() {
+        });
+        schemas.put("Zebra", new GenericType<Zebra>() {
+        });
+    }
+
+    @Override
+    public Map<String, GenericType> getSchemas() {
+        return Mammal.schemas;
+    }
+
+    @Override
+    public void setActualInstance(Object instance) {
+        if (instance instanceof Pig) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof Whale) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof Zebra) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        throw new RuntimeException("Invalid instance type. Must be Pig, Whale, Zebra");
+    }
+
+
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/MapTest.java

@@ -0,0 +1,265 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * MapTest
+ */
+@JsonPropertyOrder({
+  MapTest.JSON_PROPERTY_MAP_MAP_OF_STRING,
+  MapTest.JSON_PROPERTY_MAP_OF_ENUM_STRING,
+  MapTest.JSON_PROPERTY_DIRECT_MAP,
+  MapTest.JSON_PROPERTY_INDIRECT_MAP
+})
+
+public class MapTest {
+  public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
+  private Map<String, Map<String, String>> mapMapOfString = null;
+
+  /**
+   * Gets or Sets inner
+   */
+  public enum InnerEnum {
+    UPPER("UPPER"),
+    
+    LOWER("lower");
+
+    private String value;
+
+    InnerEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static InnerEnum fromValue(String value) {
+      for (InnerEnum b : InnerEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_MAP_OF_ENUM_STRING = "map_of_enum_string";
+  private Map<String, InnerEnum> mapOfEnumString = null;
+
+  public static final String JSON_PROPERTY_DIRECT_MAP = "direct_map";
+  private Map<String, Boolean> directMap = null;
+
+  public static final String JSON_PROPERTY_INDIRECT_MAP = "indirect_map";
+  private Map<String, Boolean> indirectMap = null;
+
+
+  public MapTest mapMapOfString(Map<String, Map<String, String>> mapMapOfString) {
+    
+    this.mapMapOfString = mapMapOfString;
+    return this;
+  }
+
+  public MapTest putMapMapOfStringItem(String key, Map<String, String> mapMapOfStringItem) {
+    if (this.mapMapOfString == null) {
+      this.mapMapOfString = new HashMap<>();
+    }
+    this.mapMapOfString.put(key, mapMapOfStringItem);
+    return this;
+  }
+
+   /**
+   * Get mapMapOfString
+   * @return mapMapOfString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_MAP_OF_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Map<String, String>> getMapMapOfString() {
+    return mapMapOfString;
+  }
+
+
+  public void setMapMapOfString(Map<String, Map<String, String>> mapMapOfString) {
+    this.mapMapOfString = mapMapOfString;
+  }
+
+
+  public MapTest mapOfEnumString(Map<String, InnerEnum> mapOfEnumString) {
+    
+    this.mapOfEnumString = mapOfEnumString;
+    return this;
+  }
+
+  public MapTest putMapOfEnumStringItem(String key, InnerEnum mapOfEnumStringItem) {
+    if (this.mapOfEnumString == null) {
+      this.mapOfEnumString = new HashMap<>();
+    }
+    this.mapOfEnumString.put(key, mapOfEnumStringItem);
+    return this;
+  }
+
+   /**
+   * Get mapOfEnumString
+   * @return mapOfEnumString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_OF_ENUM_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, InnerEnum> getMapOfEnumString() {
+    return mapOfEnumString;
+  }
+
+
+  public void setMapOfEnumString(Map<String, InnerEnum> mapOfEnumString) {
+    this.mapOfEnumString = mapOfEnumString;
+  }
+
+
+  public MapTest directMap(Map<String, Boolean> directMap) {
+    
+    this.directMap = directMap;
+    return this;
+  }
+
+  public MapTest putDirectMapItem(String key, Boolean directMapItem) {
+    if (this.directMap == null) {
+      this.directMap = new HashMap<>();
+    }
+    this.directMap.put(key, directMapItem);
+    return this;
+  }
+
+   /**
+   * Get directMap
+   * @return directMap
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DIRECT_MAP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Boolean> getDirectMap() {
+    return directMap;
+  }
+
+
+  public void setDirectMap(Map<String, Boolean> directMap) {
+    this.directMap = directMap;
+  }
+
+
+  public MapTest indirectMap(Map<String, Boolean> indirectMap) {
+    
+    this.indirectMap = indirectMap;
+    return this;
+  }
+
+  public MapTest putIndirectMapItem(String key, Boolean indirectMapItem) {
+    if (this.indirectMap == null) {
+      this.indirectMap = new HashMap<>();
+    }
+    this.indirectMap.put(key, indirectMapItem);
+    return this;
+  }
+
+   /**
+   * Get indirectMap
+   * @return indirectMap
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_INDIRECT_MAP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Boolean> getIndirectMap() {
+    return indirectMap;
+  }
+
+
+  public void setIndirectMap(Map<String, Boolean> indirectMap) {
+    this.indirectMap = indirectMap;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    MapTest mapTest = (MapTest) o;
+    return Objects.equals(this.mapMapOfString, mapTest.mapMapOfString) &&
+        Objects.equals(this.mapOfEnumString, mapTest.mapOfEnumString) &&
+        Objects.equals(this.directMap, mapTest.directMap) &&
+        Objects.equals(this.indirectMap, mapTest.indirectMap);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(mapMapOfString, mapOfEnumString, directMap, indirectMap);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class MapTest {\n");
+    sb.append("    mapMapOfString: ").append(toIndentedString(mapMapOfString)).append("\n");
+    sb.append("    mapOfEnumString: ").append(toIndentedString(mapOfEnumString)).append("\n");
+    sb.append("    directMap: ").append(toIndentedString(directMap)).append("\n");
+    sb.append("    indirectMap: ").append(toIndentedString(indirectMap)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java

@@ -0,0 +1,178 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.time.OffsetDateTime;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import org.openapitools.client.model.Animal;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * MixedPropertiesAndAdditionalPropertiesClass
+ */
+@JsonPropertyOrder({
+  MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_UUID,
+  MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
+  MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
+})
+
+public class MixedPropertiesAndAdditionalPropertiesClass {
+  public static final String JSON_PROPERTY_UUID = "uuid";
+  private UUID uuid;
+
+  public static final String JSON_PROPERTY_DATE_TIME = "dateTime";
+  private OffsetDateTime dateTime;
+
+  public static final String JSON_PROPERTY_MAP = "map";
+  private Map<String, Animal> map = null;
+
+
+  public MixedPropertiesAndAdditionalPropertiesClass uuid(UUID uuid) {
+    
+    this.uuid = uuid;
+    return this;
+  }
+
+   /**
+   * Get uuid
+   * @return uuid
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_UUID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public UUID getUuid() {
+    return uuid;
+  }
+
+
+  public void setUuid(UUID uuid) {
+    this.uuid = uuid;
+  }
+
+
+  public MixedPropertiesAndAdditionalPropertiesClass dateTime(OffsetDateTime dateTime) {
+    
+    this.dateTime = dateTime;
+    return this;
+  }
+
+   /**
+   * Get dateTime
+   * @return dateTime
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DATE_TIME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OffsetDateTime getDateTime() {
+    return dateTime;
+  }
+
+
+  public void setDateTime(OffsetDateTime dateTime) {
+    this.dateTime = dateTime;
+  }
+
+
+  public MixedPropertiesAndAdditionalPropertiesClass map(Map<String, Animal> map) {
+    
+    this.map = map;
+    return this;
+  }
+
+  public MixedPropertiesAndAdditionalPropertiesClass putMapItem(String key, Animal mapItem) {
+    if (this.map == null) {
+      this.map = new HashMap<>();
+    }
+    this.map.put(key, mapItem);
+    return this;
+  }
+
+   /**
+   * Get map
+   * @return map
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Animal> getMap() {
+    return map;
+  }
+
+
+  public void setMap(Map<String, Animal> map) {
+    this.map = map;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    MixedPropertiesAndAdditionalPropertiesClass mixedPropertiesAndAdditionalPropertiesClass = (MixedPropertiesAndAdditionalPropertiesClass) o;
+    return Objects.equals(this.uuid, mixedPropertiesAndAdditionalPropertiesClass.uuid) &&
+        Objects.equals(this.dateTime, mixedPropertiesAndAdditionalPropertiesClass.dateTime) &&
+        Objects.equals(this.map, mixedPropertiesAndAdditionalPropertiesClass.map);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(uuid, dateTime, map);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class MixedPropertiesAndAdditionalPropertiesClass {\n");
+    sb.append("    uuid: ").append(toIndentedString(uuid)).append("\n");
+    sb.append("    dateTime: ").append(toIndentedString(dateTime)).append("\n");
+    sb.append("    map: ").append(toIndentedString(map)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Model200Response.java

@@ -0,0 +1,134 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Model for testing model name starting with number
+ */
+@ApiModel(description = "Model for testing model name starting with number")
+@JsonPropertyOrder({
+  Model200Response.JSON_PROPERTY_NAME,
+  Model200Response.JSON_PROPERTY_PROPERTY_CLASS
+})
+
+public class Model200Response {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private Integer name;
+
+  public static final String JSON_PROPERTY_PROPERTY_CLASS = "class";
+  private String propertyClass;
+
+
+  public Model200Response name(Integer name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getName() {
+    return name;
+  }
+
+
+  public void setName(Integer name) {
+    this.name = name;
+  }
+
+
+  public Model200Response propertyClass(String propertyClass) {
+    
+    this.propertyClass = propertyClass;
+    return this;
+  }
+
+   /**
+   * Get propertyClass
+   * @return propertyClass
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_PROPERTY_CLASS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getPropertyClass() {
+    return propertyClass;
+  }
+
+
+  public void setPropertyClass(String propertyClass) {
+    this.propertyClass = propertyClass;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Model200Response _200response = (Model200Response) o;
+    return Objects.equals(this.name, _200response.name) &&
+        Objects.equals(this.propertyClass, _200response.propertyClass);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, propertyClass);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Model200Response {\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("    propertyClass: ").append(toIndentedString(propertyClass)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ModelApiResponse.java

@@ -0,0 +1,164 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ModelApiResponse
+ */
+@JsonPropertyOrder({
+  ModelApiResponse.JSON_PROPERTY_CODE,
+  ModelApiResponse.JSON_PROPERTY_TYPE,
+  ModelApiResponse.JSON_PROPERTY_MESSAGE
+})
+
+public class ModelApiResponse {
+  public static final String JSON_PROPERTY_CODE = "code";
+  private Integer code;
+
+  public static final String JSON_PROPERTY_TYPE = "type";
+  private String type;
+
+  public static final String JSON_PROPERTY_MESSAGE = "message";
+  private String message;
+
+
+  public ModelApiResponse code(Integer code) {
+    
+    this.code = code;
+    return this;
+  }
+
+   /**
+   * Get code
+   * @return code
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CODE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getCode() {
+    return code;
+  }
+
+
+  public void setCode(Integer code) {
+    this.code = code;
+  }
+
+
+  public ModelApiResponse type(String type) {
+    
+    this.type = type;
+    return this;
+  }
+
+   /**
+   * Get type
+   * @return type
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_TYPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getType() {
+    return type;
+  }
+
+
+  public void setType(String type) {
+    this.type = type;
+  }
+
+
+  public ModelApiResponse message(String message) {
+    
+    this.message = message;
+    return this;
+  }
+
+   /**
+   * Get message
+   * @return message
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MESSAGE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getMessage() {
+    return message;
+  }
+
+
+  public void setMessage(String message) {
+    this.message = message;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ModelApiResponse _apiResponse = (ModelApiResponse) o;
+    return Objects.equals(this.code, _apiResponse.code) &&
+        Objects.equals(this.type, _apiResponse.type) &&
+        Objects.equals(this.message, _apiResponse.message);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(code, type, message);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ModelApiResponse {\n");
+    sb.append("    code: ").append(toIndentedString(code)).append("\n");
+    sb.append("    type: ").append(toIndentedString(type)).append("\n");
+    sb.append("    message: ").append(toIndentedString(message)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ModelReturn.java

@@ -0,0 +1,103 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Model for testing reserved words
+ */
+@ApiModel(description = "Model for testing reserved words")
+@JsonPropertyOrder({
+  ModelReturn.JSON_PROPERTY_RETURN
+})
+
+public class ModelReturn {
+  public static final String JSON_PROPERTY_RETURN = "return";
+  private Integer _return;
+
+
+  public ModelReturn _return(Integer _return) {
+    
+    this._return = _return;
+    return this;
+  }
+
+   /**
+   * Get _return
+   * @return _return
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_RETURN)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getReturn() {
+    return _return;
+  }
+
+
+  public void setReturn(Integer _return) {
+    this._return = _return;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ModelReturn _return = (ModelReturn) o;
+    return Objects.equals(this._return, _return._return);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(_return);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ModelReturn {\n");
+    sb.append("    _return: ").append(toIndentedString(_return)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Name.java

@@ -0,0 +1,177 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Model for testing model name same as property name
+ */
+@ApiModel(description = "Model for testing model name same as property name")
+@JsonPropertyOrder({
+  Name.JSON_PROPERTY_NAME,
+  Name.JSON_PROPERTY_SNAKE_CASE,
+  Name.JSON_PROPERTY_PROPERTY,
+  Name.JSON_PROPERTY_123NUMBER
+})
+
+public class Name {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private Integer name;
+
+  public static final String JSON_PROPERTY_SNAKE_CASE = "snake_case";
+  private Integer snakeCase;
+
+  public static final String JSON_PROPERTY_PROPERTY = "property";
+  private String property;
+
+  public static final String JSON_PROPERTY_123NUMBER = "123Number";
+  private Integer _123number;
+
+
+  public Name name(Integer name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public Integer getName() {
+    return name;
+  }
+
+
+  public void setName(Integer name) {
+    this.name = name;
+  }
+
+
+   /**
+   * Get snakeCase
+   * @return snakeCase
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SNAKE_CASE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getSnakeCase() {
+    return snakeCase;
+  }
+
+
+
+
+  public Name property(String property) {
+    
+    this.property = property;
+    return this;
+  }
+
+   /**
+   * Get property
+   * @return property
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_PROPERTY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getProperty() {
+    return property;
+  }
+
+
+  public void setProperty(String property) {
+    this.property = property;
+  }
+
+
+   /**
+   * Get _123number
+   * @return _123number
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_123NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer get123number() {
+    return _123number;
+  }
+
+
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Name name = (Name) o;
+    return Objects.equals(this.name, name.name) &&
+        Objects.equals(this.snakeCase, name.snakeCase) &&
+        Objects.equals(this.property, name.property) &&
+        Objects.equals(this._123number, name._123number);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, snakeCase, property, _123number);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Name {\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("    snakeCase: ").append(toIndentedString(snakeCase)).append("\n");
+    sb.append("    property: ").append(toIndentedString(property)).append("\n");
+    sb.append("    _123number: ").append(toIndentedString(_123number)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/NullableClass.java

@@ -0,0 +1,619 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.time.LocalDate;
+import java.time.OffsetDateTime;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.util.NoSuchElementException;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * NullableClass
+ */
+@JsonPropertyOrder({
+  NullableClass.JSON_PROPERTY_INTEGER_PROP,
+  NullableClass.JSON_PROPERTY_NUMBER_PROP,
+  NullableClass.JSON_PROPERTY_BOOLEAN_PROP,
+  NullableClass.JSON_PROPERTY_STRING_PROP,
+  NullableClass.JSON_PROPERTY_DATE_PROP,
+  NullableClass.JSON_PROPERTY_DATETIME_PROP,
+  NullableClass.JSON_PROPERTY_ARRAY_NULLABLE_PROP,
+  NullableClass.JSON_PROPERTY_ARRAY_AND_ITEMS_NULLABLE_PROP,
+  NullableClass.JSON_PROPERTY_ARRAY_ITEMS_NULLABLE,
+  NullableClass.JSON_PROPERTY_OBJECT_NULLABLE_PROP,
+  NullableClass.JSON_PROPERTY_OBJECT_AND_ITEMS_NULLABLE_PROP,
+  NullableClass.JSON_PROPERTY_OBJECT_ITEMS_NULLABLE
+})
+
+public class NullableClass extends HashMap<String, Object> {
+  public static final String JSON_PROPERTY_INTEGER_PROP = "integer_prop";
+  private JsonNullable<Integer> integerProp = JsonNullable.<Integer>undefined();
+
+  public static final String JSON_PROPERTY_NUMBER_PROP = "number_prop";
+  private JsonNullable<BigDecimal> numberProp = JsonNullable.<BigDecimal>undefined();
+
+  public static final String JSON_PROPERTY_BOOLEAN_PROP = "boolean_prop";
+  private JsonNullable<Boolean> booleanProp = JsonNullable.<Boolean>undefined();
+
+  public static final String JSON_PROPERTY_STRING_PROP = "string_prop";
+  private JsonNullable<String> stringProp = JsonNullable.<String>undefined();
+
+  public static final String JSON_PROPERTY_DATE_PROP = "date_prop";
+  private JsonNullable<LocalDate> dateProp = JsonNullable.<LocalDate>undefined();
+
+  public static final String JSON_PROPERTY_DATETIME_PROP = "datetime_prop";
+  private JsonNullable<OffsetDateTime> datetimeProp = JsonNullable.<OffsetDateTime>undefined();
+
+  public static final String JSON_PROPERTY_ARRAY_NULLABLE_PROP = "array_nullable_prop";
+  private JsonNullable<List<Object>> arrayNullableProp = JsonNullable.<List<Object>>undefined();
+
+  public static final String JSON_PROPERTY_ARRAY_AND_ITEMS_NULLABLE_PROP = "array_and_items_nullable_prop";
+  private JsonNullable<List<Object>> arrayAndItemsNullableProp = JsonNullable.<List<Object>>undefined();
+
+  public static final String JSON_PROPERTY_ARRAY_ITEMS_NULLABLE = "array_items_nullable";
+  private List<Object> arrayItemsNullable = null;
+
+  public static final String JSON_PROPERTY_OBJECT_NULLABLE_PROP = "object_nullable_prop";
+  private JsonNullable<Map<String, Object>> objectNullableProp = JsonNullable.<Map<String, Object>>undefined();
+
+  public static final String JSON_PROPERTY_OBJECT_AND_ITEMS_NULLABLE_PROP = "object_and_items_nullable_prop";
+  private JsonNullable<Map<String, Object>> objectAndItemsNullableProp = JsonNullable.<Map<String, Object>>undefined();
+
+  public static final String JSON_PROPERTY_OBJECT_ITEMS_NULLABLE = "object_items_nullable";
+  private Map<String, Object> objectItemsNullable = null;
+
+
+  public NullableClass integerProp(Integer integerProp) {
+    this.integerProp = JsonNullable.<Integer>of(integerProp);
+    
+    return this;
+  }
+
+   /**
+   * Get integerProp
+   * @return integerProp
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public Integer getIntegerProp() {
+        return integerProp.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_INTEGER_PROP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<Integer> getIntegerProp_JsonNullable() {
+    return integerProp;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_INTEGER_PROP)
+  public void setIntegerProp_JsonNullable(JsonNullable<Integer> integerProp) {
+    this.integerProp = integerProp;
+  }
+
+  public void setIntegerProp(Integer integerProp) {
+    this.integerProp = JsonNullable.<Integer>of(integerProp);
+  }
+
+
+  public NullableClass numberProp(BigDecimal numberProp) {
+    this.numberProp = JsonNullable.<BigDecimal>of(numberProp);
+    
+    return this;
+  }
+
+   /**
+   * Get numberProp
+   * @return numberProp
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public BigDecimal getNumberProp() {
+        return numberProp.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_NUMBER_PROP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<BigDecimal> getNumberProp_JsonNullable() {
+    return numberProp;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_NUMBER_PROP)
+  public void setNumberProp_JsonNullable(JsonNullable<BigDecimal> numberProp) {
+    this.numberProp = numberProp;
+  }
+
+  public void setNumberProp(BigDecimal numberProp) {
+    this.numberProp = JsonNullable.<BigDecimal>of(numberProp);
+  }
+
+
+  public NullableClass booleanProp(Boolean booleanProp) {
+    this.booleanProp = JsonNullable.<Boolean>of(booleanProp);
+    
+    return this;
+  }
+
+   /**
+   * Get booleanProp
+   * @return booleanProp
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public Boolean getBooleanProp() {
+        return booleanProp.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_BOOLEAN_PROP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<Boolean> getBooleanProp_JsonNullable() {
+    return booleanProp;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_BOOLEAN_PROP)
+  public void setBooleanProp_JsonNullable(JsonNullable<Boolean> booleanProp) {
+    this.booleanProp = booleanProp;
+  }
+
+  public void setBooleanProp(Boolean booleanProp) {
+    this.booleanProp = JsonNullable.<Boolean>of(booleanProp);
+  }
+
+
+  public NullableClass stringProp(String stringProp) {
+    this.stringProp = JsonNullable.<String>of(stringProp);
+    
+    return this;
+  }
+
+   /**
+   * Get stringProp
+   * @return stringProp
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public String getStringProp() {
+        return stringProp.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_STRING_PROP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<String> getStringProp_JsonNullable() {
+    return stringProp;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_STRING_PROP)
+  public void setStringProp_JsonNullable(JsonNullable<String> stringProp) {
+    this.stringProp = stringProp;
+  }
+
+  public void setStringProp(String stringProp) {
+    this.stringProp = JsonNullable.<String>of(stringProp);
+  }
+
+
+  public NullableClass dateProp(LocalDate dateProp) {
+    this.dateProp = JsonNullable.<LocalDate>of(dateProp);
+    
+    return this;
+  }
+
+   /**
+   * Get dateProp
+   * @return dateProp
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public LocalDate getDateProp() {
+        return dateProp.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_DATE_PROP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<LocalDate> getDateProp_JsonNullable() {
+    return dateProp;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_DATE_PROP)
+  public void setDateProp_JsonNullable(JsonNullable<LocalDate> dateProp) {
+    this.dateProp = dateProp;
+  }
+
+  public void setDateProp(LocalDate dateProp) {
+    this.dateProp = JsonNullable.<LocalDate>of(dateProp);
+  }
+
+
+  public NullableClass datetimeProp(OffsetDateTime datetimeProp) {
+    this.datetimeProp = JsonNullable.<OffsetDateTime>of(datetimeProp);
+    
+    return this;
+  }
+
+   /**
+   * Get datetimeProp
+   * @return datetimeProp
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public OffsetDateTime getDatetimeProp() {
+        return datetimeProp.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_DATETIME_PROP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<OffsetDateTime> getDatetimeProp_JsonNullable() {
+    return datetimeProp;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_DATETIME_PROP)
+  public void setDatetimeProp_JsonNullable(JsonNullable<OffsetDateTime> datetimeProp) {
+    this.datetimeProp = datetimeProp;
+  }
+
+  public void setDatetimeProp(OffsetDateTime datetimeProp) {
+    this.datetimeProp = JsonNullable.<OffsetDateTime>of(datetimeProp);
+  }
+
+
+  public NullableClass arrayNullableProp(List<Object> arrayNullableProp) {
+    this.arrayNullableProp = JsonNullable.<List<Object>>of(arrayNullableProp);
+    
+    return this;
+  }
+
+  public NullableClass addArrayNullablePropItem(Object arrayNullablePropItem) {
+    if (this.arrayNullableProp == null || !this.arrayNullableProp.isPresent()) {
+      this.arrayNullableProp = JsonNullable.<List<Object>>of(new ArrayList<>());
+    }
+    try {
+      this.arrayNullableProp.get().add(arrayNullablePropItem);
+    } catch (java.util.NoSuchElementException e) {
+      // this can never happen, as we make sure above that the value is present
+    }
+    return this;
+  }
+
+   /**
+   * Get arrayNullableProp
+   * @return arrayNullableProp
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public List<Object> getArrayNullableProp() {
+        return arrayNullableProp.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_NULLABLE_PROP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<List<Object>> getArrayNullableProp_JsonNullable() {
+    return arrayNullableProp;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_ARRAY_NULLABLE_PROP)
+  public void setArrayNullableProp_JsonNullable(JsonNullable<List<Object>> arrayNullableProp) {
+    this.arrayNullableProp = arrayNullableProp;
+  }
+
+  public void setArrayNullableProp(List<Object> arrayNullableProp) {
+    this.arrayNullableProp = JsonNullable.<List<Object>>of(arrayNullableProp);
+  }
+
+
+  public NullableClass arrayAndItemsNullableProp(List<Object> arrayAndItemsNullableProp) {
+    this.arrayAndItemsNullableProp = JsonNullable.<List<Object>>of(arrayAndItemsNullableProp);
+    
+    return this;
+  }
+
+  public NullableClass addArrayAndItemsNullablePropItem(Object arrayAndItemsNullablePropItem) {
+    if (this.arrayAndItemsNullableProp == null || !this.arrayAndItemsNullableProp.isPresent()) {
+      this.arrayAndItemsNullableProp = JsonNullable.<List<Object>>of(new ArrayList<>());
+    }
+    try {
+      this.arrayAndItemsNullableProp.get().add(arrayAndItemsNullablePropItem);
+    } catch (java.util.NoSuchElementException e) {
+      // this can never happen, as we make sure above that the value is present
+    }
+    return this;
+  }
+
+   /**
+   * Get arrayAndItemsNullableProp
+   * @return arrayAndItemsNullableProp
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public List<Object> getArrayAndItemsNullableProp() {
+        return arrayAndItemsNullableProp.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_AND_ITEMS_NULLABLE_PROP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<List<Object>> getArrayAndItemsNullableProp_JsonNullable() {
+    return arrayAndItemsNullableProp;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_ARRAY_AND_ITEMS_NULLABLE_PROP)
+  public void setArrayAndItemsNullableProp_JsonNullable(JsonNullable<List<Object>> arrayAndItemsNullableProp) {
+    this.arrayAndItemsNullableProp = arrayAndItemsNullableProp;
+  }
+
+  public void setArrayAndItemsNullableProp(List<Object> arrayAndItemsNullableProp) {
+    this.arrayAndItemsNullableProp = JsonNullable.<List<Object>>of(arrayAndItemsNullableProp);
+  }
+
+
+  public NullableClass arrayItemsNullable(List<Object> arrayItemsNullable) {
+    
+    this.arrayItemsNullable = arrayItemsNullable;
+    return this;
+  }
+
+  public NullableClass addArrayItemsNullableItem(Object arrayItemsNullableItem) {
+    if (this.arrayItemsNullable == null) {
+      this.arrayItemsNullable = new ArrayList<>();
+    }
+    this.arrayItemsNullable.add(arrayItemsNullableItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItemsNullable
+   * @return arrayItemsNullable
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ITEMS_NULLABLE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<Object> getArrayItemsNullable() {
+    return arrayItemsNullable;
+  }
+
+
+  public void setArrayItemsNullable(List<Object> arrayItemsNullable) {
+    this.arrayItemsNullable = arrayItemsNullable;
+  }
+
+
+  public NullableClass objectNullableProp(Map<String, Object> objectNullableProp) {
+    this.objectNullableProp = JsonNullable.<Map<String, Object>>of(objectNullableProp);
+    
+    return this;
+  }
+
+  public NullableClass putObjectNullablePropItem(String key, Object objectNullablePropItem) {
+    if (this.objectNullableProp == null || !this.objectNullableProp.isPresent()) {
+      this.objectNullableProp = JsonNullable.<Map<String, Object>>of(new HashMap<>());
+    }
+    try {
+      this.objectNullableProp.get().put(key, objectNullablePropItem);
+    } catch (java.util.NoSuchElementException e) {
+      // this can never happen, as we make sure above that the value is present
+    }
+    return this;
+  }
+
+   /**
+   * Get objectNullableProp
+   * @return objectNullableProp
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public Map<String, Object> getObjectNullableProp() {
+        return objectNullableProp.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_OBJECT_NULLABLE_PROP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<Map<String, Object>> getObjectNullableProp_JsonNullable() {
+    return objectNullableProp;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_OBJECT_NULLABLE_PROP)
+  public void setObjectNullableProp_JsonNullable(JsonNullable<Map<String, Object>> objectNullableProp) {
+    this.objectNullableProp = objectNullableProp;
+  }
+
+  public void setObjectNullableProp(Map<String, Object> objectNullableProp) {
+    this.objectNullableProp = JsonNullable.<Map<String, Object>>of(objectNullableProp);
+  }
+
+
+  public NullableClass objectAndItemsNullableProp(Map<String, Object> objectAndItemsNullableProp) {
+    this.objectAndItemsNullableProp = JsonNullable.<Map<String, Object>>of(objectAndItemsNullableProp);
+    
+    return this;
+  }
+
+  public NullableClass putObjectAndItemsNullablePropItem(String key, Object objectAndItemsNullablePropItem) {
+    if (this.objectAndItemsNullableProp == null || !this.objectAndItemsNullableProp.isPresent()) {
+      this.objectAndItemsNullableProp = JsonNullable.<Map<String, Object>>of(new HashMap<>());
+    }
+    try {
+      this.objectAndItemsNullableProp.get().put(key, objectAndItemsNullablePropItem);
+    } catch (java.util.NoSuchElementException e) {
+      // this can never happen, as we make sure above that the value is present
+    }
+    return this;
+  }
+
+   /**
+   * Get objectAndItemsNullableProp
+   * @return objectAndItemsNullableProp
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonIgnore
+
+  public Map<String, Object> getObjectAndItemsNullableProp() {
+        return objectAndItemsNullableProp.orElse(null);
+  }
+
+  @JsonProperty(JSON_PROPERTY_OBJECT_AND_ITEMS_NULLABLE_PROP)
+  @JsonInclude(content = JsonInclude.Include.ALWAYS, value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JsonNullable<Map<String, Object>> getObjectAndItemsNullableProp_JsonNullable() {
+    return objectAndItemsNullableProp;
+  }
+  
+  @JsonProperty(JSON_PROPERTY_OBJECT_AND_ITEMS_NULLABLE_PROP)
+  public void setObjectAndItemsNullableProp_JsonNullable(JsonNullable<Map<String, Object>> objectAndItemsNullableProp) {
+    this.objectAndItemsNullableProp = objectAndItemsNullableProp;
+  }
+
+  public void setObjectAndItemsNullableProp(Map<String, Object> objectAndItemsNullableProp) {
+    this.objectAndItemsNullableProp = JsonNullable.<Map<String, Object>>of(objectAndItemsNullableProp);
+  }
+
+
+  public NullableClass objectItemsNullable(Map<String, Object> objectItemsNullable) {
+    
+    this.objectItemsNullable = objectItemsNullable;
+    return this;
+  }
+
+  public NullableClass putObjectItemsNullableItem(String key, Object objectItemsNullableItem) {
+    if (this.objectItemsNullable == null) {
+      this.objectItemsNullable = new HashMap<>();
+    }
+    this.objectItemsNullable.put(key, objectItemsNullableItem);
+    return this;
+  }
+
+   /**
+   * Get objectItemsNullable
+   * @return objectItemsNullable
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_OBJECT_ITEMS_NULLABLE)
+  @JsonInclude(content = JsonInclude.Include.ALWAYS, value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Object> getObjectItemsNullable() {
+    return objectItemsNullable;
+  }
+
+
+  public void setObjectItemsNullable(Map<String, Object> objectItemsNullable) {
+    this.objectItemsNullable = objectItemsNullable;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    NullableClass nullableClass = (NullableClass) o;
+    return Objects.equals(this.integerProp, nullableClass.integerProp) &&
+        Objects.equals(this.numberProp, nullableClass.numberProp) &&
+        Objects.equals(this.booleanProp, nullableClass.booleanProp) &&
+        Objects.equals(this.stringProp, nullableClass.stringProp) &&
+        Objects.equals(this.dateProp, nullableClass.dateProp) &&
+        Objects.equals(this.datetimeProp, nullableClass.datetimeProp) &&
+        Objects.equals(this.arrayNullableProp, nullableClass.arrayNullableProp) &&
+        Objects.equals(this.arrayAndItemsNullableProp, nullableClass.arrayAndItemsNullableProp) &&
+        Objects.equals(this.arrayItemsNullable, nullableClass.arrayItemsNullable) &&
+        Objects.equals(this.objectNullableProp, nullableClass.objectNullableProp) &&
+        Objects.equals(this.objectAndItemsNullableProp, nullableClass.objectAndItemsNullableProp) &&
+        Objects.equals(this.objectItemsNullable, nullableClass.objectItemsNullable) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(integerProp, numberProp, booleanProp, stringProp, dateProp, datetimeProp, arrayNullableProp, arrayAndItemsNullableProp, arrayItemsNullable, objectNullableProp, objectAndItemsNullableProp, objectItemsNullable, super.hashCode());
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class NullableClass {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    integerProp: ").append(toIndentedString(integerProp)).append("\n");
+    sb.append("    numberProp: ").append(toIndentedString(numberProp)).append("\n");
+    sb.append("    booleanProp: ").append(toIndentedString(booleanProp)).append("\n");
+    sb.append("    stringProp: ").append(toIndentedString(stringProp)).append("\n");
+    sb.append("    dateProp: ").append(toIndentedString(dateProp)).append("\n");
+    sb.append("    datetimeProp: ").append(toIndentedString(datetimeProp)).append("\n");
+    sb.append("    arrayNullableProp: ").append(toIndentedString(arrayNullableProp)).append("\n");
+    sb.append("    arrayAndItemsNullableProp: ").append(toIndentedString(arrayAndItemsNullableProp)).append("\n");
+    sb.append("    arrayItemsNullable: ").append(toIndentedString(arrayItemsNullable)).append("\n");
+    sb.append("    objectNullableProp: ").append(toIndentedString(objectNullableProp)).append("\n");
+    sb.append("    objectAndItemsNullableProp: ").append(toIndentedString(objectAndItemsNullableProp)).append("\n");
+    sb.append("    objectItemsNullable: ").append(toIndentedString(objectItemsNullable)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/NullableShape.java

@@ -0,0 +1,142 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Quadrilateral;
+import org.openapitools.client.model.Triangle;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+
+@JsonDeserialize(using=NullableShape.NullableShapeDeserializer.class)
+public class NullableShape extends AbstractOpenApiSchema {
+    private static final Logger log = Logger.getLogger(NullableShape.class.getName());
+
+    public static class NullableShapeDeserializer extends StdDeserializer<NullableShape> {
+        public NullableShapeDeserializer() {
+            this(NullableShape.class);
+        }
+
+        public NullableShapeDeserializer(Class<?> vc) {
+            super(vc);
+        }
+
+        @Override
+        public NullableShape deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+            JsonNode tree = jp.readValueAsTree();
+
+            int match = 0;
+            Object deserialized = null;
+            // deserialize Quadrilateral
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Quadrilateral.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Quadrilateral'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Quadrilateral'", e);
+            }
+
+            // deserialize Triangle
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Triangle.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Triangle'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Triangle'", e);
+            }
+
+            if (match == 1) {
+                NullableShape ret = new NullableShape();
+                ret.setActualInstance(deserialized);
+                return ret;
+            }
+            throw new IOException(String.format("Failed deserialization for NullableShape: %d classes match result, expected 1", match));
+        }
+    }
+
+    // store a list of schema names defined in oneOf
+    public final static Map<String, GenericType> schemas = new HashMap<String, GenericType>();
+
+    public NullableShape() {
+        super("oneOf", Boolean.TRUE);
+    }
+
+    public NullableShape(Quadrilateral o) {
+        super("oneOf", Boolean.TRUE);
+        setActualInstance(o);
+    }
+
+    public NullableShape(Triangle o) {
+        super("oneOf", Boolean.TRUE);
+        setActualInstance(o);
+    }
+
+    static {
+        schemas.put("Quadrilateral", new GenericType<Quadrilateral>() {
+        });
+        schemas.put("Triangle", new GenericType<Triangle>() {
+        });
+    }
+
+    @Override
+    public Map<String, GenericType> getSchemas() {
+        return NullableShape.schemas;
+    }
+
+    @Override
+    public void setActualInstance(Object instance) {
+        if (instance instanceof Quadrilateral) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof Triangle) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        throw new RuntimeException("Invalid instance type. Must be Quadrilateral, Triangle");
+    }
+
+
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/NumberOnly.java

@@ -0,0 +1,103 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * NumberOnly
+ */
+@JsonPropertyOrder({
+  NumberOnly.JSON_PROPERTY_JUST_NUMBER
+})
+
+public class NumberOnly {
+  public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
+  private BigDecimal justNumber;
+
+
+  public NumberOnly justNumber(BigDecimal justNumber) {
+    
+    this.justNumber = justNumber;
+    return this;
+  }
+
+   /**
+   * Get justNumber
+   * @return justNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_JUST_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public BigDecimal getJustNumber() {
+    return justNumber;
+  }
+
+
+  public void setJustNumber(BigDecimal justNumber) {
+    this.justNumber = justNumber;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    NumberOnly numberOnly = (NumberOnly) o;
+    return Objects.equals(this.justNumber, numberOnly.justNumber);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(justNumber);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class NumberOnly {\n");
+    sb.append("    justNumber: ").append(toIndentedString(justNumber)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Order.java

@@ -0,0 +1,295 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.time.OffsetDateTime;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Order
+ */
+@JsonPropertyOrder({
+  Order.JSON_PROPERTY_ID,
+  Order.JSON_PROPERTY_PET_ID,
+  Order.JSON_PROPERTY_QUANTITY,
+  Order.JSON_PROPERTY_SHIP_DATE,
+  Order.JSON_PROPERTY_STATUS,
+  Order.JSON_PROPERTY_COMPLETE
+})
+
+public class Order {
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_PET_ID = "petId";
+  private Long petId;
+
+  public static final String JSON_PROPERTY_QUANTITY = "quantity";
+  private Integer quantity;
+
+  public static final String JSON_PROPERTY_SHIP_DATE = "shipDate";
+  private OffsetDateTime shipDate;
+
+  /**
+   * Order Status
+   */
+  public enum StatusEnum {
+    PLACED("placed"),
+    
+    APPROVED("approved"),
+    
+    DELIVERED("delivered");
+
+    private String value;
+
+    StatusEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static StatusEnum fromValue(String value) {
+      for (StatusEnum b : StatusEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_STATUS = "status";
+  private StatusEnum status;
+
+  public static final String JSON_PROPERTY_COMPLETE = "complete";
+  private Boolean complete = false;
+
+
+  public Order id(Long id) {
+    
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public Order petId(Long petId) {
+    
+    this.petId = petId;
+    return this;
+  }
+
+   /**
+   * Get petId
+   * @return petId
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_PET_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getPetId() {
+    return petId;
+  }
+
+
+  public void setPetId(Long petId) {
+    this.petId = petId;
+  }
+
+
+  public Order quantity(Integer quantity) {
+    
+    this.quantity = quantity;
+    return this;
+  }
+
+   /**
+   * Get quantity
+   * @return quantity
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_QUANTITY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getQuantity() {
+    return quantity;
+  }
+
+
+  public void setQuantity(Integer quantity) {
+    this.quantity = quantity;
+  }
+
+
+  public Order shipDate(OffsetDateTime shipDate) {
+    
+    this.shipDate = shipDate;
+    return this;
+  }
+
+   /**
+   * Get shipDate
+   * @return shipDate
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SHIP_DATE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OffsetDateTime getShipDate() {
+    return shipDate;
+  }
+
+
+  public void setShipDate(OffsetDateTime shipDate) {
+    this.shipDate = shipDate;
+  }
+
+
+  public Order status(StatusEnum status) {
+    
+    this.status = status;
+    return this;
+  }
+
+   /**
+   * Order Status
+   * @return status
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "Order Status")
+  @JsonProperty(JSON_PROPERTY_STATUS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public StatusEnum getStatus() {
+    return status;
+  }
+
+
+  public void setStatus(StatusEnum status) {
+    this.status = status;
+  }
+
+
+  public Order complete(Boolean complete) {
+    
+    this.complete = complete;
+    return this;
+  }
+
+   /**
+   * Get complete
+   * @return complete
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_COMPLETE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Boolean getComplete() {
+    return complete;
+  }
+
+
+  public void setComplete(Boolean complete) {
+    this.complete = complete;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Order order = (Order) o;
+    return Objects.equals(this.id, order.id) &&
+        Objects.equals(this.petId, order.petId) &&
+        Objects.equals(this.quantity, order.quantity) &&
+        Objects.equals(this.shipDate, order.shipDate) &&
+        Objects.equals(this.status, order.status) &&
+        Objects.equals(this.complete, order.complete);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, petId, quantity, shipDate, status, complete);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Order {\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    petId: ").append(toIndentedString(petId)).append("\n");
+    sb.append("    quantity: ").append(toIndentedString(quantity)).append("\n");
+    sb.append("    shipDate: ").append(toIndentedString(shipDate)).append("\n");
+    sb.append("    status: ").append(toIndentedString(status)).append("\n");
+    sb.append("    complete: ").append(toIndentedString(complete)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/OuterComposite.java

@@ -0,0 +1,165 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * OuterComposite
+ */
+@JsonPropertyOrder({
+  OuterComposite.JSON_PROPERTY_MY_NUMBER,
+  OuterComposite.JSON_PROPERTY_MY_STRING,
+  OuterComposite.JSON_PROPERTY_MY_BOOLEAN
+})
+
+public class OuterComposite {
+  public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
+  private BigDecimal myNumber;
+
+  public static final String JSON_PROPERTY_MY_STRING = "my_string";
+  private String myString;
+
+  public static final String JSON_PROPERTY_MY_BOOLEAN = "my_boolean";
+  private Boolean myBoolean;
+
+
+  public OuterComposite myNumber(BigDecimal myNumber) {
+    
+    this.myNumber = myNumber;
+    return this;
+  }
+
+   /**
+   * Get myNumber
+   * @return myNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public BigDecimal getMyNumber() {
+    return myNumber;
+  }
+
+
+  public void setMyNumber(BigDecimal myNumber) {
+    this.myNumber = myNumber;
+  }
+
+
+  public OuterComposite myString(String myString) {
+    
+    this.myString = myString;
+    return this;
+  }
+
+   /**
+   * Get myString
+   * @return myString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MY_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getMyString() {
+    return myString;
+  }
+
+
+  public void setMyString(String myString) {
+    this.myString = myString;
+  }
+
+
+  public OuterComposite myBoolean(Boolean myBoolean) {
+    
+    this.myBoolean = myBoolean;
+    return this;
+  }
+
+   /**
+   * Get myBoolean
+   * @return myBoolean
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MY_BOOLEAN)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Boolean getMyBoolean() {
+    return myBoolean;
+  }
+
+
+  public void setMyBoolean(Boolean myBoolean) {
+    this.myBoolean = myBoolean;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    OuterComposite outerComposite = (OuterComposite) o;
+    return Objects.equals(this.myNumber, outerComposite.myNumber) &&
+        Objects.equals(this.myString, outerComposite.myString) &&
+        Objects.equals(this.myBoolean, outerComposite.myBoolean);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(myNumber, myString, myBoolean);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class OuterComposite {\n");
+    sb.append("    myNumber: ").append(toIndentedString(myNumber)).append("\n");
+    sb.append("    myString: ").append(toIndentedString(myString)).append("\n");
+    sb.append("    myBoolean: ").append(toIndentedString(myBoolean)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/OuterEnum.java

@@ -0,0 +1,60 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Gets or Sets OuterEnum
+ */
+public enum OuterEnum {
+  
+  PLACED("placed"),
+  
+  APPROVED("approved"),
+  
+  DELIVERED("delivered");
+
+  private String value;
+
+  OuterEnum(String value) {
+    this.value = value;
+  }
+
+  @JsonValue
+  public String getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+
+  @JsonCreator
+  public static OuterEnum fromValue(String value) {
+    for (OuterEnum b : OuterEnum.values()) {
+      if (b.value.equals(value)) {
+        return b;
+      }
+    }
+    return null;
+  }
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/OuterEnumDefaultValue.java

@@ -0,0 +1,60 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Gets or Sets OuterEnumDefaultValue
+ */
+public enum OuterEnumDefaultValue {
+  
+  PLACED("placed"),
+  
+  APPROVED("approved"),
+  
+  DELIVERED("delivered");
+
+  private String value;
+
+  OuterEnumDefaultValue(String value) {
+    this.value = value;
+  }
+
+  @JsonValue
+  public String getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+
+  @JsonCreator
+  public static OuterEnumDefaultValue fromValue(String value) {
+    for (OuterEnumDefaultValue b : OuterEnumDefaultValue.values()) {
+      if (b.value.equals(value)) {
+        return b;
+      }
+    }
+    throw new IllegalArgumentException("Unexpected value '" + value + "'");
+  }
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/OuterEnumInteger.java

@@ -0,0 +1,60 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Gets or Sets OuterEnumInteger
+ */
+public enum OuterEnumInteger {
+  
+  NUMBER_0(0),
+  
+  NUMBER_1(1),
+  
+  NUMBER_2(2);
+
+  private Integer value;
+
+  OuterEnumInteger(Integer value) {
+    this.value = value;
+  }
+
+  @JsonValue
+  public Integer getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+
+  @JsonCreator
+  public static OuterEnumInteger fromValue(Integer value) {
+    for (OuterEnumInteger b : OuterEnumInteger.values()) {
+      if (b.value.equals(value)) {
+        return b;
+      }
+    }
+    throw new IllegalArgumentException("Unexpected value '" + value + "'");
+  }
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/OuterEnumIntegerDefaultValue.java

@@ -0,0 +1,60 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Gets or Sets OuterEnumIntegerDefaultValue
+ */
+public enum OuterEnumIntegerDefaultValue {
+  
+  NUMBER_0(0),
+  
+  NUMBER_1(1),
+  
+  NUMBER_2(2);
+
+  private Integer value;
+
+  OuterEnumIntegerDefaultValue(Integer value) {
+    this.value = value;
+  }
+
+  @JsonValue
+  public Integer getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+
+  @JsonCreator
+  public static OuterEnumIntegerDefaultValue fromValue(Integer value) {
+    for (OuterEnumIntegerDefaultValue b : OuterEnumIntegerDefaultValue.values()) {
+      if (b.value.equals(value)) {
+        return b;
+      }
+    }
+    throw new IllegalArgumentException("Unexpected value '" + value + "'");
+  }
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ParentPet.java

@@ -0,0 +1,81 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.ChildCat;
+import org.openapitools.client.model.GrandparentAnimal;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ParentPet
+ */
+@JsonPropertyOrder({
+})
+
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "pet_type", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = ChildCat.class, name = "ChildCat"),
+})
+
+public class ParentPet extends GrandparentAnimal {
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    return super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(super.hashCode());
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ParentPet {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Pet.java

@@ -0,0 +1,309 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.List;
+import org.openapitools.client.model.Category;
+import org.openapitools.client.model.Tag;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Pet
+ */
+@JsonPropertyOrder({
+  Pet.JSON_PROPERTY_ID,
+  Pet.JSON_PROPERTY_CATEGORY,
+  Pet.JSON_PROPERTY_NAME,
+  Pet.JSON_PROPERTY_PHOTO_URLS,
+  Pet.JSON_PROPERTY_TAGS,
+  Pet.JSON_PROPERTY_STATUS
+})
+
+public class Pet {
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_CATEGORY = "category";
+  private Category category;
+
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+  public static final String JSON_PROPERTY_PHOTO_URLS = "photoUrls";
+  private List<String> photoUrls = new ArrayList<>();
+
+  public static final String JSON_PROPERTY_TAGS = "tags";
+  private List<Tag> tags = null;
+
+  /**
+   * pet status in the store
+   */
+  public enum StatusEnum {
+    AVAILABLE("available"),
+    
+    PENDING("pending"),
+    
+    SOLD("sold");
+
+    private String value;
+
+    StatusEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static StatusEnum fromValue(String value) {
+      for (StatusEnum b : StatusEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_STATUS = "status";
+  private StatusEnum status;
+
+
+  public Pet id(Long id) {
+    
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public Pet category(Category category) {
+    
+    this.category = category;
+    return this;
+  }
+
+   /**
+   * Get category
+   * @return category
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CATEGORY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Category getCategory() {
+    return category;
+  }
+
+
+  public void setCategory(Category category) {
+    this.category = category;
+  }
+
+
+  public Pet name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @ApiModelProperty(example = "doggie", required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  public Pet photoUrls(List<String> photoUrls) {
+    
+    this.photoUrls = photoUrls;
+    return this;
+  }
+
+  public Pet addPhotoUrlsItem(String photoUrlsItem) {
+    this.photoUrls.add(photoUrlsItem);
+    return this;
+  }
+
+   /**
+   * Get photoUrls
+   * @return photoUrls
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_PHOTO_URLS)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public List<String> getPhotoUrls() {
+    return photoUrls;
+  }
+
+
+  public void setPhotoUrls(List<String> photoUrls) {
+    this.photoUrls = photoUrls;
+  }
+
+
+  public Pet tags(List<Tag> tags) {
+    
+    this.tags = tags;
+    return this;
+  }
+
+  public Pet addTagsItem(Tag tagsItem) {
+    if (this.tags == null) {
+      this.tags = new ArrayList<>();
+    }
+    this.tags.add(tagsItem);
+    return this;
+  }
+
+   /**
+   * Get tags
+   * @return tags
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_TAGS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<Tag> getTags() {
+    return tags;
+  }
+
+
+  public void setTags(List<Tag> tags) {
+    this.tags = tags;
+  }
+
+
+  public Pet status(StatusEnum status) {
+    
+    this.status = status;
+    return this;
+  }
+
+   /**
+   * pet status in the store
+   * @return status
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "pet status in the store")
+  @JsonProperty(JSON_PROPERTY_STATUS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public StatusEnum getStatus() {
+    return status;
+  }
+
+
+  public void setStatus(StatusEnum status) {
+    this.status = status;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Pet pet = (Pet) o;
+    return Objects.equals(this.id, pet.id) &&
+        Objects.equals(this.category, pet.category) &&
+        Objects.equals(this.name, pet.name) &&
+        Objects.equals(this.photoUrls, pet.photoUrls) &&
+        Objects.equals(this.tags, pet.tags) &&
+        Objects.equals(this.status, pet.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, category, name, photoUrls, tags, status);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Pet {\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    category: ").append(toIndentedString(category)).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("    photoUrls: ").append(toIndentedString(photoUrls)).append("\n");
+    sb.append("    tags: ").append(toIndentedString(tags)).append("\n");
+    sb.append("    status: ").append(toIndentedString(status)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Pig.java

@@ -0,0 +1,142 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.BasquePig;
+import org.openapitools.client.model.DanishPig;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+
+@JsonDeserialize(using=Pig.PigDeserializer.class)
+public class Pig extends AbstractOpenApiSchema {
+    private static final Logger log = Logger.getLogger(Pig.class.getName());
+
+    public static class PigDeserializer extends StdDeserializer<Pig> {
+        public PigDeserializer() {
+            this(Pig.class);
+        }
+
+        public PigDeserializer(Class<?> vc) {
+            super(vc);
+        }
+
+        @Override
+        public Pig deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+            JsonNode tree = jp.readValueAsTree();
+
+            int match = 0;
+            Object deserialized = null;
+            // deserialize BasquePig
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(BasquePig.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'BasquePig'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'BasquePig'", e);
+            }
+
+            // deserialize DanishPig
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(DanishPig.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'DanishPig'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'DanishPig'", e);
+            }
+
+            if (match == 1) {
+                Pig ret = new Pig();
+                ret.setActualInstance(deserialized);
+                return ret;
+            }
+            throw new IOException(String.format("Failed deserialization for Pig: %d classes match result, expected 1", match));
+        }
+    }
+
+    // store a list of schema names defined in oneOf
+    public final static Map<String, GenericType> schemas = new HashMap<String, GenericType>();
+
+    public Pig() {
+        super("oneOf", Boolean.FALSE);
+    }
+
+    public Pig(BasquePig o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    public Pig(DanishPig o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    static {
+        schemas.put("BasquePig", new GenericType<BasquePig>() {
+        });
+        schemas.put("DanishPig", new GenericType<DanishPig>() {
+        });
+    }
+
+    @Override
+    public Map<String, GenericType> getSchemas() {
+        return Pig.schemas;
+    }
+
+    @Override
+    public void setActualInstance(Object instance) {
+        if (instance instanceof BasquePig) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof DanishPig) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        throw new RuntimeException("Invalid instance type. Must be BasquePig, DanishPig");
+    }
+
+
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Quadrilateral.java

@@ -0,0 +1,142 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.ComplexQuadrilateral;
+import org.openapitools.client.model.SimpleQuadrilateral;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+
+@JsonDeserialize(using=Quadrilateral.QuadrilateralDeserializer.class)
+public class Quadrilateral extends AbstractOpenApiSchema {
+    private static final Logger log = Logger.getLogger(Quadrilateral.class.getName());
+
+    public static class QuadrilateralDeserializer extends StdDeserializer<Quadrilateral> {
+        public QuadrilateralDeserializer() {
+            this(Quadrilateral.class);
+        }
+
+        public QuadrilateralDeserializer(Class<?> vc) {
+            super(vc);
+        }
+
+        @Override
+        public Quadrilateral deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+            JsonNode tree = jp.readValueAsTree();
+
+            int match = 0;
+            Object deserialized = null;
+            // deserialize ComplexQuadrilateral
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(ComplexQuadrilateral.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'ComplexQuadrilateral'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'ComplexQuadrilateral'", e);
+            }
+
+            // deserialize SimpleQuadrilateral
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(SimpleQuadrilateral.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'SimpleQuadrilateral'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'SimpleQuadrilateral'", e);
+            }
+
+            if (match == 1) {
+                Quadrilateral ret = new Quadrilateral();
+                ret.setActualInstance(deserialized);
+                return ret;
+            }
+            throw new IOException(String.format("Failed deserialization for Quadrilateral: %d classes match result, expected 1", match));
+        }
+    }
+
+    // store a list of schema names defined in oneOf
+    public final static Map<String, GenericType> schemas = new HashMap<String, GenericType>();
+
+    public Quadrilateral() {
+        super("oneOf", Boolean.FALSE);
+    }
+
+    public Quadrilateral(ComplexQuadrilateral o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    public Quadrilateral(SimpleQuadrilateral o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    static {
+        schemas.put("ComplexQuadrilateral", new GenericType<ComplexQuadrilateral>() {
+        });
+        schemas.put("SimpleQuadrilateral", new GenericType<SimpleQuadrilateral>() {
+        });
+    }
+
+    @Override
+    public Map<String, GenericType> getSchemas() {
+        return Quadrilateral.schemas;
+    }
+
+    @Override
+    public void setActualInstance(Object instance) {
+        if (instance instanceof ComplexQuadrilateral) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof SimpleQuadrilateral) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        throw new RuntimeException("Invalid instance type. Must be ComplexQuadrilateral, SimpleQuadrilateral");
+    }
+
+
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/QuadrilateralInterface.java

@@ -0,0 +1,101 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * QuadrilateralInterface
+ */
+@JsonPropertyOrder({
+  QuadrilateralInterface.JSON_PROPERTY_QUADRILATERAL_TYPE
+})
+
+public class QuadrilateralInterface {
+  public static final String JSON_PROPERTY_QUADRILATERAL_TYPE = "quadrilateralType";
+  private String quadrilateralType;
+
+
+  public QuadrilateralInterface quadrilateralType(String quadrilateralType) {
+    
+    this.quadrilateralType = quadrilateralType;
+    return this;
+  }
+
+   /**
+   * Get quadrilateralType
+   * @return quadrilateralType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_QUADRILATERAL_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getQuadrilateralType() {
+    return quadrilateralType;
+  }
+
+
+  public void setQuadrilateralType(String quadrilateralType) {
+    this.quadrilateralType = quadrilateralType;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    QuadrilateralInterface quadrilateralInterface = (QuadrilateralInterface) o;
+    return Objects.equals(this.quadrilateralType, quadrilateralInterface.quadrilateralType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(quadrilateralType);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class QuadrilateralInterface {\n");
+    sb.append("    quadrilateralType: ").append(toIndentedString(quadrilateralType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java

@@ -0,0 +1,124 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ReadOnlyFirst
+ */
+@JsonPropertyOrder({
+  ReadOnlyFirst.JSON_PROPERTY_BAR,
+  ReadOnlyFirst.JSON_PROPERTY_BAZ
+})
+
+public class ReadOnlyFirst {
+  public static final String JSON_PROPERTY_BAR = "bar";
+  private String bar;
+
+  public static final String JSON_PROPERTY_BAZ = "baz";
+  private String baz;
+
+
+   /**
+   * Get bar
+   * @return bar
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BAR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBar() {
+    return bar;
+  }
+
+
+
+
+  public ReadOnlyFirst baz(String baz) {
+    
+    this.baz = baz;
+    return this;
+  }
+
+   /**
+   * Get baz
+   * @return baz
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BAZ)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBaz() {
+    return baz;
+  }
+
+
+  public void setBaz(String baz) {
+    this.baz = baz;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ReadOnlyFirst readOnlyFirst = (ReadOnlyFirst) o;
+    return Objects.equals(this.bar, readOnlyFirst.bar) &&
+        Objects.equals(this.baz, readOnlyFirst.baz);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(bar, baz);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ReadOnlyFirst {\n");
+    sb.append("    bar: ").append(toIndentedString(bar)).append("\n");
+    sb.append("    baz: ").append(toIndentedString(baz)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ScaleneTriangle.java

@@ -0,0 +1,133 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.ShapeInterface;
+import org.openapitools.client.model.TriangleInterface;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ScaleneTriangle
+ */
+@JsonPropertyOrder({
+  ScaleneTriangle.JSON_PROPERTY_SHAPE_TYPE,
+  ScaleneTriangle.JSON_PROPERTY_TRIANGLE_TYPE
+})
+
+public class ScaleneTriangle {
+  public static final String JSON_PROPERTY_SHAPE_TYPE = "shapeType";
+  private String shapeType;
+
+  public static final String JSON_PROPERTY_TRIANGLE_TYPE = "triangleType";
+  private String triangleType;
+
+
+  public ScaleneTriangle shapeType(String shapeType) {
+    
+    this.shapeType = shapeType;
+    return this;
+  }
+
+   /**
+   * Get shapeType
+   * @return shapeType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_SHAPE_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getShapeType() {
+    return shapeType;
+  }
+
+
+  public void setShapeType(String shapeType) {
+    this.shapeType = shapeType;
+  }
+
+
+  public ScaleneTriangle triangleType(String triangleType) {
+    
+    this.triangleType = triangleType;
+    return this;
+  }
+
+   /**
+   * Get triangleType
+   * @return triangleType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_TRIANGLE_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getTriangleType() {
+    return triangleType;
+  }
+
+
+  public void setTriangleType(String triangleType) {
+    this.triangleType = triangleType;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ScaleneTriangle scaleneTriangle = (ScaleneTriangle) o;
+    return Objects.equals(this.shapeType, scaleneTriangle.shapeType) &&
+        Objects.equals(this.triangleType, scaleneTriangle.triangleType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(shapeType, triangleType);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ScaleneTriangle {\n");
+    sb.append("    shapeType: ").append(toIndentedString(shapeType)).append("\n");
+    sb.append("    triangleType: ").append(toIndentedString(triangleType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Shape.java

@@ -0,0 +1,142 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Quadrilateral;
+import org.openapitools.client.model.Triangle;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+
+@JsonDeserialize(using=Shape.ShapeDeserializer.class)
+public class Shape extends AbstractOpenApiSchema {
+    private static final Logger log = Logger.getLogger(Shape.class.getName());
+
+    public static class ShapeDeserializer extends StdDeserializer<Shape> {
+        public ShapeDeserializer() {
+            this(Shape.class);
+        }
+
+        public ShapeDeserializer(Class<?> vc) {
+            super(vc);
+        }
+
+        @Override
+        public Shape deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+            JsonNode tree = jp.readValueAsTree();
+
+            int match = 0;
+            Object deserialized = null;
+            // deserialize Quadrilateral
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Quadrilateral.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Quadrilateral'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Quadrilateral'", e);
+            }
+
+            // deserialize Triangle
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Triangle.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Triangle'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Triangle'", e);
+            }
+
+            if (match == 1) {
+                Shape ret = new Shape();
+                ret.setActualInstance(deserialized);
+                return ret;
+            }
+            throw new IOException(String.format("Failed deserialization for Shape: %d classes match result, expected 1", match));
+        }
+    }
+
+    // store a list of schema names defined in oneOf
+    public final static Map<String, GenericType> schemas = new HashMap<String, GenericType>();
+
+    public Shape() {
+        super("oneOf", Boolean.FALSE);
+    }
+
+    public Shape(Quadrilateral o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    public Shape(Triangle o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    static {
+        schemas.put("Quadrilateral", new GenericType<Quadrilateral>() {
+        });
+        schemas.put("Triangle", new GenericType<Triangle>() {
+        });
+    }
+
+    @Override
+    public Map<String, GenericType> getSchemas() {
+        return Shape.schemas;
+    }
+
+    @Override
+    public void setActualInstance(Object instance) {
+        if (instance instanceof Quadrilateral) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof Triangle) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        throw new RuntimeException("Invalid instance type. Must be Quadrilateral, Triangle");
+    }
+
+
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ShapeInterface.java

@@ -0,0 +1,101 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ShapeInterface
+ */
+@JsonPropertyOrder({
+  ShapeInterface.JSON_PROPERTY_SHAPE_TYPE
+})
+
+public class ShapeInterface {
+  public static final String JSON_PROPERTY_SHAPE_TYPE = "shapeType";
+  private String shapeType;
+
+
+  public ShapeInterface shapeType(String shapeType) {
+    
+    this.shapeType = shapeType;
+    return this;
+  }
+
+   /**
+   * Get shapeType
+   * @return shapeType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_SHAPE_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getShapeType() {
+    return shapeType;
+  }
+
+
+  public void setShapeType(String shapeType) {
+    this.shapeType = shapeType;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ShapeInterface shapeInterface = (ShapeInterface) o;
+    return Objects.equals(this.shapeType, shapeInterface.shapeType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(shapeType);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ShapeInterface {\n");
+    sb.append("    shapeType: ").append(toIndentedString(shapeType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/ShapeOrNull.java

@@ -0,0 +1,142 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Quadrilateral;
+import org.openapitools.client.model.Triangle;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+
+@JsonDeserialize(using=ShapeOrNull.ShapeOrNullDeserializer.class)
+public class ShapeOrNull extends AbstractOpenApiSchema {
+    private static final Logger log = Logger.getLogger(ShapeOrNull.class.getName());
+
+    public static class ShapeOrNullDeserializer extends StdDeserializer<ShapeOrNull> {
+        public ShapeOrNullDeserializer() {
+            this(ShapeOrNull.class);
+        }
+
+        public ShapeOrNullDeserializer(Class<?> vc) {
+            super(vc);
+        }
+
+        @Override
+        public ShapeOrNull deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+            JsonNode tree = jp.readValueAsTree();
+
+            int match = 0;
+            Object deserialized = null;
+            // deserialize Quadrilateral
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Quadrilateral.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Quadrilateral'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Quadrilateral'", e);
+            }
+
+            // deserialize Triangle
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(Triangle.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'Triangle'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'Triangle'", e);
+            }
+
+            if (match == 1) {
+                ShapeOrNull ret = new ShapeOrNull();
+                ret.setActualInstance(deserialized);
+                return ret;
+            }
+            throw new IOException(String.format("Failed deserialization for ShapeOrNull: %d classes match result, expected 1", match));
+        }
+    }
+
+    // store a list of schema names defined in oneOf
+    public final static Map<String, GenericType> schemas = new HashMap<String, GenericType>();
+
+    public ShapeOrNull() {
+        super("oneOf", Boolean.TRUE);
+    }
+
+    public ShapeOrNull(Quadrilateral o) {
+        super("oneOf", Boolean.TRUE);
+        setActualInstance(o);
+    }
+
+    public ShapeOrNull(Triangle o) {
+        super("oneOf", Boolean.TRUE);
+        setActualInstance(o);
+    }
+
+    static {
+        schemas.put("Quadrilateral", new GenericType<Quadrilateral>() {
+        });
+        schemas.put("Triangle", new GenericType<Triangle>() {
+        });
+    }
+
+    @Override
+    public Map<String, GenericType> getSchemas() {
+        return ShapeOrNull.schemas;
+    }
+
+    @Override
+    public void setActualInstance(Object instance) {
+        if (instance instanceof Quadrilateral) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof Triangle) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        throw new RuntimeException("Invalid instance type. Must be Quadrilateral, Triangle");
+    }
+
+
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/SimpleQuadrilateral.java

@@ -0,0 +1,133 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.QuadrilateralInterface;
+import org.openapitools.client.model.ShapeInterface;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * SimpleQuadrilateral
+ */
+@JsonPropertyOrder({
+  SimpleQuadrilateral.JSON_PROPERTY_SHAPE_TYPE,
+  SimpleQuadrilateral.JSON_PROPERTY_QUADRILATERAL_TYPE
+})
+
+public class SimpleQuadrilateral {
+  public static final String JSON_PROPERTY_SHAPE_TYPE = "shapeType";
+  private String shapeType;
+
+  public static final String JSON_PROPERTY_QUADRILATERAL_TYPE = "quadrilateralType";
+  private String quadrilateralType;
+
+
+  public SimpleQuadrilateral shapeType(String shapeType) {
+    
+    this.shapeType = shapeType;
+    return this;
+  }
+
+   /**
+   * Get shapeType
+   * @return shapeType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_SHAPE_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getShapeType() {
+    return shapeType;
+  }
+
+
+  public void setShapeType(String shapeType) {
+    this.shapeType = shapeType;
+  }
+
+
+  public SimpleQuadrilateral quadrilateralType(String quadrilateralType) {
+    
+    this.quadrilateralType = quadrilateralType;
+    return this;
+  }
+
+   /**
+   * Get quadrilateralType
+   * @return quadrilateralType
+  **/
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_QUADRILATERAL_TYPE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getQuadrilateralType() {
+    return quadrilateralType;
+  }
+
+
+  public void setQuadrilateralType(String quadrilateralType) {
+    this.quadrilateralType = quadrilateralType;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    SimpleQuadrilateral simpleQuadrilateral = (SimpleQuadrilateral) o;
+    return Objects.equals(this.shapeType, simpleQuadrilateral.shapeType) &&
+        Objects.equals(this.quadrilateralType, simpleQuadrilateral.quadrilateralType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(shapeType, quadrilateralType);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class SimpleQuadrilateral {\n");
+    sb.append("    shapeType: ").append(toIndentedString(shapeType)).append("\n");
+    sb.append("    quadrilateralType: ").append(toIndentedString(quadrilateralType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/SpecialModelName.java

@@ -0,0 +1,102 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * SpecialModelName
+ */
+@JsonPropertyOrder({
+  SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
+})
+
+public class SpecialModelName {
+  public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
+  private Long $specialPropertyName;
+
+
+  public SpecialModelName $specialPropertyName(Long $specialPropertyName) {
+    
+    this.$specialPropertyName = $specialPropertyName;
+    return this;
+  }
+
+   /**
+   * Get $specialPropertyName
+   * @return $specialPropertyName
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long get$SpecialPropertyName() {
+    return $specialPropertyName;
+  }
+
+
+  public void set$SpecialPropertyName(Long $specialPropertyName) {
+    this.$specialPropertyName = $specialPropertyName;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    SpecialModelName specialModelName = (SpecialModelName) o;
+    return Objects.equals(this.$specialPropertyName, specialModelName.$specialPropertyName);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash($specialPropertyName);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class SpecialModelName {\n");
+    sb.append("    $specialPropertyName: ").append(toIndentedString($specialPropertyName)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Tag.java

@@ -0,0 +1,133 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Tag
+ */
+@JsonPropertyOrder({
+  Tag.JSON_PROPERTY_ID,
+  Tag.JSON_PROPERTY_NAME
+})
+
+public class Tag {
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public Tag id(Long id) {
+    
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public Tag name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Tag tag = (Tag) o;
+    return Objects.equals(this.id, tag.id) &&
+        Objects.equals(this.name, tag.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
+
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Tag {\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/Triangle.java

@@ -0,0 +1,165 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.EquilateralTriangle;
+import org.openapitools.client.model.IsoscelesTriangle;
+import org.openapitools.client.model.ScaleneTriangle;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+
+@JsonDeserialize(using=Triangle.TriangleDeserializer.class)
+public class Triangle extends AbstractOpenApiSchema {
+    private static final Logger log = Logger.getLogger(Triangle.class.getName());
+
+    public static class TriangleDeserializer extends StdDeserializer<Triangle> {
+        public TriangleDeserializer() {
+            this(Triangle.class);
+        }
+
+        public TriangleDeserializer(Class<?> vc) {
+            super(vc);
+        }
+
+        @Override
+        public Triangle deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+            JsonNode tree = jp.readValueAsTree();
+
+            int match = 0;
+            Object deserialized = null;
+            // deserialize EquilateralTriangle
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(EquilateralTriangle.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'EquilateralTriangle'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'EquilateralTriangle'", e);
+            }
+
+            // deserialize IsoscelesTriangle
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(IsoscelesTriangle.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'IsoscelesTriangle'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'IsoscelesTriangle'", e);
+            }
+
+            // deserialize ScaleneTriangle
+            try {
+                deserialized = tree.traverse(jp.getCodec()).readValueAs(ScaleneTriangle.class);
+                match++;
+                log.log(Level.FINER, "Input data matches schema 'ScaleneTriangle'");
+            } catch (Exception e) {
+                // deserialization failed, continue
+                log.log(Level.FINER, "Input data does not match schema 'ScaleneTriangle'", e);
+            }
+
+            if (match == 1) {
+                Triangle ret = new Triangle();
+                ret.setActualInstance(deserialized);
+                return ret;
+            }
+            throw new IOException(String.format("Failed deserialization for Triangle: %d classes match result, expected 1", match));
+        }
+    }
+
+    // store a list of schema names defined in oneOf
+    public final static Map<String, GenericType> schemas = new HashMap<String, GenericType>();
+
+    public Triangle() {
+        super("oneOf", Boolean.FALSE);
+    }
+
+    public Triangle(EquilateralTriangle o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    public Triangle(IsoscelesTriangle o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    public Triangle(ScaleneTriangle o) {
+        super("oneOf", Boolean.FALSE);
+        setActualInstance(o);
+    }
+
+    static {
+        schemas.put("EquilateralTriangle", new GenericType<EquilateralTriangle>() {
+        });
+        schemas.put("IsoscelesTriangle", new GenericType<IsoscelesTriangle>() {
+        });
+        schemas.put("ScaleneTriangle", new GenericType<ScaleneTriangle>() {
+        });
+    }
+
+    @Override
+    public Map<String, GenericType> getSchemas() {
+        return Triangle.schemas;
+    }
+
+    @Override
+    public void setActualInstance(Object instance) {
+        if (instance instanceof EquilateralTriangle) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof IsoscelesTriangle) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        if (instance instanceof ScaleneTriangle) {
+            super.setActualInstance(instance);
+            return;
+        }
+
+        throw new RuntimeException("Invalid instance type. Must be EquilateralTriangle, IsoscelesTriangle, ScaleneTriangle");
+    }
+
+
+
+}
+