add override to java native pojo (#15125)

modules/openapi-generator/src/main/resources/Java/libraries/native/pojo.mustache

@@ -267,6 +267,23 @@ public class {{classname}} {{#parent}}extends {{{.}}} {{/parent}}{{#vendorExtens
 
   {{/vars}}
 {{>libraries/native/additional_properties}}
+  {{#parent}}
+  {{#allVars}}
+  {{#isOverridden}}
+  @Override
+  public {{classname}} {{name}}({{{datatypeWithEnum}}} {{name}}) {
+    {{#vendorExtensions.x-is-jackson-optional-nullable}}
+    this.{{setter}}(JsonNullable.<{{{datatypeWithEnum}}}>of({{name}}));
+    {{/vendorExtensions.x-is-jackson-optional-nullable}}
+    {{^vendorExtensions.x-is-jackson-optional-nullable}}
+    this.{{setter}}({{name}});
+    {{/vendorExtensions.x-is-jackson-optional-nullable}}
+    return this;
+  }
+
+  {{/isOverridden}}
+  {{/allVars}}
+  {{/parent}}
   /**
    * Return true if this {{name}} object is equal to o.
    */

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/JavaClientCodegenTest.java

@@ -1954,4 +1954,32 @@ public class JavaClientCodegenTest {
                 "  public Pet petType(String petType) {\n");
 
     }
-}
+
+    @Test
+    public void testForJavaNativeClientOverrideSetter() throws IOException {
+        File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
+        output.deleteOnExit();
+        String outputPath = output.getAbsolutePath().replace('\\', '/');
+        OpenAPI openAPI = new OpenAPIParser()
+                .readLocation("src/test/resources/3_0/allOf_composition_discriminator.yaml", null, new ParseOptions()).getOpenAPI();
+
+        JavaClientCodegen codegen = new JavaClientCodegen();
+        codegen.setOutputDir(output.getAbsolutePath());
+
+        ClientOptInput input = new ClientOptInput();
+        input.openAPI(openAPI);
+        input.config(codegen);
+
+        DefaultGenerator generator = new DefaultGenerator();
+        codegen.setLibrary(JavaClientCodegen.NATIVE);
+
+        generator.opts(input).generate();
+
+        assertFileContains(Paths.get(outputPath + "/src/main/java/org/openapitools/client/model/Cat.java"), "  @Override\n" +
+                "  public Cat petType(String petType) {");
+        assertFileContains(Paths.get(outputPath + "/src/main/java/org/openapitools/client/model/Pet.java"), "  }\n" +
+                "\n" +
+                "  public Pet petType(String petType) {\n");
+
+    }
+}

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

@@ -78,6 +78,18 @@ public class Cat extends Animal {
   }
 
 
+  @Override
+  public Cat className(String className) {
+    this.setClassName(className);
+    return this;
+  }
+
+  @Override
+  public Cat color(String color) {
+    this.setColor(color);
+    return this;
+  }
+
   /**
    * Return true if this Cat object is equal to o.
    */

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

@@ -78,6 +78,18 @@ public class Dog extends Animal {
   }
 
 
+  @Override
+  public Dog className(String className) {
+    this.setClassName(className);
+    return this;
+  }
+
+  @Override
+  public Dog color(String color) {
+    this.setColor(color);
+    return this;
+  }
+
   /**
    * Return true if this Dog object is equal to o.
    */

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

@@ -52,6 +52,12 @@ public class ParentPet extends GrandparentAnimal {
   public ParentPet() { 
   }
 
+  @Override
+  public ParentPet petType(String petType) {
+    this.setPetType(petType);
+    return this;
+  }
+
   /**
    * Return true if this ParentPet object is equal to o.
    */

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

@@ -78,6 +78,18 @@ public class Cat extends Animal {
   }
 
 
+  @Override
+  public Cat className(String className) {
+    this.setClassName(className);
+    return this;
+  }
+
+  @Override
+  public Cat color(String color) {
+    this.setColor(color);
+    return this;
+  }
+
   /**
    * Return true if this Cat object is equal to o.
    */

samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/Dog.java

@@ -78,6 +78,18 @@ public class Dog extends Animal {
   }
 
 
+  @Override
+  public Dog className(String className) {
+    this.setClassName(className);
+    return this;
+  }
+
+  @Override
+  public Dog color(String color) {
+    this.setColor(color);
+    return this;
+  }
+
   /**
    * Return true if this Dog object is equal to o.
    */

samples/client/petstore/java/native/src/main/java/org/openapitools/client/model/ParentPet.java

@@ -52,6 +52,12 @@ public class ParentPet extends GrandparentAnimal {
   public ParentPet() { 
   }
 
+  @Override
+  public ParentPet petType(String petType) {
+    this.setPetType(petType);
+    return this;
+  }
+
   /**
    * Return true if this ParentPet object is equal to o.
    */