Merge remote-tracking branch 'origin/master' into 7.0.x

samples/client/echo_api/java/apache-httpclient/.openapi-generator/FILES

@@ -13,6 +13,7 @@ docs/DataQueryAllOf.md
 docs/DefaultValue.md
 docs/FormApi.md
 docs/HeaderApi.md
+docs/NumberPropertiesOnly.md
 docs/PathApi.md
 docs/Pet.md
 docs/Query.md
@@ -53,6 +54,7 @@ src/main/java/org/openapitools/client/model/Category.java
 src/main/java/org/openapitools/client/model/DataQuery.java
 src/main/java/org/openapitools/client/model/DataQueryAllOf.java
 src/main/java/org/openapitools/client/model/DefaultValue.java
+src/main/java/org/openapitools/client/model/NumberPropertiesOnly.java
 src/main/java/org/openapitools/client/model/Pet.java
 src/main/java/org/openapitools/client/model/Query.java
 src/main/java/org/openapitools/client/model/StringEnumRef.java

samples/client/echo_api/java/apache-httpclient/README.md

@@ -84,12 +84,11 @@ public class BodyApiExample {
         defaultClient.setBasePath("http://localhost:3000");
         
         BodyApi apiInstance = new BodyApi(defaultClient);
-        Pet pet = new Pet(); // Pet | Pet object that needs to be added to the store
         try {
-            Pet result = apiInstance.testEchoBodyPet(pet);
+            File result = apiInstance.testBinaryGif();
             System.out.println(result);
         } catch (ApiException e) {
-            System.err.println("Exception when calling BodyApi#testEchoBodyPet");
+            System.err.println("Exception when calling BodyApi#testBinaryGif");
             System.err.println("Status code: " + e.getCode());
             System.err.println("Reason: " + e.getResponseBody());
             System.err.println("Response headers: " + e.getResponseHeaders());
@@ -106,6 +105,7 @@ All URIs are relative to *http://localhost:3000*
 
 Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
+*BodyApi* | [**testBinaryGif**](docs/BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body
 *BodyApi* | [**testEchoBodyPet**](docs/BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
 *FormApi* | [**testFormIntegerBooleanString**](docs/FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
@@ -127,6 +127,7 @@ Class | Method | HTTP request | Description
  - [DataQuery](docs/DataQuery.md)
  - [DataQueryAllOf](docs/DataQueryAllOf.md)
  - [DefaultValue](docs/DefaultValue.md)
+ - [NumberPropertiesOnly](docs/NumberPropertiesOnly.md)
  - [Pet](docs/Pet.md)
  - [Query](docs/Query.md)
  - [StringEnumRef](docs/StringEnumRef.md)

samples/client/echo_api/java/apache-httpclient/api/openapi.yaml

@@ -326,6 +326,22 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /binary/gif:
+    post:
+      description: Test binary (gif) response body
+      operationId: test/binary/gif
+      responses:
+        "200":
+          content:
+            image/gif:
+              schema:
+                format: binary
+                type: string
+          description: Successful operation
+      summary: Test binary (gif) response body
+      tags:
+      - body
+      x-accepts: image/gif
 components:
   requestBodies:
     Pet:
@@ -505,6 +521,19 @@ components:
       allOf:
       - $ref: '#/components/schemas/DataQuery_allOf'
       - $ref: '#/components/schemas/Query'
+    NumberPropertiesOnly:
+      properties:
+        number:
+          type: number
+        float:
+          format: float
+          type: number
+        double:
+          format: double
+          maximum: 50.2
+          minimum: 0.8
+          type: number
+      type: object
     test_form_integer_boolean_string_request:
       properties:
         integer_form:

samples/client/echo_api/java/apache-httpclient/docs/BodyApi.md

@@ -4,11 +4,74 @@ All URIs are relative to *http://localhost:3000*
 
 | Method | HTTP request | Description |
 |------------- | ------------- | -------------|
+| [**testBinaryGif**](BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body |
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
 
 
 
+## testBinaryGif
+
+> File testBinaryGif()
+
+Test binary (gif) response body
+
+Test binary (gif) response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        try {
+            File result = apiInstance.testBinaryGif();
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testBinaryGif");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+This endpoint does not need any parameter.
+
+### Return type
+
+[**File**](File.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: image/gif
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+
 ## testEchoBodyPet
 
 > Pet testEchoBodyPet(pet)

samples/client/echo_api/java/apache-httpclient/docs/NumberPropertiesOnly.md

@@ -0,0 +1,15 @@
+
+
+# NumberPropertiesOnly
+
+
+## Properties
+
+| Name | Type | Description | Notes |
+|------------ | ------------- | ------------- | -------------|
+|**number** | **BigDecimal** |  |  [optional] |
+|**_float** | **Float** |  |  [optional] |
+|**_double** | **Double** |  |  [optional] |
+
+
+

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/ApiClient.java

@@ -20,6 +20,7 @@ import com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JavaType;
+import org.openapitools.jackson.nullable.JsonNullableModule;
 
 import org.apache.hc.client5.http.cookie.BasicCookieStore;
 import org.apache.hc.client5.http.cookie.Cookie;
@@ -116,6 +117,7 @@ public class ApiClient extends JavaTimeFormatter {
     objectMapper.enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING);
     objectMapper.enable(DeserializationFeature.READ_ENUMS_USING_TO_STRING);
     objectMapper.registerModule(new JavaTimeModule());
+    objectMapper.registerModule(new JsonNullableModule());
     objectMapper.setDateFormat(ApiClient.buildDefaultDateFormat());
 
     dateFormat = ApiClient.buildDefaultDateFormat();

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/BodyApi.java

@@ -20,10 +20,12 @@ import org.openapitools.client.Configuration;
 import org.openapitools.client.model.*;
 import org.openapitools.client.Pair;
 
+import java.io.File;
 import org.openapitools.client.model.Pet;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -31,6 +33,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BodyApi {
+
+
   private ApiClient apiClient;
 
   public BodyApi() {
@@ -49,6 +53,73 @@ public class BodyApi {
     this.apiClient = apiClient;
   }
 
+  /**
+   * Test binary (gif) response body
+   * Test binary (gif) response body
+   * @return File
+   * @throws ApiException if fails to make API call
+   */
+  public File testBinaryGif() throws ApiException {
+    return this.testBinaryGif(Collections.emptyMap());
+  }
+
+
+  /**
+   * Test binary (gif) response body
+   * Test binary (gif) response body
+   * @param additionalHeaders additionalHeaders for this call
+   * @return File
+   * @throws ApiException if fails to make API call
+   */
+  public File testBinaryGif(Map<String, String> additionalHeaders) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/binary/gif";
+
+    StringJoiner localVarQueryStringJoiner = new StringJoiner("&");
+    String localVarQueryParameterBaseName;
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+    
+    localVarHeaderParams.putAll(additionalHeaders);
+
+    
+    
+    final String[] localVarAccepts = {
+      "image/gif"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    TypeReference<File> localVarReturnType = new TypeReference<File>() {};
+    return apiClient.invokeAPI(
+        localVarPath,
+        "POST",
+        localVarQueryParams,
+        localVarCollectionQueryParams,
+        localVarQueryStringJoiner.toString(),
+        localVarPostBody,
+        localVarHeaderParams,
+        localVarCookieParams,
+        localVarFormParams,
+        localVarAccept,
+        localVarContentType,
+        localVarAuthNames,
+        localVarReturnType
+    );
+  }
+
   /**
    * Test body parameter(s)
    * Test body parameter(s)
@@ -57,6 +128,19 @@ public class BodyApi {
    * @throws ApiException if fails to make API call
    */
   public Pet testEchoBodyPet(Pet pet) throws ApiException {
+    return this.testEchoBodyPet(pet, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test body parameter(s)
+   * Test body parameter(s)
+   * @param pet Pet object that needs to be added to the store (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return Pet
+   * @throws ApiException if fails to make API call
+   */
+  public Pet testEchoBodyPet(Pet pet, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = pet;
     
     // create path and map variables
@@ -71,6 +155,8 @@ public class BodyApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -102,6 +188,7 @@ public class BodyApi {
         localVarReturnType
     );
   }
+
   /**
    * Test empty response body
    * Test empty response body
@@ -110,6 +197,19 @@ public class BodyApi {
    * @throws ApiException if fails to make API call
    */
   public String testEchoBodyPetResponseString(Pet pet) throws ApiException {
+    return this.testEchoBodyPetResponseString(pet, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test empty response body
+   * Test empty response body
+   * @param pet Pet object that needs to be added to the store (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testEchoBodyPetResponseString(Pet pet, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = pet;
     
     // create path and map variables
@@ -124,6 +224,8 @@ public class BodyApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -155,4 +257,5 @@ public class BodyApi {
         localVarReturnType
     );
   }
+
 }

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/FormApi.java

@@ -23,6 +23,7 @@ import org.openapitools.client.Pair;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -30,6 +31,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FormApi {
+
+
   private ApiClient apiClient;
 
   public FormApi() {
@@ -58,6 +61,21 @@ public class FormApi {
    * @throws ApiException if fails to make API call
    */
   public String testFormIntegerBooleanString(Integer integerForm, Boolean booleanForm, String stringForm) throws ApiException {
+    return this.testFormIntegerBooleanString(integerForm, booleanForm, stringForm, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test form parameter(s)
+   * Test form parameter(s)
+   * @param integerForm  (optional)
+   * @param booleanForm  (optional)
+   * @param stringForm  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testFormIntegerBooleanString(Integer integerForm, Boolean booleanForm, String stringForm, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -72,6 +90,8 @@ public class FormApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     if (integerForm != null)
       localVarFormParams.put("integer_form", integerForm);
@@ -109,4 +129,5 @@ if (stringForm != null)
         localVarReturnType
     );
   }
+
 }

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/HeaderApi.java

@@ -23,6 +23,7 @@ import org.openapitools.client.Pair;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -30,6 +31,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HeaderApi {
+
+
   private ApiClient apiClient;
 
   public HeaderApi() {
@@ -58,6 +61,21 @@ public class HeaderApi {
    * @throws ApiException if fails to make API call
    */
   public String testHeaderIntegerBooleanString(Integer integerHeader, Boolean booleanHeader, String stringHeader) throws ApiException {
+    return this.testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test header parameter(s)
+   * Test header parameter(s)
+   * @param integerHeader  (optional)
+   * @param booleanHeader  (optional)
+   * @param stringHeader  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testHeaderIntegerBooleanString(Integer integerHeader, Boolean booleanHeader, String stringHeader, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -78,6 +96,8 @@ if (booleanHeader != null)
 if (stringHeader != null)
       localVarHeaderParams.put("string_header", apiClient.parameterToString(stringHeader));
 
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -109,4 +129,5 @@ if (stringHeader != null)
         localVarReturnType
     );
   }
+
 }

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/PathApi.java

@@ -23,6 +23,7 @@ import org.openapitools.client.Pair;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -30,6 +31,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class PathApi {
+
+
   private ApiClient apiClient;
 
   public PathApi() {
@@ -57,6 +60,20 @@ public class PathApi {
    * @throws ApiException if fails to make API call
    */
   public String testsPathStringPathStringIntegerPathInteger(String pathString, Integer pathInteger) throws ApiException {
+    return this.testsPathStringPathStringIntegerPathInteger(pathString, pathInteger, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test path parameter(s)
+   * Test path parameter(s)
+   * @param pathString  (required)
+   * @param pathInteger  (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testsPathStringPathStringIntegerPathInteger(String pathString, Integer pathInteger, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'pathString' is set
@@ -83,6 +100,8 @@ public class PathApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -114,4 +133,5 @@ public class PathApi {
         localVarReturnType
     );
   }
+
 }

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/QueryApi.java

@@ -29,6 +29,7 @@ import org.openapitools.client.model.TestQueryStyleFormExplodeTrueArrayStringQue
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -36,6 +37,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class QueryApi {
+
+
   private ApiClient apiClient;
 
   public QueryApi() {
@@ -64,6 +67,21 @@ public class QueryApi {
    * @throws ApiException if fails to make API call
    */
   public String testQueryDatetimeDateString(OffsetDateTime datetimeQuery, LocalDate dateQuery, String stringQuery) throws ApiException {
+    return this.testQueryDatetimeDateString(datetimeQuery, dateQuery, stringQuery, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param datetimeQuery  (optional)
+   * @param dateQuery  (optional)
+   * @param stringQuery  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryDatetimeDateString(OffsetDateTime datetimeQuery, LocalDate dateQuery, String stringQuery, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -81,6 +99,8 @@ public class QueryApi {
     localVarQueryParams.addAll(apiClient.parameterToPair("date_query", dateQuery));
     localVarQueryParams.addAll(apiClient.parameterToPair("string_query", stringQuery));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -112,6 +132,7 @@ public class QueryApi {
         localVarReturnType
     );
   }
+
   /**
    * Test query parameter(s)
    * Test query parameter(s)
@@ -122,6 +143,21 @@ public class QueryApi {
    * @throws ApiException if fails to make API call
    */
   public String testQueryIntegerBooleanString(Integer integerQuery, Boolean booleanQuery, String stringQuery) throws ApiException {
+    return this.testQueryIntegerBooleanString(integerQuery, booleanQuery, stringQuery, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param integerQuery  (optional)
+   * @param booleanQuery  (optional)
+   * @param stringQuery  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryIntegerBooleanString(Integer integerQuery, Boolean booleanQuery, String stringQuery, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -139,6 +175,8 @@ public class QueryApi {
     localVarQueryParams.addAll(apiClient.parameterToPair("boolean_query", booleanQuery));
     localVarQueryParams.addAll(apiClient.parameterToPair("string_query", stringQuery));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -170,6 +208,7 @@ public class QueryApi {
         localVarReturnType
     );
   }
+
   /**
    * Test query parameter(s)
    * Test query parameter(s)
@@ -178,6 +217,19 @@ public class QueryApi {
    * @throws ApiException if fails to make API call
    */
   public String testQueryStyleDeepObjectExplodeTrueObject(Pet queryObject) throws ApiException {
+    return this.testQueryStyleDeepObjectExplodeTrueObject(queryObject, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param queryObject  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleDeepObjectExplodeTrueObject(Pet queryObject, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -194,6 +246,8 @@ public class QueryApi {
     localVarQueryParameterBaseName = "query_object";
     localVarQueryStringJoiner.add(queryObject.toUrlQueryString("query_object"));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -225,6 +279,7 @@ public class QueryApi {
         localVarReturnType
     );
   }
+
   /**
    * Test query parameter(s)
    * Test query parameter(s)
@@ -233,6 +288,19 @@ public class QueryApi {
    * @throws ApiException if fails to make API call
    */
   public String testQueryStyleDeepObjectExplodeTrueObjectAllOf(TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter queryObject) throws ApiException {
+    return this.testQueryStyleDeepObjectExplodeTrueObjectAllOf(queryObject, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param queryObject  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleDeepObjectExplodeTrueObjectAllOf(TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter queryObject, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -249,6 +317,8 @@ public class QueryApi {
     localVarQueryParameterBaseName = "query_object";
     localVarQueryStringJoiner.add(queryObject.toUrlQueryString("query_object"));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -280,6 +350,7 @@ public class QueryApi {
         localVarReturnType
     );
   }
+
   /**
    * Test query parameter(s)
    * Test query parameter(s)
@@ -288,6 +359,19 @@ public class QueryApi {
    * @throws ApiException if fails to make API call
    */
   public String testQueryStyleFormExplodeTrueArrayString(TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter queryObject) throws ApiException {
+    return this.testQueryStyleFormExplodeTrueArrayString(queryObject, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param queryObject  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleFormExplodeTrueArrayString(TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter queryObject, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -303,6 +387,8 @@ public class QueryApi {
 
     localVarQueryParams.addAll(apiClient.parameterToPairs("multi", "values", queryObject.getValues()));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -334,6 +420,7 @@ public class QueryApi {
         localVarReturnType
     );
   }
+
   /**
    * Test query parameter(s)
    * Test query parameter(s)
@@ -342,6 +429,19 @@ public class QueryApi {
    * @throws ApiException if fails to make API call
    */
   public String testQueryStyleFormExplodeTrueObject(Pet queryObject) throws ApiException {
+    return this.testQueryStyleFormExplodeTrueObject(queryObject, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param queryObject  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleFormExplodeTrueObject(Pet queryObject, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -362,6 +462,8 @@ public class QueryApi {
     localVarQueryParams.addAll(apiClient.parameterToPairs("multi", "tags", queryObject.getTags()));
     localVarQueryParams.addAll(apiClient.parameterToPair("status", queryObject.getStatus()));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -393,6 +495,7 @@ public class QueryApi {
         localVarReturnType
     );
   }
+
   /**
    * Test query parameter(s)
    * Test query parameter(s)
@@ -401,6 +504,19 @@ public class QueryApi {
    * @throws ApiException if fails to make API call
    */
   public String testQueryStyleFormExplodeTrueObjectAllOf(DataQuery queryObject) throws ApiException {
+    return this.testQueryStyleFormExplodeTrueObjectAllOf(queryObject, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param queryObject  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleFormExplodeTrueObjectAllOf(DataQuery queryObject, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -416,6 +532,8 @@ public class QueryApi {
 
     localVarQueryStringJoiner.add(queryObject.toUrlQueryString());
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -447,4 +565,5 @@ public class QueryApi {
         localVarReturnType
     );
   }
+
 }

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/Bird.java

@@ -95,7 +95,6 @@ public class Bird {
     this.color = color;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/Category.java

@@ -95,7 +95,6 @@ public class Category {
     this.name = name;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/DataQuery.java

@@ -130,6 +130,17 @@ public class DataQuery extends Query {
     this.date = date;
   }
 
+  @Override
+  public DataQuery id(Long id) {
+    this.setId(id);
+    return this;
+  }
+
+  @Override
+  public DataQuery outcomes(List<OutcomesEnum> outcomes) {
+    this.setOutcomes(outcomes);
+    return this;
+  }
 
   @Override
   public boolean equals(Object o) {

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/DataQueryAllOf.java

@@ -127,7 +127,6 @@ public class DataQueryAllOf {
     this.date = date;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/DefaultValue.java

@@ -98,7 +98,7 @@ public class DefaultValue {
   private List<Integer> arrayIntegerDefault = new ArrayList<>(Arrays.asList(1, 3));
 
   public static final String JSON_PROPERTY_ARRAY_STRING = "array_string";
-  private List<String> arrayString = new ArrayList<>();
+  private List<String> arrayString;
 
   public static final String JSON_PROPERTY_ARRAY_STRING_NULLABLE = "array_string_nullable";
   private JsonNullable<List<String>> arrayStringNullable = JsonNullable.<List<String>>undefined();
@@ -407,7 +407,6 @@ public class DefaultValue {
     this.stringNullable = JsonNullable.<String>of(stringNullable);
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/NumberPropertiesOnly.java

@@ -0,0 +1,238 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import java.math.BigDecimal;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+import java.util.StringJoiner;
+
+/**
+ * NumberPropertiesOnly
+ */
+@JsonPropertyOrder({
+  NumberPropertiesOnly.JSON_PROPERTY_NUMBER,
+  NumberPropertiesOnly.JSON_PROPERTY_FLOAT,
+  NumberPropertiesOnly.JSON_PROPERTY_DOUBLE
+})
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class NumberPropertiesOnly {
+  public static final String JSON_PROPERTY_NUMBER = "number";
+  private BigDecimal number;
+
+  public static final String JSON_PROPERTY_FLOAT = "float";
+  private Float _float;
+
+  public static final String JSON_PROPERTY_DOUBLE = "double";
+  private Double _double;
+
+  public NumberPropertiesOnly() {
+  }
+
+  public NumberPropertiesOnly number(BigDecimal number) {
+    
+    this.number = number;
+    return this;
+  }
+
+   /**
+   * Get number
+   * @return number
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public BigDecimal getNumber() {
+    return number;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setNumber(BigDecimal number) {
+    this.number = number;
+  }
+
+
+  public NumberPropertiesOnly _float(Float _float) {
+    
+    this._float = _float;
+    return this;
+  }
+
+   /**
+   * Get _float
+   * @return _float
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_FLOAT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Float getFloat() {
+    return _float;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_FLOAT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setFloat(Float _float) {
+    this._float = _float;
+  }
+
+
+  public NumberPropertiesOnly _double(Double _double) {
+    
+    this._double = _double;
+    return this;
+  }
+
+   /**
+   * Get _double
+   * minimum: 0.8
+   * maximum: 50.2
+   * @return _double
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_DOUBLE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Double getDouble() {
+    return _double;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DOUBLE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setDouble(Double _double) {
+    this._double = _double;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    NumberPropertiesOnly numberPropertiesOnly = (NumberPropertiesOnly) o;
+    return Objects.equals(this.number, numberPropertiesOnly.number) &&
+        Objects.equals(this._float, numberPropertiesOnly._float) &&
+        Objects.equals(this._double, numberPropertiesOnly._double);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(number, _float, _double);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class NumberPropertiesOnly {\n");
+    sb.append("    number: ").append(toIndentedString(number)).append("\n");
+    sb.append("    _float: ").append(toIndentedString(_float)).append("\n");
+    sb.append("    _double: ").append(toIndentedString(_double)).append("\n");
+    sb.append("}");
+    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    ");
+  }
+
+  /**
+   * Convert the instance into URL query string.
+   *
+   * @return URL query string
+   */
+  public String toUrlQueryString() {
+    return toUrlQueryString(null);
+  }
+
+  /**
+   * Convert the instance into URL query string.
+   *
+   * @param prefix prefix of the query string
+   * @return URL query string
+   */
+  public String toUrlQueryString(String prefix) {
+    String suffix = "";
+    String containerSuffix = "";
+    String containerPrefix = "";
+    if (prefix == null) {
+      // style=form, explode=true, e.g. /pet?name=cat&type=manx
+      prefix = "";
+    } else {
+      // deepObject style e.g. /pet?id[name]=cat&id[type]=manx
+      prefix = prefix + "[";
+      suffix = "]";
+      containerSuffix = "]";
+      containerPrefix = "[";
+    }
+
+    StringJoiner joiner = new StringJoiner("&");
+
+    // add `number` to the URL query string
+    if (getNumber() != null) {
+      try {
+        joiner.add(String.format("%snumber%s=%s", prefix, suffix, URLEncoder.encode(String.valueOf(getNumber()), "UTF-8").replaceAll("\\+", "%20")));
+      } catch (UnsupportedEncodingException e) {
+        // Should never happen, UTF-8 is always supported
+        throw new RuntimeException(e);
+      }
+    }
+
+    // add `float` to the URL query string
+    if (getFloat() != null) {
+      try {
+        joiner.add(String.format("%sfloat%s=%s", prefix, suffix, URLEncoder.encode(String.valueOf(getFloat()), "UTF-8").replaceAll("\\+", "%20")));
+      } catch (UnsupportedEncodingException e) {
+        // Should never happen, UTF-8 is always supported
+        throw new RuntimeException(e);
+      }
+    }
+
+    // add `double` to the URL query string
+    if (getDouble() != null) {
+      try {
+        joiner.add(String.format("%sdouble%s=%s", prefix, suffix, URLEncoder.encode(String.valueOf(getDouble()), "UTF-8").replaceAll("\\+", "%20")));
+      } catch (UnsupportedEncodingException e) {
+        // Should never happen, UTF-8 is always supported
+        throw new RuntimeException(e);
+      }
+    }
+
+    return joiner.toString();
+  }
+
+}
+

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/Pet.java

@@ -56,7 +56,7 @@ public class Pet {
   private List<String> photoUrls = new ArrayList<>();
 
   public static final String JSON_PROPERTY_TAGS = "tags";
-  private List<Tag> tags = new ArrayList<>();
+  private List<Tag> tags;
 
   /**
    * pet status in the store
@@ -186,6 +186,9 @@ public class Pet {
   }
 
   public Pet addPhotoUrlsItem(String photoUrlsItem) {
+    if (this.photoUrls == null) {
+      this.photoUrls = new ArrayList<>();
+    }
     this.photoUrls.add(photoUrlsItem);
     return this;
   }
@@ -269,7 +272,6 @@ public class Pet {
     this.status = status;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/Query.java

@@ -142,7 +142,6 @@ public class Query {
     this.outcomes = outcomes;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/Tag.java

@@ -95,7 +95,6 @@ public class Tag {
     this.name = name;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.java

@@ -156,7 +156,6 @@ public class TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter
     this.name = name;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/model/TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter.java

@@ -38,7 +38,7 @@ import java.util.StringJoiner;
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter {
   public static final String JSON_PROPERTY_VALUES = "values";
-  private List<String> values = new ArrayList<>();
+  private List<String> values;
 
   public TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter() {
   }
@@ -76,7 +76,6 @@ public class TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter {
     this.values = values;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/apache-httpclient/src/test/java/org/openapitools/client/CustomTest.java

@@ -175,7 +175,7 @@ public class CustomTest {
         Assert.assertEquals(d.getArrayIntegerDefault().get(1), Integer.valueOf(3));
 
         Assert.assertNull(d.getArrayStringNullable());
-        Assert.assertEquals(d.getArrayString().size(), 0);
+        Assert.assertNull(d.getArrayString());
 
         // test addItem
         d.addArrayStringEnumDefaultItem(DefaultValue.ArrayStringEnumDefaultEnum.UNCLASSIFIED);
@@ -218,9 +218,9 @@ public class CustomTest {
         Assert.assertEquals(d.getArrayIntegerDefault().get(1), Integer.valueOf(3));
 
         Assert.assertNull(d.getArrayStringNullable());
-        Assert.assertEquals(d.getArrayString().size(), 0);
+        Assert.assertNull(d.getArrayString());
 
-        Assert.assertEquals(apiClient.getObjectMapper().writeValueAsString(d), "{\"array_string_enum_ref_default\":[\"success\",\"failure\"],\"array_string_enum_default\":[\"success\",\"failure\"],\"array_string_default\":[\"failure\",\"skipped\"],\"array_integer_default\":[1,3],\"array_string\":[],\"array_string_nullable\":{\"present\":false},\"array_string_extension_nullable\":{\"present\":false},\"string_nullable\":{\"present\":false}}");
+        Assert.assertEquals(apiClient.getObjectMapper().writeValueAsString(d), "{\"array_string_enum_ref_default\":[\"success\",\"failure\"],\"array_string_enum_default\":[\"success\",\"failure\"],\"array_string_default\":[\"failure\",\"skipped\"],\"array_integer_default\":[1,3]}");
     }
 
     @Test
@@ -246,9 +246,9 @@ public class CustomTest {
         Assert.assertEquals(d.getArrayIntegerDefault().get(1), Integer.valueOf(3));
 
         Assert.assertNull(d.getArrayStringNullable());
-        Assert.assertEquals(d.getArrayString().size(), 0);
+        Assert.assertNull(d.getArrayString());
 
-        Assert.assertEquals(apiClient.getObjectMapper().writeValueAsString(d), "{\"array_string_enum_ref_default\":[\"unclassified\"],\"array_string_enum_default\":[\"unclassified\"],\"array_string_default\":[\"failure\"],\"array_integer_default\":[1,3],\"array_string\":[],\"array_string_nullable\":{\"present\":false},\"array_string_extension_nullable\":{\"present\":false},\"string_nullable\":{\"present\":false}}");
+        Assert.assertEquals(apiClient.getObjectMapper().writeValueAsString(d), "{\"array_string_enum_ref_default\":[\"unclassified\"],\"array_string_enum_default\":[\"unclassified\"],\"array_string_default\":[\"failure\"],\"array_integer_default\":[1,3]}");
     }
 
     @Test

samples/client/echo_api/java/apache-httpclient/src/test/java/org/openapitools/client/model/NumberPropertiesOnlyTest.java

@@ -0,0 +1,65 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * 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 org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for NumberPropertiesOnly
+ */
+public class NumberPropertiesOnlyTest {
+    private final NumberPropertiesOnly model = new NumberPropertiesOnly();
+
+    /**
+     * Model tests for NumberPropertiesOnly
+     */
+    @Test
+    public void testNumberPropertiesOnly() {
+        // TODO: test NumberPropertiesOnly
+    }
+
+    /**
+     * Test the property 'number'
+     */
+    @Test
+    public void numberTest() {
+        // TODO: test number
+    }
+
+    /**
+     * Test the property '_float'
+     */
+    @Test
+    public void _floatTest() {
+        // TODO: test _float
+    }
+
+    /**
+     * Test the property '_double'
+     */
+    @Test
+    public void _doubleTest() {
+        // TODO: test _double
+    }
+
+}

samples/client/echo_api/java/feign-gson/.openapi-generator/FILES

@@ -33,6 +33,7 @@ src/main/java/org/openapitools/client/model/Category.java
 src/main/java/org/openapitools/client/model/DataQuery.java
 src/main/java/org/openapitools/client/model/DataQueryAllOf.java
 src/main/java/org/openapitools/client/model/DefaultValue.java
+src/main/java/org/openapitools/client/model/NumberPropertiesOnly.java
 src/main/java/org/openapitools/client/model/Pet.java
 src/main/java/org/openapitools/client/model/Query.java
 src/main/java/org/openapitools/client/model/StringEnumRef.java

samples/client/echo_api/java/feign-gson/api/openapi.yaml

@@ -326,6 +326,22 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /binary/gif:
+    post:
+      description: Test binary (gif) response body
+      operationId: test/binary/gif
+      responses:
+        "200":
+          content:
+            image/gif:
+              schema:
+                format: binary
+                type: string
+          description: Successful operation
+      summary: Test binary (gif) response body
+      tags:
+      - body
+      x-accepts: image/gif
 components:
   requestBodies:
     Pet:
@@ -505,6 +521,19 @@ components:
       allOf:
       - $ref: '#/components/schemas/DataQuery_allOf'
       - $ref: '#/components/schemas/Query'
+    NumberPropertiesOnly:
+      properties:
+        number:
+          type: number
+        float:
+          format: float
+          type: number
+        double:
+          format: double
+          maximum: 50.2
+          minimum: 0.8
+          type: number
+      type: object
     test_form_integer_boolean_string_request:
       properties:
         integer_form:

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/api/BodyApi.java

@@ -4,6 +4,7 @@ import org.openapitools.client.ApiClient;
 import org.openapitools.client.EncodingUtils;
 import org.openapitools.client.model.ApiResponse;
 
+import java.io.File;
 import org.openapitools.client.model.Pet;
 
 import java.util.ArrayList;
@@ -16,6 +17,31 @@ import feign.*;
 public interface BodyApi extends ApiClient.Api {
 
 
+  /**
+   * Test binary (gif) response body
+   * Test binary (gif) response body
+   * @return File
+   */
+  @RequestLine("POST /binary/gif")
+  @Headers({
+    "Accept: image/gif",
+  })
+  File testBinaryGif();
+
+  /**
+   * Test binary (gif) response body
+   * Similar to <code>testBinaryGif</code> but it also returns the http response headers .
+   * Test binary (gif) response body
+   * @return A ApiResponse that wraps the response boyd and the http headers.
+   */
+  @RequestLine("POST /binary/gif")
+  @Headers({
+    "Accept: image/gif",
+  })
+  ApiResponse<File> testBinaryGifWithHttpInfo();
+
+
+
   /**
    * Test body parameter(s)
    * Test body parameter(s)

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/Bird.java

@@ -81,7 +81,6 @@ public class Bird {
     this.color = color;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/Category.java

@@ -81,7 +81,6 @@ public class Category {
     this.name = name;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/DataQuery.java

@@ -112,6 +112,17 @@ public class DataQuery extends Query {
     this.date = date;
   }
 
+  @Override
+  public DataQuery id(Long id) {
+    this.setId(id);
+    return this;
+  }
+
+  @Override
+  public DataQuery outcomes(List<OutcomesEnum> outcomes) {
+    this.setOutcomes(outcomes);
+    return this;
+  }
 
   @Override
   public boolean equals(Object o) {

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/DataQueryAllOf.java

@@ -108,7 +108,6 @@ public class DataQueryAllOf {
     this.date = date;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/DefaultValue.java

@@ -98,7 +98,7 @@ public class DefaultValue {
 
   public static final String SERIALIZED_NAME_ARRAY_STRING = "array_string";
   @SerializedName(SERIALIZED_NAME_ARRAY_STRING)
-  private List<String> arrayString = new ArrayList<>();
+  private List<String> arrayString;
 
   public static final String SERIALIZED_NAME_ARRAY_STRING_NULLABLE = "array_string_nullable";
   @SerializedName(SERIALIZED_NAME_ARRAY_STRING_NULLABLE)
@@ -272,6 +272,9 @@ public class DefaultValue {
   }
 
   public DefaultValue addArrayStringNullableItem(String arrayStringNullableItem) {
+    if (this.arrayStringNullable == null) {
+      this.arrayStringNullable = new ArrayList<>();
+    }
     this.arrayStringNullable.add(arrayStringNullableItem);
     return this;
   }
@@ -299,6 +302,9 @@ public class DefaultValue {
   }
 
   public DefaultValue addArrayStringExtensionNullableItem(String arrayStringExtensionNullableItem) {
+    if (this.arrayStringExtensionNullable == null) {
+      this.arrayStringExtensionNullable = new ArrayList<>();
+    }
     this.arrayStringExtensionNullable.add(arrayStringExtensionNullableItem);
     return this;
   }
@@ -340,7 +346,6 @@ public class DefaultValue {
     this.stringNullable = stringNullable;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/NumberPropertiesOnly.java

@@ -0,0 +1,155 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import java.io.IOException;
+import java.math.BigDecimal;
+
+/**
+ * NumberPropertiesOnly
+ */
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class NumberPropertiesOnly {
+  public static final String SERIALIZED_NAME_NUMBER = "number";
+  @SerializedName(SERIALIZED_NAME_NUMBER)
+  private BigDecimal number;
+
+  public static final String SERIALIZED_NAME_FLOAT = "float";
+  @SerializedName(SERIALIZED_NAME_FLOAT)
+  private Float _float;
+
+  public static final String SERIALIZED_NAME_DOUBLE = "double";
+  @SerializedName(SERIALIZED_NAME_DOUBLE)
+  private Double _double;
+
+  public NumberPropertiesOnly() {
+  }
+
+  public NumberPropertiesOnly number(BigDecimal number) {
+    
+    this.number = number;
+    return this;
+  }
+
+   /**
+   * Get number
+   * @return number
+  **/
+  @javax.annotation.Nullable
+
+  public BigDecimal getNumber() {
+    return number;
+  }
+
+
+  public void setNumber(BigDecimal number) {
+    this.number = number;
+  }
+
+
+  public NumberPropertiesOnly _float(Float _float) {
+    
+    this._float = _float;
+    return this;
+  }
+
+   /**
+   * Get _float
+   * @return _float
+  **/
+  @javax.annotation.Nullable
+
+  public Float getFloat() {
+    return _float;
+  }
+
+
+  public void setFloat(Float _float) {
+    this._float = _float;
+  }
+
+
+  public NumberPropertiesOnly _double(Double _double) {
+    
+    this._double = _double;
+    return this;
+  }
+
+   /**
+   * Get _double
+   * minimum: 0.8
+   * maximum: 50.2
+   * @return _double
+  **/
+  @javax.annotation.Nullable
+
+  public Double getDouble() {
+    return _double;
+  }
+
+
+  public void setDouble(Double _double) {
+    this._double = _double;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    NumberPropertiesOnly numberPropertiesOnly = (NumberPropertiesOnly) o;
+    return Objects.equals(this.number, numberPropertiesOnly.number) &&
+        Objects.equals(this._float, numberPropertiesOnly._float) &&
+        Objects.equals(this._double, numberPropertiesOnly._double);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(number, _float, _double);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class NumberPropertiesOnly {\n");
+    sb.append("    number: ").append(toIndentedString(number)).append("\n");
+    sb.append("    _float: ").append(toIndentedString(_float)).append("\n");
+    sb.append("    _double: ").append(toIndentedString(_double)).append("\n");
+    sb.append("}");
+    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/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/Pet.java

@@ -49,7 +49,7 @@ public class Pet {
 
   public static final String SERIALIZED_NAME_TAGS = "tags";
   @SerializedName(SERIALIZED_NAME_TAGS)
-  private List<Tag> tags = new ArrayList<>();
+  private List<Tag> tags;
 
   /**
    * pet status in the store
@@ -180,6 +180,9 @@ public class Pet {
   }
 
   public Pet addPhotoUrlsItem(String photoUrlsItem) {
+    if (this.photoUrls == null) {
+      this.photoUrls = new ArrayList<>();
+    }
     this.photoUrls.add(photoUrlsItem);
     return this;
   }
@@ -251,7 +254,6 @@ public class Pet {
     this.status = status;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/Query.java

@@ -140,7 +140,6 @@ public class Query {
     this.outcomes = outcomes;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/Tag.java

@@ -81,7 +81,6 @@ public class Tag {
     this.name = name;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.java

@@ -133,7 +133,6 @@ public class TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter
     this.name = name;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/model/TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter.java

@@ -31,7 +31,7 @@ import java.util.List;
 public class TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter {
   public static final String SERIALIZED_NAME_VALUES = "values";
   @SerializedName(SERIALIZED_NAME_VALUES)
-  private List<String> values = new ArrayList<>();
+  private List<String> values;
 
   public TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter() {
   }
@@ -65,7 +65,6 @@ public class TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter {
     this.values = values;
   }
 
-
   @Override
   public boolean equals(Object o) {
     if (this == o) {

samples/client/echo_api/java/feign-gson/src/test/java/org/openapitools/client/model/NumberPropertiesOnlyTest.java

@@ -0,0 +1,64 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * 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.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import java.io.IOException;
+import java.math.BigDecimal;
+import org.junit.jupiter.api.Test;
+
+
+/**
+ * Model tests for NumberPropertiesOnly
+ */
+class NumberPropertiesOnlyTest {
+    private final NumberPropertiesOnly model = new NumberPropertiesOnly();
+
+    /**
+     * Model tests for NumberPropertiesOnly
+     */
+    @Test
+    void testNumberPropertiesOnly() {
+        // TODO: test NumberPropertiesOnly
+    }
+
+    /**
+     * Test the property 'number'
+     */
+    @Test
+    void numberTest() {
+        // TODO: test number
+    }
+
+    /**
+     * Test the property '_float'
+     */
+    @Test
+    void _floatTest() {
+        // TODO: test _float
+    }
+
+    /**
+     * Test the property '_double'
+     */
+    @Test
+    void _doubleTest() {
+        // TODO: test _double
+    }
+
+}

samples/client/echo_api/java/native/.openapi-generator/FILES

@@ -13,6 +13,7 @@ docs/DataQueryAllOf.md
 docs/DefaultValue.md
 docs/FormApi.md
 docs/HeaderApi.md
+docs/NumberPropertiesOnly.md
 docs/PathApi.md
 docs/Pet.md
 docs/Query.md
@@ -50,6 +51,7 @@ src/main/java/org/openapitools/client/model/Category.java
 src/main/java/org/openapitools/client/model/DataQuery.java
 src/main/java/org/openapitools/client/model/DataQueryAllOf.java
 src/main/java/org/openapitools/client/model/DefaultValue.java
+src/main/java/org/openapitools/client/model/NumberPropertiesOnly.java
 src/main/java/org/openapitools/client/model/Pet.java
 src/main/java/org/openapitools/client/model/Query.java
 src/main/java/org/openapitools/client/model/StringEnumRef.java

samples/client/echo_api/java/native/README.md

@@ -83,12 +83,11 @@ public class BodyApiExample {
         // Configure clients using the `defaultClient` object, such as
         // overriding the host and port, timeout, etc.
         BodyApi apiInstance = new BodyApi(defaultClient);
-        Pet pet = new Pet(); // Pet | Pet object that needs to be added to the store
         try {
-            Pet result = apiInstance.testEchoBodyPet(pet);
+            File result = apiInstance.testBinaryGif();
             System.out.println(result);
         } catch (ApiException e) {
-            System.err.println("Exception when calling BodyApi#testEchoBodyPet");
+            System.err.println("Exception when calling BodyApi#testBinaryGif");
             System.err.println("Status code: " + e.getCode());
             System.err.println("Reason: " + e.getResponseBody());
             System.err.println("Response headers: " + e.getResponseHeaders());
@@ -105,6 +104,8 @@ All URIs are relative to *http://localhost:3000*
 
 Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
+*BodyApi* | [**testBinaryGif**](docs/BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body
+*BodyApi* | [**testBinaryGifWithHttpInfo**](docs/BodyApi.md#testBinaryGifWithHttpInfo) | **POST** /binary/gif | Test binary (gif) response body
 *BodyApi* | [**testEchoBodyPet**](docs/BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetWithHttpInfo**](docs/BodyApi.md#testEchoBodyPetWithHttpInfo) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
@@ -138,6 +139,7 @@ Class | Method | HTTP request | Description
  - [DataQuery](docs/DataQuery.md)
  - [DataQueryAllOf](docs/DataQueryAllOf.md)
  - [DefaultValue](docs/DefaultValue.md)
+ - [NumberPropertiesOnly](docs/NumberPropertiesOnly.md)
  - [Pet](docs/Pet.md)
  - [Query](docs/Query.md)
  - [StringEnumRef](docs/StringEnumRef.md)

samples/client/echo_api/java/native/api/openapi.yaml

@@ -326,6 +326,22 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /binary/gif:
+    post:
+      description: Test binary (gif) response body
+      operationId: test/binary/gif
+      responses:
+        "200":
+          content:
+            image/gif:
+              schema:
+                format: binary
+                type: string
+          description: Successful operation
+      summary: Test binary (gif) response body
+      tags:
+      - body
+      x-accepts: image/gif
 components:
   requestBodies:
     Pet:
@@ -505,6 +521,19 @@ components:
       allOf:
       - $ref: '#/components/schemas/DataQuery_allOf'
       - $ref: '#/components/schemas/Query'
+    NumberPropertiesOnly:
+      properties:
+        number:
+          type: number
+        float:
+          format: float
+          type: number
+        double:
+          format: double
+          maximum: 50.2
+          minimum: 0.8
+          type: number
+      type: object
     test_form_integer_boolean_string_request:
       properties:
         integer_form:

samples/client/echo_api/java/native/docs/BodyApi.md

@@ -4,6 +4,8 @@ All URIs are relative to *http://localhost:3000*
 
 | Method | HTTP request | Description |
 |------------- | ------------- | -------------|
+| [**testBinaryGif**](BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body |
+| [**testBinaryGifWithHttpInfo**](BodyApi.md#testBinaryGifWithHttpInfo) | **POST** /binary/gif | Test binary (gif) response body |
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetWithHttpInfo**](BodyApi.md#testEchoBodyPetWithHttpInfo) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
@@ -11,6 +13,132 @@ All URIs are relative to *http://localhost:3000*
 
 
 
+## testBinaryGif
+
+> File testBinaryGif()
+
+Test binary (gif) response body
+
+Test binary (gif) response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        try {
+            File result = apiInstance.testBinaryGif();
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testBinaryGif");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+This endpoint does not need any parameter.
+
+### Return type
+
+[**File**](File.md)
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: image/gif
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+## testBinaryGifWithHttpInfo
+
+> ApiResponse<File> testBinaryGif testBinaryGifWithHttpInfo()
+
+Test binary (gif) response body
+
+Test binary (gif) response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        try {
+            ApiResponse<File> response = apiInstance.testBinaryGifWithHttpInfo();
+            System.out.println("Status code: " + response.getStatusCode());
+            System.out.println("Response headers: " + response.getHeaders());
+            System.out.println("Response body: " + response.getData());
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testBinaryGif");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            System.err.println("Reason: " + e.getResponseBody());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+This endpoint does not need any parameter.
+
+### Return type
+
+ApiResponse<[**File**](File.md)>
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: image/gif
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+
 ## testEchoBodyPet
 
 > Pet testEchoBodyPet(pet)

samples/client/echo_api/java/native/docs/NumberPropertiesOnly.md

@@ -0,0 +1,15 @@
+
+
+# NumberPropertiesOnly
+
+
+## Properties
+
+| Name | Type | Description | Notes |
+|------------ | ------------- | ------------- | -------------|
+|**number** | **BigDecimal** |  |  [optional] |
+|**_float** | **Float** |  |  [optional] |
+|**_double** | **Double** |  |  [optional] |
+
+
+

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/BodyApi.java

@@ -17,6 +17,7 @@ import org.openapitools.client.ApiException;
 import org.openapitools.client.ApiResponse;
 import org.openapitools.client.Pair;
 
+import java.io.File;
 import org.openapitools.client.model.Pet;
 
 import com.fasterxml.jackson.core.type.TypeReference;
@@ -81,6 +82,71 @@ public class BodyApi {
     return operationId + " call failed with: " + statusCode + " - " + body;
   }
 
+  /**
+   * Test binary (gif) response body
+   * Test binary (gif) response body
+   * @return File
+   * @throws ApiException if fails to make API call
+   */
+  public File testBinaryGif() throws ApiException {
+    ApiResponse<File> localVarResponse = testBinaryGifWithHttpInfo();
+    return localVarResponse.getData();
+  }
+
+  /**
+   * Test binary (gif) response body
+   * Test binary (gif) response body
+   * @return ApiResponse&lt;File&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<File> testBinaryGifWithHttpInfo() throws ApiException {
+    HttpRequest.Builder localVarRequestBuilder = testBinaryGifRequestBuilder();
+    try {
+      HttpResponse<InputStream> localVarResponse = memberVarHttpClient.send(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofInputStream());
+      if (memberVarResponseInterceptor != null) {
+        memberVarResponseInterceptor.accept(localVarResponse);
+      }
+      try {
+        if (localVarResponse.statusCode()/ 100 != 2) {
+          throw getApiException("testBinaryGif", localVarResponse);
+        }
+        return new ApiResponse<File>(
+          localVarResponse.statusCode(),
+          localVarResponse.headers().map(),
+          localVarResponse.body() == null ? null : memberVarObjectMapper.readValue(localVarResponse.body(), new TypeReference<File>() {}) // closes the InputStream
+        );
+      } finally {
+      }
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      throw new ApiException(e);
+    }
+  }
+
+  private HttpRequest.Builder testBinaryGifRequestBuilder() throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/binary/gif";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    localVarRequestBuilder.header("Accept", "image/gif");
+
+    localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.noBody());
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
   /**
    * Test body parameter(s)
    * Test body parameter(s)

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/FormApi.java

@@ -157,9 +157,15 @@ public class FormApi {
     localVarRequestBuilder.header("Accept", "text/plain");
 
     List<NameValuePair> formValues = new ArrayList<>();
-    formValues.add(new BasicNameValuePair("integer_form", integerForm.toString()));
-    formValues.add(new BasicNameValuePair("boolean_form", booleanForm.toString()));
-    formValues.add(new BasicNameValuePair("string_form", stringForm.toString()));
+    if (integerForm != null) {
+        formValues.add(new BasicNameValuePair("integer_form", integerForm.toString()));
+    }
+    if (booleanForm != null) {
+        formValues.add(new BasicNameValuePair("boolean_form", booleanForm.toString()));
+    }
+    if (stringForm != null) {
+        formValues.add(new BasicNameValuePair("string_form", stringForm.toString()));
+    }
     HttpEntity entity = new UrlEncodedFormEntity(formValues, java.nio.charset.StandardCharsets.UTF_8);
     ByteArrayOutputStream formOutputStream = new ByteArrayOutputStream();
     try {

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/model/DataQuery.java

@@ -129,6 +129,18 @@ public class DataQuery extends Query {
   }
 
 
+  @Override
+  public DataQuery id(Long id) {
+    this.setId(id);
+    return this;
+  }
+
+  @Override
+  public DataQuery outcomes(List<OutcomesEnum> outcomes) {
+    this.setOutcomes(outcomes);
+    return this;
+  }
+
   /**
    * Return true if this DataQuery object is equal to o.
    */

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/model/DefaultValue.java

@@ -100,7 +100,7 @@ public class DefaultValue {
   private List<Integer> arrayIntegerDefault = new ArrayList<>(Arrays.asList(1, 3));
 
   public static final String JSON_PROPERTY_ARRAY_STRING = "array_string";
-  private List<String> arrayString = new ArrayList<>();
+  private List<String> arrayString;
 
   public static final String JSON_PROPERTY_ARRAY_STRING_NULLABLE = "array_string_nullable";
   private JsonNullable<List<String>> arrayStringNullable = JsonNullable.<List<String>>undefined();
@@ -121,7 +121,7 @@ public class DefaultValue {
 
   public DefaultValue addArrayStringEnumRefDefaultItem(StringEnumRef arrayStringEnumRefDefaultItem) {
     if (this.arrayStringEnumRefDefault == null) {
-      this.arrayStringEnumRefDefault = new ArrayList<>();
+      this.arrayStringEnumRefDefault = new ArrayList<>(Arrays.asList(StringEnumRef.SUCCESS, StringEnumRef.FAILURE));
     }
     this.arrayStringEnumRefDefault.add(arrayStringEnumRefDefaultItem);
     return this;
@@ -154,7 +154,7 @@ public class DefaultValue {
 
   public DefaultValue addArrayStringEnumDefaultItem(ArrayStringEnumDefaultEnum arrayStringEnumDefaultItem) {
     if (this.arrayStringEnumDefault == null) {
-      this.arrayStringEnumDefault = new ArrayList<>();
+      this.arrayStringEnumDefault = new ArrayList<>(Arrays.asList(ArrayStringEnumDefaultEnum.SUCCESS, ArrayStringEnumDefaultEnum.FAILURE));
     }
     this.arrayStringEnumDefault.add(arrayStringEnumDefaultItem);
     return this;
@@ -187,7 +187,7 @@ public class DefaultValue {
 
   public DefaultValue addArrayStringDefaultItem(String arrayStringDefaultItem) {
     if (this.arrayStringDefault == null) {
-      this.arrayStringDefault = new ArrayList<>();
+      this.arrayStringDefault = new ArrayList<>(Arrays.asList("failure", "skipped"));
     }
     this.arrayStringDefault.add(arrayStringDefaultItem);
     return this;
@@ -220,7 +220,7 @@ public class DefaultValue {
 
   public DefaultValue addArrayIntegerDefaultItem(Integer arrayIntegerDefaultItem) {
     if (this.arrayIntegerDefault == null) {
-      this.arrayIntegerDefault = new ArrayList<>();
+      this.arrayIntegerDefault = new ArrayList<>(Arrays.asList(1, 3));
     }
     this.arrayIntegerDefault.add(arrayIntegerDefaultItem);
     return this;

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/model/NumberPropertiesOnly.java

@@ -0,0 +1,225 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * 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.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.StringJoiner;
+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 com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+
+/**
+ * NumberPropertiesOnly
+ */
+@JsonPropertyOrder({
+  NumberPropertiesOnly.JSON_PROPERTY_NUMBER,
+  NumberPropertiesOnly.JSON_PROPERTY_FLOAT,
+  NumberPropertiesOnly.JSON_PROPERTY_DOUBLE
+})
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class NumberPropertiesOnly {
+  public static final String JSON_PROPERTY_NUMBER = "number";
+  private BigDecimal number;
+
+  public static final String JSON_PROPERTY_FLOAT = "float";
+  private Float _float;
+
+  public static final String JSON_PROPERTY_DOUBLE = "double";
+  private Double _double;
+
+  public NumberPropertiesOnly() { 
+  }
+
+  public NumberPropertiesOnly number(BigDecimal number) {
+    this.number = number;
+    return this;
+  }
+
+   /**
+   * Get number
+   * @return number
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public BigDecimal getNumber() {
+    return number;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setNumber(BigDecimal number) {
+    this.number = number;
+  }
+
+
+  public NumberPropertiesOnly _float(Float _float) {
+    this._float = _float;
+    return this;
+  }
+
+   /**
+   * Get _float
+   * @return _float
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_FLOAT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Float getFloat() {
+    return _float;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_FLOAT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setFloat(Float _float) {
+    this._float = _float;
+  }
+
+
+  public NumberPropertiesOnly _double(Double _double) {
+    this._double = _double;
+    return this;
+  }
+
+   /**
+   * Get _double
+   * minimum: 0.8
+   * maximum: 50.2
+   * @return _double
+  **/
+  @javax.annotation.Nullable
+  @JsonProperty(JSON_PROPERTY_DOUBLE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Double getDouble() {
+    return _double;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DOUBLE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setDouble(Double _double) {
+    this._double = _double;
+  }
+
+
+  /**
+   * Return true if this NumberPropertiesOnly object is equal to o.
+   */
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    NumberPropertiesOnly numberPropertiesOnly = (NumberPropertiesOnly) o;
+    return Objects.equals(this.number, numberPropertiesOnly.number) &&
+        Objects.equals(this._float, numberPropertiesOnly._float) &&
+        Objects.equals(this._double, numberPropertiesOnly._double);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(number, _float, _double);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class NumberPropertiesOnly {\n");
+    sb.append("    number: ").append(toIndentedString(number)).append("\n");
+    sb.append("    _float: ").append(toIndentedString(_float)).append("\n");
+    sb.append("    _double: ").append(toIndentedString(_double)).append("\n");
+    sb.append("}");
+    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    ");
+  }
+
+  /**
+   * Convert the instance into URL query string.
+   *
+   * @return URL query string
+   */
+  public String toUrlQueryString() {
+    return toUrlQueryString(null);
+  }
+
+  /**
+   * Convert the instance into URL query string.
+   *
+   * @param prefix prefix of the query string
+   * @return URL query string
+   */
+  public String toUrlQueryString(String prefix) {
+    String suffix = "";
+    String containerSuffix = "";
+    String containerPrefix = "";
+    if (prefix == null) {
+      // style=form, explode=true, e.g. /pet?name=cat&type=manx
+      prefix = "";
+    } else {
+      // deepObject style e.g. /pet?id[name]=cat&id[type]=manx
+      prefix = prefix + "[";
+      suffix = "]";
+      containerSuffix = "]";
+      containerPrefix = "[";
+    }
+
+    StringJoiner joiner = new StringJoiner("&");
+
+    // add `number` to the URL query string
+    if (getNumber() != null) {
+      joiner.add(String.format("%snumber%s=%s", prefix, suffix, URLEncoder.encode(String.valueOf(getNumber()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    // add `float` to the URL query string
+    if (getFloat() != null) {
+      joiner.add(String.format("%sfloat%s=%s", prefix, suffix, URLEncoder.encode(String.valueOf(getFloat()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    // add `double` to the URL query string
+    if (getDouble() != null) {
+      joiner.add(String.format("%sdouble%s=%s", prefix, suffix, URLEncoder.encode(String.valueOf(getDouble()), StandardCharsets.UTF_8).replaceAll("\\+", "%20")));
+    }
+
+    return joiner.toString();
+  }
+}
+

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/model/Pet.java

@@ -58,7 +58,7 @@ public class Pet {
   private List<String> photoUrls = new ArrayList<>();
 
   public static final String JSON_PROPERTY_TAGS = "tags";
-  private List<Tag> tags = new ArrayList<>();
+  private List<Tag> tags;
 
   /**
    * pet status in the store
@@ -184,6 +184,9 @@ public class Pet {
   }
 
   public Pet addPhotoUrlsItem(String photoUrlsItem) {
+    if (this.photoUrls == null) {
+      this.photoUrls = new ArrayList<>();
+    }
     this.photoUrls.add(photoUrlsItem);
     return this;
   }

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/model/Query.java

@@ -117,7 +117,7 @@ public class Query {
 
   public Query addOutcomesItem(OutcomesEnum outcomesItem) {
     if (this.outcomes == null) {
-      this.outcomes = new ArrayList<>();
+      this.outcomes = new ArrayList<>(Arrays.asList(OutcomesEnum.SUCCESS, OutcomesEnum.FAILURE));
     }
     this.outcomes.add(outcomesItem);
     return this;

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/model/TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter.java

@@ -39,7 +39,7 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter {
   public static final String JSON_PROPERTY_VALUES = "values";
-  private List<String> values = new ArrayList<>();
+  private List<String> values;
 
   public TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter() { 
   }

samples/client/echo_api/java/native/src/test/java/org/openapitools/client/CustomTest.java

@@ -168,8 +168,7 @@ public class CustomTest {
 
         Assert.assertNull(d.getArrayStringNullable());
         Assert.assertNull(d.getArrayStringExtensionNullable());
-        Assert.assertEquals(d.getArrayString().size(), 0);
-
+        Assert.assertNull(d.getArrayString());
 
         // test addItem
         d.addArrayStringEnumDefaultItem(DefaultValue.ArrayStringEnumDefaultEnum.UNCLASSIFIED);
@@ -212,9 +211,9 @@ public class CustomTest {
 
         Assert.assertNull(d.getArrayStringNullable());
         Assert.assertNull(d.getArrayStringExtensionNullable());
-        Assert.assertEquals(d.getArrayString().size(), 0);
+        Assert.assertNull(d.getArrayString());
 
-        Assert.assertEquals(apiClient.getObjectMapper().writeValueAsString(d), "{\"array_string_enum_ref_default\":[\"success\",\"failure\"],\"array_string_enum_default\":[\"success\",\"failure\"],\"array_string_default\":[\"failure\",\"skipped\"],\"array_integer_default\":[1,3],\"array_string\":[]}");
+        Assert.assertEquals(apiClient.getObjectMapper().writeValueAsString(d), "{\"array_string_enum_ref_default\":[\"success\",\"failure\"],\"array_string_enum_default\":[\"success\",\"failure\"],\"array_string_default\":[\"failure\",\"skipped\"],\"array_integer_default\":[1,3]}");
     }
 
     @Test
@@ -241,9 +240,9 @@ public class CustomTest {
 
         Assert.assertNull(d.getArrayStringNullable());
         Assert.assertNull(d.getArrayStringExtensionNullable());
-        Assert.assertEquals(d.getArrayString().size(), 0);
+        Assert.assertNull(d.getArrayString());
 
-        Assert.assertEquals(apiClient.getObjectMapper().writeValueAsString(d), "{\"array_string_enum_ref_default\":[\"unclassified\"],\"array_string_enum_default\":[\"unclassified\"],\"array_string_default\":[\"failure\"],\"array_integer_default\":[1,3],\"array_string\":[]}");
+        Assert.assertEquals(apiClient.getObjectMapper().writeValueAsString(d), "{\"array_string_enum_ref_default\":[\"unclassified\"],\"array_string_enum_default\":[\"unclassified\"],\"array_string_default\":[\"failure\"],\"array_integer_default\":[1,3]}");
     }
 
     @Test

samples/client/echo_api/java/native/src/test/java/org/openapitools/client/model/NumberPropertiesOnlyTest.java

@@ -0,0 +1,65 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * 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 org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for NumberPropertiesOnly
+ */
+public class NumberPropertiesOnlyTest {
+    private final NumberPropertiesOnly model = new NumberPropertiesOnly();
+
+    /**
+     * Model tests for NumberPropertiesOnly
+     */
+    @Test
+    public void testNumberPropertiesOnly() {
+        // TODO: test NumberPropertiesOnly
+    }
+
+    /**
+     * Test the property 'number'
+     */
+    @Test
+    public void numberTest() {
+        // TODO: test number
+    }
+
+    /**
+     * Test the property '_float'
+     */
+    @Test
+    public void _floatTest() {
+        // TODO: test _float
+    }
+
+    /**
+     * Test the property '_double'
+     */
+    @Test
+    public void _doubleTest() {
+        // TODO: test _double
+    }
+
+}

samples/client/echo_api/java/okhttp-gson/.openapi-generator/FILES

@@ -13,6 +13,7 @@ docs/DataQueryAllOf.md
 docs/DefaultValue.md
 docs/FormApi.md
 docs/HeaderApi.md
+docs/NumberPropertiesOnly.md
 docs/PathApi.md
 docs/Pet.md
 docs/Query.md
@@ -58,6 +59,7 @@ src/main/java/org/openapitools/client/model/Category.java
 src/main/java/org/openapitools/client/model/DataQuery.java
 src/main/java/org/openapitools/client/model/DataQueryAllOf.java
 src/main/java/org/openapitools/client/model/DefaultValue.java
+src/main/java/org/openapitools/client/model/NumberPropertiesOnly.java
 src/main/java/org/openapitools/client/model/Pet.java
 src/main/java/org/openapitools/client/model/Query.java
 src/main/java/org/openapitools/client/model/StringEnumRef.java

samples/client/echo_api/java/okhttp-gson/README.md

@@ -91,12 +91,11 @@ public class Example {
     defaultClient.setBasePath("http://localhost:3000");
 
     BodyApi apiInstance = new BodyApi(defaultClient);
-    Pet pet = new Pet(); // Pet | Pet object that needs to be added to the store
     try {
-      Pet result = apiInstance.testEchoBodyPet(pet);
+      File result = apiInstance.testBinaryGif();
       System.out.println(result);
     } catch (ApiException e) {
-      System.err.println("Exception when calling BodyApi#testEchoBodyPet");
+      System.err.println("Exception when calling BodyApi#testBinaryGif");
       System.err.println("Status code: " + e.getCode());
       System.err.println("Reason: " + e.getResponseBody());
       System.err.println("Response headers: " + e.getResponseHeaders());
@@ -113,6 +112,7 @@ All URIs are relative to *http://localhost:3000*
 
 Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
+*BodyApi* | [**testBinaryGif**](docs/BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body
 *BodyApi* | [**testEchoBodyPet**](docs/BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
 *FormApi* | [**testFormIntegerBooleanString**](docs/FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
@@ -134,6 +134,7 @@ Class | Method | HTTP request | Description
  - [DataQuery](docs/DataQuery.md)
  - [DataQueryAllOf](docs/DataQueryAllOf.md)
  - [DefaultValue](docs/DefaultValue.md)
+ - [NumberPropertiesOnly](docs/NumberPropertiesOnly.md)
  - [Pet](docs/Pet.md)
  - [Query](docs/Query.md)
  - [StringEnumRef](docs/StringEnumRef.md)

samples/client/echo_api/java/okhttp-gson/api/openapi.yaml

@@ -326,6 +326,22 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: text/plain
+  /binary/gif:
+    post:
+      description: Test binary (gif) response body
+      operationId: test/binary/gif
+      responses:
+        "200":
+          content:
+            image/gif:
+              schema:
+                format: binary
+                type: string
+          description: Successful operation
+      summary: Test binary (gif) response body
+      tags:
+      - body
+      x-accepts: image/gif
 components:
   requestBodies:
     Pet:
@@ -505,6 +521,19 @@ components:
       allOf:
       - $ref: '#/components/schemas/DataQuery_allOf'
       - $ref: '#/components/schemas/Query'
+    NumberPropertiesOnly:
+      properties:
+        number:
+          type: number
+        float:
+          format: float
+          type: number
+        double:
+          format: double
+          maximum: 50.2
+          minimum: 0.8
+          type: number
+      type: object
     test_form_integer_boolean_string_request:
       properties:
         integer_form:

samples/client/echo_api/java/okhttp-gson/docs/BodyApi.md

@@ -4,10 +4,69 @@ All URIs are relative to *http://localhost:3000*
 
 | Method | HTTP request | Description |
 |------------- | ------------- | -------------|
+| [**testBinaryGif**](BodyApi.md#testBinaryGif) | **POST** /binary/gif | Test binary (gif) response body |
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
 
 
+<a name="testBinaryGif"></a>
+# **testBinaryGif**
+> File testBinaryGif()
+
+Test binary (gif) response body
+
+Test binary (gif) response body
+
+### Example
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+  public static void main(String[] args) {
+    ApiClient defaultClient = Configuration.getDefaultApiClient();
+    defaultClient.setBasePath("http://localhost:3000");
+
+    BodyApi apiInstance = new BodyApi(defaultClient);
+    try {
+      File result = apiInstance.testBinaryGif();
+      System.out.println(result);
+    } catch (ApiException e) {
+      System.err.println("Exception when calling BodyApi#testBinaryGif");
+      System.err.println("Status code: " + e.getCode());
+      System.err.println("Reason: " + e.getResponseBody());
+      System.err.println("Response headers: " + e.getResponseHeaders());
+      e.printStackTrace();
+    }
+  }
+}
+```
+
+### Parameters
+This endpoint does not need any parameter.
+
+### Return type
+
+[**File**](File.md)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: image/gif
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
 <a name="testEchoBodyPet"></a>
 # **testEchoBodyPet**
 > Pet testEchoBodyPet(pet)

samples/client/echo_api/java/okhttp-gson/docs/NumberPropertiesOnly.md

@@ -0,0 +1,15 @@
+
+
+# NumberPropertiesOnly
+
+
+## Properties
+
+| Name | Type | Description | Notes |
+|------------ | ------------- | ------------- | -------------|
+|**number** | **BigDecimal** |  |  [optional] |
+|**_float** | **Float** |  |  [optional] |
+|**_double** | **Double** |  |  [optional] |
+
+
+

samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/JSON.java

@@ -98,6 +98,7 @@ public class JSON {
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.DataQuery.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.DataQueryAllOf.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.DefaultValue.CustomTypeAdapterFactory());
+        gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.NumberPropertiesOnly.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.Pet.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.Tag.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.CustomTypeAdapterFactory());

samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/BodyApi.java

@@ -27,6 +27,7 @@ import com.google.gson.reflect.TypeToken;
 import java.io.IOException;
 
 
+import java.io.File;
 import org.openapitools.client.model.Pet;
 
 import java.lang.reflect.Type;
@@ -73,6 +74,119 @@ public class BodyApi {
         this.localCustomBaseUrl = customBaseUrl;
     }
 
+    /**
+     * Build call for testBinaryGif
+     * @param _callback Callback for upload/download progress
+     * @return Call to execute
+     * @throws ApiException If fail to serialize the request body object
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testBinaryGifCall(final ApiCallback _callback) throws ApiException {
+        String basePath = null;
+        // Operation Servers
+        String[] localBasePaths = new String[] {  };
+
+        // Determine Base Path to Use
+        if (localCustomBaseUrl != null){
+            basePath = localCustomBaseUrl;
+        } else if ( localBasePaths.length > 0 ) {
+            basePath = localBasePaths[localHostIndex];
+        } else {
+            basePath = null;
+        }
+
+        Object localVarPostBody = null;
+
+        // create path and map variables
+        String localVarPath = "/binary/gif";
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+        Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+        Map<String, String> localVarCookieParams = new HashMap<String, String>();
+        Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+        final String[] localVarAccepts = {
+            "image/gif"
+        };
+        final String localVarAccept = localVarApiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) {
+            localVarHeaderParams.put("Accept", localVarAccept);
+        }
+
+        final String[] localVarContentTypes = {
+        };
+        final String localVarContentType = localVarApiClient.selectHeaderContentType(localVarContentTypes);
+        if (localVarContentType != null) {
+            localVarHeaderParams.put("Content-Type", localVarContentType);
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return localVarApiClient.buildCall(basePath, localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAuthNames, _callback);
+    }
+
+    @SuppressWarnings("rawtypes")
+    private okhttp3.Call testBinaryGifValidateBeforeCall(final ApiCallback _callback) throws ApiException {
+        return testBinaryGifCall(_callback);
+
+    }
+
+    /**
+     * Test binary (gif) response body
+     * Test binary (gif) response body
+     * @return File
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public File testBinaryGif() throws ApiException {
+        ApiResponse<File> localVarResp = testBinaryGifWithHttpInfo();
+        return localVarResp.getData();
+    }
+
+    /**
+     * Test binary (gif) response body
+     * Test binary (gif) response body
+     * @return ApiResponse&lt;File&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public ApiResponse<File> testBinaryGifWithHttpInfo() throws ApiException {
+        okhttp3.Call localVarCall = testBinaryGifValidateBeforeCall(null);
+        Type localVarReturnType = new TypeToken<File>(){}.getType();
+        return localVarApiClient.execute(localVarCall, localVarReturnType);
+    }
+
+    /**
+     * Test binary (gif) response body (asynchronously)
+     * Test binary (gif) response body
+     * @param _callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testBinaryGifAsync(final ApiCallback<File> _callback) throws ApiException {
+
+        okhttp3.Call localVarCall = testBinaryGifValidateBeforeCall(_callback);
+        Type localVarReturnType = new TypeToken<File>(){}.getType();
+        localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
+        return localVarCall;
+    }
     /**
      * Build call for testEchoBodyPet
      * @param pet Pet object that needs to be added to the store (optional)

samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/model/DefaultValue.java

@@ -119,7 +119,7 @@ public class DefaultValue {
 
   public static final String SERIALIZED_NAME_ARRAY_STRING = "array_string";
   @SerializedName(SERIALIZED_NAME_ARRAY_STRING)
-  private List<String> arrayString = new ArrayList<>();
+  private List<String> arrayString;
 
   public static final String SERIALIZED_NAME_ARRAY_STRING_NULLABLE = "array_string_nullable";
   @SerializedName(SERIALIZED_NAME_ARRAY_STRING_NULLABLE)
@@ -293,6 +293,9 @@ public class DefaultValue {
   }
 
   public DefaultValue addArrayStringNullableItem(String arrayStringNullableItem) {
+    if (this.arrayStringNullable == null) {
+      this.arrayStringNullable = new ArrayList<>();
+    }
     this.arrayStringNullable.add(arrayStringNullableItem);
     return this;
   }
@@ -320,6 +323,9 @@ public class DefaultValue {
   }
 
   public DefaultValue addArrayStringExtensionNullableItem(String arrayStringExtensionNullableItem) {
+    if (this.arrayStringExtensionNullable == null) {
+      this.arrayStringExtensionNullable = new ArrayList<>();
+    }
     this.arrayStringExtensionNullable.add(arrayStringExtensionNullableItem);
     return this;
   }

samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/model/NumberPropertiesOnly.java

@@ -0,0 +1,263 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import java.io.IOException;
+import java.math.BigDecimal;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.google.gson.TypeAdapterFactory;
+import com.google.gson.reflect.TypeToken;
+
+import java.lang.reflect.Type;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import org.openapitools.client.JSON;
+
+/**
+ * NumberPropertiesOnly
+ */
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class NumberPropertiesOnly {
+  public static final String SERIALIZED_NAME_NUMBER = "number";
+  @SerializedName(SERIALIZED_NAME_NUMBER)
+  private BigDecimal number;
+
+  public static final String SERIALIZED_NAME_FLOAT = "float";
+  @SerializedName(SERIALIZED_NAME_FLOAT)
+  private Float _float;
+
+  public static final String SERIALIZED_NAME_DOUBLE = "double";
+  @SerializedName(SERIALIZED_NAME_DOUBLE)
+  private Double _double;
+
+  public NumberPropertiesOnly() {
+  }
+
+  public NumberPropertiesOnly number(BigDecimal number) {
+    
+    this.number = number;
+    return this;
+  }
+
+   /**
+   * Get number
+   * @return number
+  **/
+  @javax.annotation.Nullable
+
+  public BigDecimal getNumber() {
+    return number;
+  }
+
+
+  public void setNumber(BigDecimal number) {
+    this.number = number;
+  }
+
+
+  public NumberPropertiesOnly _float(Float _float) {
+    
+    this._float = _float;
+    return this;
+  }
+
+   /**
+   * Get _float
+   * @return _float
+  **/
+  @javax.annotation.Nullable
+
+  public Float getFloat() {
+    return _float;
+  }
+
+
+  public void setFloat(Float _float) {
+    this._float = _float;
+  }
+
+
+  public NumberPropertiesOnly _double(Double _double) {
+    
+    this._double = _double;
+    return this;
+  }
+
+   /**
+   * Get _double
+   * minimum: 0.8
+   * maximum: 50.2
+   * @return _double
+  **/
+  @javax.annotation.Nullable
+
+  public Double getDouble() {
+    return _double;
+  }
+
+
+  public void setDouble(Double _double) {
+    this._double = _double;
+  }
+
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    NumberPropertiesOnly numberPropertiesOnly = (NumberPropertiesOnly) o;
+    return Objects.equals(this.number, numberPropertiesOnly.number) &&
+        Objects.equals(this._float, numberPropertiesOnly._float) &&
+        Objects.equals(this._double, numberPropertiesOnly._double);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(number, _float, _double);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class NumberPropertiesOnly {\n");
+    sb.append("    number: ").append(toIndentedString(number)).append("\n");
+    sb.append("    _float: ").append(toIndentedString(_float)).append("\n");
+    sb.append("    _double: ").append(toIndentedString(_double)).append("\n");
+    sb.append("}");
+    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    ");
+  }
+
+
+  public static HashSet<String> openapiFields;
+  public static HashSet<String> openapiRequiredFields;
+
+  static {
+    // a set of all properties/fields (JSON key names)
+    openapiFields = new HashSet<String>();
+    openapiFields.add("number");
+    openapiFields.add("float");
+    openapiFields.add("double");
+
+    // a set of required properties/fields (JSON key names)
+    openapiRequiredFields = new HashSet<String>();
+  }
+
+ /**
+  * Validates the JSON Object and throws an exception if issues found
+  *
+  * @param jsonObj JSON Object
+  * @throws IOException if the JSON Object is invalid with respect to NumberPropertiesOnly
+  */
+  public static void validateJsonObject(JsonObject jsonObj) throws IOException {
+      if (jsonObj == null) {
+        if (!NumberPropertiesOnly.openapiRequiredFields.isEmpty()) { // has required fields but JSON object is null
+          throw new IllegalArgumentException(String.format("The required field(s) %s in NumberPropertiesOnly is not found in the empty JSON string", NumberPropertiesOnly.openapiRequiredFields.toString()));
+        }
+      }
+
+      Set<Entry<String, JsonElement>> entries = jsonObj.entrySet();
+      // check to see if the JSON string contains additional fields
+      for (Entry<String, JsonElement> entry : entries) {
+        if (!NumberPropertiesOnly.openapiFields.contains(entry.getKey())) {
+          throw new IllegalArgumentException(String.format("The field `%s` in the JSON string is not defined in the `NumberPropertiesOnly` properties. JSON: %s", entry.getKey(), jsonObj.toString()));
+        }
+      }
+  }
+
+  public static class CustomTypeAdapterFactory implements TypeAdapterFactory {
+    @SuppressWarnings("unchecked")
+    @Override
+    public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
+       if (!NumberPropertiesOnly.class.isAssignableFrom(type.getRawType())) {
+         return null; // this class only serializes 'NumberPropertiesOnly' and its subtypes
+       }
+       final TypeAdapter<JsonElement> elementAdapter = gson.getAdapter(JsonElement.class);
+       final TypeAdapter<NumberPropertiesOnly> thisAdapter
+                        = gson.getDelegateAdapter(this, TypeToken.get(NumberPropertiesOnly.class));
+
+       return (TypeAdapter<T>) new TypeAdapter<NumberPropertiesOnly>() {
+           @Override
+           public void write(JsonWriter out, NumberPropertiesOnly value) throws IOException {
+             JsonObject obj = thisAdapter.toJsonTree(value).getAsJsonObject();
+             elementAdapter.write(out, obj);
+           }
+
+           @Override
+           public NumberPropertiesOnly read(JsonReader in) throws IOException {
+             JsonObject jsonObj = elementAdapter.read(in).getAsJsonObject();
+             validateJsonObject(jsonObj);
+             return thisAdapter.fromJsonTree(jsonObj);
+           }
+
+       }.nullSafe();
+    }
+  }
+
+ /**
+  * Create an instance of NumberPropertiesOnly given an JSON string
+  *
+  * @param jsonString JSON string
+  * @return An instance of NumberPropertiesOnly
+  * @throws IOException if the JSON string is invalid with respect to NumberPropertiesOnly
+  */
+  public static NumberPropertiesOnly fromJson(String jsonString) throws IOException {
+    return JSON.getGson().fromJson(jsonString, NumberPropertiesOnly.class);
+  }
+
+ /**
+  * Convert an instance of NumberPropertiesOnly to an JSON string
+  *
+  * @return JSON string
+  */
+  public String toJson() {
+    return JSON.getGson().toJson(this);
+  }
+}
+

samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/model/Pet.java

@@ -70,7 +70,7 @@ public class Pet {
 
   public static final String SERIALIZED_NAME_TAGS = "tags";
   @SerializedName(SERIALIZED_NAME_TAGS)
-  private List<Tag> tags = new ArrayList<>();
+  private List<Tag> tags;
 
   /**
    * pet status in the store
@@ -201,6 +201,9 @@ public class Pet {
   }
 
   public Pet addPhotoUrlsItem(String photoUrlsItem) {
+    if (this.photoUrls == null) {
+      this.photoUrls = new ArrayList<>();
+    }
     this.photoUrls.add(photoUrlsItem);
     return this;
   }

samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/model/TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter.java

@@ -52,7 +52,7 @@ import org.openapitools.client.JSON;
 public class TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter {
   public static final String SERIALIZED_NAME_VALUES = "values";
   @SerializedName(SERIALIZED_NAME_VALUES)
-  private List<String> values = new ArrayList<>();
+  private List<String> values;
 
   public TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter() {
   }

samples/client/echo_api/java/okhttp-gson/src/test/java/org/openapitools/client/model/NumberPropertiesOnlyTest.java

@@ -0,0 +1,65 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * 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.google.gson.TypeAdapter;
+import com.google.gson.annotations.JsonAdapter;
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import java.io.IOException;
+import java.math.BigDecimal;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+
+/**
+ * Model tests for NumberPropertiesOnly
+ */
+public class NumberPropertiesOnlyTest {
+    private final NumberPropertiesOnly model = new NumberPropertiesOnly();
+
+    /**
+     * Model tests for NumberPropertiesOnly
+     */
+    @Test
+    public void testNumberPropertiesOnly() {
+        // TODO: test NumberPropertiesOnly
+    }
+
+    /**
+     * Test the property 'number'
+     */
+    @Test
+    public void numberTest() {
+        // TODO: test number
+    }
+
+    /**
+     * Test the property '_float'
+     */
+    @Test
+    public void _floatTest() {
+        // TODO: test _float
+    }
+
+    /**
+     * Test the property '_double'
+     */
+    @Test
+    public void _doubleTest() {
+        // TODO: test _double
+    }
+
+}