Improve Java native, apache-httpclient with better spec (#14109)

* improve java native, apache client with better spec

* fix java native async tests

* regenerate java native tests

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/api/AnotherFakeApi.java

@@ -78,13 +78,13 @@ public class AnotherFakeApi {
   /**
    * To test special tags
    * To test special tags and operation ID starting with number
-   * @param body client model (required)
+   * @param client client model (required)
    * @return CompletableFuture<Client>
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Client> call123testSpecialTags(Client body) throws ApiException {
+  public CompletableFuture<Client> call123testSpecialTags(Client client) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = call123testSpecialTagsRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = call123testSpecialTagsRequestBuilder(client);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -109,13 +109,13 @@ public class AnotherFakeApi {
   /**
    * To test special tags
    * To test special tags and operation ID starting with number
-   * @param body client model (required)
+   * @param client client model (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Client&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Client>> call123testSpecialTagsWithHttpInfo(Client body) throws ApiException {
+  public CompletableFuture<ApiResponse<Client>> call123testSpecialTagsWithHttpInfo(Client client) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = call123testSpecialTagsRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = call123testSpecialTagsRequestBuilder(client);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -144,10 +144,10 @@ public class AnotherFakeApi {
     }
   }
 
-  private HttpRequest.Builder call123testSpecialTagsRequestBuilder(Client body) throws ApiException {
-    // verify the required parameter 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling call123testSpecialTags");
+  private HttpRequest.Builder call123testSpecialTagsRequestBuilder(Client client) throws ApiException {
+    // verify the required parameter 'client' is set
+    if (client == null) {
+      throw new ApiException(400, "Missing the required parameter 'client' when calling call123testSpecialTags");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -160,7 +160,7 @@ public class AnotherFakeApi {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(client);
       localVarRequestBuilder.method("PATCH", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/api/DefaultApi.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.api;
+
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Pair;
+
+import org.openapitools.client.model.FooGetDefaultResponse;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+
+import java.util.ArrayList;
+import java.util.StringJoiner;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Consumer;
+
+import java.util.concurrent.CompletableFuture;
+
+@javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class DefaultApi {
+  private final HttpClient memberVarHttpClient;
+  private final ObjectMapper memberVarObjectMapper;
+  private final String memberVarBaseUri;
+  private final Consumer<HttpRequest.Builder> memberVarInterceptor;
+  private final Duration memberVarReadTimeout;
+  private final Consumer<HttpResponse<InputStream>> memberVarResponseInterceptor;
+  private final Consumer<HttpResponse<String>> memberVarAsyncResponseInterceptor;
+
+  public DefaultApi() {
+    this(new ApiClient());
+  }
+
+  public DefaultApi(ApiClient apiClient) {
+    memberVarHttpClient = apiClient.getHttpClient();
+    memberVarObjectMapper = apiClient.getObjectMapper();
+    memberVarBaseUri = apiClient.getBaseUri();
+    memberVarInterceptor = apiClient.getRequestInterceptor();
+    memberVarReadTimeout = apiClient.getReadTimeout();
+    memberVarResponseInterceptor = apiClient.getResponseInterceptor();
+    memberVarAsyncResponseInterceptor = apiClient.getAsyncResponseInterceptor();
+  }
+
+  private ApiException getApiException(String operationId, HttpResponse<String> response) {
+    String message = formatExceptionMessage(operationId, response.statusCode(), response.body());
+    return new ApiException(response.statusCode(), message, response.headers(), response.body());
+  }
+
+  private String formatExceptionMessage(String operationId, int statusCode, String body) {
+    if (body == null || body.isEmpty()) {
+      body = "[no body]";
+    }
+    return operationId + " call failed with: " + statusCode + " - " + body;
+  }
+
+  /**
+   * 
+   * 
+   * @return CompletableFuture&lt;FooGetDefaultResponse&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public CompletableFuture<FooGetDefaultResponse> fooGet() throws ApiException {
+    try {
+      HttpRequest.Builder localVarRequestBuilder = fooGetRequestBuilder();
+      return memberVarHttpClient.sendAsync(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
+            if (localVarResponse.statusCode()/ 100 != 2) {
+              return CompletableFuture.failedFuture(getApiException("fooGet", localVarResponse));
+            }
+            try {
+              String responseBody = localVarResponse.body();
+              return CompletableFuture.completedFuture(
+                  responseBody == null || responseBody.isBlank() ? null : memberVarObjectMapper.readValue(responseBody, new TypeReference<FooGetDefaultResponse>() {})
+              );
+            } catch (IOException e) {
+              return CompletableFuture.failedFuture(new ApiException(e));
+            }
+      });
+    }
+    catch (ApiException e) {
+      return CompletableFuture.failedFuture(e);
+    }
+  }
+
+  /**
+   * 
+   * 
+   * @return CompletableFuture&lt;ApiResponse&lt;FooGetDefaultResponse&gt;&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public CompletableFuture<ApiResponse<FooGetDefaultResponse>> fooGetWithHttpInfo() throws ApiException {
+    try {
+      HttpRequest.Builder localVarRequestBuilder = fooGetRequestBuilder();
+      return memberVarHttpClient.sendAsync(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
+            if (memberVarAsyncResponseInterceptor != null) {
+              memberVarAsyncResponseInterceptor.accept(localVarResponse);
+            }
+            if (localVarResponse.statusCode()/ 100 != 2) {
+              return CompletableFuture.failedFuture(getApiException("fooGet", localVarResponse));
+            }
+            try {
+              String responseBody = localVarResponse.body();
+              return CompletableFuture.completedFuture(
+                  new ApiResponse<FooGetDefaultResponse>(
+                      localVarResponse.statusCode(),
+                      localVarResponse.headers().map(),
+                      responseBody == null || responseBody.isBlank() ? null : memberVarObjectMapper.readValue(responseBody, new TypeReference<FooGetDefaultResponse>() {}))
+              );
+            } catch (IOException e) {
+              return CompletableFuture.failedFuture(new ApiException(e));
+            }
+        }
+      );
+    }
+    catch (ApiException e) {
+      return CompletableFuture.failedFuture(e);
+    }
+  }
+
+  private HttpRequest.Builder fooGetRequestBuilder() throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/foo";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    localVarRequestBuilder.header("Accept", "application/json");
+
+    localVarRequestBuilder.method("GET", HttpRequest.BodyPublishers.noBody());
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
+}

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/api/FakeApi.java

@@ -19,13 +19,16 @@ import org.openapitools.client.Pair;
 
 import java.math.BigDecimal;
 import org.openapitools.client.model.Client;
+import org.openapitools.client.model.EnumClass;
 import java.io.File;
 import org.openapitools.client.model.FileSchemaTestClass;
+import org.openapitools.client.model.HealthCheckResult;
 import java.time.LocalDate;
 import java.time.OffsetDateTime;
 import org.openapitools.client.model.OuterComposite;
+import org.openapitools.client.model.OuterObjectWithEnumProperty;
+import org.openapitools.client.model.Pet;
 import org.openapitools.client.model.User;
-import org.openapitools.client.model.XmlItem;
 
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -84,20 +87,108 @@ public class FakeApi {
   }
 
   /**
-   * creates an XmlItem
-   * this route creates an XmlItem
-   * @param xmlItem XmlItem Body (required)
-   * @return CompletableFuture<Void>
+   * Health check endpoint
+   * 
+   * @return CompletableFuture<HealthCheckResult>
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> createXmlItem(XmlItem xmlItem) throws ApiException {
+  public CompletableFuture<HealthCheckResult> fakeHealthGet() throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = createXmlItemRequestBuilder(xmlItem);
+      HttpRequest.Builder localVarRequestBuilder = fakeHealthGetRequestBuilder();
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
             if (localVarResponse.statusCode()/ 100 != 2) {
-              return CompletableFuture.failedFuture(getApiException("createXmlItem", localVarResponse));
+              return CompletableFuture.failedFuture(getApiException("fakeHealthGet", localVarResponse));
+            }
+            try {
+              String responseBody = localVarResponse.body();
+              return CompletableFuture.completedFuture(
+                  responseBody == null || responseBody.isBlank() ? null : memberVarObjectMapper.readValue(responseBody, new TypeReference<HealthCheckResult>() {})
+              );
+            } catch (IOException e) {
+              return CompletableFuture.failedFuture(new ApiException(e));
+            }
+      });
+    }
+    catch (ApiException e) {
+      return CompletableFuture.failedFuture(e);
+    }
+  }
+
+  /**
+   * Health check endpoint
+   * 
+   * @return CompletableFuture&lt;ApiResponse&lt;HealthCheckResult&gt;&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public CompletableFuture<ApiResponse<HealthCheckResult>> fakeHealthGetWithHttpInfo() throws ApiException {
+    try {
+      HttpRequest.Builder localVarRequestBuilder = fakeHealthGetRequestBuilder();
+      return memberVarHttpClient.sendAsync(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
+            if (memberVarAsyncResponseInterceptor != null) {
+              memberVarAsyncResponseInterceptor.accept(localVarResponse);
+            }
+            if (localVarResponse.statusCode()/ 100 != 2) {
+              return CompletableFuture.failedFuture(getApiException("fakeHealthGet", localVarResponse));
+            }
+            try {
+              String responseBody = localVarResponse.body();
+              return CompletableFuture.completedFuture(
+                  new ApiResponse<HealthCheckResult>(
+                      localVarResponse.statusCode(),
+                      localVarResponse.headers().map(),
+                      responseBody == null || responseBody.isBlank() ? null : memberVarObjectMapper.readValue(responseBody, new TypeReference<HealthCheckResult>() {}))
+              );
+            } catch (IOException e) {
+              return CompletableFuture.failedFuture(new ApiException(e));
+            }
+        }
+      );
+    }
+    catch (ApiException e) {
+      return CompletableFuture.failedFuture(e);
+    }
+  }
+
+  private HttpRequest.Builder fakeHealthGetRequestBuilder() throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/fake/health";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    localVarRequestBuilder.header("Accept", "application/json");
+
+    localVarRequestBuilder.method("GET", HttpRequest.BodyPublishers.noBody());
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
+  /**
+   * test http signature authentication
+   * 
+   * @param pet Pet object that needs to be added to the store (required)
+   * @param query1 query parameter (optional)
+   * @param header1 header parameter (optional)
+   * @return CompletableFuture&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public CompletableFuture<Void> fakeHttpSignatureTest(Pet pet, String query1, String header1) throws ApiException {
+    try {
+      HttpRequest.Builder localVarRequestBuilder = fakeHttpSignatureTestRequestBuilder(pet, query1, header1);
+      return memberVarHttpClient.sendAsync(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
+            if (localVarResponse.statusCode()/ 100 != 2) {
+              return CompletableFuture.failedFuture(getApiException("fakeHttpSignatureTest", localVarResponse));
             }
             return CompletableFuture.completedFuture(null);
       });
@@ -108,15 +199,17 @@ public class FakeApi {
   }
 
   /**
-   * creates an XmlItem
-   * this route creates an XmlItem
-   * @param xmlItem XmlItem Body (required)
+   * test http signature authentication
+   * 
+   * @param pet Pet object that needs to be added to the store (required)
+   * @param query1 query parameter (optional)
+   * @param header1 header parameter (optional)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> createXmlItemWithHttpInfo(XmlItem xmlItem) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> fakeHttpSignatureTestWithHttpInfo(Pet pet, String query1, String header1) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = createXmlItemRequestBuilder(xmlItem);
+      HttpRequest.Builder localVarRequestBuilder = fakeHttpSignatureTestRequestBuilder(pet, query1, header1);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -124,7 +217,7 @@ public class FakeApi {
               memberVarAsyncResponseInterceptor.accept(localVarResponse);
             }
             if (localVarResponse.statusCode()/ 100 != 2) {
-              return CompletableFuture.failedFuture(getApiException("createXmlItem", localVarResponse));
+              return CompletableFuture.failedFuture(getApiException("fakeHttpSignatureTest", localVarResponse));
             }
             return CompletableFuture.completedFuture(
                 new ApiResponse<Void>(localVarResponse.statusCode(), localVarResponse.headers().map(), null)
@@ -137,24 +230,36 @@ public class FakeApi {
     }
   }
 
-  private HttpRequest.Builder createXmlItemRequestBuilder(XmlItem xmlItem) throws ApiException {
-    // verify the required parameter 'xmlItem' is set
-    if (xmlItem == null) {
-      throw new ApiException(400, "Missing the required parameter 'xmlItem' when calling createXmlItem");
+  private HttpRequest.Builder fakeHttpSignatureTestRequestBuilder(Pet pet, String query1, String header1) throws ApiException {
+    // verify the required parameter 'pet' is set
+    if (pet == null) {
+      throw new ApiException(400, "Missing the required parameter 'pet' when calling fakeHttpSignatureTest");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
 
-    String localVarPath = "/fake/create_xml_item";
+    String localVarPath = "/fake/http-signature-test";
 
-    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+    List<Pair> localVarQueryParams = new ArrayList<>();
+    localVarQueryParams.addAll(ApiClient.parameterToPairs("query_1", query1));
 
-    localVarRequestBuilder.header("Content-Type", "application/xml");
+    if (!localVarQueryParams.isEmpty()) {
+      StringJoiner queryJoiner = new StringJoiner("&");
+      localVarQueryParams.forEach(p -> queryJoiner.add(p.getName() + '=' + p.getValue()));
+      localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath + '?' + queryJoiner.toString()));
+    } else {
+      localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+    }
+
+    if (header1 != null) {
+      localVarRequestBuilder.header("header_1", header1.toString());
+    }
+    localVarRequestBuilder.header("Content-Type", "application/json");
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(xmlItem);
-      localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(pet);
+      localVarRequestBuilder.method("GET", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);
     }
@@ -263,13 +368,13 @@ public class FakeApi {
   /**
    * 
    * Test serialization of object with outer number type
-   * @param body Input composite as post body (optional)
+   * @param outerComposite Input composite as post body (optional)
    * @return CompletableFuture&lt;OuterComposite&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<OuterComposite> fakeOuterCompositeSerialize(OuterComposite body) throws ApiException {
+  public CompletableFuture<OuterComposite> fakeOuterCompositeSerialize(OuterComposite outerComposite) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = fakeOuterCompositeSerializeRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = fakeOuterCompositeSerializeRequestBuilder(outerComposite);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -294,13 +399,13 @@ public class FakeApi {
   /**
    * 
    * Test serialization of object with outer number type
-   * @param body Input composite as post body (optional)
+   * @param outerComposite Input composite as post body (optional)
    * @return CompletableFuture&lt;ApiResponse&lt;OuterComposite&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<OuterComposite>> fakeOuterCompositeSerializeWithHttpInfo(OuterComposite body) throws ApiException {
+  public CompletableFuture<ApiResponse<OuterComposite>> fakeOuterCompositeSerializeWithHttpInfo(OuterComposite outerComposite) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = fakeOuterCompositeSerializeRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = fakeOuterCompositeSerializeRequestBuilder(outerComposite);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -329,7 +434,7 @@ public class FakeApi {
     }
   }
 
-  private HttpRequest.Builder fakeOuterCompositeSerializeRequestBuilder(OuterComposite body) throws ApiException {
+  private HttpRequest.Builder fakeOuterCompositeSerializeRequestBuilder(OuterComposite outerComposite) throws ApiException {
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
 
@@ -341,7 +446,7 @@ public class FakeApi {
     localVarRequestBuilder.header("Accept", "*/*");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(outerComposite);
       localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);
@@ -539,19 +644,117 @@ public class FakeApi {
   }
   /**
    * 
-   * For this test, the body for this request much reference a schema named &#x60;File&#x60;.
-   * @param body  (required)
-   * @return CompletableFuture&lt;Void&gt;
+   * Test serialization of enum (int) properties with examples
+   * @param outerObjectWithEnumProperty Input enum (int) as post body (required)
+   * @return CompletableFuture&lt;OuterObjectWithEnumProperty&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> testBodyWithFileSchema(FileSchemaTestClass body) throws ApiException {
+  public CompletableFuture<OuterObjectWithEnumProperty> fakePropertyEnumIntegerSerialize(OuterObjectWithEnumProperty outerObjectWithEnumProperty) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testBodyWithFileSchemaRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = fakePropertyEnumIntegerSerializeRequestBuilder(outerObjectWithEnumProperty);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
             if (localVarResponse.statusCode()/ 100 != 2) {
-              return CompletableFuture.failedFuture(getApiException("testBodyWithFileSchema", localVarResponse));
+              return CompletableFuture.failedFuture(getApiException("fakePropertyEnumIntegerSerialize", localVarResponse));
+            }
+            try {
+              String responseBody = localVarResponse.body();
+              return CompletableFuture.completedFuture(
+                  responseBody == null || responseBody.isBlank() ? null : memberVarObjectMapper.readValue(responseBody, new TypeReference<OuterObjectWithEnumProperty>() {})
+              );
+            } catch (IOException e) {
+              return CompletableFuture.failedFuture(new ApiException(e));
+            }
+      });
+    }
+    catch (ApiException e) {
+      return CompletableFuture.failedFuture(e);
+    }
+  }
+
+  /**
+   * 
+   * Test serialization of enum (int) properties with examples
+   * @param outerObjectWithEnumProperty Input enum (int) as post body (required)
+   * @return CompletableFuture&lt;ApiResponse&lt;OuterObjectWithEnumProperty&gt;&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public CompletableFuture<ApiResponse<OuterObjectWithEnumProperty>> fakePropertyEnumIntegerSerializeWithHttpInfo(OuterObjectWithEnumProperty outerObjectWithEnumProperty) throws ApiException {
+    try {
+      HttpRequest.Builder localVarRequestBuilder = fakePropertyEnumIntegerSerializeRequestBuilder(outerObjectWithEnumProperty);
+      return memberVarHttpClient.sendAsync(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
+            if (memberVarAsyncResponseInterceptor != null) {
+              memberVarAsyncResponseInterceptor.accept(localVarResponse);
+            }
+            if (localVarResponse.statusCode()/ 100 != 2) {
+              return CompletableFuture.failedFuture(getApiException("fakePropertyEnumIntegerSerialize", localVarResponse));
+            }
+            try {
+              String responseBody = localVarResponse.body();
+              return CompletableFuture.completedFuture(
+                  new ApiResponse<OuterObjectWithEnumProperty>(
+                      localVarResponse.statusCode(),
+                      localVarResponse.headers().map(),
+                      responseBody == null || responseBody.isBlank() ? null : memberVarObjectMapper.readValue(responseBody, new TypeReference<OuterObjectWithEnumProperty>() {}))
+              );
+            } catch (IOException e) {
+              return CompletableFuture.failedFuture(new ApiException(e));
+            }
+        }
+      );
+    }
+    catch (ApiException e) {
+      return CompletableFuture.failedFuture(e);
+    }
+  }
+
+  private HttpRequest.Builder fakePropertyEnumIntegerSerializeRequestBuilder(OuterObjectWithEnumProperty outerObjectWithEnumProperty) throws ApiException {
+    // verify the required parameter 'outerObjectWithEnumProperty' is set
+    if (outerObjectWithEnumProperty == null) {
+      throw new ApiException(400, "Missing the required parameter 'outerObjectWithEnumProperty' when calling fakePropertyEnumIntegerSerialize");
+    }
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/fake/property/enum-int";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    localVarRequestBuilder.header("Content-Type", "application/json");
+    localVarRequestBuilder.header("Accept", "*/*");
+
+    try {
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(outerObjectWithEnumProperty);
+      localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
+  /**
+   * 
+   * For this test, the body has to be a binary file.
+   * @param body image to upload (required)
+   * @return CompletableFuture&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public CompletableFuture<Void> testBodyWithBinary(File body) throws ApiException {
+    try {
+      HttpRequest.Builder localVarRequestBuilder = testBodyWithBinaryRequestBuilder(body);
+      return memberVarHttpClient.sendAsync(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
+            if (localVarResponse.statusCode()/ 100 != 2) {
+              return CompletableFuture.failedFuture(getApiException("testBodyWithBinary", localVarResponse));
             }
             return CompletableFuture.completedFuture(null);
       });
@@ -563,14 +766,14 @@ public class FakeApi {
 
   /**
    * 
-   * For this test, the body for this request much reference a schema named &#x60;File&#x60;.
-   * @param body  (required)
+   * For this test, the body has to be a binary file.
+   * @param body image to upload (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> testBodyWithFileSchemaWithHttpInfo(FileSchemaTestClass body) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> testBodyWithBinaryWithHttpInfo(File body) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testBodyWithFileSchemaRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = testBodyWithBinaryRequestBuilder(body);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -578,7 +781,7 @@ public class FakeApi {
               memberVarAsyncResponseInterceptor.accept(localVarResponse);
             }
             if (localVarResponse.statusCode()/ 100 != 2) {
-              return CompletableFuture.failedFuture(getApiException("testBodyWithFileSchema", localVarResponse));
+              return CompletableFuture.failedFuture(getApiException("testBodyWithBinary", localVarResponse));
             }
             return CompletableFuture.completedFuture(
                 new ApiResponse<Void>(localVarResponse.statusCode(), localVarResponse.headers().map(), null)
@@ -591,19 +794,19 @@ public class FakeApi {
     }
   }
 
-  private HttpRequest.Builder testBodyWithFileSchemaRequestBuilder(FileSchemaTestClass body) throws ApiException {
+  private HttpRequest.Builder testBodyWithBinaryRequestBuilder(File body) throws ApiException {
     // verify the required parameter 'body' is set
     if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling testBodyWithFileSchema");
+      throw new ApiException(400, "Missing the required parameter 'body' when calling testBodyWithBinary");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
 
-    String localVarPath = "/fake/body-with-file-schema";
+    String localVarPath = "/fake/body-with-binary";
 
     localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
 
-    localVarRequestBuilder.header("Content-Type", "application/json");
+    localVarRequestBuilder.header("Content-Type", "image/png");
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
@@ -622,15 +825,98 @@ public class FakeApi {
   }
   /**
    * 
-   * 
-   * @param query  (required)
-   * @param body  (required)
+   * For this test, the body for this request must reference a schema named &#x60;File&#x60;.
+   * @param fileSchemaTestClass  (required)
    * @return CompletableFuture&lt;Void&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> testBodyWithQueryParams(String query, User body) throws ApiException {
+  public CompletableFuture<Void> testBodyWithFileSchema(FileSchemaTestClass fileSchemaTestClass) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testBodyWithQueryParamsRequestBuilder(query, body);
+      HttpRequest.Builder localVarRequestBuilder = testBodyWithFileSchemaRequestBuilder(fileSchemaTestClass);
+      return memberVarHttpClient.sendAsync(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
+            if (localVarResponse.statusCode()/ 100 != 2) {
+              return CompletableFuture.failedFuture(getApiException("testBodyWithFileSchema", localVarResponse));
+            }
+            return CompletableFuture.completedFuture(null);
+      });
+    }
+    catch (ApiException e) {
+      return CompletableFuture.failedFuture(e);
+    }
+  }
+
+  /**
+   * 
+   * For this test, the body for this request must reference a schema named &#x60;File&#x60;.
+   * @param fileSchemaTestClass  (required)
+   * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public CompletableFuture<ApiResponse<Void>> testBodyWithFileSchemaWithHttpInfo(FileSchemaTestClass fileSchemaTestClass) throws ApiException {
+    try {
+      HttpRequest.Builder localVarRequestBuilder = testBodyWithFileSchemaRequestBuilder(fileSchemaTestClass);
+      return memberVarHttpClient.sendAsync(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
+            if (memberVarAsyncResponseInterceptor != null) {
+              memberVarAsyncResponseInterceptor.accept(localVarResponse);
+            }
+            if (localVarResponse.statusCode()/ 100 != 2) {
+              return CompletableFuture.failedFuture(getApiException("testBodyWithFileSchema", localVarResponse));
+            }
+            return CompletableFuture.completedFuture(
+                new ApiResponse<Void>(localVarResponse.statusCode(), localVarResponse.headers().map(), null)
+            );
+        }
+      );
+    }
+    catch (ApiException e) {
+      return CompletableFuture.failedFuture(e);
+    }
+  }
+
+  private HttpRequest.Builder testBodyWithFileSchemaRequestBuilder(FileSchemaTestClass fileSchemaTestClass) throws ApiException {
+    // verify the required parameter 'fileSchemaTestClass' is set
+    if (fileSchemaTestClass == null) {
+      throw new ApiException(400, "Missing the required parameter 'fileSchemaTestClass' when calling testBodyWithFileSchema");
+    }
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/fake/body-with-file-schema";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    localVarRequestBuilder.header("Content-Type", "application/json");
+    localVarRequestBuilder.header("Accept", "application/json");
+
+    try {
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(fileSchemaTestClass);
+      localVarRequestBuilder.method("PUT", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
+  /**
+   * 
+   * 
+   * @param query  (required)
+   * @param user  (required)
+   * @return CompletableFuture&lt;Void&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public CompletableFuture<Void> testBodyWithQueryParams(String query, User user) throws ApiException {
+    try {
+      HttpRequest.Builder localVarRequestBuilder = testBodyWithQueryParamsRequestBuilder(query, user);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -649,13 +935,13 @@ public class FakeApi {
    * 
    * 
    * @param query  (required)
-   * @param body  (required)
+   * @param user  (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> testBodyWithQueryParamsWithHttpInfo(String query, User body) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> testBodyWithQueryParamsWithHttpInfo(String query, User user) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testBodyWithQueryParamsRequestBuilder(query, body);
+      HttpRequest.Builder localVarRequestBuilder = testBodyWithQueryParamsRequestBuilder(query, user);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -676,14 +962,14 @@ public class FakeApi {
     }
   }
 
-  private HttpRequest.Builder testBodyWithQueryParamsRequestBuilder(String query, User body) throws ApiException {
+  private HttpRequest.Builder testBodyWithQueryParamsRequestBuilder(String query, User user) throws ApiException {
     // verify the required parameter 'query' is set
     if (query == null) {
       throw new ApiException(400, "Missing the required parameter 'query' when calling testBodyWithQueryParams");
     }
-    // verify the required parameter 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling testBodyWithQueryParams");
+    // verify the required parameter 'user' is set
+    if (user == null) {
+      throw new ApiException(400, "Missing the required parameter 'user' when calling testBodyWithQueryParams");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -705,7 +991,7 @@ public class FakeApi {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(user);
       localVarRequestBuilder.method("PUT", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);
@@ -721,13 +1007,13 @@ public class FakeApi {
   /**
    * To test \&quot;client\&quot; model
    * To test \&quot;client\&quot; model
-   * @param body client model (required)
+   * @param client client model (required)
    * @return CompletableFuture&lt;Client&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Client> testClientModel(Client body) throws ApiException {
+  public CompletableFuture<Client> testClientModel(Client client) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testClientModelRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = testClientModelRequestBuilder(client);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -752,13 +1038,13 @@ public class FakeApi {
   /**
    * To test \&quot;client\&quot; model
    * To test \&quot;client\&quot; model
-   * @param body client model (required)
+   * @param client client model (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Client&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Client>> testClientModelWithHttpInfo(Client body) throws ApiException {
+  public CompletableFuture<ApiResponse<Client>> testClientModelWithHttpInfo(Client client) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testClientModelRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = testClientModelRequestBuilder(client);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -787,10 +1073,10 @@ public class FakeApi {
     }
   }
 
-  private HttpRequest.Builder testClientModelRequestBuilder(Client body) throws ApiException {
-    // verify the required parameter 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling testClientModel");
+  private HttpRequest.Builder testClientModelRequestBuilder(Client client) throws ApiException {
+    // verify the required parameter 'client' is set
+    if (client == null) {
+      throw new ApiException(400, "Missing the required parameter 'client' when calling testClientModel");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -803,7 +1089,7 @@ public class FakeApi {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(client);
       localVarRequestBuilder.method("PATCH", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);
@@ -817,8 +1103,8 @@ public class FakeApi {
     return localVarRequestBuilder;
   }
   /**
-   * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
-   * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
+   * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
+   * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
    * @param number None (required)
    * @param _double None (required)
    * @param patternWithoutDelimiter None (required)
@@ -854,8 +1140,8 @@ public class FakeApi {
   }
 
   /**
-   * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
-   * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
+   * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
+   * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
    * @param number None (required)
    * @param _double None (required)
    * @param patternWithoutDelimiter None (required)
@@ -940,14 +1226,15 @@ public class FakeApi {
    * @param enumQueryString Query parameter enum test (string) (optional, default to -efg)
    * @param enumQueryInteger Query parameter enum test (double) (optional)
    * @param enumQueryDouble Query parameter enum test (double) (optional)
+   * @param enumQueryModelArray  (optional
    * @param enumFormStringArray Form parameter enum test (string array) (optional
    * @param enumFormString Form parameter enum test (string) (optional, default to -efg)
    * @return CompletableFuture&lt;Void&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> testEnumParameters(List<String> enumHeaderStringArray, String enumHeaderString, List<String> enumQueryStringArray, String enumQueryString, Integer enumQueryInteger, Double enumQueryDouble, List<String> enumFormStringArray, String enumFormString) throws ApiException {
+  public CompletableFuture<Void> testEnumParameters(List<String> enumHeaderStringArray, String enumHeaderString, List<String> enumQueryStringArray, String enumQueryString, Integer enumQueryInteger, Double enumQueryDouble, List<EnumClass> enumQueryModelArray, List<String> enumFormStringArray, String enumFormString) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testEnumParametersRequestBuilder(enumHeaderStringArray, enumHeaderString, enumQueryStringArray, enumQueryString, enumQueryInteger, enumQueryDouble, enumFormStringArray, enumFormString);
+      HttpRequest.Builder localVarRequestBuilder = testEnumParametersRequestBuilder(enumHeaderStringArray, enumHeaderString, enumQueryStringArray, enumQueryString, enumQueryInteger, enumQueryDouble, enumQueryModelArray, enumFormStringArray, enumFormString);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -971,14 +1258,15 @@ public class FakeApi {
    * @param enumQueryString Query parameter enum test (string) (optional, default to -efg)
    * @param enumQueryInteger Query parameter enum test (double) (optional)
    * @param enumQueryDouble Query parameter enum test (double) (optional)
+   * @param enumQueryModelArray  (optional
    * @param enumFormStringArray Form parameter enum test (string array) (optional
    * @param enumFormString Form parameter enum test (string) (optional, default to -efg)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> testEnumParametersWithHttpInfo(List<String> enumHeaderStringArray, String enumHeaderString, List<String> enumQueryStringArray, String enumQueryString, Integer enumQueryInteger, Double enumQueryDouble, List<String> enumFormStringArray, String enumFormString) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> testEnumParametersWithHttpInfo(List<String> enumHeaderStringArray, String enumHeaderString, List<String> enumQueryStringArray, String enumQueryString, Integer enumQueryInteger, Double enumQueryDouble, List<EnumClass> enumQueryModelArray, List<String> enumFormStringArray, String enumFormString) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testEnumParametersRequestBuilder(enumHeaderStringArray, enumHeaderString, enumQueryStringArray, enumQueryString, enumQueryInteger, enumQueryDouble, enumFormStringArray, enumFormString);
+      HttpRequest.Builder localVarRequestBuilder = testEnumParametersRequestBuilder(enumHeaderStringArray, enumHeaderString, enumQueryStringArray, enumQueryString, enumQueryInteger, enumQueryDouble, enumQueryModelArray, enumFormStringArray, enumFormString);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -999,17 +1287,18 @@ public class FakeApi {
     }
   }
 
-  private HttpRequest.Builder testEnumParametersRequestBuilder(List<String> enumHeaderStringArray, String enumHeaderString, List<String> enumQueryStringArray, String enumQueryString, Integer enumQueryInteger, Double enumQueryDouble, List<String> enumFormStringArray, String enumFormString) throws ApiException {
+  private HttpRequest.Builder testEnumParametersRequestBuilder(List<String> enumHeaderStringArray, String enumHeaderString, List<String> enumQueryStringArray, String enumQueryString, Integer enumQueryInteger, Double enumQueryDouble, List<EnumClass> enumQueryModelArray, List<String> enumFormStringArray, String enumFormString) throws ApiException {
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
 
     String localVarPath = "/fake";
 
     List<Pair> localVarQueryParams = new ArrayList<>();
-    localVarQueryParams.addAll(ApiClient.parameterToPairs("csv", "enum_query_string_array", enumQueryStringArray));
+    localVarQueryParams.addAll(ApiClient.parameterToPairs("multi", "enum_query_string_array", enumQueryStringArray));
     localVarQueryParams.addAll(ApiClient.parameterToPairs("enum_query_string", enumQueryString));
     localVarQueryParams.addAll(ApiClient.parameterToPairs("enum_query_integer", enumQueryInteger));
     localVarQueryParams.addAll(ApiClient.parameterToPairs("enum_query_double", enumQueryDouble));
+    localVarQueryParams.addAll(ApiClient.parameterToPairs("multi", "enum_query_model_array", enumQueryModelArray));
 
     if (!localVarQueryParams.isEmpty()) {
       StringJoiner queryJoiner = new StringJoiner("&");
@@ -1263,13 +1552,13 @@ public class FakeApi {
   /**
    * test inline additionalProperties
    * 
-   * @param param request body (required)
+   * @param requestBody request body (required)
    * @return CompletableFuture&lt;Void&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> testInlineAdditionalProperties(Map<String, String> param) throws ApiException {
+  public CompletableFuture<Void> testInlineAdditionalProperties(Map<String, String> requestBody) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testInlineAdditionalPropertiesRequestBuilder(param);
+      HttpRequest.Builder localVarRequestBuilder = testInlineAdditionalPropertiesRequestBuilder(requestBody);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -1287,13 +1576,13 @@ public class FakeApi {
   /**
    * test inline additionalProperties
    * 
-   * @param param request body (required)
+   * @param requestBody request body (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> testInlineAdditionalPropertiesWithHttpInfo(Map<String, String> param) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> testInlineAdditionalPropertiesWithHttpInfo(Map<String, String> requestBody) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testInlineAdditionalPropertiesRequestBuilder(param);
+      HttpRequest.Builder localVarRequestBuilder = testInlineAdditionalPropertiesRequestBuilder(requestBody);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -1314,10 +1603,10 @@ public class FakeApi {
     }
   }
 
-  private HttpRequest.Builder testInlineAdditionalPropertiesRequestBuilder(Map<String, String> param) throws ApiException {
-    // verify the required parameter 'param' is set
-    if (param == null) {
-      throw new ApiException(400, "Missing the required parameter 'param' when calling testInlineAdditionalProperties");
+  private HttpRequest.Builder testInlineAdditionalPropertiesRequestBuilder(Map<String, String> requestBody) throws ApiException {
+    // verify the required parameter 'requestBody' is set
+    if (requestBody == null) {
+      throw new ApiException(400, "Missing the required parameter 'requestBody' when calling testInlineAdditionalProperties");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -1330,7 +1619,7 @@ public class FakeApi {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(param);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(requestBody);
       localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);
@@ -1434,12 +1723,14 @@ public class FakeApi {
    * @param http  (required)
    * @param url  (required)
    * @param context  (required)
+   * @param allowEmpty  (required)
+   * @param language  (optional
    * @return CompletableFuture&lt;Void&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> testQueryParameterCollectionFormat(List<String> pipe, List<String> ioutil, List<String> http, List<String> url, List<String> context) throws ApiException {
+  public CompletableFuture<Void> testQueryParameterCollectionFormat(List<String> pipe, List<String> ioutil, List<String> http, List<String> url, List<String> context, String allowEmpty, Map<String, String> language) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testQueryParameterCollectionFormatRequestBuilder(pipe, ioutil, http, url, context);
+      HttpRequest.Builder localVarRequestBuilder = testQueryParameterCollectionFormatRequestBuilder(pipe, ioutil, http, url, context, allowEmpty, language);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -1462,12 +1753,14 @@ public class FakeApi {
    * @param http  (required)
    * @param url  (required)
    * @param context  (required)
+   * @param allowEmpty  (required)
+   * @param language  (optional
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> testQueryParameterCollectionFormatWithHttpInfo(List<String> pipe, List<String> ioutil, List<String> http, List<String> url, List<String> context) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> testQueryParameterCollectionFormatWithHttpInfo(List<String> pipe, List<String> ioutil, List<String> http, List<String> url, List<String> context, String allowEmpty, Map<String, String> language) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testQueryParameterCollectionFormatRequestBuilder(pipe, ioutil, http, url, context);
+      HttpRequest.Builder localVarRequestBuilder = testQueryParameterCollectionFormatRequestBuilder(pipe, ioutil, http, url, context, allowEmpty, language);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -1488,7 +1781,7 @@ public class FakeApi {
     }
   }
 
-  private HttpRequest.Builder testQueryParameterCollectionFormatRequestBuilder(List<String> pipe, List<String> ioutil, List<String> http, List<String> url, List<String> context) throws ApiException {
+  private HttpRequest.Builder testQueryParameterCollectionFormatRequestBuilder(List<String> pipe, List<String> ioutil, List<String> http, List<String> url, List<String> context, String allowEmpty, Map<String, String> language) throws ApiException {
     // verify the required parameter 'pipe' is set
     if (pipe == null) {
       throw new ApiException(400, "Missing the required parameter 'pipe' when calling testQueryParameterCollectionFormat");
@@ -1509,17 +1802,23 @@ public class FakeApi {
     if (context == null) {
       throw new ApiException(400, "Missing the required parameter 'context' when calling testQueryParameterCollectionFormat");
     }
+    // verify the required parameter 'allowEmpty' is set
+    if (allowEmpty == null) {
+      throw new ApiException(400, "Missing the required parameter 'allowEmpty' when calling testQueryParameterCollectionFormat");
+    }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
 
     String localVarPath = "/fake/test-query-parameters";
 
     List<Pair> localVarQueryParams = new ArrayList<>();
-    localVarQueryParams.addAll(ApiClient.parameterToPairs("csv", "pipe", pipe));
+    localVarQueryParams.addAll(ApiClient.parameterToPairs("pipes", "pipe", pipe));
     localVarQueryParams.addAll(ApiClient.parameterToPairs("csv", "ioutil", ioutil));
     localVarQueryParams.addAll(ApiClient.parameterToPairs("ssv", "http", http));
     localVarQueryParams.addAll(ApiClient.parameterToPairs("csv", "url", url));
     localVarQueryParams.addAll(ApiClient.parameterToPairs("multi", "context", context));
+    localVarQueryParams.addAll(ApiClient.parameterToPairs("language", language));
+    localVarQueryParams.addAll(ApiClient.parameterToPairs("allowEmpty", allowEmpty));
 
     if (!localVarQueryParams.isEmpty()) {
       StringJoiner queryJoiner = new StringJoiner("&");

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java

@@ -78,13 +78,13 @@ public class FakeClassnameTags123Api {
   /**
    * To test class name in snake case
    * To test class name in snake case
-   * @param body client model (required)
+   * @param client client model (required)
    * @return CompletableFuture<Client>
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Client> testClassname(Client body) throws ApiException {
+  public CompletableFuture<Client> testClassname(Client client) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testClassnameRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = testClassnameRequestBuilder(client);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -109,13 +109,13 @@ public class FakeClassnameTags123Api {
   /**
    * To test class name in snake case
    * To test class name in snake case
-   * @param body client model (required)
+   * @param client client model (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Client&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Client>> testClassnameWithHttpInfo(Client body) throws ApiException {
+  public CompletableFuture<ApiResponse<Client>> testClassnameWithHttpInfo(Client client) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = testClassnameRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = testClassnameRequestBuilder(client);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -144,10 +144,10 @@ public class FakeClassnameTags123Api {
     }
   }
 
-  private HttpRequest.Builder testClassnameRequestBuilder(Client body) throws ApiException {
-    // verify the required parameter 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling testClassname");
+  private HttpRequest.Builder testClassnameRequestBuilder(Client client) throws ApiException {
+    // verify the required parameter 'client' is set
+    if (client == null) {
+      throw new ApiException(400, "Missing the required parameter 'client' when calling testClassname");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -160,7 +160,7 @@ public class FakeClassnameTags123Api {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(client);
       localVarRequestBuilder.method("PATCH", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/api/PetApi.java

@@ -81,13 +81,13 @@ public class PetApi {
   /**
    * Add a new pet to the store
    * 
-   * @param body Pet object that needs to be added to the store (required)
+   * @param pet Pet object that needs to be added to the store (required)
    * @return CompletableFuture<Void>
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> addPet(Pet body) throws ApiException {
+  public CompletableFuture<Void> addPet(Pet pet) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = addPetRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = addPetRequestBuilder(pet);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -105,13 +105,13 @@ public class PetApi {
   /**
    * Add a new pet to the store
    * 
-   * @param body Pet object that needs to be added to the store (required)
+   * @param pet Pet object that needs to be added to the store (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> addPetWithHttpInfo(Pet body) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> addPetWithHttpInfo(Pet pet) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = addPetRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = addPetRequestBuilder(pet);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -132,10 +132,10 @@ public class PetApi {
     }
   }
 
-  private HttpRequest.Builder addPetRequestBuilder(Pet body) throws ApiException {
-    // verify the required parameter 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling addPet");
+  private HttpRequest.Builder addPetRequestBuilder(Pet pet) throws ApiException {
+    // verify the required parameter 'pet' is set
+    if (pet == null) {
+      throw new ApiException(400, "Missing the required parameter 'pet' when calling addPet");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -148,7 +148,7 @@ public class PetApi {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(pet);
       localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);
@@ -546,13 +546,13 @@ public class PetApi {
   /**
    * Update an existing pet
    * 
-   * @param body Pet object that needs to be added to the store (required)
+   * @param pet Pet object that needs to be added to the store (required)
    * @return CompletableFuture&lt;Void&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> updatePet(Pet body) throws ApiException {
+  public CompletableFuture<Void> updatePet(Pet pet) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = updatePetRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = updatePetRequestBuilder(pet);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -570,13 +570,13 @@ public class PetApi {
   /**
    * Update an existing pet
    * 
-   * @param body Pet object that needs to be added to the store (required)
+   * @param pet Pet object that needs to be added to the store (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> updatePetWithHttpInfo(Pet body) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> updatePetWithHttpInfo(Pet pet) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = updatePetRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = updatePetRequestBuilder(pet);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -597,10 +597,10 @@ public class PetApi {
     }
   }
 
-  private HttpRequest.Builder updatePetRequestBuilder(Pet body) throws ApiException {
-    // verify the required parameter 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling updatePet");
+  private HttpRequest.Builder updatePetRequestBuilder(Pet pet) throws ApiException {
+    // verify the required parameter 'pet' is set
+    if (pet == null) {
+      throw new ApiException(400, "Missing the required parameter 'pet' when calling updatePet");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -613,7 +613,7 @@ public class PetApi {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(pet);
       localVarRequestBuilder.method("PUT", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/api/StoreApi.java

@@ -335,13 +335,13 @@ public class StoreApi {
   /**
    * Place an order for a pet
    * 
-   * @param body order placed for purchasing the pet (required)
+   * @param order order placed for purchasing the pet (required)
    * @return CompletableFuture<Order>
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Order> placeOrder(Order body) throws ApiException {
+  public CompletableFuture<Order> placeOrder(Order order) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = placeOrderRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = placeOrderRequestBuilder(order);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -366,13 +366,13 @@ public class StoreApi {
   /**
    * Place an order for a pet
    * 
-   * @param body order placed for purchasing the pet (required)
+   * @param order order placed for purchasing the pet (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Order&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Order>> placeOrderWithHttpInfo(Order body) throws ApiException {
+  public CompletableFuture<ApiResponse<Order>> placeOrderWithHttpInfo(Order order) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = placeOrderRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = placeOrderRequestBuilder(order);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -401,10 +401,10 @@ public class StoreApi {
     }
   }
 
-  private HttpRequest.Builder placeOrderRequestBuilder(Order body) throws ApiException {
-    // verify the required parameter 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling placeOrder");
+  private HttpRequest.Builder placeOrderRequestBuilder(Order order) throws ApiException {
+    // verify the required parameter 'order' is set
+    if (order == null) {
+      throw new ApiException(400, "Missing the required parameter 'order' when calling placeOrder");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -417,7 +417,7 @@ public class StoreApi {
     localVarRequestBuilder.header("Accept", "application/xml, application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(order);
       localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/api/UserApi.java

@@ -79,13 +79,13 @@ public class UserApi {
   /**
    * Create user
    * This can only be done by the logged in user.
-   * @param body Created user object (required)
+   * @param user Created user object (required)
    * @return CompletableFuture<Void>
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> createUser(User body) throws ApiException {
+  public CompletableFuture<Void> createUser(User user) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = createUserRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = createUserRequestBuilder(user);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -103,13 +103,13 @@ public class UserApi {
   /**
    * Create user
    * This can only be done by the logged in user.
-   * @param body Created user object (required)
+   * @param user Created user object (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> createUserWithHttpInfo(User body) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> createUserWithHttpInfo(User user) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = createUserRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = createUserRequestBuilder(user);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -130,10 +130,10 @@ public class UserApi {
     }
   }
 
-  private HttpRequest.Builder createUserRequestBuilder(User body) throws ApiException {
-    // verify the required parameter 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling createUser");
+  private HttpRequest.Builder createUserRequestBuilder(User user) throws ApiException {
+    // verify the required parameter 'user' is set
+    if (user == null) {
+      throw new ApiException(400, "Missing the required parameter 'user' when calling createUser");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -146,7 +146,7 @@ public class UserApi {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(user);
       localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);
@@ -162,13 +162,13 @@ public class UserApi {
   /**
    * Creates list of users with given input array
    * 
-   * @param body List of user object (required)
+   * @param user List of user object (required)
    * @return CompletableFuture&lt;Void&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> createUsersWithArrayInput(List<User> body) throws ApiException {
+  public CompletableFuture<Void> createUsersWithArrayInput(List<User> user) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = createUsersWithArrayInputRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = createUsersWithArrayInputRequestBuilder(user);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -186,13 +186,13 @@ public class UserApi {
   /**
    * Creates list of users with given input array
    * 
-   * @param body List of user object (required)
+   * @param user List of user object (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> createUsersWithArrayInputWithHttpInfo(List<User> body) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> createUsersWithArrayInputWithHttpInfo(List<User> user) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = createUsersWithArrayInputRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = createUsersWithArrayInputRequestBuilder(user);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -213,10 +213,10 @@ public class UserApi {
     }
   }
 
-  private HttpRequest.Builder createUsersWithArrayInputRequestBuilder(List<User> body) throws ApiException {
-    // verify the required parameter 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling createUsersWithArrayInput");
+  private HttpRequest.Builder createUsersWithArrayInputRequestBuilder(List<User> user) throws ApiException {
+    // verify the required parameter 'user' is set
+    if (user == null) {
+      throw new ApiException(400, "Missing the required parameter 'user' when calling createUsersWithArrayInput");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -229,7 +229,7 @@ public class UserApi {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(user);
       localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);
@@ -245,13 +245,13 @@ public class UserApi {
   /**
    * Creates list of users with given input array
    * 
-   * @param body List of user object (required)
+   * @param user List of user object (required)
    * @return CompletableFuture&lt;Void&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> createUsersWithListInput(List<User> body) throws ApiException {
+  public CompletableFuture<Void> createUsersWithListInput(List<User> user) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = createUsersWithListInputRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = createUsersWithListInputRequestBuilder(user);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -269,13 +269,13 @@ public class UserApi {
   /**
    * Creates list of users with given input array
    * 
-   * @param body List of user object (required)
+   * @param user List of user object (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> createUsersWithListInputWithHttpInfo(List<User> body) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> createUsersWithListInputWithHttpInfo(List<User> user) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = createUsersWithListInputRequestBuilder(body);
+      HttpRequest.Builder localVarRequestBuilder = createUsersWithListInputRequestBuilder(user);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -296,10 +296,10 @@ public class UserApi {
     }
   }
 
-  private HttpRequest.Builder createUsersWithListInputRequestBuilder(List<User> body) throws ApiException {
-    // verify the required parameter 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' when calling createUsersWithListInput");
+  private HttpRequest.Builder createUsersWithListInputRequestBuilder(List<User> user) throws ApiException {
+    // verify the required parameter 'user' is set
+    if (user == null) {
+      throw new ApiException(400, "Missing the required parameter 'user' when calling createUsersWithListInput");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -312,7 +312,7 @@ public class UserApi {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(user);
       localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);
@@ -679,13 +679,13 @@ public class UserApi {
    * Updated user
    * This can only be done by the logged in user.
    * @param username name that need to be deleted (required)
-   * @param body Updated user object (required)
+   * @param user Updated user object (required)
    * @return CompletableFuture&lt;Void&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<Void> updateUser(String username, User body) throws ApiException {
+  public CompletableFuture<Void> updateUser(String username, User user) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = updateUserRequestBuilder(username, body);
+      HttpRequest.Builder localVarRequestBuilder = updateUserRequestBuilder(username, user);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -704,13 +704,13 @@ public class UserApi {
    * Updated user
    * This can only be done by the logged in user.
    * @param username name that need to be deleted (required)
-   * @param body Updated user object (required)
+   * @param user Updated user object (required)
    * @return CompletableFuture&lt;ApiResponse&lt;Void&gt;&gt;
    * @throws ApiException if fails to make API call
    */
-  public CompletableFuture<ApiResponse<Void>> updateUserWithHttpInfo(String username, User body) throws ApiException {
+  public CompletableFuture<ApiResponse<Void>> updateUserWithHttpInfo(String username, User user) throws ApiException {
     try {
-      HttpRequest.Builder localVarRequestBuilder = updateUserRequestBuilder(username, body);
+      HttpRequest.Builder localVarRequestBuilder = updateUserRequestBuilder(username, user);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -731,14 +731,14 @@ public class UserApi {
     }
   }
 
-  private HttpRequest.Builder updateUserRequestBuilder(String username, User body) throws ApiException {
+  private HttpRequest.Builder updateUserRequestBuilder(String username, User user) throws ApiException {
     // 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 'body' is set
-    if (body == null) {
-      throw new ApiException(400, "Missing the required parameter 'body' 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");
     }
 
     HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
@@ -752,7 +752,7 @@ public class UserApi {
     localVarRequestBuilder.header("Accept", "application/json");
 
     try {
-      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(body);
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(user);
       localVarRequestBuilder.method("PUT", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
     } catch (IOException e) {
       throw new ApiException(e);

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java

@@ -22,9 +22,7 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
-import java.math.BigDecimal;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 
@@ -33,392 +31,83 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
  * AdditionalPropertiesClass
  */
 @JsonPropertyOrder({
-  AdditionalPropertiesClass.JSON_PROPERTY_MAP_STRING,
-  AdditionalPropertiesClass.JSON_PROPERTY_MAP_NUMBER,
-  AdditionalPropertiesClass.JSON_PROPERTY_MAP_INTEGER,
-  AdditionalPropertiesClass.JSON_PROPERTY_MAP_BOOLEAN,
-  AdditionalPropertiesClass.JSON_PROPERTY_MAP_ARRAY_INTEGER,
-  AdditionalPropertiesClass.JSON_PROPERTY_MAP_ARRAY_ANYTYPE,
-  AdditionalPropertiesClass.JSON_PROPERTY_MAP_MAP_STRING,
-  AdditionalPropertiesClass.JSON_PROPERTY_MAP_MAP_ANYTYPE,
-  AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE1,
-  AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
-  AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_PROPERTY,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_OF_MAP_PROPERTY
 })
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AdditionalPropertiesClass {
-  public static final String JSON_PROPERTY_MAP_STRING = "map_string";
-  private Map<String, String> mapString = null;
+  public static final String JSON_PROPERTY_MAP_PROPERTY = "map_property";
+  private Map<String, String> mapProperty = null;
 
-  public static final String JSON_PROPERTY_MAP_NUMBER = "map_number";
-  private Map<String, BigDecimal> mapNumber = null;
-
-  public static final String JSON_PROPERTY_MAP_INTEGER = "map_integer";
-  private Map<String, Integer> mapInteger = null;
-
-  public static final String JSON_PROPERTY_MAP_BOOLEAN = "map_boolean";
-  private Map<String, Boolean> mapBoolean = null;
-
-  public static final String JSON_PROPERTY_MAP_ARRAY_INTEGER = "map_array_integer";
-  private Map<String, List<Integer>> mapArrayInteger = null;
-
-  public static final String JSON_PROPERTY_MAP_ARRAY_ANYTYPE = "map_array_anytype";
-  private Map<String, List<Object>> mapArrayAnytype = null;
-
-  public static final String JSON_PROPERTY_MAP_MAP_STRING = "map_map_string";
-  private Map<String, Map<String, String>> mapMapString = null;
-
-  public static final String JSON_PROPERTY_MAP_MAP_ANYTYPE = "map_map_anytype";
-  private Map<String, Map<String, Object>> mapMapAnytype = null;
-
-  public static final String JSON_PROPERTY_ANYTYPE1 = "anytype_1";
-  private Object anytype1;
-
-  public static final String JSON_PROPERTY_ANYTYPE2 = "anytype_2";
-  private Object anytype2;
-
-  public static final String JSON_PROPERTY_ANYTYPE3 = "anytype_3";
-  private Object anytype3;
+  public static final String JSON_PROPERTY_MAP_OF_MAP_PROPERTY = "map_of_map_property";
+  private Map<String, Map<String, String>> mapOfMapProperty = null;
 
   public AdditionalPropertiesClass() { 
   }
 
-  public AdditionalPropertiesClass mapString(Map<String, String> mapString) {
-    this.mapString = mapString;
+  public AdditionalPropertiesClass mapProperty(Map<String, String> mapProperty) {
+    this.mapProperty = mapProperty;
     return this;
   }
 
-  public AdditionalPropertiesClass putMapStringItem(String key, String mapStringItem) {
-    if (this.mapString == null) {
-      this.mapString = new HashMap<>();
+  public AdditionalPropertiesClass putMapPropertyItem(String key, String mapPropertyItem) {
+    if (this.mapProperty == null) {
+      this.mapProperty = new HashMap<>();
     }
-    this.mapString.put(key, mapStringItem);
+    this.mapProperty.put(key, mapPropertyItem);
     return this;
   }
 
    /**
-   * Get mapString
-   * @return mapString
+   * Get mapProperty
+   * @return mapProperty
   **/
   @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_MAP_STRING)
+  @JsonProperty(JSON_PROPERTY_MAP_PROPERTY)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
 
-  public Map<String, String> getMapString() {
-    return mapString;
+  public Map<String, String> getMapProperty() {
+    return mapProperty;
   }
 
 
-  @JsonProperty(JSON_PROPERTY_MAP_STRING)
+  @JsonProperty(JSON_PROPERTY_MAP_PROPERTY)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setMapString(Map<String, String> mapString) {
-    this.mapString = mapString;
+  public void setMapProperty(Map<String, String> mapProperty) {
+    this.mapProperty = mapProperty;
   }
 
 
-  public AdditionalPropertiesClass mapNumber(Map<String, BigDecimal> mapNumber) {
-    this.mapNumber = mapNumber;
+  public AdditionalPropertiesClass mapOfMapProperty(Map<String, Map<String, String>> mapOfMapProperty) {
+    this.mapOfMapProperty = mapOfMapProperty;
     return this;
   }
 
-  public AdditionalPropertiesClass putMapNumberItem(String key, BigDecimal mapNumberItem) {
-    if (this.mapNumber == null) {
-      this.mapNumber = new HashMap<>();
+  public AdditionalPropertiesClass putMapOfMapPropertyItem(String key, Map<String, String> mapOfMapPropertyItem) {
+    if (this.mapOfMapProperty == null) {
+      this.mapOfMapProperty = new HashMap<>();
     }
-    this.mapNumber.put(key, mapNumberItem);
+    this.mapOfMapProperty.put(key, mapOfMapPropertyItem);
     return this;
   }
 
    /**
-   * Get mapNumber
-   * @return mapNumber
+   * Get mapOfMapProperty
+   * @return mapOfMapProperty
   **/
   @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_MAP_NUMBER)
+  @JsonProperty(JSON_PROPERTY_MAP_OF_MAP_PROPERTY)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
 
-  public Map<String, BigDecimal> getMapNumber() {
-    return mapNumber;
+  public Map<String, Map<String, String>> getMapOfMapProperty() {
+    return mapOfMapProperty;
   }
 
 
-  @JsonProperty(JSON_PROPERTY_MAP_NUMBER)
+  @JsonProperty(JSON_PROPERTY_MAP_OF_MAP_PROPERTY)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setMapNumber(Map<String, BigDecimal> mapNumber) {
-    this.mapNumber = mapNumber;
-  }
-
-
-  public AdditionalPropertiesClass mapInteger(Map<String, Integer> mapInteger) {
-    this.mapInteger = mapInteger;
-    return this;
-  }
-
-  public AdditionalPropertiesClass putMapIntegerItem(String key, Integer mapIntegerItem) {
-    if (this.mapInteger == null) {
-      this.mapInteger = new HashMap<>();
-    }
-    this.mapInteger.put(key, mapIntegerItem);
-    return this;
-  }
-
-   /**
-   * Get mapInteger
-   * @return mapInteger
-  **/
-  @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_MAP_INTEGER)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-
-  public Map<String, Integer> getMapInteger() {
-    return mapInteger;
-  }
-
-
-  @JsonProperty(JSON_PROPERTY_MAP_INTEGER)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setMapInteger(Map<String, Integer> mapInteger) {
-    this.mapInteger = mapInteger;
-  }
-
-
-  public AdditionalPropertiesClass mapBoolean(Map<String, Boolean> mapBoolean) {
-    this.mapBoolean = mapBoolean;
-    return this;
-  }
-
-  public AdditionalPropertiesClass putMapBooleanItem(String key, Boolean mapBooleanItem) {
-    if (this.mapBoolean == null) {
-      this.mapBoolean = new HashMap<>();
-    }
-    this.mapBoolean.put(key, mapBooleanItem);
-    return this;
-  }
-
-   /**
-   * Get mapBoolean
-   * @return mapBoolean
-  **/
-  @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_MAP_BOOLEAN)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-
-  public Map<String, Boolean> getMapBoolean() {
-    return mapBoolean;
-  }
-
-
-  @JsonProperty(JSON_PROPERTY_MAP_BOOLEAN)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setMapBoolean(Map<String, Boolean> mapBoolean) {
-    this.mapBoolean = mapBoolean;
-  }
-
-
-  public AdditionalPropertiesClass mapArrayInteger(Map<String, List<Integer>> mapArrayInteger) {
-    this.mapArrayInteger = mapArrayInteger;
-    return this;
-  }
-
-  public AdditionalPropertiesClass putMapArrayIntegerItem(String key, List<Integer> mapArrayIntegerItem) {
-    if (this.mapArrayInteger == null) {
-      this.mapArrayInteger = new HashMap<>();
-    }
-    this.mapArrayInteger.put(key, mapArrayIntegerItem);
-    return this;
-  }
-
-   /**
-   * Get mapArrayInteger
-   * @return mapArrayInteger
-  **/
-  @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_MAP_ARRAY_INTEGER)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-
-  public Map<String, List<Integer>> getMapArrayInteger() {
-    return mapArrayInteger;
-  }
-
-
-  @JsonProperty(JSON_PROPERTY_MAP_ARRAY_INTEGER)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setMapArrayInteger(Map<String, List<Integer>> mapArrayInteger) {
-    this.mapArrayInteger = mapArrayInteger;
-  }
-
-
-  public AdditionalPropertiesClass mapArrayAnytype(Map<String, List<Object>> mapArrayAnytype) {
-    this.mapArrayAnytype = mapArrayAnytype;
-    return this;
-  }
-
-  public AdditionalPropertiesClass putMapArrayAnytypeItem(String key, List<Object> mapArrayAnytypeItem) {
-    if (this.mapArrayAnytype == null) {
-      this.mapArrayAnytype = new HashMap<>();
-    }
-    this.mapArrayAnytype.put(key, mapArrayAnytypeItem);
-    return this;
-  }
-
-   /**
-   * Get mapArrayAnytype
-   * @return mapArrayAnytype
-  **/
-  @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_MAP_ARRAY_ANYTYPE)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-
-  public Map<String, List<Object>> getMapArrayAnytype() {
-    return mapArrayAnytype;
-  }
-
-
-  @JsonProperty(JSON_PROPERTY_MAP_ARRAY_ANYTYPE)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setMapArrayAnytype(Map<String, List<Object>> mapArrayAnytype) {
-    this.mapArrayAnytype = mapArrayAnytype;
-  }
-
-
-  public AdditionalPropertiesClass mapMapString(Map<String, Map<String, String>> mapMapString) {
-    this.mapMapString = mapMapString;
-    return this;
-  }
-
-  public AdditionalPropertiesClass putMapMapStringItem(String key, Map<String, String> mapMapStringItem) {
-    if (this.mapMapString == null) {
-      this.mapMapString = new HashMap<>();
-    }
-    this.mapMapString.put(key, mapMapStringItem);
-    return this;
-  }
-
-   /**
-   * Get mapMapString
-   * @return mapMapString
-  **/
-  @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_MAP_MAP_STRING)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-
-  public Map<String, Map<String, String>> getMapMapString() {
-    return mapMapString;
-  }
-
-
-  @JsonProperty(JSON_PROPERTY_MAP_MAP_STRING)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setMapMapString(Map<String, Map<String, String>> mapMapString) {
-    this.mapMapString = mapMapString;
-  }
-
-
-  public AdditionalPropertiesClass mapMapAnytype(Map<String, Map<String, Object>> mapMapAnytype) {
-    this.mapMapAnytype = mapMapAnytype;
-    return this;
-  }
-
-  public AdditionalPropertiesClass putMapMapAnytypeItem(String key, Map<String, Object> mapMapAnytypeItem) {
-    if (this.mapMapAnytype == null) {
-      this.mapMapAnytype = new HashMap<>();
-    }
-    this.mapMapAnytype.put(key, mapMapAnytypeItem);
-    return this;
-  }
-
-   /**
-   * Get mapMapAnytype
-   * @return mapMapAnytype
-  **/
-  @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_MAP_MAP_ANYTYPE)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-
-  public Map<String, Map<String, Object>> getMapMapAnytype() {
-    return mapMapAnytype;
-  }
-
-
-  @JsonProperty(JSON_PROPERTY_MAP_MAP_ANYTYPE)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setMapMapAnytype(Map<String, Map<String, Object>> mapMapAnytype) {
-    this.mapMapAnytype = mapMapAnytype;
-  }
-
-
-  public AdditionalPropertiesClass anytype1(Object anytype1) {
-    this.anytype1 = anytype1;
-    return this;
-  }
-
-   /**
-   * Get anytype1
-   * @return anytype1
-  **/
-  @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_ANYTYPE1)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-
-  public Object getAnytype1() {
-    return anytype1;
-  }
-
-
-  @JsonProperty(JSON_PROPERTY_ANYTYPE1)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setAnytype1(Object anytype1) {
-    this.anytype1 = anytype1;
-  }
-
-
-  public AdditionalPropertiesClass anytype2(Object anytype2) {
-    this.anytype2 = anytype2;
-    return this;
-  }
-
-   /**
-   * Get anytype2
-   * @return anytype2
-  **/
-  @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_ANYTYPE2)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-
-  public Object getAnytype2() {
-    return anytype2;
-  }
-
-
-  @JsonProperty(JSON_PROPERTY_ANYTYPE2)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setAnytype2(Object anytype2) {
-    this.anytype2 = anytype2;
-  }
-
-
-  public AdditionalPropertiesClass anytype3(Object anytype3) {
-    this.anytype3 = anytype3;
-    return this;
-  }
-
-   /**
-   * Get anytype3
-   * @return anytype3
-  **/
-  @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_ANYTYPE3)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-
-  public Object getAnytype3() {
-    return anytype3;
-  }
-
-
-  @JsonProperty(JSON_PROPERTY_ANYTYPE3)
-  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setAnytype3(Object anytype3) {
-    this.anytype3 = anytype3;
+  public void setMapOfMapProperty(Map<String, Map<String, String>> mapOfMapProperty) {
+    this.mapOfMapProperty = mapOfMapProperty;
   }
 
 
@@ -434,39 +123,21 @@ public class AdditionalPropertiesClass {
       return false;
     }
     AdditionalPropertiesClass additionalPropertiesClass = (AdditionalPropertiesClass) o;
-    return Objects.equals(this.mapString, additionalPropertiesClass.mapString) &&
-        Objects.equals(this.mapNumber, additionalPropertiesClass.mapNumber) &&
-        Objects.equals(this.mapInteger, additionalPropertiesClass.mapInteger) &&
-        Objects.equals(this.mapBoolean, additionalPropertiesClass.mapBoolean) &&
-        Objects.equals(this.mapArrayInteger, additionalPropertiesClass.mapArrayInteger) &&
-        Objects.equals(this.mapArrayAnytype, additionalPropertiesClass.mapArrayAnytype) &&
-        Objects.equals(this.mapMapString, additionalPropertiesClass.mapMapString) &&
-        Objects.equals(this.mapMapAnytype, additionalPropertiesClass.mapMapAnytype) &&
-        Objects.equals(this.anytype1, additionalPropertiesClass.anytype1) &&
-        Objects.equals(this.anytype2, additionalPropertiesClass.anytype2) &&
-        Objects.equals(this.anytype3, additionalPropertiesClass.anytype3);
+    return Objects.equals(this.mapProperty, additionalPropertiesClass.mapProperty) &&
+        Objects.equals(this.mapOfMapProperty, additionalPropertiesClass.mapOfMapProperty);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(mapString, mapNumber, mapInteger, mapBoolean, mapArrayInteger, mapArrayAnytype, mapMapString, mapMapAnytype, anytype1, anytype2, anytype3);
+    return Objects.hash(mapProperty, mapOfMapProperty);
   }
 
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append("class AdditionalPropertiesClass {\n");
-    sb.append("    mapString: ").append(toIndentedString(mapString)).append("\n");
-    sb.append("    mapNumber: ").append(toIndentedString(mapNumber)).append("\n");
-    sb.append("    mapInteger: ").append(toIndentedString(mapInteger)).append("\n");
-    sb.append("    mapBoolean: ").append(toIndentedString(mapBoolean)).append("\n");
-    sb.append("    mapArrayInteger: ").append(toIndentedString(mapArrayInteger)).append("\n");
-    sb.append("    mapArrayAnytype: ").append(toIndentedString(mapArrayAnytype)).append("\n");
-    sb.append("    mapMapString: ").append(toIndentedString(mapMapString)).append("\n");
-    sb.append("    mapMapAnytype: ").append(toIndentedString(mapMapAnytype)).append("\n");
-    sb.append("    anytype1: ").append(toIndentedString(anytype1)).append("\n");
-    sb.append("    anytype2: ").append(toIndentedString(anytype2)).append("\n");
-    sb.append("    anytype3: ").append(toIndentedString(anytype3)).append("\n");
+    sb.append("    mapProperty: ").append(toIndentedString(mapProperty)).append("\n");
+    sb.append("    mapOfMapProperty: ").append(toIndentedString(mapOfMapProperty)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/AllOfWithSingleRef.java

@@ -0,0 +1,140 @@
+/*
+ * 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 java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.openapitools.client.model.SingleRefType;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+/**
+ * AllOfWithSingleRef
+ */
+@JsonPropertyOrder({
+  AllOfWithSingleRef.JSON_PROPERTY_USERNAME,
+  AllOfWithSingleRef.JSON_PROPERTY_SINGLE_REF_TYPE
+})
+@javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class AllOfWithSingleRef {
+  public static final String JSON_PROPERTY_USERNAME = "username";
+  private String username;
+
+  public static final String JSON_PROPERTY_SINGLE_REF_TYPE = "SingleRefType";
+  private SingleRefType singleRefType;
+
+  public AllOfWithSingleRef() { 
+  }
+
+  public AllOfWithSingleRef username(String username) {
+    this.username = username;
+    return this;
+  }
+
+   /**
+   * Get username
+   * @return username
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_USERNAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getUsername() {
+    return username;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_USERNAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setUsername(String username) {
+    this.username = username;
+  }
+
+
+  public AllOfWithSingleRef singleRefType(SingleRefType singleRefType) {
+    this.singleRefType = singleRefType;
+    return this;
+  }
+
+   /**
+   * Get singleRefType
+   * @return singleRefType
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_SINGLE_REF_TYPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public SingleRefType getSingleRefType() {
+    return singleRefType;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_SINGLE_REF_TYPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setSingleRefType(SingleRefType singleRefType) {
+    this.singleRefType = singleRefType;
+  }
+
+
+  /**
+   * Return true if this AllOfWithSingleRef object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AllOfWithSingleRef allOfWithSingleRef = (AllOfWithSingleRef) o;
+    return Objects.equals(this.username, allOfWithSingleRef.username) &&
+        Objects.equals(this.singleRefType, allOfWithSingleRef.singleRefType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(username, singleRefType);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AllOfWithSingleRef {\n");
+    sb.append("    username: ").append(toIndentedString(username)).append("\n");
+    sb.append("    singleRefType: ").append(toIndentedString(singleRefType)).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(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Animal.java

@@ -25,7 +25,6 @@ import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
-import org.openapitools.client.model.BigCat;
 import org.openapitools.client.model.Cat;
 import org.openapitools.client.model.Dog;
 import com.fasterxml.jackson.annotation.JsonPropertyOrder;
@@ -46,7 +45,6 @@ import org.openapitools.client.JSON;
 )
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "className", visible = true)
 @JsonSubTypes({
-  @JsonSubTypes.Type(value = BigCat.class, name = "BigCat"),
   @JsonSubTypes.Type(value = Cat.class, name = "Cat"),
   @JsonSubTypes.Type(value = Dog.class, name = "Dog"),
 })
@@ -156,7 +154,6 @@ public class Animal {
 static {
   // Initialize and register the discriminator mappings.
   Map<String, Class<?>> mappings = new HashMap<String, Class<?>>();
-  mappings.put("BigCat", BigCat.class);
   mappings.put("Cat", Cat.class);
   mappings.put("Dog", Dog.class);
   mappings.put("Animal", Animal.class);

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Cat.java

@@ -26,7 +26,6 @@ import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
 import org.openapitools.client.model.Animal;
-import org.openapitools.client.model.BigCat;
 import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 
 
@@ -43,9 +42,6 @@ import org.openapitools.client.JSON;
   allowSetters = true // allows the className to be set during deserialization
 )
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "className", visible = true)
-@JsonSubTypes({
-  @JsonSubTypes.Type(value = BigCat.class, name = "BigCat"),
-})
 
 public class Cat extends Animal {
   public static final String JSON_PROPERTY_DECLAWED = "declawed";
@@ -124,7 +120,6 @@ public class Cat extends Animal {
 static {
   // Initialize and register the discriminator mappings.
   Map<String, Class<?>> mappings = new HashMap<String, Class<?>>();
-  mappings.put("BigCat", BigCat.class);
   mappings.put("Cat", Cat.class);
   JSON.registerDiscriminator(Cat.class, "className", mappings);
 }

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/DeprecatedObject.java

@@ -0,0 +1,110 @@
+/*
+ * 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 java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+/**
+ * DeprecatedObject
+ * @deprecated
+ */
+@Deprecated
+@JsonPropertyOrder({
+  DeprecatedObject.JSON_PROPERTY_NAME
+})
+@javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class DeprecatedObject {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+  public DeprecatedObject() { 
+  }
+
+  public DeprecatedObject name(String name) {
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  /**
+   * Return true if this DeprecatedObject object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    DeprecatedObject deprecatedObject = (DeprecatedObject) o;
+    return Objects.equals(this.name, deprecatedObject.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class DeprecatedObject {\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(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/EnumTest.java

@@ -23,6 +23,13 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
 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 org.openapitools.jackson.nullable.JsonNullable;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.util.NoSuchElementException;
 import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 
 
@@ -34,7 +41,10 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   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,
+  EnumTest.JSON_PROPERTY_OUTER_ENUM_INTEGER,
+  EnumTest.JSON_PROPERTY_OUTER_ENUM_DEFAULT_VALUE,
+  EnumTest.JSON_PROPERTY_OUTER_ENUM_INTEGER_DEFAULT_VALUE
 })
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class EnumTest {
@@ -195,7 +205,16 @@ public class EnumTest {
   private EnumNumberEnum enumNumber;
 
   public static final String JSON_PROPERTY_OUTER_ENUM = "outerEnum";
-  private OuterEnum 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() { 
   }
@@ -301,7 +320,7 @@ public class EnumTest {
 
 
   public EnumTest outerEnum(OuterEnum outerEnum) {
-    this.outerEnum = outerEnum;
+    this.outerEnum = JsonNullable.<OuterEnum>of(outerEnum);
     return this;
   }
 
@@ -310,18 +329,101 @@ public class EnumTest {
    * @return outerEnum
   **/
   @javax.annotation.Nullable
+  @JsonIgnore
+
+  public OuterEnum getOuterEnum() {
+        return outerEnum.orElse(null);
+  }
+
   @JsonProperty(JSON_PROPERTY_OUTER_ENUM)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
 
-  public OuterEnum getOuterEnum() {
+  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);
+  }
 
 
-  @JsonProperty(JSON_PROPERTY_OUTER_ENUM)
+  public EnumTest outerEnumInteger(OuterEnumInteger outerEnumInteger) {
+    this.outerEnumInteger = outerEnumInteger;
+    return this;
+  }
+
+   /**
+   * Get outerEnumInteger
+   * @return outerEnumInteger
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM_INTEGER)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setOuterEnum(OuterEnum outerEnum) {
-    this.outerEnum = outerEnum;
+
+  public OuterEnumInteger getOuterEnumInteger() {
+    return outerEnumInteger;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  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
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM_DEFAULT_VALUE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OuterEnumDefaultValue getOuterEnumDefaultValue() {
+    return outerEnumDefaultValue;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM_DEFAULT_VALUE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  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
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM_INTEGER_DEFAULT_VALUE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OuterEnumIntegerDefaultValue getOuterEnumIntegerDefaultValue() {
+    return outerEnumIntegerDefaultValue;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM_INTEGER_DEFAULT_VALUE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setOuterEnumIntegerDefaultValue(OuterEnumIntegerDefaultValue outerEnumIntegerDefaultValue) {
+    this.outerEnumIntegerDefaultValue = outerEnumIntegerDefaultValue;
   }
 
 
@@ -341,12 +443,26 @@ public class EnumTest {
         Objects.equals(this.enumStringRequired, enumTest.enumStringRequired) &&
         Objects.equals(this.enumInteger, enumTest.enumInteger) &&
         Objects.equals(this.enumNumber, enumTest.enumNumber) &&
-        Objects.equals(this.outerEnum, enumTest.outerEnum);
+        equalsNullable(this.outerEnum, enumTest.outerEnum) &&
+        Objects.equals(this.outerEnumInteger, enumTest.outerEnumInteger) &&
+        Objects.equals(this.outerEnumDefaultValue, enumTest.outerEnumDefaultValue) &&
+        Objects.equals(this.outerEnumIntegerDefaultValue, enumTest.outerEnumIntegerDefaultValue);
+  }
+
+  private static <T> boolean equalsNullable(JsonNullable<T> a, JsonNullable<T> b) {
+    return a == b || (a != null && b != null && a.isPresent() && b.isPresent() && Objects.deepEquals(a.get(), b.get()));
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(enumString, enumStringRequired, enumInteger, enumNumber, outerEnum);
+    return Objects.hash(enumString, enumStringRequired, enumInteger, enumNumber, hashCodeNullable(outerEnum), outerEnumInteger, outerEnumDefaultValue, outerEnumIntegerDefaultValue);
+  }
+
+  private static <T> int hashCodeNullable(JsonNullable<T> a) {
+    if (a == null) {
+      return 1;
+    }
+    return a.isPresent() ? Arrays.deepHashCode(new Object[]{a.get()}) : 31;
   }
 
   @Override
@@ -358,6 +474,9 @@ public class EnumTest {
     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();
   }

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/Foo.java

@@ -0,0 +1,108 @@
+/*
+ * 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 java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+/**
+ * Foo
+ */
+@JsonPropertyOrder({
+  Foo.JSON_PROPERTY_BAR
+})
+@javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Foo {
+  public static final String JSON_PROPERTY_BAR = "bar";
+  private String bar = "bar";
+
+  public Foo() { 
+  }
+
+  public Foo bar(String bar) {
+    this.bar = bar;
+    return this;
+  }
+
+   /**
+   * Get bar
+   * @return bar
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_BAR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBar() {
+    return bar;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_BAR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setBar(String bar) {
+    this.bar = bar;
+  }
+
+
+  /**
+   * Return true if this Foo object is equal to o.
+   */
+  @Override
+  public boolean equals(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(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/FooGetDefaultResponse.java

@@ -0,0 +1,109 @@
+/*
+ * 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 java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.openapitools.client.model.Foo;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+/**
+ * FooGetDefaultResponse
+ */
+@JsonPropertyOrder({
+  FooGetDefaultResponse.JSON_PROPERTY_STRING
+})
+@javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class FooGetDefaultResponse {
+  public static final String JSON_PROPERTY_STRING = "string";
+  private Foo string;
+
+  public FooGetDefaultResponse() { 
+  }
+
+  public FooGetDefaultResponse string(Foo string) {
+    this.string = string;
+    return this;
+  }
+
+   /**
+   * Get string
+   * @return string
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Foo getString() {
+    return string;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setString(Foo string) {
+    this.string = string;
+  }
+
+
+  /**
+   * Return true if this _foo_get_default_response object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    FooGetDefaultResponse fooGetDefaultResponse = (FooGetDefaultResponse) o;
+    return Objects.equals(this.string, fooGetDefaultResponse.string);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(string);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class FooGetDefaultResponse {\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(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/FormatTest.java

@@ -40,6 +40,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_NUMBER,
   FormatTest.JSON_PROPERTY_FLOAT,
   FormatTest.JSON_PROPERTY_DOUBLE,
+  FormatTest.JSON_PROPERTY_DECIMAL,
   FormatTest.JSON_PROPERTY_STRING,
   FormatTest.JSON_PROPERTY_BYTE,
   FormatTest.JSON_PROPERTY_BINARY,
@@ -47,7 +48,8 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
   FormatTest.JSON_PROPERTY_DATE_TIME,
   FormatTest.JSON_PROPERTY_UUID,
   FormatTest.JSON_PROPERTY_PASSWORD,
-  FormatTest.JSON_PROPERTY_BIG_DECIMAL
+  FormatTest.JSON_PROPERTY_PATTERN_WITH_DIGITS,
+  FormatTest.JSON_PROPERTY_PATTERN_WITH_DIGITS_AND_DELIMITER
 })
 @javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormatTest {
@@ -69,6 +71,9 @@ public class FormatTest {
   public static final String JSON_PROPERTY_DOUBLE = "double";
   private Double _double;
 
+  public static final String JSON_PROPERTY_DECIMAL = "decimal";
+  private BigDecimal decimal;
+
   public static final String JSON_PROPERTY_STRING = "string";
   private String string;
 
@@ -90,8 +95,11 @@ public class FormatTest {
   public static final String JSON_PROPERTY_PASSWORD = "password";
   private String password;
 
-  public static final String JSON_PROPERTY_BIG_DECIMAL = "BigDecimal";
-  private BigDecimal bigDecimal;
+  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() { 
   }
@@ -256,6 +264,31 @@ public class FormatTest {
   }
 
 
+  public FormatTest decimal(BigDecimal decimal) {
+    this.decimal = decimal;
+    return this;
+  }
+
+   /**
+   * Get decimal
+   * @return decimal
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_DECIMAL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public BigDecimal getDecimal() {
+    return decimal;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DECIMAL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setDecimal(BigDecimal decimal) {
+    this.decimal = decimal;
+  }
+
+
   public FormatTest string(String string) {
     this.string = string;
     return this;
@@ -431,28 +464,53 @@ public class FormatTest {
   }
 
 
-  public FormatTest bigDecimal(BigDecimal bigDecimal) {
-    this.bigDecimal = bigDecimal;
+  public FormatTest patternWithDigits(String patternWithDigits) {
+    this.patternWithDigits = patternWithDigits;
     return this;
   }
 
    /**
-   * Get bigDecimal
-   * @return bigDecimal
+   * A string that is a 10 digit number. Can have leading zeros.
+   * @return patternWithDigits
   **/
   @javax.annotation.Nullable
-  @JsonProperty(JSON_PROPERTY_BIG_DECIMAL)
+  @JsonProperty(JSON_PROPERTY_PATTERN_WITH_DIGITS)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
 
-  public BigDecimal getBigDecimal() {
-    return bigDecimal;
+  public String getPatternWithDigits() {
+    return patternWithDigits;
   }
 
 
-  @JsonProperty(JSON_PROPERTY_BIG_DECIMAL)
+  @JsonProperty(JSON_PROPERTY_PATTERN_WITH_DIGITS)
   @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
-  public void setBigDecimal(BigDecimal bigDecimal) {
-    this.bigDecimal = bigDecimal;
+  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
+  @JsonProperty(JSON_PROPERTY_PATTERN_WITH_DIGITS_AND_DELIMITER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getPatternWithDigitsAndDelimiter() {
+    return patternWithDigitsAndDelimiter;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_PATTERN_WITH_DIGITS_AND_DELIMITER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setPatternWithDigitsAndDelimiter(String patternWithDigitsAndDelimiter) {
+    this.patternWithDigitsAndDelimiter = patternWithDigitsAndDelimiter;
   }
 
 
@@ -474,6 +532,7 @@ public class FormatTest {
         Objects.equals(this.number, formatTest.number) &&
         Objects.equals(this._float, formatTest._float) &&
         Objects.equals(this._double, formatTest._double) &&
+        Objects.equals(this.decimal, formatTest.decimal) &&
         Objects.equals(this.string, formatTest.string) &&
         Arrays.equals(this._byte, formatTest._byte) &&
         Objects.equals(this.binary, formatTest.binary) &&
@@ -481,12 +540,13 @@ public class FormatTest {
         Objects.equals(this.dateTime, formatTest.dateTime) &&
         Objects.equals(this.uuid, formatTest.uuid) &&
         Objects.equals(this.password, formatTest.password) &&
-        Objects.equals(this.bigDecimal, formatTest.bigDecimal);
+        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, bigDecimal);
+    return Objects.hash(integer, int32, int64, number, _float, _double, decimal, string, Arrays.hashCode(_byte), binary, date, dateTime, uuid, password, patternWithDigits, patternWithDigitsAndDelimiter);
   }
 
   @Override
@@ -499,6 +559,7 @@ public class FormatTest {
     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("    decimal: ").append(toIndentedString(decimal)).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");
@@ -506,7 +567,8 @@ public class FormatTest {
     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("    bigDecimal: ").append(toIndentedString(bigDecimal)).append("\n");
+    sb.append("    patternWithDigits: ").append(toIndentedString(patternWithDigits)).append("\n");
+    sb.append("    patternWithDigitsAndDelimiter: ").append(toIndentedString(patternWithDigitsAndDelimiter)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/HealthCheckResult.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 java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.openapitools.jackson.nullable.JsonNullable;
+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.
+ */
+@JsonPropertyOrder({
+  HealthCheckResult.JSON_PROPERTY_NULLABLE_MESSAGE
+})
+@javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class HealthCheckResult {
+  public static final String JSON_PROPERTY_NULLABLE_MESSAGE = "NullableMessage";
+  private JsonNullable<String> nullableMessage = JsonNullable.<String>undefined();
+
+  public HealthCheckResult() { 
+  }
+
+  public HealthCheckResult nullableMessage(String nullableMessage) {
+    this.nullableMessage = JsonNullable.<String>of(nullableMessage);
+    return this;
+  }
+
+   /**
+   * Get nullableMessage
+   * @return nullableMessage
+  **/
+  @javax.annotation.Nullable
+  @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);
+  }
+
+
+  /**
+   * Return true if this HealthCheckResult object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    HealthCheckResult healthCheckResult = (HealthCheckResult) o;
+    return equalsNullable(this.nullableMessage, healthCheckResult.nullableMessage);
+  }
+
+  private static <T> boolean equalsNullable(JsonNullable<T> a, JsonNullable<T> b) {
+    return a == b || (a != null && b != null && a.isPresent() && b.isPresent() && Objects.deepEquals(a.get(), b.get()));
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(hashCodeNullable(nullableMessage));
+  }
+
+  private static <T> int hashCodeNullable(JsonNullable<T> a) {
+    if (a == null) {
+      return 1;
+    }
+    return a.isPresent() ? Arrays.deepHashCode(new Object[]{a.get()}) : 31;
+  }
+
+  @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(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/NullableClass.java

@@ -0,0 +1,666 @@
+/*
+ * 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.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
+import java.util.Objects;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+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 org.openapitools.jackson.nullable.JsonNullable;
+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
+})
+@javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+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() { 
+  }
+
+  public NullableClass integerProp(Integer integerProp) {
+    this.integerProp = JsonNullable.<Integer>of(integerProp);
+    return this;
+  }
+
+   /**
+   * Get integerProp
+   * @return integerProp
+  **/
+  @javax.annotation.Nullable
+  @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
+  @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
+  @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
+  @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
+  @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
+  @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
+  @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
+  @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
+  @JsonProperty(JSON_PROPERTY_ARRAY_ITEMS_NULLABLE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<Object> getArrayItemsNullable() {
+    return arrayItemsNullable;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_ITEMS_NULLABLE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  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
+  @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
+  @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
+  @JsonProperty(JSON_PROPERTY_OBJECT_ITEMS_NULLABLE)
+  @JsonInclude(content = JsonInclude.Include.ALWAYS, value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Object> getObjectItemsNullable() {
+    return objectItemsNullable;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_OBJECT_ITEMS_NULLABLE)
+  @JsonInclude(content = JsonInclude.Include.ALWAYS, value = JsonInclude.Include.USE_DEFAULTS)
+  public void setObjectItemsNullable(Map<String, Object> objectItemsNullable) {
+    this.objectItemsNullable = objectItemsNullable;
+  }
+
+  /**
+   * A container for additional, undeclared properties.
+   * This is a holder for any undeclared properties as specified with
+   * the 'additionalProperties' keyword in the OAS document.
+   */
+  private Map<String, Object> additionalProperties;
+
+  /**
+   * Set the additional (undeclared) property with the specified name and value.
+   * If the property does not already exist, create it otherwise replace it.
+   * @param key the name of the property
+   * @param value the value of the property
+   * @return self reference
+   */
+  @JsonAnySetter
+  public NullableClass putAdditionalProperty(String key, Object value) {
+    if (this.additionalProperties == null) {
+        this.additionalProperties = new HashMap<String, Object>();
+    }
+    this.additionalProperties.put(key, value);
+    return this;
+  }
+
+  /**
+   * Return the additional (undeclared) properties.
+   * @return the additional (undeclared) properties
+   */
+  @JsonAnyGetter
+  public Map<String, Object> getAdditionalProperties() {
+    return additionalProperties;
+  }
+
+  /**
+   * Return the additional (undeclared) property with the specified name.
+   * @param key the name of the property
+   * @return the additional (undeclared) property with the specified name
+   */
+  public Object getAdditionalProperty(String key) {
+    if (this.additionalProperties == null) {
+        return null;
+    }
+    return this.additionalProperties.get(key);
+  }
+
+  /**
+   * Return true if this NullableClass object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    NullableClass nullableClass = (NullableClass) o;
+    return equalsNullable(this.integerProp, nullableClass.integerProp) &&
+        equalsNullable(this.numberProp, nullableClass.numberProp) &&
+        equalsNullable(this.booleanProp, nullableClass.booleanProp) &&
+        equalsNullable(this.stringProp, nullableClass.stringProp) &&
+        equalsNullable(this.dateProp, nullableClass.dateProp) &&
+        equalsNullable(this.datetimeProp, nullableClass.datetimeProp) &&
+        equalsNullable(this.arrayNullableProp, nullableClass.arrayNullableProp) &&
+        equalsNullable(this.arrayAndItemsNullableProp, nullableClass.arrayAndItemsNullableProp) &&
+        Objects.equals(this.arrayItemsNullable, nullableClass.arrayItemsNullable) &&
+        equalsNullable(this.objectNullableProp, nullableClass.objectNullableProp) &&
+        equalsNullable(this.objectAndItemsNullableProp, nullableClass.objectAndItemsNullableProp) &&
+        Objects.equals(this.objectItemsNullable, nullableClass.objectItemsNullable)&&
+        Objects.equals(this.additionalProperties, nullableClass.additionalProperties) &&
+        super.equals(o);
+  }
+
+  private static <T> boolean equalsNullable(JsonNullable<T> a, JsonNullable<T> b) {
+    return a == b || (a != null && b != null && a.isPresent() && b.isPresent() && Objects.deepEquals(a.get(), b.get()));
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(hashCodeNullable(integerProp), hashCodeNullable(numberProp), hashCodeNullable(booleanProp), hashCodeNullable(stringProp), hashCodeNullable(dateProp), hashCodeNullable(datetimeProp), hashCodeNullable(arrayNullableProp), hashCodeNullable(arrayAndItemsNullableProp), arrayItemsNullable, hashCodeNullable(objectNullableProp), hashCodeNullable(objectAndItemsNullableProp), objectItemsNullable, super.hashCode(), additionalProperties);
+  }
+
+  private static <T> int hashCodeNullable(JsonNullable<T> a) {
+    if (a == null) {
+      return 1;
+    }
+    return a.isPresent() ? Arrays.deepHashCode(new Object[]{a.get()}) : 31;
+  }
+
+  @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("    additionalProperties: ").append(toIndentedString(additionalProperties)).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(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/ObjectWithDeprecatedFields.java

@@ -0,0 +1,219 @@
+/*
+ * 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 java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import org.openapitools.client.model.DeprecatedObject;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+/**
+ * ObjectWithDeprecatedFields
+ */
+@JsonPropertyOrder({
+  ObjectWithDeprecatedFields.JSON_PROPERTY_UUID,
+  ObjectWithDeprecatedFields.JSON_PROPERTY_ID,
+  ObjectWithDeprecatedFields.JSON_PROPERTY_DEPRECATED_REF,
+  ObjectWithDeprecatedFields.JSON_PROPERTY_BARS
+})
+@javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ObjectWithDeprecatedFields {
+  public static final String JSON_PROPERTY_UUID = "uuid";
+  private String uuid;
+
+  public static final String JSON_PROPERTY_ID = "id";
+  private BigDecimal id;
+
+  public static final String JSON_PROPERTY_DEPRECATED_REF = "deprecatedRef";
+  private DeprecatedObject deprecatedRef;
+
+  public static final String JSON_PROPERTY_BARS = "bars";
+  private List<String> bars = null;
+
+  public ObjectWithDeprecatedFields() { 
+  }
+
+  public ObjectWithDeprecatedFields uuid(String uuid) {
+    this.uuid = uuid;
+    return this;
+  }
+
+   /**
+   * Get uuid
+   * @return uuid
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_UUID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getUuid() {
+    return uuid;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_UUID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setUuid(String uuid) {
+    this.uuid = uuid;
+  }
+
+
+  public ObjectWithDeprecatedFields id(BigDecimal id) {
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+   * @deprecated
+  **/
+  @Deprecated
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public BigDecimal getId() {
+    return id;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setId(BigDecimal id) {
+    this.id = id;
+  }
+
+
+  public ObjectWithDeprecatedFields deprecatedRef(DeprecatedObject deprecatedRef) {
+    this.deprecatedRef = deprecatedRef;
+    return this;
+  }
+
+   /**
+   * Get deprecatedRef
+   * @return deprecatedRef
+   * @deprecated
+  **/
+  @Deprecated
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_DEPRECATED_REF)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public DeprecatedObject getDeprecatedRef() {
+    return deprecatedRef;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DEPRECATED_REF)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setDeprecatedRef(DeprecatedObject deprecatedRef) {
+    this.deprecatedRef = deprecatedRef;
+  }
+
+
+  public ObjectWithDeprecatedFields bars(List<String> bars) {
+    this.bars = bars;
+    return this;
+  }
+
+  public ObjectWithDeprecatedFields addBarsItem(String barsItem) {
+    if (this.bars == null) {
+      this.bars = new ArrayList<>();
+    }
+    this.bars.add(barsItem);
+    return this;
+  }
+
+   /**
+   * Get bars
+   * @return bars
+   * @deprecated
+  **/
+  @Deprecated
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_BARS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<String> getBars() {
+    return bars;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_BARS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setBars(List<String> bars) {
+    this.bars = bars;
+  }
+
+
+  /**
+   * Return true if this ObjectWithDeprecatedFields object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ObjectWithDeprecatedFields objectWithDeprecatedFields = (ObjectWithDeprecatedFields) o;
+    return Objects.equals(this.uuid, objectWithDeprecatedFields.uuid) &&
+        Objects.equals(this.id, objectWithDeprecatedFields.id) &&
+        Objects.equals(this.deprecatedRef, objectWithDeprecatedFields.deprecatedRef) &&
+        Objects.equals(this.bars, objectWithDeprecatedFields.bars);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(uuid, id, deprecatedRef, bars);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ObjectWithDeprecatedFields {\n");
+    sb.append("    uuid: ").append(toIndentedString(uuid)).append("\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    deprecatedRef: ").append(toIndentedString(deprecatedRef)).append("\n");
+    sb.append("    bars: ").append(toIndentedString(bars)).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(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/OuterEnum.java

@@ -57,7 +57,7 @@ public enum OuterEnum {
         return b;
       }
     }
-    throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    return null;
   }
 }
 

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/OuterEnumDefaultValue.java

@@ -0,0 +1,63 @@
+/*
+ * 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 java.util.Map;
+import java.util.HashMap;
+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/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/OuterEnumInteger.java

@@ -0,0 +1,63 @@
+/*
+ * 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 java.util.Map;
+import java.util.HashMap;
+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/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/OuterEnumIntegerDefaultValue.java

@@ -0,0 +1,63 @@
+/*
+ * 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 java.util.Map;
+import java.util.HashMap;
+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/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/OuterObjectWithEnumProperty.java

@@ -0,0 +1,109 @@
+/*
+ * 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 java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.openapitools.client.model.OuterEnumInteger;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+/**
+ * OuterObjectWithEnumProperty
+ */
+@JsonPropertyOrder({
+  OuterObjectWithEnumProperty.JSON_PROPERTY_VALUE
+})
+@javax.annotation.processing.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class OuterObjectWithEnumProperty {
+  public static final String JSON_PROPERTY_VALUE = "value";
+  private OuterEnumInteger value;
+
+  public OuterObjectWithEnumProperty() { 
+  }
+
+  public OuterObjectWithEnumProperty value(OuterEnumInteger value) {
+    this.value = value;
+    return this;
+  }
+
+   /**
+   * Get value
+   * @return value
+  **/
+  @javax.annotation.Nonnull
+  @JsonProperty(JSON_PROPERTY_VALUE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public OuterEnumInteger getValue() {
+    return value;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_VALUE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setValue(OuterEnumInteger value) {
+    this.value = value;
+  }
+
+
+  /**
+   * Return true if this OuterObjectWithEnumProperty object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    OuterObjectWithEnumProperty outerObjectWithEnumProperty = (OuterObjectWithEnumProperty) o;
+    return Objects.equals(this.value, outerObjectWithEnumProperty.value);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(value);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class OuterObjectWithEnumProperty {\n");
+    sb.append("    value: ").append(toIndentedString(value)).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(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/SingleRefType.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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.HashMap;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Gets or Sets SingleRefType
+ */
+public enum SingleRefType {
+  
+  ADMIN("admin"),
+  
+  USER("user");
+
+  private String value;
+
+  SingleRefType(String value) {
+    this.value = value;
+  }
+
+  @JsonValue
+  public String getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+
+  @JsonCreator
+  public static SingleRefType fromValue(String value) {
+    for (SingleRefType b : SingleRefType.values()) {
+      if (b.value.equals(value)) {
+        return b;
+      }
+    }
+    throw new IllegalArgumentException("Unexpected value '" + value + "'");
+  }
+}
+

samples/client/petstore/java/native-async/src/main/java/org/openapitools/client/model/SpecialModelName.java

@@ -65,7 +65,7 @@ public class SpecialModelName {
 
 
   /**
-   * Return true if this $special[model.name] object is equal to o.
+   * Return true if this _special_model.name_ object is equal to o.
    */
   @Override
   public boolean equals(Object o) {
@@ -75,8 +75,8 @@ public class SpecialModelName {
     if (o == null || getClass() != o.getClass()) {
       return false;
     }
-    SpecialModelName $specialModelName = (SpecialModelName) o;
-    return Objects.equals(this.$specialPropertyName, $specialModelName.$specialPropertyName);
+    SpecialModelName specialModelName = (SpecialModelName) o;
+    return Objects.equals(this.$specialPropertyName, specialModelName.$specialPropertyName);
   }
 
   @Override

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/api/AnotherFakeApiTest.java

@@ -22,6 +22,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import java.util.concurrent.CompletableFuture;
 
@@ -44,9 +45,9 @@ public class AnotherFakeApiTest {
      */
     @Test
     public void call123testSpecialTagsTest() throws ApiException {
-        Client body = null;
+        Client client = null;
         CompletableFuture<Client> response = 
-        api.call123testSpecialTags(body);
+        api.call123testSpecialTags(client);
         
         // TODO: test validations
     }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/api/DefaultApiTest.java

@@ -0,0 +1,54 @@
+/*
+ * 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.api;
+
+import org.openapitools.client.ApiException;
+import org.openapitools.client.model.FooGetDefaultResponse;
+import org.junit.Test;
+import org.junit.Ignore;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * API tests for DefaultApi
+ */
+@Ignore
+public class DefaultApiTest {
+
+    private final DefaultApi api = new DefaultApi();
+
+    
+    /**
+     * 
+     *
+     * 
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void fooGetTest() throws ApiException {
+        CompletableFuture<FooGetDefaultResponse> response = 
+        api.fooGet();
+        
+        // TODO: test validations
+    }
+    
+}

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/api/FakeApiTest.java

@@ -16,13 +16,16 @@ package org.openapitools.client.api;
 import org.openapitools.client.ApiException;
 import java.math.BigDecimal;
 import org.openapitools.client.model.Client;
+import org.openapitools.client.model.EnumClass;
 import java.io.File;
 import org.openapitools.client.model.FileSchemaTestClass;
+import org.openapitools.client.model.HealthCheckResult;
 import java.time.LocalDate;
 import java.time.OffsetDateTime;
 import org.openapitools.client.model.OuterComposite;
+import org.openapitools.client.model.OuterObjectWithEnumProperty;
+import org.openapitools.client.model.Pet;
 import org.openapitools.client.model.User;
-import org.openapitools.client.model.XmlItem;
 import org.junit.Test;
 import org.junit.Ignore;
 
@@ -30,6 +33,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import java.util.concurrent.CompletableFuture;
 
@@ -43,18 +47,36 @@ public class FakeApiTest {
 
     
     /**
-     * creates an XmlItem
+     * Health check endpoint
      *
-     * this route creates an XmlItem
+     * 
      *
      * @throws ApiException
      *          if the Api call fails
      */
     @Test
-    public void createXmlItemTest() throws ApiException {
-        XmlItem xmlItem = null;
+    public void fakeHealthGetTest() throws ApiException {
+        CompletableFuture<HealthCheckResult> response = 
+        api.fakeHealthGet();
         
-        CompletableFuture<Void> response = api.createXmlItem(xmlItem);
+        // TODO: test validations
+    }
+    
+    /**
+     * test http signature authentication
+     *
+     * 
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void fakeHttpSignatureTestTest() throws ApiException {
+        Pet pet = null;
+        String query1 = null;
+        String header1 = null;
+        
+        CompletableFuture<Void> response = api.fakeHttpSignatureTest(pet, query1, header1);
         
         // TODO: test validations
     }
@@ -86,9 +108,9 @@ public class FakeApiTest {
      */
     @Test
     public void fakeOuterCompositeSerializeTest() throws ApiException {
-        OuterComposite body = null;
+        OuterComposite outerComposite = null;
         CompletableFuture<OuterComposite> response = 
-        api.fakeOuterCompositeSerialize(body);
+        api.fakeOuterCompositeSerialize(outerComposite);
         
         // TODO: test validations
     }
@@ -130,16 +152,50 @@ public class FakeApiTest {
     /**
      * 
      *
-     * For this test, the body for this request much reference a schema named &#x60;File&#x60;.
+     * Test serialization of enum (int) properties with examples
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void fakePropertyEnumIntegerSerializeTest() throws ApiException {
+        OuterObjectWithEnumProperty outerObjectWithEnumProperty = null;
+        CompletableFuture<OuterObjectWithEnumProperty> response = 
+        api.fakePropertyEnumIntegerSerialize(outerObjectWithEnumProperty);
+        
+        // TODO: test validations
+    }
+    
+    /**
+     * 
+     *
+     * For this test, the body has to be a binary file.
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testBodyWithBinaryTest() throws ApiException {
+        File body = null;
+        
+        CompletableFuture<Void> response = api.testBodyWithBinary(body);
+        
+        // TODO: test validations
+    }
+    
+    /**
+     * 
+     *
+     * For this test, the body for this request must reference a schema named &#x60;File&#x60;.
      *
      * @throws ApiException
      *          if the Api call fails
      */
     @Test
     public void testBodyWithFileSchemaTest() throws ApiException {
-        FileSchemaTestClass body = null;
+        FileSchemaTestClass fileSchemaTestClass = null;
         
-        CompletableFuture<Void> response = api.testBodyWithFileSchema(body);
+        CompletableFuture<Void> response = api.testBodyWithFileSchema(fileSchemaTestClass);
         
         // TODO: test validations
     }
@@ -155,9 +211,9 @@ public class FakeApiTest {
     @Test
     public void testBodyWithQueryParamsTest() throws ApiException {
         String query = null;
-        User body = null;
+        User user = null;
         
-        CompletableFuture<Void> response = api.testBodyWithQueryParams(query, body);
+        CompletableFuture<Void> response = api.testBodyWithQueryParams(query, user);
         
         // TODO: test validations
     }
@@ -172,17 +228,17 @@ public class FakeApiTest {
      */
     @Test
     public void testClientModelTest() throws ApiException {
-        Client body = null;
+        Client client = null;
         CompletableFuture<Client> response = 
-        api.testClientModel(body);
+        api.testClientModel(client);
         
         // TODO: test validations
     }
     
     /**
-     * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
+     * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
      *
-     * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
+     * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
      *
      * @throws ApiException
      *          if the Api call fails
@@ -225,10 +281,11 @@ public class FakeApiTest {
         String enumQueryString = null;
         Integer enumQueryInteger = null;
         Double enumQueryDouble = null;
+        List<EnumClass> enumQueryModelArray = null;
         List<String> enumFormStringArray = null;
         String enumFormString = null;
         
-        CompletableFuture<Void> response = api.testEnumParameters(enumHeaderStringArray, enumHeaderString, enumQueryStringArray, enumQueryString, enumQueryInteger, enumQueryDouble, enumFormStringArray, enumFormString);
+        CompletableFuture<Void> response = api.testEnumParameters(enumHeaderStringArray, enumHeaderString, enumQueryStringArray, enumQueryString, enumQueryInteger, enumQueryDouble, enumQueryModelArray, enumFormStringArray, enumFormString);
         
         // TODO: test validations
     }
@@ -274,9 +331,9 @@ public class FakeApiTest {
      */
     @Test
     public void testInlineAdditionalPropertiesTest() throws ApiException {
-        Map<String, String> param = null;
+        Map<String, String> requestBody = null;
         
-        CompletableFuture<Void> response = api.testInlineAdditionalProperties(param);
+        CompletableFuture<Void> response = api.testInlineAdditionalProperties(requestBody);
         
         // TODO: test validations
     }
@@ -314,8 +371,10 @@ public class FakeApiTest {
         List<String> http = null;
         List<String> url = null;
         List<String> context = null;
+        String allowEmpty = null;
+        Map<String, String> language = null;
         
-        CompletableFuture<Void> response = api.testQueryParameterCollectionFormat(pipe, ioutil, http, url, context);
+        CompletableFuture<Void> response = api.testQueryParameterCollectionFormat(pipe, ioutil, http, url, context, allowEmpty, language);
         
         // TODO: test validations
     }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/api/FakeClassnameTags123ApiTest.java

@@ -22,6 +22,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import java.util.concurrent.CompletableFuture;
 
@@ -44,9 +45,9 @@ public class FakeClassnameTags123ApiTest {
      */
     @Test
     public void testClassnameTest() throws ApiException {
-        Client body = null;
+        Client client = null;
         CompletableFuture<Client> response = 
-        api.testClassname(body);
+        api.testClassname(client);
         
         // TODO: test validations
     }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/api/PetApiTest.java

@@ -25,6 +25,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import java.util.concurrent.CompletableFuture;
 
@@ -47,9 +48,9 @@ public class PetApiTest {
      */
     @Test
     public void addPetTest() throws ApiException {
-        Pet body = null;
+        Pet pet = null;
         
-        CompletableFuture<Void> response = api.addPet(body);
+        CompletableFuture<Void> response = api.addPet(pet);
         
         // TODO: test validations
     }
@@ -133,9 +134,9 @@ public class PetApiTest {
      */
     @Test
     public void updatePetTest() throws ApiException {
-        Pet body = null;
+        Pet pet = null;
         
-        CompletableFuture<Void> response = api.updatePet(body);
+        CompletableFuture<Void> response = api.updatePet(pet);
         
         // TODO: test validations
     }
@@ -171,9 +172,9 @@ public class PetApiTest {
     public void uploadFileTest() throws ApiException {
         Long petId = null;
         String additionalMetadata = null;
-        File file = null;
+        File _file = null;
         CompletableFuture<ModelApiResponse> response = 
-        api.uploadFile(petId, additionalMetadata, file);
+        api.uploadFile(petId, additionalMetadata, _file);
         
         // TODO: test validations
     }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/api/StoreApiTest.java

@@ -22,6 +22,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import java.util.concurrent.CompletableFuture;
 
@@ -94,9 +95,9 @@ public class StoreApiTest {
      */
     @Test
     public void placeOrderTest() throws ApiException {
-        Order body = null;
+        Order order = null;
         CompletableFuture<Order> response = 
-        api.placeOrder(body);
+        api.placeOrder(order);
         
         // TODO: test validations
     }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/api/UserApiTest.java

@@ -14,6 +14,7 @@
 package org.openapitools.client.api;
 
 import org.openapitools.client.ApiException;
+import java.time.OffsetDateTime;
 import org.openapitools.client.model.User;
 import org.junit.Test;
 import org.junit.Ignore;
@@ -22,6 +23,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import java.util.concurrent.CompletableFuture;
 
@@ -44,9 +46,9 @@ public class UserApiTest {
      */
     @Test
     public void createUserTest() throws ApiException {
-        User body = null;
+        User user = null;
         
-        CompletableFuture<Void> response = api.createUser(body);
+        CompletableFuture<Void> response = api.createUser(user);
         
         // TODO: test validations
     }
@@ -61,9 +63,9 @@ public class UserApiTest {
      */
     @Test
     public void createUsersWithArrayInputTest() throws ApiException {
-        List<User> body = null;
+        List<User> user = null;
         
-        CompletableFuture<Void> response = api.createUsersWithArrayInput(body);
+        CompletableFuture<Void> response = api.createUsersWithArrayInput(user);
         
         // TODO: test validations
     }
@@ -78,9 +80,9 @@ public class UserApiTest {
      */
     @Test
     public void createUsersWithListInputTest() throws ApiException {
-        List<User> body = null;
+        List<User> user = null;
         
-        CompletableFuture<Void> response = api.createUsersWithListInput(body);
+        CompletableFuture<Void> response = api.createUsersWithListInput(user);
         
         // TODO: test validations
     }
@@ -164,9 +166,9 @@ public class UserApiTest {
     @Test
     public void updateUserTest() throws ApiException {
         String username = null;
-        User body = null;
+        User user = null;
         
-        CompletableFuture<Void> response = api.updateUser(username, body);
+        CompletableFuture<Void> response = api.updateUser(username, user);
         
         // TODO: test validations
     }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/AdditionalPropertiesClassTest.java

@@ -18,9 +18,7 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
-import java.math.BigDecimal;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import org.junit.Assert;
 import org.junit.Ignore;
@@ -42,91 +40,19 @@ public class AdditionalPropertiesClassTest {
     }
 
     /**
-     * Test the property 'mapString'
+     * Test the property 'mapProperty'
      */
     @Test
-    public void mapStringTest() {
-        // TODO: test mapString
+    public void mapPropertyTest() {
+        // TODO: test mapProperty
     }
 
     /**
-     * Test the property 'mapNumber'
+     * Test the property 'mapOfMapProperty'
      */
     @Test
-    public void mapNumberTest() {
-        // TODO: test mapNumber
-    }
-
-    /**
-     * Test the property 'mapInteger'
-     */
-    @Test
-    public void mapIntegerTest() {
-        // TODO: test mapInteger
-    }
-
-    /**
-     * Test the property 'mapBoolean'
-     */
-    @Test
-    public void mapBooleanTest() {
-        // TODO: test mapBoolean
-    }
-
-    /**
-     * Test the property 'mapArrayInteger'
-     */
-    @Test
-    public void mapArrayIntegerTest() {
-        // TODO: test mapArrayInteger
-    }
-
-    /**
-     * Test the property 'mapArrayAnytype'
-     */
-    @Test
-    public void mapArrayAnytypeTest() {
-        // TODO: test mapArrayAnytype
-    }
-
-    /**
-     * Test the property 'mapMapString'
-     */
-    @Test
-    public void mapMapStringTest() {
-        // TODO: test mapMapString
-    }
-
-    /**
-     * Test the property 'mapMapAnytype'
-     */
-    @Test
-    public void mapMapAnytypeTest() {
-        // TODO: test mapMapAnytype
-    }
-
-    /**
-     * Test the property 'anytype1'
-     */
-    @Test
-    public void anytype1Test() {
-        // TODO: test anytype1
-    }
-
-    /**
-     * Test the property 'anytype2'
-     */
-    @Test
-    public void anytype2Test() {
-        // TODO: test anytype2
-    }
-
-    /**
-     * Test the property 'anytype3'
-     */
-    @Test
-    public void anytype3Test() {
-        // TODO: test anytype3
+    public void mapOfMapPropertyTest() {
+        // TODO: test mapOfMapProperty
     }
 
 }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/AdditionalPropertiesIntegerTest.java

@@ -1,50 +0,0 @@
-/*
- * 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 com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonTypeName;
-import com.fasterxml.jackson.annotation.JsonValue;
-import java.util.HashMap;
-import java.util.Map;
-import org.junit.Assert;
-import org.junit.Ignore;
-import org.junit.Test;
-
-
-/**
- * Model tests for AdditionalPropertiesInteger
- */
-public class AdditionalPropertiesIntegerTest {
-    private final AdditionalPropertiesInteger model = new AdditionalPropertiesInteger();
-
-    /**
-     * Model tests for AdditionalPropertiesInteger
-     */
-    @Test
-    public void testAdditionalPropertiesInteger() {
-        // TODO: test AdditionalPropertiesInteger
-    }
-
-    /**
-     * Test the property 'name'
-     */
-    @Test
-    public void nameTest() {
-        // TODO: test name
-    }
-
-}

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/AdditionalPropertiesNumberTest.java

@@ -1,51 +0,0 @@
-/*
- * 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 com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonTypeName;
-import com.fasterxml.jackson.annotation.JsonValue;
-import java.math.BigDecimal;
-import java.util.HashMap;
-import java.util.Map;
-import org.junit.Assert;
-import org.junit.Ignore;
-import org.junit.Test;
-
-
-/**
- * Model tests for AdditionalPropertiesNumber
- */
-public class AdditionalPropertiesNumberTest {
-    private final AdditionalPropertiesNumber model = new AdditionalPropertiesNumber();
-
-    /**
-     * Model tests for AdditionalPropertiesNumber
-     */
-    @Test
-    public void testAdditionalPropertiesNumber() {
-        // TODO: test AdditionalPropertiesNumber
-    }
-
-    /**
-     * Test the property 'name'
-     */
-    @Test
-    public void nameTest() {
-        // TODO: test name
-    }
-
-}

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/AllOfWithSingleRefTest.java

@@ -18,34 +18,40 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import org.openapitools.client.model.SingleRefType;
 import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;
 
 
 /**
- * Model tests for AdditionalPropertiesArray
+ * Model tests for AllOfWithSingleRef
  */
-public class AdditionalPropertiesArrayTest {
-    private final AdditionalPropertiesArray model = new AdditionalPropertiesArray();
+public class AllOfWithSingleRefTest {
+    private final AllOfWithSingleRef model = new AllOfWithSingleRef();
 
     /**
-     * Model tests for AdditionalPropertiesArray
+     * Model tests for AllOfWithSingleRef
      */
     @Test
-    public void testAdditionalPropertiesArray() {
-        // TODO: test AdditionalPropertiesArray
+    public void testAllOfWithSingleRef() {
+        // TODO: test AllOfWithSingleRef
     }
 
     /**
-     * Test the property 'name'
+     * Test the property 'username'
      */
     @Test
-    public void nameTest() {
-        // TODO: test name
+    public void usernameTest() {
+        // TODO: test username
+    }
+
+    /**
+     * Test the property 'singleRefType'
+     */
+    @Test
+    public void singleRefTypeTest() {
+        // TODO: test singleRefType
     }
 
 }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/AnimalTest.java

@@ -21,7 +21,6 @@ import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
-import org.openapitools.client.model.BigCat;
 import org.openapitools.client.model.Cat;
 import org.openapitools.client.model.Dog;
 import org.junit.Assert;

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/BigCatTest.java

@@ -1,76 +0,0 @@
-/*
- * 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 com.fasterxml.jackson.annotation.JsonIgnoreProperties;
-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.JsonTypeName;
-import com.fasterxml.jackson.annotation.JsonValue;
-import org.openapitools.client.model.Cat;
-import org.junit.Assert;
-import org.junit.Ignore;
-import org.junit.Test;
-
-
-/**
- * Model tests for BigCat
- */
-public class BigCatTest {
-    private final BigCat model = new BigCat();
-
-    /**
-     * Model tests for BigCat
-     */
-    @Test
-    public void testBigCat() {
-        // TODO: test BigCat
-    }
-
-    /**
-     * Test the property 'className'
-     */
-    @Test
-    public void classNameTest() {
-        // TODO: test className
-    }
-
-    /**
-     * Test the property 'color'
-     */
-    @Test
-    public void colorTest() {
-        // TODO: test color
-    }
-
-    /**
-     * Test the property 'declawed'
-     */
-    @Test
-    public void declawedTest() {
-        // TODO: test declawed
-    }
-
-    /**
-     * Test the property 'kind'
-     */
-    @Test
-    public void kindTest() {
-        // TODO: test kind
-    }
-
-}

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/CatTest.java

@@ -22,7 +22,6 @@ import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
 import org.openapitools.client.model.Animal;
-import org.openapitools.client.model.BigCat;
 import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/DeprecatedObjectTest.java

@@ -18,25 +18,23 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
-import java.util.HashMap;
-import java.util.Map;
 import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;
 
 
 /**
- * Model tests for AdditionalPropertiesString
+ * Model tests for DeprecatedObject
  */
-public class AdditionalPropertiesStringTest {
-    private final AdditionalPropertiesString model = new AdditionalPropertiesString();
+public class DeprecatedObjectTest {
+    private final DeprecatedObject model = new DeprecatedObject();
 
     /**
-     * Model tests for AdditionalPropertiesString
+     * Model tests for DeprecatedObject
      */
     @Test
-    public void testAdditionalPropertiesString() {
-        // TODO: test AdditionalPropertiesString
+    public void testDeprecatedObject() {
+        // TODO: test DeprecatedObject
     }
 
     /**

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/EnumTestTest.java

@@ -19,6 +19,13 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
 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 org.openapitools.jackson.nullable.JsonNullable;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.util.NoSuchElementException;
 import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;
@@ -78,4 +85,28 @@ public class EnumTestTest {
         // TODO: test outerEnum
     }
 
+    /**
+     * Test the property 'outerEnumInteger'
+     */
+    @Test
+    public void outerEnumIntegerTest() {
+        // TODO: test outerEnumInteger
+    }
+
+    /**
+     * Test the property 'outerEnumDefaultValue'
+     */
+    @Test
+    public void outerEnumDefaultValueTest() {
+        // TODO: test outerEnumDefaultValue
+    }
+
+    /**
+     * Test the property 'outerEnumIntegerDefaultValue'
+     */
+    @Test
+    public void outerEnumIntegerDefaultValueTest() {
+        // TODO: test outerEnumIntegerDefaultValue
+    }
+
 }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/FooGetDefaultResponseTest.java

@@ -18,33 +18,32 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
-import java.util.HashMap;
-import java.util.Map;
+import org.openapitools.client.model.Foo;
 import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;
 
 
 /**
- * Model tests for AdditionalPropertiesObject
+ * Model tests for FooGetDefaultResponse
  */
-public class AdditionalPropertiesObjectTest {
-    private final AdditionalPropertiesObject model = new AdditionalPropertiesObject();
+public class FooGetDefaultResponseTest {
+    private final FooGetDefaultResponse model = new FooGetDefaultResponse();
 
     /**
-     * Model tests for AdditionalPropertiesObject
+     * Model tests for FooGetDefaultResponse
      */
     @Test
-    public void testAdditionalPropertiesObject() {
-        // TODO: test AdditionalPropertiesObject
+    public void testFooGetDefaultResponse() {
+        // TODO: test FooGetDefaultResponse
     }
 
     /**
-     * Test the property 'name'
+     * Test the property 'string'
      */
     @Test
-    public void nameTest() {
-        // TODO: test name
+    public void stringTest() {
+        // TODO: test string
     }
 
 }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/FooTest.java

@@ -24,25 +24,25 @@ import org.junit.Test;
 
 
 /**
- * Model tests for BigCatAllOf
+ * Model tests for Foo
  */
-public class BigCatAllOfTest {
-    private final BigCatAllOf model = new BigCatAllOf();
+public class FooTest {
+    private final Foo model = new Foo();
 
     /**
-     * Model tests for BigCatAllOf
+     * Model tests for Foo
      */
     @Test
-    public void testBigCatAllOf() {
-        // TODO: test BigCatAllOf
+    public void testFoo() {
+        // TODO: test Foo
     }
 
     /**
-     * Test the property 'kind'
+     * Test the property 'bar'
      */
     @Test
-    public void kindTest() {
-        // TODO: test kind
+    public void barTest() {
+        // TODO: test bar
     }
 
 }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/FormatTestTest.java

@@ -90,6 +90,14 @@ public class FormatTestTest {
         // TODO: test _double
     }
 
+    /**
+     * Test the property 'decimal'
+     */
+    @Test
+    public void decimalTest() {
+        // TODO: test decimal
+    }
+
     /**
      * Test the property 'string'
      */
@@ -147,11 +155,19 @@ public class FormatTestTest {
     }
 
     /**
-     * Test the property 'bigDecimal'
+     * Test the property 'patternWithDigits'
      */
     @Test
-    public void bigDecimalTest() {
-        // TODO: test bigDecimal
+    public void patternWithDigitsTest() {
+        // TODO: test patternWithDigits
+    }
+
+    /**
+     * Test the property 'patternWithDigitsAndDelimiter'
+     */
+    @Test
+    public void patternWithDigitsAndDelimiterTest() {
+        // TODO: test patternWithDigitsAndDelimiter
     }
 
 }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/HealthCheckResultTest.java

@@ -18,33 +18,35 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
-import java.util.HashMap;
-import java.util.Map;
+import org.openapitools.jackson.nullable.JsonNullable;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.util.NoSuchElementException;
 import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;
 
 
 /**
- * Model tests for AdditionalPropertiesBoolean
+ * Model tests for HealthCheckResult
  */
-public class AdditionalPropertiesBooleanTest {
-    private final AdditionalPropertiesBoolean model = new AdditionalPropertiesBoolean();
+public class HealthCheckResultTest {
+    private final HealthCheckResult model = new HealthCheckResult();
 
     /**
-     * Model tests for AdditionalPropertiesBoolean
+     * Model tests for HealthCheckResult
      */
     @Test
-    public void testAdditionalPropertiesBoolean() {
-        // TODO: test AdditionalPropertiesBoolean
+    public void testHealthCheckResult() {
+        // TODO: test HealthCheckResult
     }
 
     /**
-     * Test the property 'name'
+     * Test the property 'nullableMessage'
      */
     @Test
-    public void nameTest() {
-        // TODO: test name
+    public void nullableMessageTest() {
+        // TODO: test nullableMessage
     }
 
 }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/NullableClassTest.java

@@ -0,0 +1,147 @@
+/*
+ * 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 com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+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 org.openapitools.jackson.nullable.JsonNullable;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.util.NoSuchElementException;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for NullableClass
+ */
+public class NullableClassTest {
+    private final NullableClass model = new NullableClass();
+
+    /**
+     * Model tests for NullableClass
+     */
+    @Test
+    public void testNullableClass() {
+        // TODO: test NullableClass
+    }
+
+    /**
+     * Test the property 'integerProp'
+     */
+    @Test
+    public void integerPropTest() {
+        // TODO: test integerProp
+    }
+
+    /**
+     * Test the property 'numberProp'
+     */
+    @Test
+    public void numberPropTest() {
+        // TODO: test numberProp
+    }
+
+    /**
+     * Test the property 'booleanProp'
+     */
+    @Test
+    public void booleanPropTest() {
+        // TODO: test booleanProp
+    }
+
+    /**
+     * Test the property 'stringProp'
+     */
+    @Test
+    public void stringPropTest() {
+        // TODO: test stringProp
+    }
+
+    /**
+     * Test the property 'dateProp'
+     */
+    @Test
+    public void datePropTest() {
+        // TODO: test dateProp
+    }
+
+    /**
+     * Test the property 'datetimeProp'
+     */
+    @Test
+    public void datetimePropTest() {
+        // TODO: test datetimeProp
+    }
+
+    /**
+     * Test the property 'arrayNullableProp'
+     */
+    @Test
+    public void arrayNullablePropTest() {
+        // TODO: test arrayNullableProp
+    }
+
+    /**
+     * Test the property 'arrayAndItemsNullableProp'
+     */
+    @Test
+    public void arrayAndItemsNullablePropTest() {
+        // TODO: test arrayAndItemsNullableProp
+    }
+
+    /**
+     * Test the property 'arrayItemsNullable'
+     */
+    @Test
+    public void arrayItemsNullableTest() {
+        // TODO: test arrayItemsNullable
+    }
+
+    /**
+     * Test the property 'objectNullableProp'
+     */
+    @Test
+    public void objectNullablePropTest() {
+        // TODO: test objectNullableProp
+    }
+
+    /**
+     * Test the property 'objectAndItemsNullableProp'
+     */
+    @Test
+    public void objectAndItemsNullablePropTest() {
+        // TODO: test objectAndItemsNullableProp
+    }
+
+    /**
+     * Test the property 'objectItemsNullable'
+     */
+    @Test
+    public void objectItemsNullableTest() {
+        // TODO: test objectItemsNullable
+    }
+
+}

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/ObjectWithDeprecatedFieldsTest.java

@@ -21,63 +21,56 @@ import com.fasterxml.jackson.annotation.JsonValue;
 import java.math.BigDecimal;
 import java.util.ArrayList;
 import java.util.List;
+import org.openapitools.client.model.DeprecatedObject;
 import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;
 
 
 /**
- * Model tests for TypeHolderDefault
+ * Model tests for ObjectWithDeprecatedFields
  */
-public class TypeHolderDefaultTest {
-    private final TypeHolderDefault model = new TypeHolderDefault();
+public class ObjectWithDeprecatedFieldsTest {
+    private final ObjectWithDeprecatedFields model = new ObjectWithDeprecatedFields();
 
     /**
-     * Model tests for TypeHolderDefault
+     * Model tests for ObjectWithDeprecatedFields
      */
     @Test
-    public void testTypeHolderDefault() {
-        // TODO: test TypeHolderDefault
+    public void testObjectWithDeprecatedFields() {
+        // TODO: test ObjectWithDeprecatedFields
     }
 
     /**
-     * Test the property 'stringItem'
+     * Test the property 'uuid'
      */
     @Test
-    public void stringItemTest() {
-        // TODO: test stringItem
+    public void uuidTest() {
+        // TODO: test uuid
     }
 
     /**
-     * Test the property 'numberItem'
+     * Test the property 'id'
      */
     @Test
-    public void numberItemTest() {
-        // TODO: test numberItem
+    public void idTest() {
+        // TODO: test id
     }
 
     /**
-     * Test the property 'integerItem'
+     * Test the property 'deprecatedRef'
      */
     @Test
-    public void integerItemTest() {
-        // TODO: test integerItem
+    public void deprecatedRefTest() {
+        // TODO: test deprecatedRef
     }
 
     /**
-     * Test the property 'boolItem'
+     * Test the property 'bars'
      */
     @Test
-    public void boolItemTest() {
-        // TODO: test boolItem
-    }
-
-    /**
-     * Test the property 'arrayItem'
-     */
-    @Test
-    public void arrayItemTest() {
-        // TODO: test arrayItem
+    public void barsTest() {
+        // TODO: test bars
     }
 
 }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/OuterEnumDefaultValueTest.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.model;
+
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for OuterEnumDefaultValue
+ */
+public class OuterEnumDefaultValueTest {
+    /**
+     * Model tests for OuterEnumDefaultValue
+     */
+    @Test
+    public void testOuterEnumDefaultValue() {
+        // TODO: test OuterEnumDefaultValue
+    }
+
+}

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/OuterEnumIntegerDefaultValueTest.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.model;
+
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for OuterEnumIntegerDefaultValue
+ */
+public class OuterEnumIntegerDefaultValueTest {
+    /**
+     * Model tests for OuterEnumIntegerDefaultValue
+     */
+    @Test
+    public void testOuterEnumIntegerDefaultValue() {
+        // TODO: test OuterEnumIntegerDefaultValue
+    }
+
+}

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/OuterEnumIntegerTest.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.model;
+
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for OuterEnumInteger
+ */
+public class OuterEnumIntegerTest {
+    /**
+     * Model tests for OuterEnumInteger
+     */
+    @Test
+    public void testOuterEnumInteger() {
+        // TODO: test OuterEnumInteger
+    }
+
+}

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/OuterObjectWithEnumPropertyTest.java

@@ -18,33 +18,32 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.annotation.JsonValue;
-import java.util.HashMap;
-import java.util.Map;
+import org.openapitools.client.model.OuterEnumInteger;
 import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;
 
 
 /**
- * Model tests for AdditionalPropertiesAnyType
+ * Model tests for OuterObjectWithEnumProperty
  */
-public class AdditionalPropertiesAnyTypeTest {
-    private final AdditionalPropertiesAnyType model = new AdditionalPropertiesAnyType();
+public class OuterObjectWithEnumPropertyTest {
+    private final OuterObjectWithEnumProperty model = new OuterObjectWithEnumProperty();
 
     /**
-     * Model tests for AdditionalPropertiesAnyType
+     * Model tests for OuterObjectWithEnumProperty
      */
     @Test
-    public void testAdditionalPropertiesAnyType() {
-        // TODO: test AdditionalPropertiesAnyType
+    public void testOuterObjectWithEnumProperty() {
+        // TODO: test OuterObjectWithEnumProperty
     }
 
     /**
-     * Test the property 'name'
+     * Test the property 'value'
      */
     @Test
-    public void nameTest() {
-        // TODO: test name
+    public void valueTest() {
+        // TODO: test value
     }
 
 }

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/SingleRefTypeTest.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.model;
+
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for SingleRefType
+ */
+public class SingleRefTypeTest {
+    /**
+     * Model tests for SingleRefType
+     */
+    @Test
+    public void testSingleRefType() {
+        // TODO: test SingleRefType
+    }
+
+}

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/TypeHolderExampleTest.java

@@ -1,91 +0,0 @@
-/*
- * 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 com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonTypeName;
-import com.fasterxml.jackson.annotation.JsonValue;
-import java.math.BigDecimal;
-import java.util.ArrayList;
-import java.util.List;
-import org.junit.Assert;
-import org.junit.Ignore;
-import org.junit.Test;
-
-
-/**
- * Model tests for TypeHolderExample
- */
-public class TypeHolderExampleTest {
-    private final TypeHolderExample model = new TypeHolderExample();
-
-    /**
-     * Model tests for TypeHolderExample
-     */
-    @Test
-    public void testTypeHolderExample() {
-        // TODO: test TypeHolderExample
-    }
-
-    /**
-     * Test the property 'stringItem'
-     */
-    @Test
-    public void stringItemTest() {
-        // TODO: test stringItem
-    }
-
-    /**
-     * Test the property 'numberItem'
-     */
-    @Test
-    public void numberItemTest() {
-        // TODO: test numberItem
-    }
-
-    /**
-     * Test the property 'floatItem'
-     */
-    @Test
-    public void floatItemTest() {
-        // TODO: test floatItem
-    }
-
-    /**
-     * Test the property 'integerItem'
-     */
-    @Test
-    public void integerItemTest() {
-        // TODO: test integerItem
-    }
-
-    /**
-     * Test the property 'boolItem'
-     */
-    @Test
-    public void boolItemTest() {
-        // TODO: test boolItem
-    }
-
-    /**
-     * Test the property 'arrayItem'
-     */
-    @Test
-    public void arrayItemTest() {
-        // TODO: test arrayItem
-    }
-
-}

samples/client/petstore/java/native-async/src/test/java/org/openapitools/client/model/XmlItemTest.java

@@ -1,275 +0,0 @@
-/*
- * 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 com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.annotation.JsonProperty;
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonTypeName;
-import com.fasterxml.jackson.annotation.JsonValue;
-import java.math.BigDecimal;
-import java.util.ArrayList;
-import java.util.List;
-import org.junit.Assert;
-import org.junit.Ignore;
-import org.junit.Test;
-
-
-/**
- * Model tests for XmlItem
- */
-public class XmlItemTest {
-    private final XmlItem model = new XmlItem();
-
-    /**
-     * Model tests for XmlItem
-     */
-    @Test
-    public void testXmlItem() {
-        // TODO: test XmlItem
-    }
-
-    /**
-     * Test the property 'attributeString'
-     */
-    @Test
-    public void attributeStringTest() {
-        // TODO: test attributeString
-    }
-
-    /**
-     * Test the property 'attributeNumber'
-     */
-    @Test
-    public void attributeNumberTest() {
-        // TODO: test attributeNumber
-    }
-
-    /**
-     * Test the property 'attributeInteger'
-     */
-    @Test
-    public void attributeIntegerTest() {
-        // TODO: test attributeInteger
-    }
-
-    /**
-     * Test the property 'attributeBoolean'
-     */
-    @Test
-    public void attributeBooleanTest() {
-        // TODO: test attributeBoolean
-    }
-
-    /**
-     * Test the property 'wrappedArray'
-     */
-    @Test
-    public void wrappedArrayTest() {
-        // TODO: test wrappedArray
-    }
-
-    /**
-     * Test the property 'nameString'
-     */
-    @Test
-    public void nameStringTest() {
-        // TODO: test nameString
-    }
-
-    /**
-     * Test the property 'nameNumber'
-     */
-    @Test
-    public void nameNumberTest() {
-        // TODO: test nameNumber
-    }
-
-    /**
-     * Test the property 'nameInteger'
-     */
-    @Test
-    public void nameIntegerTest() {
-        // TODO: test nameInteger
-    }
-
-    /**
-     * Test the property 'nameBoolean'
-     */
-    @Test
-    public void nameBooleanTest() {
-        // TODO: test nameBoolean
-    }
-
-    /**
-     * Test the property 'nameArray'
-     */
-    @Test
-    public void nameArrayTest() {
-        // TODO: test nameArray
-    }
-
-    /**
-     * Test the property 'nameWrappedArray'
-     */
-    @Test
-    public void nameWrappedArrayTest() {
-        // TODO: test nameWrappedArray
-    }
-
-    /**
-     * Test the property 'prefixString'
-     */
-    @Test
-    public void prefixStringTest() {
-        // TODO: test prefixString
-    }
-
-    /**
-     * Test the property 'prefixNumber'
-     */
-    @Test
-    public void prefixNumberTest() {
-        // TODO: test prefixNumber
-    }
-
-    /**
-     * Test the property 'prefixInteger'
-     */
-    @Test
-    public void prefixIntegerTest() {
-        // TODO: test prefixInteger
-    }
-
-    /**
-     * Test the property 'prefixBoolean'
-     */
-    @Test
-    public void prefixBooleanTest() {
-        // TODO: test prefixBoolean
-    }
-
-    /**
-     * Test the property 'prefixArray'
-     */
-    @Test
-    public void prefixArrayTest() {
-        // TODO: test prefixArray
-    }
-
-    /**
-     * Test the property 'prefixWrappedArray'
-     */
-    @Test
-    public void prefixWrappedArrayTest() {
-        // TODO: test prefixWrappedArray
-    }
-
-    /**
-     * Test the property 'namespaceString'
-     */
-    @Test
-    public void namespaceStringTest() {
-        // TODO: test namespaceString
-    }
-
-    /**
-     * Test the property 'namespaceNumber'
-     */
-    @Test
-    public void namespaceNumberTest() {
-        // TODO: test namespaceNumber
-    }
-
-    /**
-     * Test the property 'namespaceInteger'
-     */
-    @Test
-    public void namespaceIntegerTest() {
-        // TODO: test namespaceInteger
-    }
-
-    /**
-     * Test the property 'namespaceBoolean'
-     */
-    @Test
-    public void namespaceBooleanTest() {
-        // TODO: test namespaceBoolean
-    }
-
-    /**
-     * Test the property 'namespaceArray'
-     */
-    @Test
-    public void namespaceArrayTest() {
-        // TODO: test namespaceArray
-    }
-
-    /**
-     * Test the property 'namespaceWrappedArray'
-     */
-    @Test
-    public void namespaceWrappedArrayTest() {
-        // TODO: test namespaceWrappedArray
-    }
-
-    /**
-     * Test the property 'prefixNsString'
-     */
-    @Test
-    public void prefixNsStringTest() {
-        // TODO: test prefixNsString
-    }
-
-    /**
-     * Test the property 'prefixNsNumber'
-     */
-    @Test
-    public void prefixNsNumberTest() {
-        // TODO: test prefixNsNumber
-    }
-
-    /**
-     * Test the property 'prefixNsInteger'
-     */
-    @Test
-    public void prefixNsIntegerTest() {
-        // TODO: test prefixNsInteger
-    }
-
-    /**
-     * Test the property 'prefixNsBoolean'
-     */
-    @Test
-    public void prefixNsBooleanTest() {
-        // TODO: test prefixNsBoolean
-    }
-
-    /**
-     * Test the property 'prefixNsArray'
-     */
-    @Test
-    public void prefixNsArrayTest() {
-        // TODO: test prefixNsArray
-    }
-
-    /**
-     * Test the property 'prefixNsWrappedArray'
-     */
-    @Test
-    public void prefixNsWrappedArrayTest() {
-        // TODO: test prefixNsWrappedArray
-    }
-
-}