Allow Java apache-httpclient users to supply additional HTTP headers per call, updated (#14929)

* Allow Java apache-httpclient users to supply additional HTTP headers per API call

* fix 'unexpected return value' problem

* make "fullJavaUtil" work

* Revert 'make "fullJavaUtil" work'

This reverts commit 60c8846.

---------

Co-authored-by: Jigar Joshi <jigarjm@gmail.com>

modules/openapi-generator/src/main/resources/Java/libraries/apache-httpclient/api.mustache

@@ -15,6 +15,7 @@ import {{invokerPackage}}.Pair;
 
 {{^fullJavaUtil}}
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -24,6 +25,8 @@ import java.util.StringJoiner;
 {{>generatedAnnotation}}
 {{#operations}}
 public class {{classname}} {
+
+
   private ApiClient apiClient;
 
   public {{classname}}() {
@@ -65,6 +68,33 @@ public class {{classname}} {
   @Deprecated
   {{/isDeprecated}}
   public {{#returnType}}{{{returnType}}} {{/returnType}}{{^returnType}}void {{/returnType}}{{operationId}}({{#allParams}}{{{dataType}}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}) throws ApiException {
+    {{#returnType}}return {{/returnType}}this.{{operationId}}({{#allParams}}{{paramName}}, {{/allParams}}Collections.emptyMap());
+  }
+
+
+  /**
+   * {{summary}}
+   * {{notes}}
+   {{#allParams}}
+   * @param {{paramName}} {{description}}{{#required}} (required){{/required}}{{^required}} (optional{{^isContainer}}{{#defaultValue}}, default to {{.}}{{/defaultValue}}){{/isContainer}}{{/required}}
+   {{/allParams}}
+   * @param additionalHeaders additionalHeaders for this call
+   {{#returnType}}
+   * @return {{returnType}}
+   {{/returnType}}
+   * @throws ApiException if fails to make API call
+   {{#isDeprecated}}
+   * @deprecated
+   {{/isDeprecated}}
+   {{#externalDocs}}
+   * {{description}}
+   * @see <a href="{{url}}">{{summary}} Documentation</a>
+   {{/externalDocs}}
+   */
+  {{#isDeprecated}}
+  @Deprecated
+  {{/isDeprecated}}
+  public {{#returnType}}{{{returnType}}} {{/returnType}}{{^returnType}}void {{/returnType}}{{operationId}}({{#allParams}}{{{dataType}}} {{paramName}}, {{/allParams}}Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = {{#bodyParam}}{{paramName}}{{/bodyParam}}{{^bodyParam}}null{{/bodyParam}};
     {{#allParams}}{{#required}}
     // verify the required parameter '{{paramName}}' is set
@@ -126,6 +156,8 @@ public class {{classname}} {
       localVarHeaderParams.put("{{baseName}}", apiClient.parameterToString({{paramName}}));
     {{/headerParams}}
 
+    localVarHeaderParams.putAll(additionalHeaders);
+
     {{#cookieParams}}if ({{paramName}} != null)
       localVarCookieParams.put("{{baseName}}", apiClient.parameterToString({{paramName}}));
     {{/cookieParams}}
@@ -168,6 +200,7 @@ public class {{classname}} {
         {{#returnType}}localVarReturnType{{/returnType}}{{^returnType}}null{{/returnType}}
     );
   }
+
   {{/operation}}
 }
 {{/operations}}

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

@@ -24,6 +24,7 @@ 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 +32,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class BodyApi {
+
+
   private ApiClient apiClient;
 
   public BodyApi() {
@@ -57,6 +60,19 @@ 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 +87,8 @@ public class BodyApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -102,6 +120,7 @@ public class BodyApi {
         localVarReturnType
     );
   }
+
   /**
    * Test empty response body
    * Test empty response body
@@ -110,6 +129,19 @@ 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 +156,8 @@ public class BodyApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -155,4 +189,5 @@ 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/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/AnotherFakeApi.java

@@ -24,6 +24,7 @@ import org.openapitools.client.model.Client;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -31,6 +32,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class AnotherFakeApi {
+
+
   private ApiClient apiClient;
 
   public AnotherFakeApi() {
@@ -57,6 +60,19 @@ public class AnotherFakeApi {
    * @throws ApiException if fails to make API call
    */
   public Client call123testSpecialTags(Client client) throws ApiException {
+    return this.call123testSpecialTags(client, Collections.emptyMap());
+  }
+
+
+  /**
+   * To test special tags
+   * To test special tags and operation ID starting with number
+   * @param client client model (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return Client
+   * @throws ApiException if fails to make API call
+   */
+  public Client call123testSpecialTags(Client client, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = client;
     
     // verify the required parameter 'client' is set
@@ -76,6 +92,8 @@ public class AnotherFakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -107,4 +125,5 @@ public class AnotherFakeApi {
         localVarReturnType
     );
   }
+
 }

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/DefaultApi.java

@@ -24,6 +24,7 @@ import org.openapitools.client.model.FooGetDefaultResponse;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -31,6 +32,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class DefaultApi {
+
+
   private ApiClient apiClient;
 
   public DefaultApi() {
@@ -56,6 +59,18 @@ public class DefaultApi {
    * @throws ApiException if fails to make API call
    */
   public FooGetDefaultResponse fooGet() throws ApiException {
+    return this.fooGet(Collections.emptyMap());
+  }
+
+
+  /**
+   * 
+   * 
+   * @param additionalHeaders additionalHeaders for this call
+   * @return FooGetDefaultResponse
+   * @throws ApiException if fails to make API call
+   */
+  public FooGetDefaultResponse fooGet(Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -70,6 +85,8 @@ public class DefaultApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -101,4 +118,5 @@ public class DefaultApi {
         localVarReturnType
     );
   }
+
 }

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/FakeApi.java

@@ -35,6 +35,7 @@ import org.openapitools.client.model.User;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -42,6 +43,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FakeApi {
+
+
   private ApiClient apiClient;
 
   public FakeApi() {
@@ -67,6 +70,18 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public HealthCheckResult fakeHealthGet() throws ApiException {
+    return this.fakeHealthGet(Collections.emptyMap());
+  }
+
+
+  /**
+   * Health check endpoint
+   * 
+   * @param additionalHeaders additionalHeaders for this call
+   * @return HealthCheckResult
+   * @throws ApiException if fails to make API call
+   */
+  public HealthCheckResult fakeHealthGet(Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -81,6 +96,8 @@ public class FakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -112,6 +129,7 @@ public class FakeApi {
         localVarReturnType
     );
   }
+
   /**
    * test http signature authentication
    * 
@@ -121,6 +139,20 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public void fakeHttpSignatureTest(Pet pet, String query1, String header1) throws ApiException {
+    this.fakeHttpSignatureTest(pet, query1, header1, Collections.emptyMap());
+  }
+
+
+  /**
+   * test http signature authentication
+   * 
+   * @param pet Pet object that needs to be added to the store (required)
+   * @param query1 query parameter (optional)
+   * @param header1 header parameter (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void fakeHttpSignatureTest(Pet pet, String query1, String header1, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = pet;
     
     // verify the required parameter 'pet' is set
@@ -143,6 +175,8 @@ public class FakeApi {
     if (header1 != null)
       localVarHeaderParams.put("header_1", apiClient.parameterToString(header1));
 
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -173,6 +207,7 @@ public class FakeApi {
         null
     );
   }
+
   /**
    * 
    * Test serialization of outer boolean types
@@ -181,6 +216,19 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public Boolean fakeOuterBooleanSerialize(Boolean body) throws ApiException {
+    return this.fakeOuterBooleanSerialize(body, Collections.emptyMap());
+  }
+
+
+  /**
+   * 
+   * Test serialization of outer boolean types
+   * @param body Input boolean as post body (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return Boolean
+   * @throws ApiException if fails to make API call
+   */
+  public Boolean fakeOuterBooleanSerialize(Boolean body, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = body;
     
     // create path and map variables
@@ -195,6 +243,8 @@ public class FakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -226,6 +276,7 @@ public class FakeApi {
         localVarReturnType
     );
   }
+
   /**
    * 
    * Test serialization of object with outer number type
@@ -234,6 +285,19 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public OuterComposite fakeOuterCompositeSerialize(OuterComposite outerComposite) throws ApiException {
+    return this.fakeOuterCompositeSerialize(outerComposite, Collections.emptyMap());
+  }
+
+
+  /**
+   * 
+   * Test serialization of object with outer number type
+   * @param outerComposite Input composite as post body (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return OuterComposite
+   * @throws ApiException if fails to make API call
+   */
+  public OuterComposite fakeOuterCompositeSerialize(OuterComposite outerComposite, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = outerComposite;
     
     // create path and map variables
@@ -248,6 +312,8 @@ public class FakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -279,6 +345,7 @@ public class FakeApi {
         localVarReturnType
     );
   }
+
   /**
    * 
    * Test serialization of outer number types
@@ -287,6 +354,19 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public BigDecimal fakeOuterNumberSerialize(BigDecimal body) throws ApiException {
+    return this.fakeOuterNumberSerialize(body, Collections.emptyMap());
+  }
+
+
+  /**
+   * 
+   * Test serialization of outer number types
+   * @param body Input number as post body (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return BigDecimal
+   * @throws ApiException if fails to make API call
+   */
+  public BigDecimal fakeOuterNumberSerialize(BigDecimal body, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = body;
     
     // create path and map variables
@@ -301,6 +381,8 @@ public class FakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -332,6 +414,7 @@ public class FakeApi {
         localVarReturnType
     );
   }
+
   /**
    * 
    * Test serialization of outer string types
@@ -340,6 +423,19 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public String fakeOuterStringSerialize(String body) throws ApiException {
+    return this.fakeOuterStringSerialize(body, Collections.emptyMap());
+  }
+
+
+  /**
+   * 
+   * Test serialization of outer string types
+   * @param body Input string as post body (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String fakeOuterStringSerialize(String body, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = body;
     
     // create path and map variables
@@ -354,6 +450,8 @@ public class FakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -385,6 +483,7 @@ public class FakeApi {
         localVarReturnType
     );
   }
+
   /**
    * 
    * Test serialization of enum (int) properties with examples
@@ -393,6 +492,19 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public OuterObjectWithEnumProperty fakePropertyEnumIntegerSerialize(OuterObjectWithEnumProperty outerObjectWithEnumProperty) throws ApiException {
+    return this.fakePropertyEnumIntegerSerialize(outerObjectWithEnumProperty, Collections.emptyMap());
+  }
+
+
+  /**
+   * 
+   * Test serialization of enum (int) properties with examples
+   * @param outerObjectWithEnumProperty Input enum (int) as post body (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return OuterObjectWithEnumProperty
+   * @throws ApiException if fails to make API call
+   */
+  public OuterObjectWithEnumProperty fakePropertyEnumIntegerSerialize(OuterObjectWithEnumProperty outerObjectWithEnumProperty, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = outerObjectWithEnumProperty;
     
     // verify the required parameter 'outerObjectWithEnumProperty' is set
@@ -412,6 +524,8 @@ public class FakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -443,6 +557,7 @@ public class FakeApi {
         localVarReturnType
     );
   }
+
   /**
    * 
    * For this test, the body has to be a binary file.
@@ -450,6 +565,18 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public void testBodyWithBinary(File body) throws ApiException {
+    this.testBodyWithBinary(body, Collections.emptyMap());
+  }
+
+
+  /**
+   * 
+   * For this test, the body has to be a binary file.
+   * @param body image to upload (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void testBodyWithBinary(File body, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = body;
     
     // verify the required parameter 'body' is set
@@ -469,6 +596,8 @@ public class FakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -499,6 +628,7 @@ public class FakeApi {
         null
     );
   }
+
   /**
    * 
    * For this test, the body for this request must reference a schema named &#x60;File&#x60;.
@@ -506,6 +636,18 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public void testBodyWithFileSchema(FileSchemaTestClass fileSchemaTestClass) throws ApiException {
+    this.testBodyWithFileSchema(fileSchemaTestClass, Collections.emptyMap());
+  }
+
+
+  /**
+   * 
+   * For this test, the body for this request must reference a schema named &#x60;File&#x60;.
+   * @param fileSchemaTestClass  (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void testBodyWithFileSchema(FileSchemaTestClass fileSchemaTestClass, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = fileSchemaTestClass;
     
     // verify the required parameter 'fileSchemaTestClass' is set
@@ -525,6 +667,8 @@ public class FakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -555,6 +699,7 @@ public class FakeApi {
         null
     );
   }
+
   /**
    * 
    * 
@@ -563,6 +708,19 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public void testBodyWithQueryParams(String query, User user) throws ApiException {
+    this.testBodyWithQueryParams(query, user, Collections.emptyMap());
+  }
+
+
+  /**
+   * 
+   * 
+   * @param query  (required)
+   * @param user  (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void testBodyWithQueryParams(String query, User user, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = user;
     
     // verify the required parameter 'query' is set
@@ -588,6 +746,8 @@ public class FakeApi {
 
     localVarQueryParams.addAll(apiClient.parameterToPair("query", query));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -618,6 +778,7 @@ public class FakeApi {
         null
     );
   }
+
   /**
    * To test \&quot;client\&quot; model
    * To test \&quot;client\&quot; model
@@ -626,6 +787,19 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public Client testClientModel(Client client) throws ApiException {
+    return this.testClientModel(client, Collections.emptyMap());
+  }
+
+
+  /**
+   * To test \&quot;client\&quot; model
+   * To test \&quot;client\&quot; model
+   * @param client client model (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return Client
+   * @throws ApiException if fails to make API call
+   */
+  public Client testClientModel(Client client, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = client;
     
     // verify the required parameter 'client' is set
@@ -645,6 +819,8 @@ public class FakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -676,6 +852,7 @@ public class FakeApi {
         localVarReturnType
     );
   }
+
   /**
    * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
    * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
@@ -696,6 +873,31 @@ public class FakeApi {
    * @throws ApiException if fails to make API call
    */
   public void testEndpointParameters(BigDecimal number, Double _double, String patternWithoutDelimiter, byte[] _byte, Integer integer, Integer int32, Long int64, Float _float, String string, File binary, LocalDate date, OffsetDateTime dateTime, String password, String paramCallback) throws ApiException {
+    this.testEndpointParameters(number, _double, patternWithoutDelimiter, _byte, integer, int32, int64, _float, string, binary, date, dateTime, password, paramCallback, Collections.emptyMap());
+  }
+
+
+  /**
+   * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
+   * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
+   * @param number None (required)
+   * @param _double None (required)
+   * @param patternWithoutDelimiter None (required)
+   * @param _byte None (required)
+   * @param integer None (optional)
+   * @param int32 None (optional)
+   * @param int64 None (optional)
+   * @param _float None (optional)
+   * @param string None (optional)
+   * @param binary None (optional)
+   * @param date None (optional)
+   * @param dateTime None (optional)
+   * @param password None (optional)
+   * @param paramCallback None (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void testEndpointParameters(BigDecimal number, Double _double, String patternWithoutDelimiter, byte[] _byte, Integer integer, Integer int32, Long int64, Float _float, String string, File binary, LocalDate date, OffsetDateTime dateTime, String password, String paramCallback, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'number' is set
@@ -730,6 +932,8 @@ public class FakeApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     if (integer != null)
       localVarFormParams.put("integer", integer);
@@ -788,6 +992,7 @@ if (paramCallback != null)
         null
     );
   }
+
   /**
    * To test enum parameters
    * To test enum parameters
@@ -803,6 +1008,26 @@ if (paramCallback != null)
    * @throws ApiException if fails to make API call
    */
   public void testEnumParameters(List<String> enumHeaderStringArray, String enumHeaderString, List<String> enumQueryStringArray, String enumQueryString, Integer enumQueryInteger, Double enumQueryDouble, List<EnumClass> enumQueryModelArray, List<String> enumFormStringArray, String enumFormString) throws ApiException {
+    this.testEnumParameters(enumHeaderStringArray, enumHeaderString, enumQueryStringArray, enumQueryString, enumQueryInteger, enumQueryDouble, enumQueryModelArray, enumFormStringArray, enumFormString, Collections.emptyMap());
+  }
+
+
+  /**
+   * To test enum parameters
+   * To test enum parameters
+   * @param enumHeaderStringArray Header parameter enum test (string array) (optional
+   * @param enumHeaderString Header parameter enum test (string) (optional, default to -efg)
+   * @param enumQueryStringArray Query parameter enum test (string array) (optional
+   * @param enumQueryString Query parameter enum test (string) (optional, default to -efg)
+   * @param enumQueryInteger Query parameter enum test (double) (optional)
+   * @param enumQueryDouble Query parameter enum test (double) (optional)
+   * @param enumQueryModelArray  (optional
+   * @param enumFormStringArray Form parameter enum test (string array) (optional
+   * @param enumFormString Form parameter enum test (string) (optional, default to -efg)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void testEnumParameters(List<String> enumHeaderStringArray, String enumHeaderString, List<String> enumQueryStringArray, String enumQueryString, Integer enumQueryInteger, Double enumQueryDouble, List<EnumClass> enumQueryModelArray, List<String> enumFormStringArray, String enumFormString, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -826,6 +1051,8 @@ if (paramCallback != null)
 if (enumHeaderString != null)
       localVarHeaderParams.put("enum_header_string", apiClient.parameterToString(enumHeaderString));
 
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     if (enumFormStringArray != null)
       localVarFormParams.put("enum_form_string_array", enumFormStringArray);
@@ -860,6 +1087,7 @@ if (enumFormString != null)
         null
     );
   }
+
   /**
    * Fake endpoint to test group parameters (optional)
    * Fake endpoint to test group parameters (optional)
@@ -872,6 +1100,23 @@ if (enumFormString != null)
    * @throws ApiException if fails to make API call
    */
   public void testGroupParameters(Integer requiredStringGroup, Boolean requiredBooleanGroup, Long requiredInt64Group, Integer stringGroup, Boolean booleanGroup, Long int64Group) throws ApiException {
+    this.testGroupParameters(requiredStringGroup, requiredBooleanGroup, requiredInt64Group, stringGroup, booleanGroup, int64Group, Collections.emptyMap());
+  }
+
+
+  /**
+   * Fake endpoint to test group parameters (optional)
+   * Fake endpoint to test group parameters (optional)
+   * @param requiredStringGroup Required String in group parameters (required)
+   * @param requiredBooleanGroup Required Boolean in group parameters (required)
+   * @param requiredInt64Group Required Integer in group parameters (required)
+   * @param stringGroup String in group parameters (optional)
+   * @param booleanGroup Boolean in group parameters (optional)
+   * @param int64Group Integer in group parameters (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void testGroupParameters(Integer requiredStringGroup, Boolean requiredBooleanGroup, Long requiredInt64Group, Integer stringGroup, Boolean booleanGroup, Long int64Group, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'requiredStringGroup' is set
@@ -909,6 +1154,8 @@ if (enumFormString != null)
 if (booleanGroup != null)
       localVarHeaderParams.put("boolean_group", apiClient.parameterToString(booleanGroup));
 
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -939,6 +1186,7 @@ if (booleanGroup != null)
         null
     );
   }
+
   /**
    * test inline additionalProperties
    * 
@@ -946,6 +1194,18 @@ if (booleanGroup != null)
    * @throws ApiException if fails to make API call
    */
   public void testInlineAdditionalProperties(Map<String, String> requestBody) throws ApiException {
+    this.testInlineAdditionalProperties(requestBody, Collections.emptyMap());
+  }
+
+
+  /**
+   * test inline additionalProperties
+   * 
+   * @param requestBody request body (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void testInlineAdditionalProperties(Map<String, String> requestBody, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = requestBody;
     
     // verify the required parameter 'requestBody' is set
@@ -965,6 +1225,8 @@ if (booleanGroup != null)
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -995,6 +1257,7 @@ if (booleanGroup != null)
         null
     );
   }
+
   /**
    * test json serialization of form data
    * 
@@ -1003,6 +1266,19 @@ if (booleanGroup != null)
    * @throws ApiException if fails to make API call
    */
   public void testJsonFormData(String param, String param2) throws ApiException {
+    this.testJsonFormData(param, param2, Collections.emptyMap());
+  }
+
+
+  /**
+   * test json serialization of form data
+   * 
+   * @param param field1 (required)
+   * @param param2 field2 (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void testJsonFormData(String param, String param2, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'param' is set
@@ -1027,6 +1303,8 @@ if (booleanGroup != null)
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     if (param != null)
       localVarFormParams.put("param", param);
@@ -1061,6 +1339,7 @@ if (param2 != null)
         null
     );
   }
+
   /**
    * 
    * To test the collection format in query parameters
@@ -1074,6 +1353,24 @@ if (param2 != null)
    * @throws ApiException if fails to make API call
    */
   public void testQueryParameterCollectionFormat(List<String> pipe, List<String> ioutil, List<String> http, List<String> url, List<String> context, String allowEmpty, Map<String, String> language) throws ApiException {
+    this.testQueryParameterCollectionFormat(pipe, ioutil, http, url, context, allowEmpty, language, Collections.emptyMap());
+  }
+
+
+  /**
+   * 
+   * To test the collection format in query parameters
+   * @param pipe  (required)
+   * @param ioutil  (required)
+   * @param http  (required)
+   * @param url  (required)
+   * @param context  (required)
+   * @param allowEmpty  (required)
+   * @param language  (optional
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void testQueryParameterCollectionFormat(List<String> pipe, List<String> ioutil, List<String> http, List<String> url, List<String> context, String allowEmpty, Map<String, String> language, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'pipe' is set
@@ -1125,6 +1422,8 @@ if (param2 != null)
     localVarQueryParams.addAll(apiClient.parameterToPair("language", language));
     localVarQueryParams.addAll(apiClient.parameterToPair("allowEmpty", allowEmpty));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -1155,4 +1454,5 @@ if (param2 != null)
         null
     );
   }
+
 }

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java

@@ -24,6 +24,7 @@ import org.openapitools.client.model.Client;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -31,6 +32,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class FakeClassnameTags123Api {
+
+
   private ApiClient apiClient;
 
   public FakeClassnameTags123Api() {
@@ -57,6 +60,19 @@ public class FakeClassnameTags123Api {
    * @throws ApiException if fails to make API call
    */
   public Client testClassname(Client client) throws ApiException {
+    return this.testClassname(client, Collections.emptyMap());
+  }
+
+
+  /**
+   * To test class name in snake case
+   * To test class name in snake case
+   * @param client client model (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return Client
+   * @throws ApiException if fails to make API call
+   */
+  public Client testClassname(Client client, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = client;
     
     // verify the required parameter 'client' is set
@@ -76,6 +92,8 @@ public class FakeClassnameTags123Api {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -107,4 +125,5 @@ public class FakeClassnameTags123Api {
         localVarReturnType
     );
   }
+
 }

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/PetApi.java

@@ -27,6 +27,7 @@ import java.util.Set;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -34,6 +35,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class PetApi {
+
+
   private ApiClient apiClient;
 
   public PetApi() {
@@ -59,6 +62,18 @@ public class PetApi {
    * @throws ApiException if fails to make API call
    */
   public void addPet(Pet pet) throws ApiException {
+    this.addPet(pet, Collections.emptyMap());
+  }
+
+
+  /**
+   * Add a new pet to the store
+   * 
+   * @param pet Pet object that needs to be added to the store (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void addPet(Pet pet, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = pet;
     
     // verify the required parameter 'pet' is set
@@ -78,6 +93,8 @@ public class PetApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -108,6 +125,7 @@ public class PetApi {
         null
     );
   }
+
   /**
    * Deletes a pet
    * 
@@ -116,6 +134,19 @@ public class PetApi {
    * @throws ApiException if fails to make API call
    */
   public void deletePet(Long petId, String apiKey) throws ApiException {
+    this.deletePet(petId, apiKey, Collections.emptyMap());
+  }
+
+
+  /**
+   * Deletes a pet
+   * 
+   * @param petId Pet id to delete (required)
+   * @param apiKey  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void deletePet(Long petId, String apiKey, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'petId' is set
@@ -138,6 +169,8 @@ public class PetApi {
     if (apiKey != null)
       localVarHeaderParams.put("api_key", apiClient.parameterToString(apiKey));
 
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -168,6 +201,7 @@ public class PetApi {
         null
     );
   }
+
   /**
    * Finds Pets by status
    * Multiple status values can be provided with comma separated strings
@@ -176,6 +210,19 @@ public class PetApi {
    * @throws ApiException if fails to make API call
    */
   public List<Pet> findPetsByStatus(List<String> status) throws ApiException {
+    return this.findPetsByStatus(status, Collections.emptyMap());
+  }
+
+
+  /**
+   * Finds Pets by status
+   * Multiple status values can be provided with comma separated strings
+   * @param status Status values that need to be considered for filter (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return List&lt;Pet&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public List<Pet> findPetsByStatus(List<String> status, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'status' is set
@@ -196,6 +243,8 @@ public class PetApi {
 
     localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "status", status));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -227,6 +276,7 @@ public class PetApi {
         localVarReturnType
     );
   }
+
   /**
    * Finds Pets by tags
    * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
@@ -237,6 +287,21 @@ public class PetApi {
    */
   @Deprecated
   public Set<Pet> findPetsByTags(Set<String> tags) throws ApiException {
+    return this.findPetsByTags(tags, Collections.emptyMap());
+  }
+
+
+  /**
+   * Finds Pets by tags
+   * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+   * @param tags Tags to filter by (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return Set&lt;Pet&gt;
+   * @throws ApiException if fails to make API call
+   * @deprecated
+   */
+  @Deprecated
+  public Set<Pet> findPetsByTags(Set<String> tags, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'tags' is set
@@ -257,6 +322,8 @@ public class PetApi {
 
     localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "tags", tags));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -288,6 +355,7 @@ public class PetApi {
         localVarReturnType
     );
   }
+
   /**
    * Find pet by ID
    * Returns a single pet
@@ -296,6 +364,19 @@ public class PetApi {
    * @throws ApiException if fails to make API call
    */
   public Pet getPetById(Long petId) throws ApiException {
+    return this.getPetById(petId, Collections.emptyMap());
+  }
+
+
+  /**
+   * Find pet by ID
+   * Returns a single pet
+   * @param petId ID of pet to return (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return Pet
+   * @throws ApiException if fails to make API call
+   */
+  public Pet getPetById(Long petId, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'petId' is set
@@ -316,6 +397,8 @@ public class PetApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -347,6 +430,7 @@ public class PetApi {
         localVarReturnType
     );
   }
+
   /**
    * Update an existing pet
    * 
@@ -354,6 +438,18 @@ public class PetApi {
    * @throws ApiException if fails to make API call
    */
   public void updatePet(Pet pet) throws ApiException {
+    this.updatePet(pet, Collections.emptyMap());
+  }
+
+
+  /**
+   * Update an existing pet
+   * 
+   * @param pet Pet object that needs to be added to the store (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void updatePet(Pet pet, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = pet;
     
     // verify the required parameter 'pet' is set
@@ -373,6 +469,8 @@ public class PetApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -403,6 +501,7 @@ public class PetApi {
         null
     );
   }
+
   /**
    * Updates a pet in the store with form data
    * 
@@ -412,6 +511,20 @@ public class PetApi {
    * @throws ApiException if fails to make API call
    */
   public void updatePetWithForm(Long petId, String name, String status) throws ApiException {
+    this.updatePetWithForm(petId, name, status, Collections.emptyMap());
+  }
+
+
+  /**
+   * Updates a pet in the store with form data
+   * 
+   * @param petId ID of pet that needs to be updated (required)
+   * @param name Updated name of the pet (optional)
+   * @param status Updated status of the pet (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void updatePetWithForm(Long petId, String name, String status, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'petId' is set
@@ -432,6 +545,8 @@ public class PetApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     if (name != null)
       localVarFormParams.put("name", name);
@@ -466,6 +581,7 @@ if (status != null)
         null
     );
   }
+
   /**
    * uploads an image
    * 
@@ -476,6 +592,21 @@ if (status != null)
    * @throws ApiException if fails to make API call
    */
   public ModelApiResponse uploadFile(Long petId, String additionalMetadata, File _file) throws ApiException {
+    return this.uploadFile(petId, additionalMetadata, _file, Collections.emptyMap());
+  }
+
+
+  /**
+   * uploads an image
+   * 
+   * @param petId ID of pet to update (required)
+   * @param additionalMetadata Additional data to pass to server (optional)
+   * @param _file file to upload (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return ModelApiResponse
+   * @throws ApiException if fails to make API call
+   */
+  public ModelApiResponse uploadFile(Long petId, String additionalMetadata, File _file, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'petId' is set
@@ -496,6 +627,8 @@ if (status != null)
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     if (additionalMetadata != null)
       localVarFormParams.put("additionalMetadata", additionalMetadata);
@@ -531,6 +664,7 @@ if (_file != null)
         localVarReturnType
     );
   }
+
   /**
    * uploads an image (required)
    * 
@@ -541,6 +675,21 @@ if (_file != null)
    * @throws ApiException if fails to make API call
    */
   public ModelApiResponse uploadFileWithRequiredFile(Long petId, File requiredFile, String additionalMetadata) throws ApiException {
+    return this.uploadFileWithRequiredFile(petId, requiredFile, additionalMetadata, Collections.emptyMap());
+  }
+
+
+  /**
+   * uploads an image (required)
+   * 
+   * @param petId ID of pet to update (required)
+   * @param requiredFile file to upload (required)
+   * @param additionalMetadata Additional data to pass to server (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return ModelApiResponse
+   * @throws ApiException if fails to make API call
+   */
+  public ModelApiResponse uploadFileWithRequiredFile(Long petId, File requiredFile, String additionalMetadata, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'petId' is set
@@ -566,6 +715,8 @@ if (_file != null)
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     if (additionalMetadata != null)
       localVarFormParams.put("additionalMetadata", additionalMetadata);
@@ -601,4 +752,5 @@ if (requiredFile != null)
         localVarReturnType
     );
   }
+
 }

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/StoreApi.java

@@ -24,6 +24,7 @@ import org.openapitools.client.model.Order;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -31,6 +32,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class StoreApi {
+
+
   private ApiClient apiClient;
 
   public StoreApi() {
@@ -56,6 +59,18 @@ public class StoreApi {
    * @throws ApiException if fails to make API call
    */
   public void deleteOrder(String orderId) throws ApiException {
+    this.deleteOrder(orderId, Collections.emptyMap());
+  }
+
+
+  /**
+   * Delete purchase order by ID
+   * For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors
+   * @param orderId ID of the order that needs to be deleted (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void deleteOrder(String orderId, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'orderId' is set
@@ -76,6 +91,8 @@ public class StoreApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -106,6 +123,7 @@ public class StoreApi {
         null
     );
   }
+
   /**
    * Returns pet inventories by status
    * Returns a map of status codes to quantities
@@ -113,6 +131,18 @@ public class StoreApi {
    * @throws ApiException if fails to make API call
    */
   public Map<String, Integer> getInventory() throws ApiException {
+    return this.getInventory(Collections.emptyMap());
+  }
+
+
+  /**
+   * Returns pet inventories by status
+   * Returns a map of status codes to quantities
+   * @param additionalHeaders additionalHeaders for this call
+   * @return Map&lt;String, Integer&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public Map<String, Integer> getInventory(Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -127,6 +157,8 @@ public class StoreApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -158,6 +190,7 @@ public class StoreApi {
         localVarReturnType
     );
   }
+
   /**
    * Find purchase order by ID
    * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generate exceptions
@@ -166,6 +199,19 @@ public class StoreApi {
    * @throws ApiException if fails to make API call
    */
   public Order getOrderById(Long orderId) throws ApiException {
+    return this.getOrderById(orderId, Collections.emptyMap());
+  }
+
+
+  /**
+   * Find purchase order by ID
+   * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generate exceptions
+   * @param orderId ID of pet that needs to be fetched (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return Order
+   * @throws ApiException if fails to make API call
+   */
+  public Order getOrderById(Long orderId, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'orderId' is set
@@ -186,6 +232,8 @@ public class StoreApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -217,6 +265,7 @@ public class StoreApi {
         localVarReturnType
     );
   }
+
   /**
    * Place an order for a pet
    * 
@@ -225,6 +274,19 @@ public class StoreApi {
    * @throws ApiException if fails to make API call
    */
   public Order placeOrder(Order order) throws ApiException {
+    return this.placeOrder(order, Collections.emptyMap());
+  }
+
+
+  /**
+   * Place an order for a pet
+   * 
+   * @param order order placed for purchasing the pet (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return Order
+   * @throws ApiException if fails to make API call
+   */
+  public Order placeOrder(Order order, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = order;
     
     // verify the required parameter 'order' is set
@@ -244,6 +306,8 @@ public class StoreApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -275,4 +339,5 @@ public class StoreApi {
         localVarReturnType
     );
   }
+
 }

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/UserApi.java

@@ -25,6 +25,7 @@ import org.openapitools.client.model.User;
 
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -32,6 +33,8 @@ import java.util.StringJoiner;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class UserApi {
+
+
   private ApiClient apiClient;
 
   public UserApi() {
@@ -57,6 +60,18 @@ public class UserApi {
    * @throws ApiException if fails to make API call
    */
   public void createUser(User user) throws ApiException {
+    this.createUser(user, Collections.emptyMap());
+  }
+
+
+  /**
+   * Create user
+   * This can only be done by the logged in user.
+   * @param user Created user object (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void createUser(User user, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = user;
     
     // verify the required parameter 'user' is set
@@ -76,6 +91,8 @@ public class UserApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -106,6 +123,7 @@ public class UserApi {
         null
     );
   }
+
   /**
    * Creates list of users with given input array
    * 
@@ -113,6 +131,18 @@ public class UserApi {
    * @throws ApiException if fails to make API call
    */
   public void createUsersWithArrayInput(List<User> user) throws ApiException {
+    this.createUsersWithArrayInput(user, Collections.emptyMap());
+  }
+
+
+  /**
+   * Creates list of users with given input array
+   * 
+   * @param user List of user object (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void createUsersWithArrayInput(List<User> user, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = user;
     
     // verify the required parameter 'user' is set
@@ -132,6 +162,8 @@ public class UserApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -162,6 +194,7 @@ public class UserApi {
         null
     );
   }
+
   /**
    * Creates list of users with given input array
    * 
@@ -169,6 +202,18 @@ public class UserApi {
    * @throws ApiException if fails to make API call
    */
   public void createUsersWithListInput(List<User> user) throws ApiException {
+    this.createUsersWithListInput(user, Collections.emptyMap());
+  }
+
+
+  /**
+   * Creates list of users with given input array
+   * 
+   * @param user List of user object (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void createUsersWithListInput(List<User> user, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = user;
     
     // verify the required parameter 'user' is set
@@ -188,6 +233,8 @@ public class UserApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -218,6 +265,7 @@ public class UserApi {
         null
     );
   }
+
   /**
    * Delete user
    * This can only be done by the logged in user.
@@ -225,6 +273,18 @@ public class UserApi {
    * @throws ApiException if fails to make API call
    */
   public void deleteUser(String username) throws ApiException {
+    this.deleteUser(username, Collections.emptyMap());
+  }
+
+
+  /**
+   * Delete user
+   * This can only be done by the logged in user.
+   * @param username The name that needs to be deleted (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void deleteUser(String username, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'username' is set
@@ -245,6 +305,8 @@ public class UserApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -275,6 +337,7 @@ public class UserApi {
         null
     );
   }
+
   /**
    * Get user by user name
    * 
@@ -283,6 +346,19 @@ public class UserApi {
    * @throws ApiException if fails to make API call
    */
   public User getUserByName(String username) throws ApiException {
+    return this.getUserByName(username, Collections.emptyMap());
+  }
+
+
+  /**
+   * Get user by user name
+   * 
+   * @param username The name that needs to be fetched. Use user1 for testing. (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return User
+   * @throws ApiException if fails to make API call
+   */
+  public User getUserByName(String username, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'username' is set
@@ -303,6 +379,8 @@ public class UserApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -334,6 +412,7 @@ public class UserApi {
         localVarReturnType
     );
   }
+
   /**
    * Logs user into the system
    * 
@@ -343,6 +422,20 @@ public class UserApi {
    * @throws ApiException if fails to make API call
    */
   public String loginUser(String username, String password) throws ApiException {
+    return this.loginUser(username, password, Collections.emptyMap());
+  }
+
+
+  /**
+   * Logs user into the system
+   * 
+   * @param username The user name for login (required)
+   * @param password The password for login in clear text (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String loginUser(String username, String password, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // verify the required parameter 'username' is set
@@ -369,6 +462,8 @@ public class UserApi {
     localVarQueryParams.addAll(apiClient.parameterToPair("username", username));
     localVarQueryParams.addAll(apiClient.parameterToPair("password", password));
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -400,12 +495,24 @@ public class UserApi {
         localVarReturnType
     );
   }
+
   /**
    * Logs out current logged in user session
    * 
    * @throws ApiException if fails to make API call
    */
   public void logoutUser() throws ApiException {
+    this.logoutUser(Collections.emptyMap());
+  }
+
+
+  /**
+   * Logs out current logged in user session
+   * 
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void logoutUser(Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = null;
     
     // create path and map variables
@@ -420,6 +527,8 @@ public class UserApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -450,6 +559,7 @@ public class UserApi {
         null
     );
   }
+
   /**
    * Updated user
    * This can only be done by the logged in user.
@@ -458,6 +568,19 @@ public class UserApi {
    * @throws ApiException if fails to make API call
    */
   public void updateUser(String username, User user) throws ApiException {
+    this.updateUser(username, user, Collections.emptyMap());
+  }
+
+
+  /**
+   * Updated user
+   * This can only be done by the logged in user.
+   * @param username name that need to be deleted (required)
+   * @param user Updated user object (required)
+   * @param additionalHeaders additionalHeaders for this call
+   * @throws ApiException if fails to make API call
+   */
+  public void updateUser(String username, User user, Map<String, String> additionalHeaders) throws ApiException {
     Object localVarPostBody = user;
     
     // verify the required parameter 'username' is set
@@ -483,6 +606,8 @@ public class UserApi {
     Map<String, Object> localVarFormParams = new HashMap<String, Object>();
 
     
+    localVarHeaderParams.putAll(additionalHeaders);
+
     
     
     final String[] localVarAccepts = {
@@ -513,4 +638,5 @@ public class UserApi {
         null
     );
   }
+
 }