[JavaScript] add oneOf support (#13561)

* JS add oneOf support

* add validate json method

* add oneOf support to JS client

* update samples

* add todo in anyof

* switch to composed.oneOf

* update oneOf to support primitive types

* update messages

* minor fix, add more tests

* update samples

* fix npe in from model

* fix syntax error in length check

* update samples

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavascriptClientCodegen.java

@@ -852,9 +852,11 @@ public class JavascriptClientCodegen extends DefaultCodegen implements CodegenCo
 
         if (allDefinitions != null && codegenModel != null && codegenModel.parent != null && codegenModel.hasEnums) {
             final Schema parentModel = allDefinitions.get(codegenModel.parentSchema);
+            if (parentModel != null) {
                 final CodegenModel parentCodegenModel = super.fromModel(codegenModel.parent, parentModel);
                 codegenModel = JavascriptClientCodegen.reconcileInlineEnums(codegenModel, parentCodegenModel);
             }
+        }
         if (ModelUtils.isArraySchema(model)) {
             ArraySchema am = (ArraySchema) model;
             if (codegenModel != null && am.getItems() != null) {

modules/openapi-generator/src/main/resources/Javascript/model.mustache

@@ -1,4 +1,28 @@
 {{>licenseInfo}}
 import ApiClient from '../ApiClient';
 {{#imports}}import {{import}} from './{{import}}';
-{{/imports}}{{#models}}{{#model}}{{#isEnum}}{{>partial_model_enum_class}}{{/isEnum}}{{^isEnum}}{{>partial_model_generic}}{{/isEnum}}{{/model}}{{/models}}
+{{/imports}}
+{{#models}}
+{{#model}}
+{{#isEnum}}
+{{>partial_model_enum_class}}
+{{/isEnum}}
+{{^isEnum}}
+{{#oneOf}}
+{{#-first}}
+{{>partial_model_oneof}}
+{{/-first}}
+{{/oneOf}}
+{{^oneOf}}
+{{#anyOf}}
+{{#-first}}
+// TODO: add anyof model support
+{{/-first}}
+{{/anyOf}}
+{{^anyOf}}
+{{>partial_model_generic}}
+{{/anyOf}}
+{{/oneOf}}
+{{/isEnum}}
+{{/model}}
+{{/models}}

modules/openapi-generator/src/main/resources/Javascript/partial_model_generic.mustache

@@ -54,6 +54,80 @@ class {{classname}} {{#parent}}{{^parentModel}}{{#vendorExtensions.x-is-array}}e
         return obj;
     }
 
+    {{#emitJSDoc}}/**
+     * Validates the JSON data with respect to <code>{{classname}}</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>{{classname}}</code>.
+     */{{/emitJSDoc}}
+    static validateJSON(data) {
+        {{#requiredVars}}
+        {{#-first}}
+        // check to make sure all required properties are present in the JSON string
+        for (const property of {{classname}}.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        {{/-first}}
+        {{/requiredVars}}
+        {{#vars}}
+        {{#isArray}}
+        {{#items.isModel}}
+        {{#isRequired}}
+        // ensure the json data is an array
+        if (!Array.isArray(data['{{{baseName}}}'])) {
+            throw new Error("Expected the field `{{{baseName}}}` to be an array in the JSON data but got " + data['{{{baseName}}}']);
+        }
+        // validate the required field `{{{baseName}}}` (array)
+        for (const item of data['{{{baseName}}}']) {
+            {{{items.dataType}}}.validateJsonObject(item);
+        };
+        {{/isRequired}}
+        {{^isRequired}}
+        if (data['{{{baseName}}}']) { // data not null
+            // ensure the json data is an array
+            if (!Array.isArray(data['{{{baseName}}}'])) {
+                throw new Error("Expected the field `{{{baseName}}}` to be an array in the JSON data but got " + data['{{{baseName}}}']);
+            }
+            // validate the optional field `{{{baseName}}}` (array)
+            for (const item of data['{{{baseName}}}']) {
+                {{{items.dataType}}}.validateJsonObject(item);
+            };
+        }
+        {{/isRequired}}
+        {{/items.isModel}}
+        {{^items.isModel}}
+        // ensure the json data is an array
+        if (!Array.isArray(data['{{{baseName}}}'])) {
+            throw new Error("Expected the field `{{{baseName}}}` to be an array in the JSON data but got " + data['{{{baseName}}}']);
+        }
+        {{/items.isModel}}
+        {{/isArray}}
+        {{^isContainer}}
+        {{#isString}}
+        // ensure the json data is a string
+        if ({{^isRequired}}data['{{{baseName}}}']{{/isRequired}} && !(typeof data['{{{baseName}}}'] === 'string' || data['{{{baseName}}}'] instanceof String)) {
+            throw new Error("Expected the field `{{{baseName}}}` to be a primitive type in the JSON string but got " + data['{{{baseName}}}']);
+        }
+        {{/isString}}
+        {{#isModel}}
+        {{#isRequired}}
+        // validate the required field `{{{baseName}}}`
+        {{{dataType}}}.validateJSON(data['{{{baseName}}}']);
+        {{/isRequired}}
+        {{^isRequired}}
+        // validate the optional field `{{{baseName}}}`
+        if (data['{{{baseName}}}']) { // data not null
+          {{{dataType}}}.validateJSON(data['{{{baseName}}}']);
+        }
+        {{/isRequired}}
+        {{/isModel}}
+        {{/isContainer}}
+        {{/vars}}
+
+        return true;
+    }
+
 {{#emitModelMethods}}{{#vars}}{{#emitJSDoc}}/**{{#description}}
      * Returns {{{.}}}{{/description}}{{#minimum}}
      * minimum: {{.}}{{/minimum}}{{#maximum}}
@@ -74,6 +148,8 @@ class {{classname}} {{#parent}}{{^parentModel}}{{#vendorExtensions.x-is-array}}e
 {{/vars}}{{/emitModelMethods}}{{/model}}
 }
 
+{{#requiredVars}}{{#-first}}{{classname}}.RequiredProperties = [{{/-first}}"{{{baseName}}}"{{^-last}}, {{/-last}}{{#-last}}];{{/-last}}{{/requiredVars}}
+
 {{#vars}}{{#emitJSDoc}}/**{{#description}}
  * {{{.}}}{{/description}}
  * @member {{=< >=}}{<&vendorExtensions.x-jsdoc-type>}<={{ }}=> {{baseName}}{{#defaultValue}}

modules/openapi-generator/src/main/resources/Javascript/partial_model_oneof.mustache

@@ -0,0 +1,265 @@
+
+{{#emitJSDoc}}
+/**
+ * The {{classname}} model module.
+ * @module {{#invokerPackage}}{{.}}/{{/invokerPackage}}{{#modelPackage}}{{.}}/{{/modelPackage}}{{classname}}
+ * @version {{projectVersion}}
+ */
+{{/emitJSDoc}}
+class {{classname}} {
+    {{#emitJSDoc}}/**
+     * Constructs a new <code>{{classname}}</code>.{{#description}}
+     * {{.}}{{/description}}
+     * @alias module:{{#invokerPackage}}{{.}}/{{/invokerPackage}}{{#modelPackage}}{{.}}/{{/modelPackage}}{{classname}}
+     * @param {{=< >=}}{(<#oneOf>module:<#invokerPackage><invokerPackage>/</invokerPackage><#modelPackage><modelPackage>/</modelPackage><&.><^-last>|</-last></oneOf>)}<={{ }}=> The actual instance to initialize {{classname}}.
+     */
+    {{/emitJSDoc}}
+    constructor(obj = null) {
+        this.actualInstance = obj;
+    }
+
+    {{#emitJSDoc}}
+    /**
+     * Constructs a <code>{{classname}}</code> from a plain JavaScript object, optionally creating a new instance.
+     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @param {{=< >=}}{module:<#invokerPackage><invokerPackage>/</invokerPackage><#modelPackage><modelPackage>/</modelPackage><classname>}<={{ }}=> obj Optional instance to populate.
+     * @return {{=< >=}}{module:<#invokerPackage><invokerPackage>/</invokerPackage><#modelPackage><modelPackage>/</modelPackage><classname>}<={{ }}=> The populated <code>{{classname}}</code> instance.
+     */
+    {{/emitJSDoc}}
+    static constructFromObject(data, obj) {
+        if (!data) {
+            return new {{classname}}();
+        }
+        var match = 0;
+        var errorMessages = [];
+        {{#composedSchemas.oneOf}}
+        {{#description}}
+        // {{{description}}}
+        {{/description}}
+        try {
+            {{#isPrimitiveType}}
+            {{#isArray}}
+            // validate array data type
+            if (!Array.isArray(data)) {
+                throw new Error("Invalid data type. Expecting array. Data: " + data);
+            }
+            {{#minItems}}
+            {{#maxItems}}
+            if (data.length > {{{maxItems}}} || data.length < {{{minItems}}}) {
+                throw new Error("Invalid array size. Minimim: {{minItems}}. Maximum: {{maxItems}}. Data: " + data);
+            }
+            {{/maxItems}}
+            {{^maxItems}}
+            if (data.length < {{{minItems}}}) {
+                throw new Error("Invalid array size. Minimim: {{minItems}}. Data: " + data);
+            }
+            {{/maxItems}}
+            {{/minItems}}
+            {{^minItems}}
+            {{#maxItems}}
+            if (data.length > {{{maxItems}}}) {
+                throw new Error("Invalid array size. Maximum: {{maxItems}}. Data: " + data);
+            }
+            {{/maxItems}}
+            {{/minItems}}
+            {{#items.isInteger}}
+            // validate array of integer
+            for (const item of data) {
+                if (!(typeof item === 'number' && item % 1 === 0)) {
+                    throw new Error("Invalid array items. Must be integer. Data: " + data);
+                }
+                {{#items.maximum}}
+                {{#items.minimum}}
+                if (item > {{items.maximum}} || item < {{items.minimum}}) {
+                    throw new Error("Invalid integer value in an array items. Max.: {{items.maximum}}. Min.: {{items.minimum}}. Data: " + data);
+                }
+                {{/items.minimum}}
+                {{^items.minimum}}
+                if (item > {{items.maximum}}) {
+                    throw new Error("Invalid integer value in an array items. Max.: {{items.maximum}}. Data: " + data);
+                }
+                {{/items.minimum}}
+                {{/items.maximum}}
+                {{^items.maximum}}
+                {{#items.minimum}}
+                if (item < {{items.minimum}}) {
+                    throw new Error("Invalid integer value in an array items. Min.: {{items.minimum}}. Data: " + data);
+                }
+                {{/items.minimum}}
+                {{/items.maximum}}
+            }
+            {{/items.isInteger}}
+            {{#items.isString}}
+            // validate array of string
+            for (const item of data) {
+                if (!(typeof item === 'number' && item % 1 === 0)) {
+                    throw new Error("Invalid array items. Must be string. Data: " + data);
+                }
+                {{#items.pattern}}
+                if (!{{{items.pattern}}}.test(item)) {
+                    throw new Error("Invalid string value in an array items. Must conform to {{{items.pattern}}}. Data: " + item);
+                }
+                {{/items.pattern}}
+                {{#items.minLength}}
+                {{#items.maxLength}}
+                if (item.length > {{items.maxLength}} && item.length < {{items.minLength}}) {
+                    throw new Error("Invalid string value in an array items. Max. length: {{{items.maxLength}}}. Min. length: {{{items.minLength}}}. Data: " + item);
+                }
+                {{/items.maxLength}}
+                {{^items.maxLength}}
+                if (item.length < {{items.minLength}}) {
+                    throw new Error("Invalid string value in an array items. Min. length: {{{items.minLength}}}. Data: " + item);
+                }
+                {{/items.maxLength}}
+                {{/items.minLength}}
+                {{^items.minLength}}
+                {{#items.maxLength}}
+                if (item.length > {{items.maxLength}}) {
+                    throw new Error("Invalid string value in an array items. Max. length: {{{items.maxLength}}}. Data: " + item)
+                }
+                {{/items.maxLength}}
+                {{/items.minLength}}
+            }
+            {{/items.isString}}
+            {{#items.isNumber}}
+            // validate array of string
+            for (const item of data) {
+                if (!(typeof data === 'number' && data % 1 != 0)) {
+                    throw new Error("Invalid array items. Must be number. Data: " + JSON.stringify(data));
+                }
+            }
+            {{/items.isNumber}}
+            {{/isArray}}
+            {{^isArray}}
+            {{#isInteger}}
+            // validate array of integer
+            if (!(typeof data === 'number' && data % 1 === 0)) {
+                throw new Error("Invalid array items. Must be integer. Data: " + JSON.stringify(data));
+            }
+            {{#maximum}}
+            {{#minimum}}
+            if (data > {{maximum}} || data < {{minimum}}) {
+                throw new Error("Invalid integer value in an array items. Max.: {{maximum}}. Min.: {{minimum}}. Data: " + JSON.stringify(data));
+            }
+            {{/minimum}}
+            {{^minimum}}
+            if (data > {{maximum}}) {
+                throw new Error("Invalid integer value in an array items. Max.: {{maximum}}. Data: " + JSON.stringify(data));
+            }
+            {{/minimum}}
+            {{/maximum}}
+            {{^maximum}}
+            {{#minimum}}
+            if (data < {{minimum}}) {
+                throw new Error("Invalid integer value in an array items. Min.: {{minimum}}. Data: " + JSON.stringify(data));
+            }
+            {{/minimum}}
+            {{/maximum}}
+            {{/isInteger}}
+            {{#isString}}
+            // validate array of string
+            if (!(typeof data === 'string')) {
+                throw new Error("Invalid data. Must be string. Data: " + JSON.stringify(data));
+            }
+            {{#pattern}}
+            if (!{{{pattern}}}.test(data)) {
+                throw new Error("Invalid string value in an array items. Must conform to {{{.}}}. Data: " + JSON.stringify(data));
+            }
+            {{/pattern}}
+            {{#minLength}}
+            {{#maxLength}}
+            if (data.length > {{maxLength}} && data.length < {{minLength}}) {
+                throw new Error("Invalid string value in an array items. Max. length: {{{maxLength}}}. Min. length: {{{minLength}}}. Data: " + JSON.stringify(data));
+            }
+            {{/maxLength}}
+            {{^maxLength}}
+            if (data.length < {{minLength}}) {
+                throw new Error("Invalid string value in an array items. Min. length: {{{minLength}}}. Data: " + data);
+            }
+            {{/maxLength}}
+            {{/minLength}}
+            {{^minLength}}
+            {{#maxLength}}
+            if (data.length > {{maxLength}}) {
+                throw new Error("Invalid string value in an array items. Max. length: {{{maxLength}}}. Data: " + JSON.stringify(data));
+            }
+            {{/maxLength}}
+            {{/minLength}}
+            {{/isString}}
+            {{#isNumber}}
+            // validate array of string
+            if (!(typeof data === 'number' && data % 1 != 0)) {
+                throw new Error("Invalid array items. Must be number. Data: " + JSON.stringify(data));
+            }
+            {{/isNumber}}
+            {{/isArray}}
+            obj = new {{classname}}(data);
+            {{/isPrimitiveType}}
+            {{^isPrimitiveType}}
+            // validate the JSON data
+            {{{dataType}}}.validateJSON(data);
+            // create {{{dataType}}} from JSON data
+            obj = new {{classname}}({{{dataType}}}.constructFromObject(data));
+            {{/isPrimitiveType}}
+            match++;
+        } catch(err) {
+            // json data failed to deserialize into {{{dataType}}}
+            errorMessages.push("Failed to construct {{{dataType}}}: " + err)
+        }
+
+        {{/composedSchemas.oneOf}}
+        if (match > 1) {
+            throw new Error("Multiple matches found constructing `{{{classname}}}` with oneOf schemas {{#oneOf}}{{{.}}}{{^-last}}, {{/-last}}{{/oneOf}}. JSON data: " + JSON.stringify(data));
+        } else if (match === 0) {
+            throw new Error("No match found constructing `{{{classname}}}` with oneOf schemas {{#oneOf}}{{{.}}}{{^-last}}, {{/-last}}{{/oneOf}}. Details: " +
+                            errorMessages.join(", "));
+        } else { // only 1 match
+            return obj;
+        }
+    }
+
+    {{#emitJSDoc}}
+    /**
+     * Gets the actaul instance, which can be {{#oneOf}}<code>{{{.}}}</code>{{^-last}}, {{/-last}}{{/oneOf}}.
+     * @return {{=< >=}}{(<#oneOf>module:<#invokerPackage><invokerPackage>/</invokerPackage><#modelPackage><modelPackage>/</modelPackage><&.><^-last>|</-last></oneOf>)}<={{ }}=> The actual instance.
+     */
+    {{/emitJSDoc}}
+    getActualInstance() {
+        return this.actualInstance;
+    }
+
+    {{#emitJSDoc}}
+    /**
+     * Sets the actaul instance, which can be {{#oneOf}}<code>{{{.}}}</code>{{^-last}}, {{/-last}}{{/oneOf}}.
+     * @param {{=< >=}}{(<#oneOf>module:<#invokerPackage><invokerPackage>/</invokerPackage><#modelPackage><modelPackage>/</modelPackage><&.><^-last>|</-last></oneOf>)}<={{ }}=> obj The actual instance.
+     */
+    {{/emitJSDoc}}
+    setActualInstance(obj) {
+       this.actualInstance = {{classname}}.constructFromObject(obj).getActualInstance();
+    }
+
+    {{#emitJSDoc}}
+    /**
+     * Returns the JSON representation of the actual intance.
+     * @return {string}
+     */
+    {{/emitJSDoc}}
+    toJSON = function(){
+        return this.getActualInstance();
+    }
+
+}
+
+{{#vars}}{{#emitJSDoc}}/**{{#description}}
+ * {{{.}}}{{/description}}
+ * @member {{=< >=}}{<&vendorExtensions.x-jsdoc-type>}<={{ }}=> {{baseName}}{{#defaultValue}}
+ * @default {{{.}}}{{/defaultValue}}
+ */{{/emitJSDoc}}
+{{classname}}.prototype['{{baseName}}'] = {{{defaultValue}}}{{^defaultValue}}undefined{{/defaultValue}};
+
+{{/vars}}
+
+{{classname}}.OneOf = [{{#oneOf}}"{{{.}}}"{{^-last}}, {{/-last}}{{/oneOf}}];
+
+export default {{classname}};

modules/openapi-generator/src/test/resources/3_0/javascript/petstore-with-fake-endpoints-models-for-testing.yaml

@@ -1908,3 +1908,72 @@ components:
           deprecated: true
           items:
             $ref: '#/components/schemas/Bar'
+    Pig:
+      nullable: true
+      oneOf:
+        - $ref: '#/components/schemas/BasquePig'
+        - $ref: '#/components/schemas/DanishPig'
+    BasquePig:
+      type: object
+      properties:
+        className:
+          type: string
+        color:
+          type: string
+      required:
+        - className
+        - color
+    DanishPig:
+      type: object
+      properties:
+        className:
+          type: string
+        size:
+          type: integer
+      required:
+        - className
+        - size
+    NestedOneOf:
+      type: object
+      properties:
+        size:
+          type: integer
+        nested_pig:
+          $ref: '#/components/schemas/Pig'
+    NestedColor:
+      type: object
+      properties:
+        size:
+          type: integer
+        nested:
+          $ref: '#/components/schemas/Color'
+    RgbColor:
+      description: RGB three element array with values 0-255.
+      type: array
+      items:
+        type: integer
+        minimum: 0
+        maximum: 255
+      minItems: 3
+      maxItems: 3
+    RgbaColor:
+      description: RGBA four element array with values 0-255.
+      type: array
+      items:
+        type: integer
+        minimum: 0
+        maximum: 255
+      minItems: 4
+      maxItems: 4
+    HexColor:
+      description: 'Hex color string, such as #00FF00.'
+      type: string
+      pattern: ^#(?:[0-9a-fA-F]{3}){1,2}$
+      minLength: 7
+      maxLength: 7
+    Color:
+      description: RGB array, RGBA array, or hex string.
+      oneOf:
+      - $ref: '#/components/schemas/RgbColor'
+      - $ref: '#/components/schemas/RgbaColor'
+      - $ref: '#/components/schemas/HexColor'

samples/client/petstore/javascript-apollo/.openapi-generator/FILES

@@ -9,12 +9,15 @@ docs/ApiResponse.md
 docs/ArrayOfArrayOfNumberOnly.md
 docs/ArrayOfNumberOnly.md
 docs/ArrayTest.md
+docs/BasquePig.md
 docs/Capitalization.md
 docs/Cat.md
 docs/CatAllOf.md
 docs/Category.md
 docs/ClassModel.md
 docs/Client.md
+docs/Color.md
+docs/DanishPig.md
 docs/DefaultApi.md
 docs/DeprecatedObject.md
 docs/Dog.md
@@ -36,6 +39,8 @@ docs/MapTest.md
 docs/MixedPropertiesAndAdditionalPropertiesClass.md
 docs/Model200Response.md
 docs/Name.md
+docs/NestedColor.md
+docs/NestedOneOf.md
 docs/NullableClass.md
 docs/NumberOnly.md
 docs/ObjectWithDeprecatedFields.md
@@ -48,6 +53,7 @@ docs/OuterEnumIntegerDefaultValue.md
 docs/OuterObjectWithEnumProperty.md
 docs/Pet.md
 docs/PetApi.md
+docs/Pig.md
 docs/ReadOnlyFirst.md
 docs/Return.md
 docs/SpecialModelName.md
@@ -73,12 +79,15 @@ src/model/ApiResponse.js
 src/model/ArrayOfArrayOfNumberOnly.js
 src/model/ArrayOfNumberOnly.js
 src/model/ArrayTest.js
+src/model/BasquePig.js
 src/model/Capitalization.js
 src/model/Cat.js
 src/model/CatAllOf.js
 src/model/Category.js
 src/model/ClassModel.js
 src/model/Client.js
+src/model/Color.js
+src/model/DanishPig.js
 src/model/DeprecatedObject.js
 src/model/Dog.js
 src/model/DogAllOf.js
@@ -97,6 +106,8 @@ src/model/MapTest.js
 src/model/MixedPropertiesAndAdditionalPropertiesClass.js
 src/model/Model200Response.js
 src/model/Name.js
+src/model/NestedColor.js
+src/model/NestedOneOf.js
 src/model/NullableClass.js
 src/model/NumberOnly.js
 src/model/ObjectWithDeprecatedFields.js
@@ -108,6 +119,7 @@ src/model/OuterEnumInteger.js
 src/model/OuterEnumIntegerDefaultValue.js
 src/model/OuterObjectWithEnumProperty.js
 src/model/Pet.js
+src/model/Pig.js
 src/model/ReadOnlyFirst.js
 src/model/Return.js
 src/model/SpecialModelName.js

samples/client/petstore/javascript-apollo/README.md

@@ -171,12 +171,15 @@ Class | Method | HTTP request | Description
  - [OpenApiPetstore.ArrayOfArrayOfNumberOnly](docs/ArrayOfArrayOfNumberOnly.md)
  - [OpenApiPetstore.ArrayOfNumberOnly](docs/ArrayOfNumberOnly.md)
  - [OpenApiPetstore.ArrayTest](docs/ArrayTest.md)
+ - [OpenApiPetstore.BasquePig](docs/BasquePig.md)
  - [OpenApiPetstore.Capitalization](docs/Capitalization.md)
  - [OpenApiPetstore.Cat](docs/Cat.md)
  - [OpenApiPetstore.CatAllOf](docs/CatAllOf.md)
  - [OpenApiPetstore.Category](docs/Category.md)
  - [OpenApiPetstore.ClassModel](docs/ClassModel.md)
  - [OpenApiPetstore.Client](docs/Client.md)
+ - [OpenApiPetstore.Color](docs/Color.md)
+ - [OpenApiPetstore.DanishPig](docs/DanishPig.md)
  - [OpenApiPetstore.DeprecatedObject](docs/DeprecatedObject.md)
  - [OpenApiPetstore.Dog](docs/Dog.md)
  - [OpenApiPetstore.DogAllOf](docs/DogAllOf.md)
@@ -195,6 +198,8 @@ Class | Method | HTTP request | Description
  - [OpenApiPetstore.MixedPropertiesAndAdditionalPropertiesClass](docs/MixedPropertiesAndAdditionalPropertiesClass.md)
  - [OpenApiPetstore.Model200Response](docs/Model200Response.md)
  - [OpenApiPetstore.Name](docs/Name.md)
+ - [OpenApiPetstore.NestedColor](docs/NestedColor.md)
+ - [OpenApiPetstore.NestedOneOf](docs/NestedOneOf.md)
  - [OpenApiPetstore.NullableClass](docs/NullableClass.md)
  - [OpenApiPetstore.NumberOnly](docs/NumberOnly.md)
  - [OpenApiPetstore.ObjectWithDeprecatedFields](docs/ObjectWithDeprecatedFields.md)
@@ -206,6 +211,7 @@ Class | Method | HTTP request | Description
  - [OpenApiPetstore.OuterEnumIntegerDefaultValue](docs/OuterEnumIntegerDefaultValue.md)
  - [OpenApiPetstore.OuterObjectWithEnumProperty](docs/OuterObjectWithEnumProperty.md)
  - [OpenApiPetstore.Pet](docs/Pet.md)
+ - [OpenApiPetstore.Pig](docs/Pig.md)
  - [OpenApiPetstore.ReadOnlyFirst](docs/ReadOnlyFirst.md)
  - [OpenApiPetstore.Return](docs/Return.md)
  - [OpenApiPetstore.SpecialModelName](docs/SpecialModelName.md)

samples/client/petstore/javascript-apollo/docs/BasquePig.md

@@ -0,0 +1,10 @@
+# OpenApiPetstore.BasquePig
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**className** | **String** |  | 
+**color** | **String** |  | 
+
+

samples/client/petstore/javascript-apollo/docs/Color.md

@@ -0,0 +1,8 @@
+# OpenApiPetstore.Color
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+

samples/client/petstore/javascript-apollo/docs/DanishPig.md

@@ -0,0 +1,10 @@
+# OpenApiPetstore.DanishPig
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**className** | **String** |  | 
+**size** | **Number** |  | 
+
+

samples/client/petstore/javascript-apollo/docs/NestedColor.md

@@ -0,0 +1,10 @@
+# OpenApiPetstore.NestedColor
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**size** | **Number** |  | [optional] 
+**nested** | [**Color**](Color.md) |  | [optional] 
+
+

samples/client/petstore/javascript-apollo/docs/NestedOneOf.md

@@ -0,0 +1,10 @@
+# OpenApiPetstore.NestedOneOf
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**size** | **Number** |  | [optional] 
+**nestedPig** | [**Pig**](Pig.md) |  | [optional] 
+
+

samples/client/petstore/javascript-apollo/docs/Pig.md

@@ -0,0 +1,11 @@
+# OpenApiPetstore.Pig
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**className** | **String** |  | 
+**color** | **String** |  | 
+**size** | **Number** |  | 
+
+

samples/client/petstore/javascript-apollo/src/index.js

@@ -19,12 +19,15 @@ import ApiResponse from './model/ApiResponse';
 import ArrayOfArrayOfNumberOnly from './model/ArrayOfArrayOfNumberOnly';
 import ArrayOfNumberOnly from './model/ArrayOfNumberOnly';
 import ArrayTest from './model/ArrayTest';
+import BasquePig from './model/BasquePig';
 import Capitalization from './model/Capitalization';
 import Cat from './model/Cat';
 import CatAllOf from './model/CatAllOf';
 import Category from './model/Category';
 import ClassModel from './model/ClassModel';
 import Client from './model/Client';
+import Color from './model/Color';
+import DanishPig from './model/DanishPig';
 import DeprecatedObject from './model/DeprecatedObject';
 import Dog from './model/Dog';
 import DogAllOf from './model/DogAllOf';
@@ -43,6 +46,8 @@ import MapTest from './model/MapTest';
 import MixedPropertiesAndAdditionalPropertiesClass from './model/MixedPropertiesAndAdditionalPropertiesClass';
 import Model200Response from './model/Model200Response';
 import Name from './model/Name';
+import NestedColor from './model/NestedColor';
+import NestedOneOf from './model/NestedOneOf';
 import NullableClass from './model/NullableClass';
 import NumberOnly from './model/NumberOnly';
 import ObjectWithDeprecatedFields from './model/ObjectWithDeprecatedFields';
@@ -54,6 +59,7 @@ import OuterEnumInteger from './model/OuterEnumInteger';
 import OuterEnumIntegerDefaultValue from './model/OuterEnumIntegerDefaultValue';
 import OuterObjectWithEnumProperty from './model/OuterObjectWithEnumProperty';
 import Pet from './model/Pet';
+import Pig from './model/Pig';
 import ReadOnlyFirst from './model/ReadOnlyFirst';
 import Return from './model/Return';
 import SpecialModelName from './model/SpecialModelName';
@@ -142,6 +148,12 @@ export {
      */
     ArrayTest,
 
+    /**
+     * The BasquePig model constructor.
+     * @property {module:model/BasquePig}
+     */
+    BasquePig,
+
     /**
      * The Capitalization model constructor.
      * @property {module:model/Capitalization}
@@ -178,6 +190,18 @@ export {
      */
     Client,
 
+    /**
+     * The Color model constructor.
+     * @property {module:model/Color}
+     */
+    Color,
+
+    /**
+     * The DanishPig model constructor.
+     * @property {module:model/DanishPig}
+     */
+    DanishPig,
+
     /**
      * The DeprecatedObject model constructor.
      * @property {module:model/DeprecatedObject}
@@ -286,6 +310,18 @@ export {
      */
     Name,
 
+    /**
+     * The NestedColor model constructor.
+     * @property {module:model/NestedColor}
+     */
+    NestedColor,
+
+    /**
+     * The NestedOneOf model constructor.
+     * @property {module:model/NestedOneOf}
+     */
+    NestedOneOf,
+
     /**
      * The NullableClass model constructor.
      * @property {module:model/NullableClass}
@@ -352,6 +388,12 @@ export {
      */
     Pet,
 
+    /**
+     * The Pig model constructor.
+     * @property {module:model/Pig}
+     */
+    Pig,
+
     /**
      * The ReadOnlyFirst model constructor.
      * @property {module:model/ReadOnlyFirst}

samples/client/petstore/javascript-apollo/src/model/AdditionalPropertiesClass.js

@@ -57,9 +57,21 @@ class AdditionalPropertiesClass {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>AdditionalPropertiesClass</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>AdditionalPropertiesClass</code>.
+     */
+    static validateJSON(data) {
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Object.<String, String>} map_property
  */

samples/client/petstore/javascript-apollo/src/model/Animal.js

@@ -59,9 +59,35 @@ class Animal {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Animal</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Animal</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of Animal.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['className'] && !(typeof data['className'] === 'string' || data['className'] instanceof String)) {
+            throw new Error("Expected the field `className` to be a primitive type in the JSON string but got " + data['className']);
+        }
+        // ensure the json data is a string
+        if (data['color'] && !(typeof data['color'] === 'string' || data['color'] instanceof String)) {
+            throw new Error("Expected the field `color` to be a primitive type in the JSON string but got " + data['color']);
+        }
+
+        return true;
+    }
+
 
 }
 
+Animal.RequiredProperties = ["className"];
+
 /**
  * @member {String} className
  */

samples/client/petstore/javascript-apollo/src/model/ApiResponse.js

@@ -60,9 +60,29 @@ class ApiResponse {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ApiResponse</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ApiResponse</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['type'] && !(typeof data['type'] === 'string' || data['type'] instanceof String)) {
+            throw new Error("Expected the field `type` to be a primitive type in the JSON string but got " + data['type']);
+        }
+        // ensure the json data is a string
+        if (data['message'] && !(typeof data['message'] === 'string' || data['message'] instanceof String)) {
+            throw new Error("Expected the field `message` to be a primitive type in the JSON string but got " + data['message']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} code
  */

samples/client/petstore/javascript-apollo/src/model/ArrayOfArrayOfNumberOnly.js

@@ -54,9 +54,25 @@ class ArrayOfArrayOfNumberOnly {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ArrayOfArrayOfNumberOnly</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ArrayOfArrayOfNumberOnly</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is an array
+        if (!Array.isArray(data['ArrayArrayNumber'])) {
+            throw new Error("Expected the field `ArrayArrayNumber` to be an array in the JSON data but got " + data['ArrayArrayNumber']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Array.<Array.<Number>>} ArrayArrayNumber
  */

samples/client/petstore/javascript-apollo/src/model/ArrayOfNumberOnly.js

@@ -54,9 +54,25 @@ class ArrayOfNumberOnly {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ArrayOfNumberOnly</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ArrayOfNumberOnly</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is an array
+        if (!Array.isArray(data['ArrayNumber'])) {
+            throw new Error("Expected the field `ArrayNumber` to be an array in the JSON data but got " + data['ArrayNumber']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Array.<Number>} ArrayNumber
  */

samples/client/petstore/javascript-apollo/src/model/ArrayTest.js

@@ -61,9 +61,33 @@ class ArrayTest {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ArrayTest</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ArrayTest</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_of_string'])) {
+            throw new Error("Expected the field `array_of_string` to be an array in the JSON data but got " + data['array_of_string']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_array_of_integer'])) {
+            throw new Error("Expected the field `array_array_of_integer` to be an array in the JSON data but got " + data['array_array_of_integer']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_array_of_model'])) {
+            throw new Error("Expected the field `array_array_of_model` to be an array in the JSON data but got " + data['array_array_of_model']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Array.<String>} array_of_string
  */

samples/client/petstore/javascript-apollo/src/model/BasquePig.js

@@ -0,0 +1,109 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+import ApiClient from '../ApiClient';
+
+/**
+ * The BasquePig model module.
+ * @module model/BasquePig
+ * @version 1.0.0
+ */
+class BasquePig {
+    /**
+     * Constructs a new <code>BasquePig</code>.
+     * @alias module:model/BasquePig
+     * @param className {String} 
+     * @param color {String} 
+     */
+    constructor(className, color) { 
+        
+        BasquePig.initialize(this, className, color);
+    }
+
+    /**
+     * Initializes the fields of this object.
+     * This method is used by the constructors of any subclasses, in order to implement multiple inheritance (mix-ins).
+     * Only for internal use.
+     */
+    static initialize(obj, className, color) { 
+        obj['className'] = className;
+        obj['color'] = color;
+    }
+
+    /**
+     * Constructs a <code>BasquePig</code> from a plain JavaScript object, optionally creating a new instance.
+     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @param {module:model/BasquePig} obj Optional instance to populate.
+     * @return {module:model/BasquePig} The populated <code>BasquePig</code> instance.
+     */
+    static constructFromObject(data, obj) {
+        if (data) {
+            obj = obj || new BasquePig();
+
+            if (data.hasOwnProperty('className')) {
+                obj['className'] = ApiClient.convertToType(data['className'], 'String');
+            }
+            if (data.hasOwnProperty('color')) {
+                obj['color'] = ApiClient.convertToType(data['color'], 'String');
+            }
+        }
+        return obj;
+    }
+
+    /**
+     * Validates the JSON data with respect to <code>BasquePig</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>BasquePig</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of BasquePig.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['className'] && !(typeof data['className'] === 'string' || data['className'] instanceof String)) {
+            throw new Error("Expected the field `className` to be a primitive type in the JSON string but got " + data['className']);
+        }
+        // ensure the json data is a string
+        if (data['color'] && !(typeof data['color'] === 'string' || data['color'] instanceof String)) {
+            throw new Error("Expected the field `color` to be a primitive type in the JSON string but got " + data['color']);
+        }
+
+        return true;
+    }
+
+
+}
+
+BasquePig.RequiredProperties = ["className", "color"];
+
+/**
+ * @member {String} className
+ */
+BasquePig.prototype['className'] = undefined;
+
+/**
+ * @member {String} color
+ */
+BasquePig.prototype['color'] = undefined;
+
+
+
+
+
+
+export default BasquePig;
+

samples/client/petstore/javascript-apollo/src/model/Capitalization.js

@@ -69,9 +69,45 @@ class Capitalization {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Capitalization</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Capitalization</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['smallCamel'] && !(typeof data['smallCamel'] === 'string' || data['smallCamel'] instanceof String)) {
+            throw new Error("Expected the field `smallCamel` to be a primitive type in the JSON string but got " + data['smallCamel']);
+        }
+        // ensure the json data is a string
+        if (data['CapitalCamel'] && !(typeof data['CapitalCamel'] === 'string' || data['CapitalCamel'] instanceof String)) {
+            throw new Error("Expected the field `CapitalCamel` to be a primitive type in the JSON string but got " + data['CapitalCamel']);
+        }
+        // ensure the json data is a string
+        if (data['small_Snake'] && !(typeof data['small_Snake'] === 'string' || data['small_Snake'] instanceof String)) {
+            throw new Error("Expected the field `small_Snake` to be a primitive type in the JSON string but got " + data['small_Snake']);
+        }
+        // ensure the json data is a string
+        if (data['Capital_Snake'] && !(typeof data['Capital_Snake'] === 'string' || data['Capital_Snake'] instanceof String)) {
+            throw new Error("Expected the field `Capital_Snake` to be a primitive type in the JSON string but got " + data['Capital_Snake']);
+        }
+        // ensure the json data is a string
+        if (data['SCA_ETH_Flow_Points'] && !(typeof data['SCA_ETH_Flow_Points'] === 'string' || data['SCA_ETH_Flow_Points'] instanceof String)) {
+            throw new Error("Expected the field `SCA_ETH_Flow_Points` to be a primitive type in the JSON string but got " + data['SCA_ETH_Flow_Points']);
+        }
+        // ensure the json data is a string
+        if (data['ATT_NAME'] && !(typeof data['ATT_NAME'] === 'string' || data['ATT_NAME'] instanceof String)) {
+            throw new Error("Expected the field `ATT_NAME` to be a primitive type in the JSON string but got " + data['ATT_NAME']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} smallCamel
  */

samples/client/petstore/javascript-apollo/src/model/Cat.js

@@ -63,9 +63,27 @@ class Cat {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Cat</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Cat</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of Cat.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+
+        return true;
+    }
+
 
 }
 
+Cat.RequiredProperties = ["className"];
+
 /**
  * @member {Boolean} declawed
  */

samples/client/petstore/javascript-apollo/src/model/CatAllOf.js

@@ -54,9 +54,21 @@ class CatAllOf {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>CatAllOf</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>CatAllOf</code>.
+     */
+    static validateJSON(data) {
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Boolean} declawed
  */

samples/client/petstore/javascript-apollo/src/model/Category.js

@@ -59,9 +59,31 @@ class Category {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Category</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Category</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of Category.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['name'] && !(typeof data['name'] === 'string' || data['name'] instanceof String)) {
+            throw new Error("Expected the field `name` to be a primitive type in the JSON string but got " + data['name']);
+        }
+
+        return true;
+    }
+
 
 }
 
+Category.RequiredProperties = ["name"];
+
 /**
  * @member {Number} id
  */

samples/client/petstore/javascript-apollo/src/model/ClassModel.js

@@ -55,9 +55,25 @@ class ClassModel {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ClassModel</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ClassModel</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['_class'] && !(typeof data['_class'] === 'string' || data['_class'] instanceof String)) {
+            throw new Error("Expected the field `_class` to be a primitive type in the JSON string but got " + data['_class']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} _class
  */

samples/client/petstore/javascript-apollo/src/model/Client.js

@@ -54,9 +54,25 @@ class Client {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Client</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Client</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['client'] && !(typeof data['client'] === 'string' || data['client'] instanceof String)) {
+            throw new Error("Expected the field `client` to be a primitive type in the JSON string but got " + data['client']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} client
  */

samples/client/petstore/javascript-apollo/src/model/Color.js

@@ -0,0 +1,154 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+import ApiClient from '../ApiClient';
+
+/**
+ * The Color model module.
+ * @module model/Color
+ * @version 1.0.0
+ */
+class Color {
+    /**
+     * Constructs a new <code>Color</code>.
+     * RGB array, RGBA array, or hex string.
+     * @alias module:model/Color
+     * @param {(module:model/String|module:model/[Number])} The actual instance to initialize Color.
+     */
+    constructor(obj = null) {
+        this.actualInstance = obj;
+    }
+
+    /**
+     * Constructs a <code>Color</code> from a plain JavaScript object, optionally creating a new instance.
+     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @param {module:model/Color} obj Optional instance to populate.
+     * @return {module:model/Color} The populated <code>Color</code> instance.
+     */
+    static constructFromObject(data, obj) {
+        if (!data) {
+            return new Color();
+        }
+        var match = 0;
+        var errorMessages = [];
+        // RGB three element array with values 0-255.
+        try {
+            // validate array data type
+            if (!Array.isArray(data)) {
+                throw new Error("Invalid data type. Expecting array. Data: " + data);
+            }
+            if (data.length > 3 || data.length < 3) {
+                throw new Error("Invalid array size. Minimim: 3. Maximum: 3. Data: " + data);
+            }
+            // validate array of integer
+            for (const item of data) {
+                if (!(typeof item === 'number' && item % 1 === 0)) {
+                    throw new Error("Invalid array items. Must be integer. Data: " + data);
+                }
+                if (item > 255 || item < 0) {
+                    throw new Error("Invalid integer value in an array items. Max.: 255. Min.: 0. Data: " + data);
+                }
+            }
+            obj = new Color(data);
+            match++;
+        } catch(err) {
+            // json data failed to deserialize into [Number]
+            errorMessages.push("Failed to construct [Number]: " + err)
+        }
+
+        // RGBA four element array with values 0-255.
+        try {
+            // validate array data type
+            if (!Array.isArray(data)) {
+                throw new Error("Invalid data type. Expecting array. Data: " + data);
+            }
+            if (data.length > 4 || data.length < 4) {
+                throw new Error("Invalid array size. Minimim: 4. Maximum: 4. Data: " + data);
+            }
+            // validate array of integer
+            for (const item of data) {
+                if (!(typeof item === 'number' && item % 1 === 0)) {
+                    throw new Error("Invalid array items. Must be integer. Data: " + data);
+                }
+                if (item > 255 || item < 0) {
+                    throw new Error("Invalid integer value in an array items. Max.: 255. Min.: 0. Data: " + data);
+                }
+            }
+            obj = new Color(data);
+            match++;
+        } catch(err) {
+            // json data failed to deserialize into [Number]
+            errorMessages.push("Failed to construct [Number]: " + err)
+        }
+
+        // Hex color string, such as #00FF00.
+        try {
+            // validate array of string
+            if (!(typeof data === 'string')) {
+                throw new Error("Invalid data. Must be string. Data: " + JSON.stringify(data));
+            }
+            if (!/^#(?:[0-9a-fA-F]{3}){1,2}$/.test(data)) {
+                throw new Error("Invalid string value in an array items. Must conform to /^#(?:[0-9a-fA-F]{3}){1,2}$/. Data: " + JSON.stringify(data));
+            }
+            if (data.length > 7 && data.length < 7) {
+                throw new Error("Invalid string value in an array items. Max. length: 7. Min. length: 7. Data: " + JSON.stringify(data));
+            }
+            obj = new Color(data);
+            match++;
+        } catch(err) {
+            // json data failed to deserialize into String
+            errorMessages.push("Failed to construct String: " + err)
+        }
+
+        if (match > 1) {
+            throw new Error("Multiple matches found constructing `Color` with oneOf schemas String, [Number]. JSON data: " + JSON.stringify(data));
+        } else if (match === 0) {
+            throw new Error("No match found constructing `Color` with oneOf schemas String, [Number]. Details: " +
+                            errorMessages.join(", "));
+        } else { // only 1 match
+            return obj;
+        }
+    }
+
+    /**
+     * Gets the actaul instance, which can be <code>String</code>, <code>[Number]</code>.
+     * @return {(module:model/String|module:model/[Number])} The actual instance.
+     */
+    getActualInstance() {
+        return this.actualInstance;
+    }
+
+    /**
+     * Sets the actaul instance, which can be <code>String</code>, <code>[Number]</code>.
+     * @param {(module:model/String|module:model/[Number])} obj The actual instance.
+     */
+    setActualInstance(obj) {
+       this.actualInstance = Color.constructFromObject(obj).getActualInstance();
+    }
+
+    /**
+     * Returns the JSON representation of the actual intance.
+     * @return {string}
+     */
+    toJSON = function(){
+        return this.getActualInstance();
+    }
+
+}
+
+
+Color.OneOf = ["String", "[Number]"];
+
+export default Color;
+

samples/client/petstore/javascript-apollo/src/model/DanishPig.js

@@ -0,0 +1,105 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+import ApiClient from '../ApiClient';
+
+/**
+ * The DanishPig model module.
+ * @module model/DanishPig
+ * @version 1.0.0
+ */
+class DanishPig {
+    /**
+     * Constructs a new <code>DanishPig</code>.
+     * @alias module:model/DanishPig
+     * @param className {String} 
+     * @param size {Number} 
+     */
+    constructor(className, size) { 
+        
+        DanishPig.initialize(this, className, size);
+    }
+
+    /**
+     * Initializes the fields of this object.
+     * This method is used by the constructors of any subclasses, in order to implement multiple inheritance (mix-ins).
+     * Only for internal use.
+     */
+    static initialize(obj, className, size) { 
+        obj['className'] = className;
+        obj['size'] = size;
+    }
+
+    /**
+     * Constructs a <code>DanishPig</code> from a plain JavaScript object, optionally creating a new instance.
+     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @param {module:model/DanishPig} obj Optional instance to populate.
+     * @return {module:model/DanishPig} The populated <code>DanishPig</code> instance.
+     */
+    static constructFromObject(data, obj) {
+        if (data) {
+            obj = obj || new DanishPig();
+
+            if (data.hasOwnProperty('className')) {
+                obj['className'] = ApiClient.convertToType(data['className'], 'String');
+            }
+            if (data.hasOwnProperty('size')) {
+                obj['size'] = ApiClient.convertToType(data['size'], 'Number');
+            }
+        }
+        return obj;
+    }
+
+    /**
+     * Validates the JSON data with respect to <code>DanishPig</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>DanishPig</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of DanishPig.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['className'] && !(typeof data['className'] === 'string' || data['className'] instanceof String)) {
+            throw new Error("Expected the field `className` to be a primitive type in the JSON string but got " + data['className']);
+        }
+
+        return true;
+    }
+
+
+}
+
+DanishPig.RequiredProperties = ["className", "size"];
+
+/**
+ * @member {String} className
+ */
+DanishPig.prototype['className'] = undefined;
+
+/**
+ * @member {Number} size
+ */
+DanishPig.prototype['size'] = undefined;
+
+
+
+
+
+
+export default DanishPig;
+

samples/client/petstore/javascript-apollo/src/model/DeprecatedObject.js

@@ -54,9 +54,25 @@ class DeprecatedObject {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>DeprecatedObject</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>DeprecatedObject</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['name'] && !(typeof data['name'] === 'string' || data['name'] instanceof String)) {
+            throw new Error("Expected the field `name` to be a primitive type in the JSON string but got " + data['name']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} name
  */

samples/client/petstore/javascript-apollo/src/model/Dog.js

@@ -63,9 +63,31 @@ class Dog {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Dog</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Dog</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of Dog.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['breed'] && !(typeof data['breed'] === 'string' || data['breed'] instanceof String)) {
+            throw new Error("Expected the field `breed` to be a primitive type in the JSON string but got " + data['breed']);
+        }
+
+        return true;
+    }
+
 
 }
 
+Dog.RequiredProperties = ["className"];
+
 /**
  * @member {String} breed
  */

samples/client/petstore/javascript-apollo/src/model/DogAllOf.js

@@ -54,9 +54,25 @@ class DogAllOf {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>DogAllOf</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>DogAllOf</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['breed'] && !(typeof data['breed'] === 'string' || data['breed'] instanceof String)) {
+            throw new Error("Expected the field `breed` to be a primitive type in the JSON string but got " + data['breed']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} breed
  */

samples/client/petstore/javascript-apollo/src/model/EnumArrays.js

@@ -57,9 +57,29 @@ class EnumArrays {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>EnumArrays</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>EnumArrays</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['just_symbol'] && !(typeof data['just_symbol'] === 'string' || data['just_symbol'] instanceof String)) {
+            throw new Error("Expected the field `just_symbol` to be a primitive type in the JSON string but got " + data['just_symbol']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_enum'])) {
+            throw new Error("Expected the field `array_enum` to be an array in the JSON data but got " + data['array_enum']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {module:model/EnumArrays.JustSymbolEnum} just_symbol
  */

samples/client/petstore/javascript-apollo/src/model/EnumTest.js

@@ -81,9 +81,35 @@ class EnumTest {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>EnumTest</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>EnumTest</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of EnumTest.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['enum_string'] && !(typeof data['enum_string'] === 'string' || data['enum_string'] instanceof String)) {
+            throw new Error("Expected the field `enum_string` to be a primitive type in the JSON string but got " + data['enum_string']);
+        }
+        // ensure the json data is a string
+        if (data['enum_string_required'] && !(typeof data['enum_string_required'] === 'string' || data['enum_string_required'] instanceof String)) {
+            throw new Error("Expected the field `enum_string_required` to be a primitive type in the JSON string but got " + data['enum_string_required']);
+        }
+
+        return true;
+    }
+
 
 }
 
+EnumTest.RequiredProperties = ["enum_string_required"];
+
 /**
  * @member {module:model/EnumTest.EnumStringEnum} enum_string
  */

samples/client/petstore/javascript-apollo/src/model/File.js

@@ -55,9 +55,25 @@ class File {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>File</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>File</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['sourceURI'] && !(typeof data['sourceURI'] === 'string' || data['sourceURI'] instanceof String)) {
+            throw new Error("Expected the field `sourceURI` to be a primitive type in the JSON string but got " + data['sourceURI']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * Test capitalization
  * @member {String} sourceURI

samples/client/petstore/javascript-apollo/src/model/FileSchemaTestClass.js

@@ -57,9 +57,35 @@ class FileSchemaTestClass {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>FileSchemaTestClass</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>FileSchemaTestClass</code>.
+     */
+    static validateJSON(data) {
+        // validate the optional field `file`
+        if (data['file']) { // data not null
+          File.validateJSON(data['file']);
+        }
+        if (data['files']) { // data not null
+            // ensure the json data is an array
+            if (!Array.isArray(data['files'])) {
+                throw new Error("Expected the field `files` to be an array in the JSON data but got " + data['files']);
+            }
+            // validate the optional field `files` (array)
+            for (const item of data['files']) {
+                File.validateJsonObject(item);
+            };
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {File} file
  */

samples/client/petstore/javascript-apollo/src/model/Foo.js

@@ -54,9 +54,25 @@ class Foo {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Foo</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Foo</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['bar'] && !(typeof data['bar'] === 'string' || data['bar'] instanceof String)) {
+            throw new Error("Expected the field `bar` to be a primitive type in the JSON string but got " + data['bar']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} bar
  * @default 'bar'

samples/client/petstore/javascript-apollo/src/model/FooGetDefaultResponse.js

@@ -55,9 +55,25 @@ class FooGetDefaultResponse {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>FooGetDefaultResponse</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>FooGetDefaultResponse</code>.
+     */
+    static validateJSON(data) {
+        // validate the optional field `string`
+        if (data['string']) { // data not null
+          Foo.validateJSON(data['string']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {module:model/Foo} string
  */

samples/client/petstore/javascript-apollo/src/model/FormatTest.js

@@ -107,9 +107,47 @@ class FormatTest {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>FormatTest</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>FormatTest</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of FormatTest.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['string'] && !(typeof data['string'] === 'string' || data['string'] instanceof String)) {
+            throw new Error("Expected the field `string` to be a primitive type in the JSON string but got " + data['string']);
+        }
+        // ensure the json data is a string
+        if (data['uuid'] && !(typeof data['uuid'] === 'string' || data['uuid'] instanceof String)) {
+            throw new Error("Expected the field `uuid` to be a primitive type in the JSON string but got " + data['uuid']);
+        }
+        // ensure the json data is a string
+        if (data['password'] && !(typeof data['password'] === 'string' || data['password'] instanceof String)) {
+            throw new Error("Expected the field `password` to be a primitive type in the JSON string but got " + data['password']);
+        }
+        // ensure the json data is a string
+        if (data['pattern_with_digits'] && !(typeof data['pattern_with_digits'] === 'string' || data['pattern_with_digits'] instanceof String)) {
+            throw new Error("Expected the field `pattern_with_digits` to be a primitive type in the JSON string but got " + data['pattern_with_digits']);
+        }
+        // ensure the json data is a string
+        if (data['pattern_with_digits_and_delimiter'] && !(typeof data['pattern_with_digits_and_delimiter'] === 'string' || data['pattern_with_digits_and_delimiter'] instanceof String)) {
+            throw new Error("Expected the field `pattern_with_digits_and_delimiter` to be a primitive type in the JSON string but got " + data['pattern_with_digits_and_delimiter']);
+        }
+
+        return true;
+    }
+
 
 }
 
+FormatTest.RequiredProperties = ["number", "byte", "date", "password"];
+
 /**
  * @member {Number} integer
  */

samples/client/petstore/javascript-apollo/src/model/HasOnlyReadOnly.js

@@ -57,9 +57,29 @@ class HasOnlyReadOnly {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>HasOnlyReadOnly</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>HasOnlyReadOnly</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['bar'] && !(typeof data['bar'] === 'string' || data['bar'] instanceof String)) {
+            throw new Error("Expected the field `bar` to be a primitive type in the JSON string but got " + data['bar']);
+        }
+        // ensure the json data is a string
+        if (data['foo'] && !(typeof data['foo'] === 'string' || data['foo'] instanceof String)) {
+            throw new Error("Expected the field `foo` to be a primitive type in the JSON string but got " + data['foo']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} bar
  */

samples/client/petstore/javascript-apollo/src/model/HealthCheckResult.js

@@ -55,9 +55,25 @@ class HealthCheckResult {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>HealthCheckResult</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>HealthCheckResult</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['NullableMessage'] && !(typeof data['NullableMessage'] === 'string' || data['NullableMessage'] instanceof String)) {
+            throw new Error("Expected the field `NullableMessage` to be a primitive type in the JSON string but got " + data['NullableMessage']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} NullableMessage
  */

samples/client/petstore/javascript-apollo/src/model/List.js

@@ -54,9 +54,25 @@ class List {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>List</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>List</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['123-list'] && !(typeof data['123-list'] === 'string' || data['123-list'] instanceof String)) {
+            throw new Error("Expected the field `123-list` to be a primitive type in the JSON string but got " + data['123-list']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} 123-list
  */

samples/client/petstore/javascript-apollo/src/model/MapTest.js

@@ -63,9 +63,21 @@ class MapTest {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>MapTest</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>MapTest</code>.
+     */
+    static validateJSON(data) {
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Object.<String, Object.<String, String>>} map_map_of_string
  */

samples/client/petstore/javascript-apollo/src/model/MixedPropertiesAndAdditionalPropertiesClass.js

@@ -61,9 +61,25 @@ class MixedPropertiesAndAdditionalPropertiesClass {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>MixedPropertiesAndAdditionalPropertiesClass</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>MixedPropertiesAndAdditionalPropertiesClass</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['uuid'] && !(typeof data['uuid'] === 'string' || data['uuid'] instanceof String)) {
+            throw new Error("Expected the field `uuid` to be a primitive type in the JSON string but got " + data['uuid']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} uuid
  */

samples/client/petstore/javascript-apollo/src/model/Model200Response.js

@@ -58,9 +58,25 @@ class Model200Response {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Model200Response</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Model200Response</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['class'] && !(typeof data['class'] === 'string' || data['class'] instanceof String)) {
+            throw new Error("Expected the field `class` to be a primitive type in the JSON string but got " + data['class']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} name
  */

samples/client/petstore/javascript-apollo/src/model/Name.js

@@ -66,9 +66,31 @@ class Name {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Name</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Name</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of Name.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['property'] && !(typeof data['property'] === 'string' || data['property'] instanceof String)) {
+            throw new Error("Expected the field `property` to be a primitive type in the JSON string but got " + data['property']);
+        }
+
+        return true;
+    }
+
 
 }
 
+Name.RequiredProperties = ["name"];
+
 /**
  * @member {Number} name
  */

samples/client/petstore/javascript-apollo/src/model/NestedColor.js

@@ -0,0 +1,96 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+import ApiClient from '../ApiClient';
+import Color from './Color';
+
+/**
+ * The NestedColor model module.
+ * @module model/NestedColor
+ * @version 1.0.0
+ */
+class NestedColor {
+    /**
+     * Constructs a new <code>NestedColor</code>.
+     * @alias module:model/NestedColor
+     */
+    constructor() { 
+        
+        NestedColor.initialize(this);
+    }
+
+    /**
+     * Initializes the fields of this object.
+     * This method is used by the constructors of any subclasses, in order to implement multiple inheritance (mix-ins).
+     * Only for internal use.
+     */
+    static initialize(obj) { 
+    }
+
+    /**
+     * Constructs a <code>NestedColor</code> from a plain JavaScript object, optionally creating a new instance.
+     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @param {module:model/NestedColor} obj Optional instance to populate.
+     * @return {module:model/NestedColor} The populated <code>NestedColor</code> instance.
+     */
+    static constructFromObject(data, obj) {
+        if (data) {
+            obj = obj || new NestedColor();
+
+            if (data.hasOwnProperty('size')) {
+                obj['size'] = ApiClient.convertToType(data['size'], 'Number');
+            }
+            if (data.hasOwnProperty('nested')) {
+                obj['nested'] = Color.constructFromObject(data['nested']);
+            }
+        }
+        return obj;
+    }
+
+    /**
+     * Validates the JSON data with respect to <code>NestedColor</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>NestedColor</code>.
+     */
+    static validateJSON(data) {
+        // validate the optional field `nested`
+        if (data['nested']) { // data not null
+          Color.validateJSON(data['nested']);
+        }
+
+        return true;
+    }
+
+
+}
+
+
+
+/**
+ * @member {Number} size
+ */
+NestedColor.prototype['size'] = undefined;
+
+/**
+ * @member {module:model/Color} nested
+ */
+NestedColor.prototype['nested'] = undefined;
+
+
+
+
+
+
+export default NestedColor;
+

samples/client/petstore/javascript-apollo/src/model/NestedOneOf.js

@@ -0,0 +1,96 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+import ApiClient from '../ApiClient';
+import Pig from './Pig';
+
+/**
+ * The NestedOneOf model module.
+ * @module model/NestedOneOf
+ * @version 1.0.0
+ */
+class NestedOneOf {
+    /**
+     * Constructs a new <code>NestedOneOf</code>.
+     * @alias module:model/NestedOneOf
+     */
+    constructor() { 
+        
+        NestedOneOf.initialize(this);
+    }
+
+    /**
+     * Initializes the fields of this object.
+     * This method is used by the constructors of any subclasses, in order to implement multiple inheritance (mix-ins).
+     * Only for internal use.
+     */
+    static initialize(obj) { 
+    }
+
+    /**
+     * Constructs a <code>NestedOneOf</code> from a plain JavaScript object, optionally creating a new instance.
+     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @param {module:model/NestedOneOf} obj Optional instance to populate.
+     * @return {module:model/NestedOneOf} The populated <code>NestedOneOf</code> instance.
+     */
+    static constructFromObject(data, obj) {
+        if (data) {
+            obj = obj || new NestedOneOf();
+
+            if (data.hasOwnProperty('size')) {
+                obj['size'] = ApiClient.convertToType(data['size'], 'Number');
+            }
+            if (data.hasOwnProperty('nested_pig')) {
+                obj['nested_pig'] = Pig.constructFromObject(data['nested_pig']);
+            }
+        }
+        return obj;
+    }
+
+    /**
+     * Validates the JSON data with respect to <code>NestedOneOf</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>NestedOneOf</code>.
+     */
+    static validateJSON(data) {
+        // validate the optional field `nested_pig`
+        if (data['nested_pig']) { // data not null
+          Pig.validateJSON(data['nested_pig']);
+        }
+
+        return true;
+    }
+
+
+}
+
+
+
+/**
+ * @member {Number} size
+ */
+NestedOneOf.prototype['size'] = undefined;
+
+/**
+ * @member {module:model/Pig} nested_pig
+ */
+NestedOneOf.prototype['nested_pig'] = undefined;
+
+
+
+
+
+
+export default NestedOneOf;
+

samples/client/petstore/javascript-apollo/src/model/NullableClass.js

@@ -91,9 +91,37 @@ class NullableClass {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>NullableClass</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>NullableClass</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['string_prop'] && !(typeof data['string_prop'] === 'string' || data['string_prop'] instanceof String)) {
+            throw new Error("Expected the field `string_prop` to be a primitive type in the JSON string but got " + data['string_prop']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_nullable_prop'])) {
+            throw new Error("Expected the field `array_nullable_prop` to be an array in the JSON data but got " + data['array_nullable_prop']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_and_items_nullable_prop'])) {
+            throw new Error("Expected the field `array_and_items_nullable_prop` to be an array in the JSON data but got " + data['array_and_items_nullable_prop']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_items_nullable'])) {
+            throw new Error("Expected the field `array_items_nullable` to be an array in the JSON data but got " + data['array_items_nullable']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} integer_prop
  */

samples/client/petstore/javascript-apollo/src/model/NumberOnly.js

@@ -54,9 +54,21 @@ class NumberOnly {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>NumberOnly</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>NumberOnly</code>.
+     */
+    static validateJSON(data) {
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} JustNumber
  */

samples/client/petstore/javascript-apollo/src/model/ObjectWithDeprecatedFields.js

@@ -64,9 +64,33 @@ class ObjectWithDeprecatedFields {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ObjectWithDeprecatedFields</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ObjectWithDeprecatedFields</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['uuid'] && !(typeof data['uuid'] === 'string' || data['uuid'] instanceof String)) {
+            throw new Error("Expected the field `uuid` to be a primitive type in the JSON string but got " + data['uuid']);
+        }
+        // validate the optional field `deprecatedRef`
+        if (data['deprecatedRef']) { // data not null
+          DeprecatedObject.validateJSON(data['deprecatedRef']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['bars'])) {
+            throw new Error("Expected the field `bars` to be an array in the JSON data but got " + data['bars']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} uuid
  */

samples/client/petstore/javascript-apollo/src/model/Order.js

@@ -69,9 +69,25 @@ class Order {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Order</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Order</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['status'] && !(typeof data['status'] === 'string' || data['status'] instanceof String)) {
+            throw new Error("Expected the field `status` to be a primitive type in the JSON string but got " + data['status']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} id
  */

samples/client/petstore/javascript-apollo/src/model/OuterComposite.js

@@ -60,9 +60,25 @@ class OuterComposite {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>OuterComposite</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>OuterComposite</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['my_string'] && !(typeof data['my_string'] === 'string' || data['my_string'] instanceof String)) {
+            throw new Error("Expected the field `my_string` to be a primitive type in the JSON string but got " + data['my_string']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} my_number
  */

samples/client/petstore/javascript-apollo/src/model/OuterObjectWithEnumProperty.js

@@ -57,9 +57,27 @@ class OuterObjectWithEnumProperty {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>OuterObjectWithEnumProperty</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>OuterObjectWithEnumProperty</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of OuterObjectWithEnumProperty.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+
+        return true;
+    }
+
 
 }
 
+OuterObjectWithEnumProperty.RequiredProperties = ["value"];
+
 /**
  * @member {module:model/OuterEnumInteger} value
  */

samples/client/petstore/javascript-apollo/src/model/Pet.js

@@ -75,9 +75,53 @@ class Pet {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Pet</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Pet</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of Pet.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // validate the optional field `category`
+        if (data['category']) { // data not null
+          Category.validateJSON(data['category']);
+        }
+        // ensure the json data is a string
+        if (data['name'] && !(typeof data['name'] === 'string' || data['name'] instanceof String)) {
+            throw new Error("Expected the field `name` to be a primitive type in the JSON string but got " + data['name']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['photoUrls'])) {
+            throw new Error("Expected the field `photoUrls` to be an array in the JSON data but got " + data['photoUrls']);
+        }
+        if (data['tags']) { // data not null
+            // ensure the json data is an array
+            if (!Array.isArray(data['tags'])) {
+                throw new Error("Expected the field `tags` to be an array in the JSON data but got " + data['tags']);
+            }
+            // validate the optional field `tags` (array)
+            for (const item of data['tags']) {
+                Tag.validateJsonObject(item);
+            };
+        }
+        // ensure the json data is a string
+        if (data['status'] && !(typeof data['status'] === 'string' || data['status'] instanceof String)) {
+            throw new Error("Expected the field `status` to be a primitive type in the JSON string but got " + data['status']);
+        }
+
+        return true;
+    }
+
 
 }
 
+Pet.RequiredProperties = ["name", "photoUrls"];
+
 /**
  * @member {Number} id
  */

samples/client/petstore/javascript-apollo/src/model/Pig.js

@@ -0,0 +1,123 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+import ApiClient from '../ApiClient';
+import BasquePig from './BasquePig';
+import DanishPig from './DanishPig';
+
+/**
+ * The Pig model module.
+ * @module model/Pig
+ * @version 1.0.0
+ */
+class Pig {
+    /**
+     * Constructs a new <code>Pig</code>.
+     * @alias module:model/Pig
+     * @param {(module:model/BasquePig|module:model/DanishPig)} The actual instance to initialize Pig.
+     */
+    constructor(obj = null) {
+        this.actualInstance = obj;
+    }
+
+    /**
+     * Constructs a <code>Pig</code> from a plain JavaScript object, optionally creating a new instance.
+     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @param {module:model/Pig} obj Optional instance to populate.
+     * @return {module:model/Pig} The populated <code>Pig</code> instance.
+     */
+    static constructFromObject(data, obj) {
+        if (!data) {
+            return new Pig();
+        }
+        var match = 0;
+        var errorMessages = [];
+        try {
+            // validate the JSON data
+            BasquePig.validateJSON(data);
+            // create BasquePig from JSON data
+            obj = new Pig(BasquePig.constructFromObject(data));
+            match++;
+        } catch(err) {
+            // json data failed to deserialize into BasquePig
+            errorMessages.push("Failed to construct BasquePig: " + err)
+        }
+
+        try {
+            // validate the JSON data
+            DanishPig.validateJSON(data);
+            // create DanishPig from JSON data
+            obj = new Pig(DanishPig.constructFromObject(data));
+            match++;
+        } catch(err) {
+            // json data failed to deserialize into DanishPig
+            errorMessages.push("Failed to construct DanishPig: " + err)
+        }
+
+        if (match > 1) {
+            throw new Error("Multiple matches found constructing `Pig` with oneOf schemas BasquePig, DanishPig. JSON data: " + JSON.stringify(data));
+        } else if (match === 0) {
+            throw new Error("No match found constructing `Pig` with oneOf schemas BasquePig, DanishPig. Details: " +
+                            errorMessages.join(", "));
+        } else { // only 1 match
+            return obj;
+        }
+    }
+
+    /**
+     * Gets the actaul instance, which can be <code>BasquePig</code>, <code>DanishPig</code>.
+     * @return {(module:model/BasquePig|module:model/DanishPig)} The actual instance.
+     */
+    getActualInstance() {
+        return this.actualInstance;
+    }
+
+    /**
+     * Sets the actaul instance, which can be <code>BasquePig</code>, <code>DanishPig</code>.
+     * @param {(module:model/BasquePig|module:model/DanishPig)} obj The actual instance.
+     */
+    setActualInstance(obj) {
+       this.actualInstance = Pig.constructFromObject(obj).getActualInstance();
+    }
+
+    /**
+     * Returns the JSON representation of the actual intance.
+     * @return {string}
+     */
+    toJSON = function(){
+        return this.getActualInstance();
+    }
+
+}
+
+/**
+ * @member {String} className
+ */
+Pig.prototype['className'] = undefined;
+
+/**
+ * @member {String} color
+ */
+Pig.prototype['color'] = undefined;
+
+/**
+ * @member {Number} size
+ */
+Pig.prototype['size'] = undefined;
+
+
+Pig.OneOf = ["BasquePig", "DanishPig"];
+
+export default Pig;
+

samples/client/petstore/javascript-apollo/src/model/ReadOnlyFirst.js

@@ -57,9 +57,29 @@ class ReadOnlyFirst {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ReadOnlyFirst</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ReadOnlyFirst</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['bar'] && !(typeof data['bar'] === 'string' || data['bar'] instanceof String)) {
+            throw new Error("Expected the field `bar` to be a primitive type in the JSON string but got " + data['bar']);
+        }
+        // ensure the json data is a string
+        if (data['baz'] && !(typeof data['baz'] === 'string' || data['baz'] instanceof String)) {
+            throw new Error("Expected the field `baz` to be a primitive type in the JSON string but got " + data['baz']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} bar
  */

samples/client/petstore/javascript-apollo/src/model/Return.js

@@ -55,9 +55,21 @@ class Return {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Return</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Return</code>.
+     */
+    static validateJSON(data) {
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} return
  */

samples/client/petstore/javascript-apollo/src/model/SpecialModelName.js

@@ -54,9 +54,21 @@ class SpecialModelName {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>SpecialModelName</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>SpecialModelName</code>.
+     */
+    static validateJSON(data) {
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} $special[property.name]
  */

samples/client/petstore/javascript-apollo/src/model/Tag.js

@@ -57,9 +57,25 @@ class Tag {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Tag</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Tag</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['name'] && !(typeof data['name'] === 'string' || data['name'] instanceof String)) {
+            throw new Error("Expected the field `name` to be a primitive type in the JSON string but got " + data['name']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} id
  */

samples/client/petstore/javascript-apollo/src/model/User.js

@@ -75,9 +75,45 @@ class User {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>User</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>User</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['username'] && !(typeof data['username'] === 'string' || data['username'] instanceof String)) {
+            throw new Error("Expected the field `username` to be a primitive type in the JSON string but got " + data['username']);
+        }
+        // ensure the json data is a string
+        if (data['firstName'] && !(typeof data['firstName'] === 'string' || data['firstName'] instanceof String)) {
+            throw new Error("Expected the field `firstName` to be a primitive type in the JSON string but got " + data['firstName']);
+        }
+        // ensure the json data is a string
+        if (data['lastName'] && !(typeof data['lastName'] === 'string' || data['lastName'] instanceof String)) {
+            throw new Error("Expected the field `lastName` to be a primitive type in the JSON string but got " + data['lastName']);
+        }
+        // ensure the json data is a string
+        if (data['email'] && !(typeof data['email'] === 'string' || data['email'] instanceof String)) {
+            throw new Error("Expected the field `email` to be a primitive type in the JSON string but got " + data['email']);
+        }
+        // ensure the json data is a string
+        if (data['password'] && !(typeof data['password'] === 'string' || data['password'] instanceof String)) {
+            throw new Error("Expected the field `password` to be a primitive type in the JSON string but got " + data['password']);
+        }
+        // ensure the json data is a string
+        if (data['phone'] && !(typeof data['phone'] === 'string' || data['phone'] instanceof String)) {
+            throw new Error("Expected the field `phone` to be a primitive type in the JSON string but got " + data['phone']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} id
  */

samples/client/petstore/javascript-apollo/test/model/BasquePig.spec.js

@@ -0,0 +1,71 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+(function(root, factory) {
+  if (typeof define === 'function' && define.amd) {
+    // AMD.
+    define(['expect.js', process.cwd()+'/src/index'], factory);
+  } else if (typeof module === 'object' && module.exports) {
+    // CommonJS-like environments that support module.exports, like Node.
+    factory(require('expect.js'), require(process.cwd()+'/src/index'));
+  } else {
+    // Browser globals (root is window)
+    factory(root.expect, root.OpenApiPetstore);
+  }
+}(this, function(expect, OpenApiPetstore) {
+  'use strict';
+
+  var instance;
+
+  beforeEach(function() {
+    instance = new OpenApiPetstore.BasquePig();
+  });
+
+  var getProperty = function(object, getter, property) {
+    // Use getter method if present; otherwise, get the property directly.
+    if (typeof object[getter] === 'function')
+      return object[getter]();
+    else
+      return object[property];
+  }
+
+  var setProperty = function(object, setter, property, value) {
+    // Use setter method if present; otherwise, set the property directly.
+    if (typeof object[setter] === 'function')
+      object[setter](value);
+    else
+      object[property] = value;
+  }
+
+  describe('BasquePig', function() {
+    it('should create an instance of BasquePig', function() {
+      // uncomment below and update the code to test BasquePig
+      //var instance = new OpenApiPetstore.BasquePig();
+      //expect(instance).to.be.a(OpenApiPetstore.BasquePig);
+    });
+
+    it('should have the property className (base name: "className")', function() {
+      // uncomment below and update the code to test the property className
+      //var instance = new OpenApiPetstore.BasquePig();
+      //expect(instance).to.be();
+    });
+
+    it('should have the property color (base name: "color")', function() {
+      // uncomment below and update the code to test the property color
+      //var instance = new OpenApiPetstore.BasquePig();
+      //expect(instance).to.be();
+    });
+
+  });
+
+}));

samples/client/petstore/javascript-apollo/test/model/Color.spec.js

@@ -0,0 +1,59 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+(function(root, factory) {
+  if (typeof define === 'function' && define.amd) {
+    // AMD.
+    define(['expect.js', process.cwd()+'/src/index'], factory);
+  } else if (typeof module === 'object' && module.exports) {
+    // CommonJS-like environments that support module.exports, like Node.
+    factory(require('expect.js'), require(process.cwd()+'/src/index'));
+  } else {
+    // Browser globals (root is window)
+    factory(root.expect, root.OpenApiPetstore);
+  }
+}(this, function(expect, OpenApiPetstore) {
+  'use strict';
+
+  var instance;
+
+  beforeEach(function() {
+    instance = new OpenApiPetstore.Color();
+  });
+
+  var getProperty = function(object, getter, property) {
+    // Use getter method if present; otherwise, get the property directly.
+    if (typeof object[getter] === 'function')
+      return object[getter]();
+    else
+      return object[property];
+  }
+
+  var setProperty = function(object, setter, property, value) {
+    // Use setter method if present; otherwise, set the property directly.
+    if (typeof object[setter] === 'function')
+      object[setter](value);
+    else
+      object[property] = value;
+  }
+
+  describe('Color', function() {
+    it('should create an instance of Color', function() {
+      // uncomment below and update the code to test Color
+      //var instance = new OpenApiPetstore.Color();
+      //expect(instance).to.be.a(OpenApiPetstore.Color);
+    });
+
+  });
+
+}));

samples/client/petstore/javascript-apollo/test/model/DanishPig.spec.js

@@ -0,0 +1,71 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+(function(root, factory) {
+  if (typeof define === 'function' && define.amd) {
+    // AMD.
+    define(['expect.js', process.cwd()+'/src/index'], factory);
+  } else if (typeof module === 'object' && module.exports) {
+    // CommonJS-like environments that support module.exports, like Node.
+    factory(require('expect.js'), require(process.cwd()+'/src/index'));
+  } else {
+    // Browser globals (root is window)
+    factory(root.expect, root.OpenApiPetstore);
+  }
+}(this, function(expect, OpenApiPetstore) {
+  'use strict';
+
+  var instance;
+
+  beforeEach(function() {
+    instance = new OpenApiPetstore.DanishPig();
+  });
+
+  var getProperty = function(object, getter, property) {
+    // Use getter method if present; otherwise, get the property directly.
+    if (typeof object[getter] === 'function')
+      return object[getter]();
+    else
+      return object[property];
+  }
+
+  var setProperty = function(object, setter, property, value) {
+    // Use setter method if present; otherwise, set the property directly.
+    if (typeof object[setter] === 'function')
+      object[setter](value);
+    else
+      object[property] = value;
+  }
+
+  describe('DanishPig', function() {
+    it('should create an instance of DanishPig', function() {
+      // uncomment below and update the code to test DanishPig
+      //var instance = new OpenApiPetstore.DanishPig();
+      //expect(instance).to.be.a(OpenApiPetstore.DanishPig);
+    });
+
+    it('should have the property className (base name: "className")', function() {
+      // uncomment below and update the code to test the property className
+      //var instance = new OpenApiPetstore.DanishPig();
+      //expect(instance).to.be();
+    });
+
+    it('should have the property size (base name: "size")', function() {
+      // uncomment below and update the code to test the property size
+      //var instance = new OpenApiPetstore.DanishPig();
+      //expect(instance).to.be();
+    });
+
+  });
+
+}));

samples/client/petstore/javascript-apollo/test/model/NestedColor.spec.js

@@ -0,0 +1,71 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+(function(root, factory) {
+  if (typeof define === 'function' && define.amd) {
+    // AMD.
+    define(['expect.js', process.cwd()+'/src/index'], factory);
+  } else if (typeof module === 'object' && module.exports) {
+    // CommonJS-like environments that support module.exports, like Node.
+    factory(require('expect.js'), require(process.cwd()+'/src/index'));
+  } else {
+    // Browser globals (root is window)
+    factory(root.expect, root.OpenApiPetstore);
+  }
+}(this, function(expect, OpenApiPetstore) {
+  'use strict';
+
+  var instance;
+
+  beforeEach(function() {
+    instance = new OpenApiPetstore.NestedColor();
+  });
+
+  var getProperty = function(object, getter, property) {
+    // Use getter method if present; otherwise, get the property directly.
+    if (typeof object[getter] === 'function')
+      return object[getter]();
+    else
+      return object[property];
+  }
+
+  var setProperty = function(object, setter, property, value) {
+    // Use setter method if present; otherwise, set the property directly.
+    if (typeof object[setter] === 'function')
+      object[setter](value);
+    else
+      object[property] = value;
+  }
+
+  describe('NestedColor', function() {
+    it('should create an instance of NestedColor', function() {
+      // uncomment below and update the code to test NestedColor
+      //var instance = new OpenApiPetstore.NestedColor();
+      //expect(instance).to.be.a(OpenApiPetstore.NestedColor);
+    });
+
+    it('should have the property size (base name: "size")', function() {
+      // uncomment below and update the code to test the property size
+      //var instance = new OpenApiPetstore.NestedColor();
+      //expect(instance).to.be();
+    });
+
+    it('should have the property nested (base name: "nested")', function() {
+      // uncomment below and update the code to test the property nested
+      //var instance = new OpenApiPetstore.NestedColor();
+      //expect(instance).to.be();
+    });
+
+  });
+
+}));

samples/client/petstore/javascript-apollo/test/model/NestedOneOf.spec.js

@@ -0,0 +1,71 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+(function(root, factory) {
+  if (typeof define === 'function' && define.amd) {
+    // AMD.
+    define(['expect.js', process.cwd()+'/src/index'], factory);
+  } else if (typeof module === 'object' && module.exports) {
+    // CommonJS-like environments that support module.exports, like Node.
+    factory(require('expect.js'), require(process.cwd()+'/src/index'));
+  } else {
+    // Browser globals (root is window)
+    factory(root.expect, root.OpenApiPetstore);
+  }
+}(this, function(expect, OpenApiPetstore) {
+  'use strict';
+
+  var instance;
+
+  beforeEach(function() {
+    instance = new OpenApiPetstore.NestedOneOf();
+  });
+
+  var getProperty = function(object, getter, property) {
+    // Use getter method if present; otherwise, get the property directly.
+    if (typeof object[getter] === 'function')
+      return object[getter]();
+    else
+      return object[property];
+  }
+
+  var setProperty = function(object, setter, property, value) {
+    // Use setter method if present; otherwise, set the property directly.
+    if (typeof object[setter] === 'function')
+      object[setter](value);
+    else
+      object[property] = value;
+  }
+
+  describe('NestedOneOf', function() {
+    it('should create an instance of NestedOneOf', function() {
+      // uncomment below and update the code to test NestedOneOf
+      //var instance = new OpenApiPetstore.NestedOneOf();
+      //expect(instance).to.be.a(OpenApiPetstore.NestedOneOf);
+    });
+
+    it('should have the property size (base name: "size")', function() {
+      // uncomment below and update the code to test the property size
+      //var instance = new OpenApiPetstore.NestedOneOf();
+      //expect(instance).to.be();
+    });
+
+    it('should have the property nestedPig (base name: "nested_pig")', function() {
+      // uncomment below and update the code to test the property nestedPig
+      //var instance = new OpenApiPetstore.NestedOneOf();
+      //expect(instance).to.be();
+    });
+
+  });
+
+}));

samples/client/petstore/javascript-apollo/test/model/Pig.spec.js

@@ -0,0 +1,77 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+(function(root, factory) {
+  if (typeof define === 'function' && define.amd) {
+    // AMD.
+    define(['expect.js', process.cwd()+'/src/index'], factory);
+  } else if (typeof module === 'object' && module.exports) {
+    // CommonJS-like environments that support module.exports, like Node.
+    factory(require('expect.js'), require(process.cwd()+'/src/index'));
+  } else {
+    // Browser globals (root is window)
+    factory(root.expect, root.OpenApiPetstore);
+  }
+}(this, function(expect, OpenApiPetstore) {
+  'use strict';
+
+  var instance;
+
+  beforeEach(function() {
+    instance = new OpenApiPetstore.Pig();
+  });
+
+  var getProperty = function(object, getter, property) {
+    // Use getter method if present; otherwise, get the property directly.
+    if (typeof object[getter] === 'function')
+      return object[getter]();
+    else
+      return object[property];
+  }
+
+  var setProperty = function(object, setter, property, value) {
+    // Use setter method if present; otherwise, set the property directly.
+    if (typeof object[setter] === 'function')
+      object[setter](value);
+    else
+      object[property] = value;
+  }
+
+  describe('Pig', function() {
+    it('should create an instance of Pig', function() {
+      // uncomment below and update the code to test Pig
+      //var instance = new OpenApiPetstore.Pig();
+      //expect(instance).to.be.a(OpenApiPetstore.Pig);
+    });
+
+    it('should have the property className (base name: "className")', function() {
+      // uncomment below and update the code to test the property className
+      //var instance = new OpenApiPetstore.Pig();
+      //expect(instance).to.be();
+    });
+
+    it('should have the property color (base name: "color")', function() {
+      // uncomment below and update the code to test the property color
+      //var instance = new OpenApiPetstore.Pig();
+      //expect(instance).to.be();
+    });
+
+    it('should have the property size (base name: "size")', function() {
+      // uncomment below and update the code to test the property size
+      //var instance = new OpenApiPetstore.Pig();
+      //expect(instance).to.be();
+    });
+
+  });
+
+}));

samples/client/petstore/javascript-es6/.openapi-generator/FILES

@@ -9,12 +9,15 @@ docs/ApiResponse.md
 docs/ArrayOfArrayOfNumberOnly.md
 docs/ArrayOfNumberOnly.md
 docs/ArrayTest.md
+docs/BasquePig.md
 docs/Capitalization.md
 docs/Cat.md
 docs/CatAllOf.md
 docs/Category.md
 docs/ClassModel.md
 docs/Client.md
+docs/Color.md
+docs/DanishPig.md
 docs/DefaultApi.md
 docs/DeprecatedObject.md
 docs/Dog.md
@@ -36,6 +39,8 @@ docs/MapTest.md
 docs/MixedPropertiesAndAdditionalPropertiesClass.md
 docs/Model200Response.md
 docs/Name.md
+docs/NestedColor.md
+docs/NestedOneOf.md
 docs/NullableClass.md
 docs/NumberOnly.md
 docs/ObjectWithDeprecatedFields.md
@@ -48,6 +53,7 @@ docs/OuterEnumIntegerDefaultValue.md
 docs/OuterObjectWithEnumProperty.md
 docs/Pet.md
 docs/PetApi.md
+docs/Pig.md
 docs/ReadOnlyFirst.md
 docs/Return.md
 docs/SpecialModelName.md
@@ -73,12 +79,15 @@ src/model/ApiResponse.js
 src/model/ArrayOfArrayOfNumberOnly.js
 src/model/ArrayOfNumberOnly.js
 src/model/ArrayTest.js
+src/model/BasquePig.js
 src/model/Capitalization.js
 src/model/Cat.js
 src/model/CatAllOf.js
 src/model/Category.js
 src/model/ClassModel.js
 src/model/Client.js
+src/model/Color.js
+src/model/DanishPig.js
 src/model/DeprecatedObject.js
 src/model/Dog.js
 src/model/DogAllOf.js
@@ -97,6 +106,8 @@ src/model/MapTest.js
 src/model/MixedPropertiesAndAdditionalPropertiesClass.js
 src/model/Model200Response.js
 src/model/Name.js
+src/model/NestedColor.js
+src/model/NestedOneOf.js
 src/model/NullableClass.js
 src/model/NumberOnly.js
 src/model/ObjectWithDeprecatedFields.js
@@ -108,6 +119,7 @@ src/model/OuterEnumInteger.js
 src/model/OuterEnumIntegerDefaultValue.js
 src/model/OuterObjectWithEnumProperty.js
 src/model/Pet.js
+src/model/Pig.js
 src/model/ReadOnlyFirst.js
 src/model/Return.js
 src/model/SpecialModelName.js

samples/client/petstore/javascript-es6/README.md

@@ -171,12 +171,15 @@ Class | Method | HTTP request | Description
  - [OpenApiPetstore.ArrayOfArrayOfNumberOnly](docs/ArrayOfArrayOfNumberOnly.md)
  - [OpenApiPetstore.ArrayOfNumberOnly](docs/ArrayOfNumberOnly.md)
  - [OpenApiPetstore.ArrayTest](docs/ArrayTest.md)
+ - [OpenApiPetstore.BasquePig](docs/BasquePig.md)
  - [OpenApiPetstore.Capitalization](docs/Capitalization.md)
  - [OpenApiPetstore.Cat](docs/Cat.md)
  - [OpenApiPetstore.CatAllOf](docs/CatAllOf.md)
  - [OpenApiPetstore.Category](docs/Category.md)
  - [OpenApiPetstore.ClassModel](docs/ClassModel.md)
  - [OpenApiPetstore.Client](docs/Client.md)
+ - [OpenApiPetstore.Color](docs/Color.md)
+ - [OpenApiPetstore.DanishPig](docs/DanishPig.md)
  - [OpenApiPetstore.DeprecatedObject](docs/DeprecatedObject.md)
  - [OpenApiPetstore.Dog](docs/Dog.md)
  - [OpenApiPetstore.DogAllOf](docs/DogAllOf.md)
@@ -195,6 +198,8 @@ Class | Method | HTTP request | Description
  - [OpenApiPetstore.MixedPropertiesAndAdditionalPropertiesClass](docs/MixedPropertiesAndAdditionalPropertiesClass.md)
  - [OpenApiPetstore.Model200Response](docs/Model200Response.md)
  - [OpenApiPetstore.Name](docs/Name.md)
+ - [OpenApiPetstore.NestedColor](docs/NestedColor.md)
+ - [OpenApiPetstore.NestedOneOf](docs/NestedOneOf.md)
  - [OpenApiPetstore.NullableClass](docs/NullableClass.md)
  - [OpenApiPetstore.NumberOnly](docs/NumberOnly.md)
  - [OpenApiPetstore.ObjectWithDeprecatedFields](docs/ObjectWithDeprecatedFields.md)
@@ -206,6 +211,7 @@ Class | Method | HTTP request | Description
  - [OpenApiPetstore.OuterEnumIntegerDefaultValue](docs/OuterEnumIntegerDefaultValue.md)
  - [OpenApiPetstore.OuterObjectWithEnumProperty](docs/OuterObjectWithEnumProperty.md)
  - [OpenApiPetstore.Pet](docs/Pet.md)
+ - [OpenApiPetstore.Pig](docs/Pig.md)
  - [OpenApiPetstore.ReadOnlyFirst](docs/ReadOnlyFirst.md)
  - [OpenApiPetstore.Return](docs/Return.md)
  - [OpenApiPetstore.SpecialModelName](docs/SpecialModelName.md)

samples/client/petstore/javascript-es6/docs/BasquePig.md

@@ -0,0 +1,10 @@
+# OpenApiPetstore.BasquePig
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**className** | **String** |  | 
+**color** | **String** |  | 
+
+

samples/client/petstore/javascript-es6/docs/Color.md

@@ -0,0 +1,8 @@
+# OpenApiPetstore.Color
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+

samples/client/petstore/javascript-es6/docs/DanishPig.md

@@ -0,0 +1,10 @@
+# OpenApiPetstore.DanishPig
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**className** | **String** |  | 
+**size** | **Number** |  | 
+
+

samples/client/petstore/javascript-es6/docs/NestedColor.md

@@ -0,0 +1,10 @@
+# OpenApiPetstore.NestedColor
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**size** | **Number** |  | [optional] 
+**nested** | [**Color**](Color.md) |  | [optional] 
+
+

samples/client/petstore/javascript-es6/docs/NestedOneOf.md

@@ -0,0 +1,10 @@
+# OpenApiPetstore.NestedOneOf
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**size** | **Number** |  | [optional] 
+**nestedPig** | [**Pig**](Pig.md) |  | [optional] 
+
+

samples/client/petstore/javascript-es6/docs/Pig.md

@@ -0,0 +1,11 @@
+# OpenApiPetstore.Pig
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**className** | **String** |  | 
+**color** | **String** |  | 
+**size** | **Number** |  | 
+
+

samples/client/petstore/javascript-es6/src/index.js

@@ -19,12 +19,15 @@ import ApiResponse from './model/ApiResponse';
 import ArrayOfArrayOfNumberOnly from './model/ArrayOfArrayOfNumberOnly';
 import ArrayOfNumberOnly from './model/ArrayOfNumberOnly';
 import ArrayTest from './model/ArrayTest';
+import BasquePig from './model/BasquePig';
 import Capitalization from './model/Capitalization';
 import Cat from './model/Cat';
 import CatAllOf from './model/CatAllOf';
 import Category from './model/Category';
 import ClassModel from './model/ClassModel';
 import Client from './model/Client';
+import Color from './model/Color';
+import DanishPig from './model/DanishPig';
 import DeprecatedObject from './model/DeprecatedObject';
 import Dog from './model/Dog';
 import DogAllOf from './model/DogAllOf';
@@ -43,6 +46,8 @@ import MapTest from './model/MapTest';
 import MixedPropertiesAndAdditionalPropertiesClass from './model/MixedPropertiesAndAdditionalPropertiesClass';
 import Model200Response from './model/Model200Response';
 import Name from './model/Name';
+import NestedColor from './model/NestedColor';
+import NestedOneOf from './model/NestedOneOf';
 import NullableClass from './model/NullableClass';
 import NumberOnly from './model/NumberOnly';
 import ObjectWithDeprecatedFields from './model/ObjectWithDeprecatedFields';
@@ -54,6 +59,7 @@ import OuterEnumInteger from './model/OuterEnumInteger';
 import OuterEnumIntegerDefaultValue from './model/OuterEnumIntegerDefaultValue';
 import OuterObjectWithEnumProperty from './model/OuterObjectWithEnumProperty';
 import Pet from './model/Pet';
+import Pig from './model/Pig';
 import ReadOnlyFirst from './model/ReadOnlyFirst';
 import Return from './model/Return';
 import SpecialModelName from './model/SpecialModelName';
@@ -142,6 +148,12 @@ export {
      */
     ArrayTest,
 
+    /**
+     * The BasquePig model constructor.
+     * @property {module:model/BasquePig}
+     */
+    BasquePig,
+
     /**
      * The Capitalization model constructor.
      * @property {module:model/Capitalization}
@@ -178,6 +190,18 @@ export {
      */
     Client,
 
+    /**
+     * The Color model constructor.
+     * @property {module:model/Color}
+     */
+    Color,
+
+    /**
+     * The DanishPig model constructor.
+     * @property {module:model/DanishPig}
+     */
+    DanishPig,
+
     /**
      * The DeprecatedObject model constructor.
      * @property {module:model/DeprecatedObject}
@@ -286,6 +310,18 @@ export {
      */
     Name,
 
+    /**
+     * The NestedColor model constructor.
+     * @property {module:model/NestedColor}
+     */
+    NestedColor,
+
+    /**
+     * The NestedOneOf model constructor.
+     * @property {module:model/NestedOneOf}
+     */
+    NestedOneOf,
+
     /**
      * The NullableClass model constructor.
      * @property {module:model/NullableClass}
@@ -352,6 +388,12 @@ export {
      */
     Pet,
 
+    /**
+     * The Pig model constructor.
+     * @property {module:model/Pig}
+     */
+    Pig,
+
     /**
      * The ReadOnlyFirst model constructor.
      * @property {module:model/ReadOnlyFirst}

samples/client/petstore/javascript-es6/src/model/AdditionalPropertiesClass.js

@@ -57,9 +57,21 @@ class AdditionalPropertiesClass {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>AdditionalPropertiesClass</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>AdditionalPropertiesClass</code>.
+     */
+    static validateJSON(data) {
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Object.<String, String>} map_property
  */

samples/client/petstore/javascript-es6/src/model/Animal.js

@@ -59,9 +59,35 @@ class Animal {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Animal</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Animal</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of Animal.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['className'] && !(typeof data['className'] === 'string' || data['className'] instanceof String)) {
+            throw new Error("Expected the field `className` to be a primitive type in the JSON string but got " + data['className']);
+        }
+        // ensure the json data is a string
+        if (data['color'] && !(typeof data['color'] === 'string' || data['color'] instanceof String)) {
+            throw new Error("Expected the field `color` to be a primitive type in the JSON string but got " + data['color']);
+        }
+
+        return true;
+    }
+
 
 }
 
+Animal.RequiredProperties = ["className"];
+
 /**
  * @member {String} className
  */

samples/client/petstore/javascript-es6/src/model/ApiResponse.js

@@ -60,9 +60,29 @@ class ApiResponse {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ApiResponse</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ApiResponse</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['type'] && !(typeof data['type'] === 'string' || data['type'] instanceof String)) {
+            throw new Error("Expected the field `type` to be a primitive type in the JSON string but got " + data['type']);
+        }
+        // ensure the json data is a string
+        if (data['message'] && !(typeof data['message'] === 'string' || data['message'] instanceof String)) {
+            throw new Error("Expected the field `message` to be a primitive type in the JSON string but got " + data['message']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Number} code
  */

samples/client/petstore/javascript-es6/src/model/ArrayOfArrayOfNumberOnly.js

@@ -54,9 +54,25 @@ class ArrayOfArrayOfNumberOnly {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ArrayOfArrayOfNumberOnly</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ArrayOfArrayOfNumberOnly</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is an array
+        if (!Array.isArray(data['ArrayArrayNumber'])) {
+            throw new Error("Expected the field `ArrayArrayNumber` to be an array in the JSON data but got " + data['ArrayArrayNumber']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Array.<Array.<Number>>} ArrayArrayNumber
  */

samples/client/petstore/javascript-es6/src/model/ArrayOfNumberOnly.js

@@ -54,9 +54,25 @@ class ArrayOfNumberOnly {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ArrayOfNumberOnly</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ArrayOfNumberOnly</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is an array
+        if (!Array.isArray(data['ArrayNumber'])) {
+            throw new Error("Expected the field `ArrayNumber` to be an array in the JSON data but got " + data['ArrayNumber']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Array.<Number>} ArrayNumber
  */

samples/client/petstore/javascript-es6/src/model/ArrayTest.js

@@ -61,9 +61,33 @@ class ArrayTest {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ArrayTest</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ArrayTest</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_of_string'])) {
+            throw new Error("Expected the field `array_of_string` to be an array in the JSON data but got " + data['array_of_string']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_array_of_integer'])) {
+            throw new Error("Expected the field `array_array_of_integer` to be an array in the JSON data but got " + data['array_array_of_integer']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_array_of_model'])) {
+            throw new Error("Expected the field `array_array_of_model` to be an array in the JSON data but got " + data['array_array_of_model']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Array.<String>} array_of_string
  */

samples/client/petstore/javascript-es6/src/model/BasquePig.js

@@ -0,0 +1,109 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+import ApiClient from '../ApiClient';
+
+/**
+ * The BasquePig model module.
+ * @module model/BasquePig
+ * @version 1.0.0
+ */
+class BasquePig {
+    /**
+     * Constructs a new <code>BasquePig</code>.
+     * @alias module:model/BasquePig
+     * @param className {String} 
+     * @param color {String} 
+     */
+    constructor(className, color) { 
+        
+        BasquePig.initialize(this, className, color);
+    }
+
+    /**
+     * Initializes the fields of this object.
+     * This method is used by the constructors of any subclasses, in order to implement multiple inheritance (mix-ins).
+     * Only for internal use.
+     */
+    static initialize(obj, className, color) { 
+        obj['className'] = className;
+        obj['color'] = color;
+    }
+
+    /**
+     * Constructs a <code>BasquePig</code> from a plain JavaScript object, optionally creating a new instance.
+     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @param {module:model/BasquePig} obj Optional instance to populate.
+     * @return {module:model/BasquePig} The populated <code>BasquePig</code> instance.
+     */
+    static constructFromObject(data, obj) {
+        if (data) {
+            obj = obj || new BasquePig();
+
+            if (data.hasOwnProperty('className')) {
+                obj['className'] = ApiClient.convertToType(data['className'], 'String');
+            }
+            if (data.hasOwnProperty('color')) {
+                obj['color'] = ApiClient.convertToType(data['color'], 'String');
+            }
+        }
+        return obj;
+    }
+
+    /**
+     * Validates the JSON data with respect to <code>BasquePig</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>BasquePig</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of BasquePig.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['className'] && !(typeof data['className'] === 'string' || data['className'] instanceof String)) {
+            throw new Error("Expected the field `className` to be a primitive type in the JSON string but got " + data['className']);
+        }
+        // ensure the json data is a string
+        if (data['color'] && !(typeof data['color'] === 'string' || data['color'] instanceof String)) {
+            throw new Error("Expected the field `color` to be a primitive type in the JSON string but got " + data['color']);
+        }
+
+        return true;
+    }
+
+
+}
+
+BasquePig.RequiredProperties = ["className", "color"];
+
+/**
+ * @member {String} className
+ */
+BasquePig.prototype['className'] = undefined;
+
+/**
+ * @member {String} color
+ */
+BasquePig.prototype['color'] = undefined;
+
+
+
+
+
+
+export default BasquePig;
+

samples/client/petstore/javascript-es6/src/model/Capitalization.js

@@ -69,9 +69,45 @@ class Capitalization {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Capitalization</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Capitalization</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['smallCamel'] && !(typeof data['smallCamel'] === 'string' || data['smallCamel'] instanceof String)) {
+            throw new Error("Expected the field `smallCamel` to be a primitive type in the JSON string but got " + data['smallCamel']);
+        }
+        // ensure the json data is a string
+        if (data['CapitalCamel'] && !(typeof data['CapitalCamel'] === 'string' || data['CapitalCamel'] instanceof String)) {
+            throw new Error("Expected the field `CapitalCamel` to be a primitive type in the JSON string but got " + data['CapitalCamel']);
+        }
+        // ensure the json data is a string
+        if (data['small_Snake'] && !(typeof data['small_Snake'] === 'string' || data['small_Snake'] instanceof String)) {
+            throw new Error("Expected the field `small_Snake` to be a primitive type in the JSON string but got " + data['small_Snake']);
+        }
+        // ensure the json data is a string
+        if (data['Capital_Snake'] && !(typeof data['Capital_Snake'] === 'string' || data['Capital_Snake'] instanceof String)) {
+            throw new Error("Expected the field `Capital_Snake` to be a primitive type in the JSON string but got " + data['Capital_Snake']);
+        }
+        // ensure the json data is a string
+        if (data['SCA_ETH_Flow_Points'] && !(typeof data['SCA_ETH_Flow_Points'] === 'string' || data['SCA_ETH_Flow_Points'] instanceof String)) {
+            throw new Error("Expected the field `SCA_ETH_Flow_Points` to be a primitive type in the JSON string but got " + data['SCA_ETH_Flow_Points']);
+        }
+        // ensure the json data is a string
+        if (data['ATT_NAME'] && !(typeof data['ATT_NAME'] === 'string' || data['ATT_NAME'] instanceof String)) {
+            throw new Error("Expected the field `ATT_NAME` to be a primitive type in the JSON string but got " + data['ATT_NAME']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} smallCamel
  */

samples/client/petstore/javascript-es6/src/model/Cat.js

@@ -63,9 +63,27 @@ class Cat {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Cat</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Cat</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of Cat.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+
+        return true;
+    }
+
 
 }
 
+Cat.RequiredProperties = ["className"];
+
 /**
  * @member {Boolean} declawed
  */

samples/client/petstore/javascript-es6/src/model/CatAllOf.js

@@ -54,9 +54,21 @@ class CatAllOf {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>CatAllOf</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>CatAllOf</code>.
+     */
+    static validateJSON(data) {
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {Boolean} declawed
  */

samples/client/petstore/javascript-es6/src/model/Category.js

@@ -59,9 +59,31 @@ class Category {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Category</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Category</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of Category.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['name'] && !(typeof data['name'] === 'string' || data['name'] instanceof String)) {
+            throw new Error("Expected the field `name` to be a primitive type in the JSON string but got " + data['name']);
+        }
+
+        return true;
+    }
+
 
 }
 
+Category.RequiredProperties = ["name"];
+
 /**
  * @member {Number} id
  */

samples/client/petstore/javascript-es6/src/model/ClassModel.js

@@ -55,9 +55,25 @@ class ClassModel {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>ClassModel</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>ClassModel</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['_class'] && !(typeof data['_class'] === 'string' || data['_class'] instanceof String)) {
+            throw new Error("Expected the field `_class` to be a primitive type in the JSON string but got " + data['_class']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} _class
  */

samples/client/petstore/javascript-es6/src/model/Client.js

@@ -54,9 +54,25 @@ class Client {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Client</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Client</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['client'] && !(typeof data['client'] === 'string' || data['client'] instanceof String)) {
+            throw new Error("Expected the field `client` to be a primitive type in the JSON string but got " + data['client']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} client
  */

samples/client/petstore/javascript-es6/src/model/Color.js

@@ -0,0 +1,154 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+import ApiClient from '../ApiClient';
+
+/**
+ * The Color model module.
+ * @module model/Color
+ * @version 1.0.0
+ */
+class Color {
+    /**
+     * Constructs a new <code>Color</code>.
+     * RGB array, RGBA array, or hex string.
+     * @alias module:model/Color
+     * @param {(module:model/String|module:model/[Number])} The actual instance to initialize Color.
+     */
+    constructor(obj = null) {
+        this.actualInstance = obj;
+    }
+
+    /**
+     * Constructs a <code>Color</code> from a plain JavaScript object, optionally creating a new instance.
+     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @param {module:model/Color} obj Optional instance to populate.
+     * @return {module:model/Color} The populated <code>Color</code> instance.
+     */
+    static constructFromObject(data, obj) {
+        if (!data) {
+            return new Color();
+        }
+        var match = 0;
+        var errorMessages = [];
+        // RGB three element array with values 0-255.
+        try {
+            // validate array data type
+            if (!Array.isArray(data)) {
+                throw new Error("Invalid data type. Expecting array. Data: " + data);
+            }
+            if (data.length > 3 || data.length < 3) {
+                throw new Error("Invalid array size. Minimim: 3. Maximum: 3. Data: " + data);
+            }
+            // validate array of integer
+            for (const item of data) {
+                if (!(typeof item === 'number' && item % 1 === 0)) {
+                    throw new Error("Invalid array items. Must be integer. Data: " + data);
+                }
+                if (item > 255 || item < 0) {
+                    throw new Error("Invalid integer value in an array items. Max.: 255. Min.: 0. Data: " + data);
+                }
+            }
+            obj = new Color(data);
+            match++;
+        } catch(err) {
+            // json data failed to deserialize into [Number]
+            errorMessages.push("Failed to construct [Number]: " + err)
+        }
+
+        // RGBA four element array with values 0-255.
+        try {
+            // validate array data type
+            if (!Array.isArray(data)) {
+                throw new Error("Invalid data type. Expecting array. Data: " + data);
+            }
+            if (data.length > 4 || data.length < 4) {
+                throw new Error("Invalid array size. Minimim: 4. Maximum: 4. Data: " + data);
+            }
+            // validate array of integer
+            for (const item of data) {
+                if (!(typeof item === 'number' && item % 1 === 0)) {
+                    throw new Error("Invalid array items. Must be integer. Data: " + data);
+                }
+                if (item > 255 || item < 0) {
+                    throw new Error("Invalid integer value in an array items. Max.: 255. Min.: 0. Data: " + data);
+                }
+            }
+            obj = new Color(data);
+            match++;
+        } catch(err) {
+            // json data failed to deserialize into [Number]
+            errorMessages.push("Failed to construct [Number]: " + err)
+        }
+
+        // Hex color string, such as #00FF00.
+        try {
+            // validate array of string
+            if (!(typeof data === 'string')) {
+                throw new Error("Invalid data. Must be string. Data: " + JSON.stringify(data));
+            }
+            if (!/^#(?:[0-9a-fA-F]{3}){1,2}$/.test(data)) {
+                throw new Error("Invalid string value in an array items. Must conform to /^#(?:[0-9a-fA-F]{3}){1,2}$/. Data: " + JSON.stringify(data));
+            }
+            if (data.length > 7 && data.length < 7) {
+                throw new Error("Invalid string value in an array items. Max. length: 7. Min. length: 7. Data: " + JSON.stringify(data));
+            }
+            obj = new Color(data);
+            match++;
+        } catch(err) {
+            // json data failed to deserialize into String
+            errorMessages.push("Failed to construct String: " + err)
+        }
+
+        if (match > 1) {
+            throw new Error("Multiple matches found constructing `Color` with oneOf schemas String, [Number]. JSON data: " + JSON.stringify(data));
+        } else if (match === 0) {
+            throw new Error("No match found constructing `Color` with oneOf schemas String, [Number]. Details: " +
+                            errorMessages.join(", "));
+        } else { // only 1 match
+            return obj;
+        }
+    }
+
+    /**
+     * Gets the actaul instance, which can be <code>String</code>, <code>[Number]</code>.
+     * @return {(module:model/String|module:model/[Number])} The actual instance.
+     */
+    getActualInstance() {
+        return this.actualInstance;
+    }
+
+    /**
+     * Sets the actaul instance, which can be <code>String</code>, <code>[Number]</code>.
+     * @param {(module:model/String|module:model/[Number])} obj The actual instance.
+     */
+    setActualInstance(obj) {
+       this.actualInstance = Color.constructFromObject(obj).getActualInstance();
+    }
+
+    /**
+     * Returns the JSON representation of the actual intance.
+     * @return {string}
+     */
+    toJSON = function(){
+        return this.getActualInstance();
+    }
+
+}
+
+
+Color.OneOf = ["String", "[Number]"];
+
+export default Color;
+

samples/client/petstore/javascript-es6/src/model/DanishPig.js

@@ -0,0 +1,105 @@
+/**
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ *
+ */
+
+import ApiClient from '../ApiClient';
+
+/**
+ * The DanishPig model module.
+ * @module model/DanishPig
+ * @version 1.0.0
+ */
+class DanishPig {
+    /**
+     * Constructs a new <code>DanishPig</code>.
+     * @alias module:model/DanishPig
+     * @param className {String} 
+     * @param size {Number} 
+     */
+    constructor(className, size) { 
+        
+        DanishPig.initialize(this, className, size);
+    }
+
+    /**
+     * Initializes the fields of this object.
+     * This method is used by the constructors of any subclasses, in order to implement multiple inheritance (mix-ins).
+     * Only for internal use.
+     */
+    static initialize(obj, className, size) { 
+        obj['className'] = className;
+        obj['size'] = size;
+    }
+
+    /**
+     * Constructs a <code>DanishPig</code> from a plain JavaScript object, optionally creating a new instance.
+     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @param {module:model/DanishPig} obj Optional instance to populate.
+     * @return {module:model/DanishPig} The populated <code>DanishPig</code> instance.
+     */
+    static constructFromObject(data, obj) {
+        if (data) {
+            obj = obj || new DanishPig();
+
+            if (data.hasOwnProperty('className')) {
+                obj['className'] = ApiClient.convertToType(data['className'], 'String');
+            }
+            if (data.hasOwnProperty('size')) {
+                obj['size'] = ApiClient.convertToType(data['size'], 'Number');
+            }
+        }
+        return obj;
+    }
+
+    /**
+     * Validates the JSON data with respect to <code>DanishPig</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>DanishPig</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of DanishPig.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['className'] && !(typeof data['className'] === 'string' || data['className'] instanceof String)) {
+            throw new Error("Expected the field `className` to be a primitive type in the JSON string but got " + data['className']);
+        }
+
+        return true;
+    }
+
+
+}
+
+DanishPig.RequiredProperties = ["className", "size"];
+
+/**
+ * @member {String} className
+ */
+DanishPig.prototype['className'] = undefined;
+
+/**
+ * @member {Number} size
+ */
+DanishPig.prototype['size'] = undefined;
+
+
+
+
+
+
+export default DanishPig;
+

samples/client/petstore/javascript-es6/src/model/DeprecatedObject.js

@@ -54,9 +54,25 @@ class DeprecatedObject {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>DeprecatedObject</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>DeprecatedObject</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['name'] && !(typeof data['name'] === 'string' || data['name'] instanceof String)) {
+            throw new Error("Expected the field `name` to be a primitive type in the JSON string but got " + data['name']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} name
  */

samples/client/petstore/javascript-es6/src/model/Dog.js

@@ -63,9 +63,31 @@ class Dog {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Dog</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Dog</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of Dog.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['breed'] && !(typeof data['breed'] === 'string' || data['breed'] instanceof String)) {
+            throw new Error("Expected the field `breed` to be a primitive type in the JSON string but got " + data['breed']);
+        }
+
+        return true;
+    }
+
 
 }
 
+Dog.RequiredProperties = ["className"];
+
 /**
  * @member {String} breed
  */

samples/client/petstore/javascript-es6/src/model/DogAllOf.js

@@ -54,9 +54,25 @@ class DogAllOf {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>DogAllOf</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>DogAllOf</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['breed'] && !(typeof data['breed'] === 'string' || data['breed'] instanceof String)) {
+            throw new Error("Expected the field `breed` to be a primitive type in the JSON string but got " + data['breed']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} breed
  */

samples/client/petstore/javascript-es6/src/model/EnumArrays.js

@@ -57,9 +57,29 @@ class EnumArrays {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>EnumArrays</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>EnumArrays</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['just_symbol'] && !(typeof data['just_symbol'] === 'string' || data['just_symbol'] instanceof String)) {
+            throw new Error("Expected the field `just_symbol` to be a primitive type in the JSON string but got " + data['just_symbol']);
+        }
+        // ensure the json data is an array
+        if (!Array.isArray(data['array_enum'])) {
+            throw new Error("Expected the field `array_enum` to be an array in the JSON data but got " + data['array_enum']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {module:model/EnumArrays.JustSymbolEnum} just_symbol
  */

samples/client/petstore/javascript-es6/src/model/EnumTest.js

@@ -81,9 +81,35 @@ class EnumTest {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>EnumTest</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>EnumTest</code>.
+     */
+    static validateJSON(data) {
+        // check to make sure all required properties are present in the JSON string
+        for (const property of EnumTest.RequiredProperties) {
+            if (!data[property]) {
+                throw new Error("The required field `" + property + "` is not found in the JSON data: " + JSON.stringify(data));
+            }
+        }
+        // ensure the json data is a string
+        if (data['enum_string'] && !(typeof data['enum_string'] === 'string' || data['enum_string'] instanceof String)) {
+            throw new Error("Expected the field `enum_string` to be a primitive type in the JSON string but got " + data['enum_string']);
+        }
+        // ensure the json data is a string
+        if (data['enum_string_required'] && !(typeof data['enum_string_required'] === 'string' || data['enum_string_required'] instanceof String)) {
+            throw new Error("Expected the field `enum_string_required` to be a primitive type in the JSON string but got " + data['enum_string_required']);
+        }
+
+        return true;
+    }
+
 
 }
 
+EnumTest.RequiredProperties = ["enum_string_required"];
+
 /**
  * @member {module:model/EnumTest.EnumStringEnum} enum_string
  */

samples/client/petstore/javascript-es6/src/model/File.js

@@ -55,9 +55,25 @@ class File {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>File</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>File</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['sourceURI'] && !(typeof data['sourceURI'] === 'string' || data['sourceURI'] instanceof String)) {
+            throw new Error("Expected the field `sourceURI` to be a primitive type in the JSON string but got " + data['sourceURI']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * Test capitalization
  * @member {String} sourceURI

samples/client/petstore/javascript-es6/src/model/FileSchemaTestClass.js

@@ -57,9 +57,35 @@ class FileSchemaTestClass {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>FileSchemaTestClass</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>FileSchemaTestClass</code>.
+     */
+    static validateJSON(data) {
+        // validate the optional field `file`
+        if (data['file']) { // data not null
+          File.validateJSON(data['file']);
+        }
+        if (data['files']) { // data not null
+            // ensure the json data is an array
+            if (!Array.isArray(data['files'])) {
+                throw new Error("Expected the field `files` to be an array in the JSON data but got " + data['files']);
+            }
+            // validate the optional field `files` (array)
+            for (const item of data['files']) {
+                File.validateJsonObject(item);
+            };
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {File} file
  */

samples/client/petstore/javascript-es6/src/model/Foo.js

@@ -54,9 +54,25 @@ class Foo {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>Foo</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>Foo</code>.
+     */
+    static validateJSON(data) {
+        // ensure the json data is a string
+        if (data['bar'] && !(typeof data['bar'] === 'string' || data['bar'] instanceof String)) {
+            throw new Error("Expected the field `bar` to be a primitive type in the JSON string but got " + data['bar']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {String} bar
  * @default 'bar'

samples/client/petstore/javascript-es6/src/model/FooGetDefaultResponse.js

@@ -55,9 +55,25 @@ class FooGetDefaultResponse {
         return obj;
     }
 
+    /**
+     * Validates the JSON data with respect to <code>FooGetDefaultResponse</code>.
+     * @param {Object} data The plain JavaScript object bearing properties of interest.
+     * @return {boolean} to indicate whether the JSON data is valid with respect to <code>FooGetDefaultResponse</code>.
+     */
+    static validateJSON(data) {
+        // validate the optional field `string`
+        if (data['string']) { // data not null
+          Foo.validateJSON(data['string']);
+        }
+
+        return true;
+    }
+
 
 }
 
+
+
 /**
  * @member {module:model/Foo} string
  */