feat: enable customization of additional property represenation

examples/README.md

@@ -47,10 +47,10 @@ These examples show a specific input and how they can be used:
 - [json-schema-draft6-from-object](./json-schema-draft6-from-object) - A basic example where a JSON Schema draft 6 JS object is used to generate models.
 - [json-schema-draft4-from-object](./json-schema-draft4-from-object) - A basic example where a JSON Schema draft 4 JS object is used to generate models.
 - [json-schema-single-enum-as-const](./json-schema-single-enum-as-const) - An advanced example that shows how to change how `enum` are interpreted when containing a single value.
+- [json-schema-additional-properties-representation](./json-schema-additional-properties-representation) - An advanced example that shows how to change the property name for additional properties
 - [swagger2.0-from-object](./swagger2.0-from-object) - A basic example where a Swagger 2.0 JS object is used to generate models.
 - [meta-model](./meta-model) - A basic example how to provide a meta model for the generator
 
-
 ## General examples
 These are examples that can be applied in all scenarios.
 - [include-custom-function](./include-custom-function) - A basic example where a custom function is included.

examples/json-schema-additional-properties-representation/README.md

@@ -0,0 +1,17 @@
+# JSON Schema change property name for additional properties
+
+This example shows how to use the `propertyNameForAdditionalProperties` option on the JSON Schema input processor to change the property name that is used for representing additional properties.
+
+## How to run this example
+
+Run this example using:
+
+```sh
+npm i && npm run start
+```
+
+If you are on Windows, use the `start:windows` script instead:
+
+```sh
+npm i && npm run start:windows
+```

examples/json-schema-additional-properties-representation/__snapshots__/index.spec.ts.snap

@@ -0,0 +1,24 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Should be able to render object with different additional property and should log expected output to console 1`] = `
+Array [
+  "class Root {
+  private _email?: string;
+  private _extensions?: Map<string, any>;
+
+  constructor(input: {
+    email?: string,
+    extensions?: Map<string, any>,
+  }) {
+    this._email = input.email;
+    this._extensions = input.extensions;
+  }
+
+  get email(): string | undefined { return this._email; }
+  set email(email: string | undefined) { this._email = email; }
+
+  get extensions(): Map<string, any> | undefined { return this._extensions; }
+  set extensions(extensions: Map<string, any> | undefined) { this._extensions = extensions; }
+}",
+]
+`;

examples/json-schema-additional-properties-representation/index.spec.ts

@@ -0,0 +1,15 @@
+const spy = jest.spyOn(global.console, 'log').mockImplementation(() => {
+  return;
+});
+import { generate } from './index';
+
+describe('Should be able to render object with different additional property', () => {
+  afterAll(() => {
+    jest.restoreAllMocks();
+  });
+  test('and should log expected output to console', async () => {
+    await generate();
+    expect(spy.mock.calls.length).toEqual(1);
+    expect(spy.mock.calls[0]).toMatchSnapshot();
+  });
+});

examples/json-schema-additional-properties-representation/index.ts

@@ -0,0 +1,29 @@
+import { TypeScriptGenerator } from '../../src';
+
+const generator = new TypeScriptGenerator({
+  processorOptions: {
+    jsonSchema: {
+      propertyNameForAdditionalProperties: 'extensions'
+    }
+  }
+});
+const jsonSchemaDraft7 = {
+  $schema: 'http://json-schema.org/draft-07/schema#',
+  type: 'object',
+  additionalProperties: true,
+  properties: {
+    email: {
+      type: 'string'
+    }
+  }
+};
+
+export async function generate(): Promise<void> {
+  const models = await generator.generate(jsonSchemaDraft7);
+  for (const model of models) {
+    console.log(model.result);
+  }
+}
+if (require.main === module) {
+  generate();
+}

examples/json-schema-additional-properties-representation/package.json

@@ -0,0 +1,10 @@
+{
+  "config" : { "example_name" : "json-schema-additional-properties-representation" },
+  "scripts": {
+    "install": "cd ../.. && npm i",
+    "start": "../../node_modules/.bin/ts-node --cwd ../../ ./examples/$npm_package_config_example_name/index.ts",
+    "start:windows": "..\\..\\node_modules\\.bin\\ts-node --cwd ..\\..\\ .\\examples\\%npm_package_config_example_name%\\index.ts",
+    "test": "../../node_modules/.bin/jest --config=../../jest.config.js ./examples/$npm_package_config_example_name/index.spec.ts",
+    "test:windows": "..\\..\\node_modules\\.bin\\jest --config=..\\..\\jest.config.js examples/%npm_package_config_example_name%/index.spec.ts"
+  }
+}

examples/json-schema-single-enum-as-const/__snapshots__/index.spec.ts.snap

@@ -1,6 +1,6 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`Should be able to render TEMPLATE and should log expected output to console 1`] = `
+exports[`Should be able to render enum with single value as const and should log expected output to console 1`] = `
 Array [
   "class Root {
   private _email?: 'test' = 'test';

examples/json-schema-single-enum-as-const/index.spec.ts

@@ -3,7 +3,7 @@ const spy = jest.spyOn(global.console, 'log').mockImplementation(() => {
 });
 import { generate } from './index';
 
-describe('Should be able to render TEMPLATE', () => {
+describe('Should be able to render enum with single value as const', () => {
   afterAll(() => {
     jest.restoreAllMocks();
   });

src/helpers/CommonModelToMetaModel.ts

@@ -582,7 +582,8 @@ export function convertToObjectModel(
     jsonSchemaModel.additionalProperties !== undefined ||
     jsonSchemaModel.patternProperties !== undefined
   ) {
-    let propertyName = 'additionalProperties';
+    let propertyName =
+      options.propertyNameForAdditionalProperties ?? 'additionalProperties';
     while (metaModel.properties[String(propertyName)] !== undefined) {
       propertyName = `reserved_${propertyName}`;
     }

src/processors/JsonSchemaInputProcessor.ts

@@ -23,14 +23,20 @@ export interface JsonSchemaProcessorOptions extends InterpreterOptions {
    * Use this option to reduce the number of enums being created and use constant values instead.
    */
   interpretSingleEnumAsConst?: boolean;
+
+  /**
+   * This option changes which property name that should be used to represent `additionalProperties` in JSON Schema
+   */
+  propertyNameForAdditionalProperties?: string;
 }
 
 export const defaultJsonSchemaProcessorOptions: JsonSchemaProcessorOptions = {
   allowInheritance: false,
   disableCache: false,
   ignoreAdditionalItems: false,
   ignoreAdditionalProperties: false,
-  interpretSingleEnumAsConst: false
+  interpretSingleEnumAsConst: false,
+  propertyNameForAdditionalProperties: 'additionalProperties'
 };
 
 /**