---
title: Documentation for the n4js Generator
---

## METADATA

| Property | Value | Notes |
| -------- | ----- | ----- |
| generator name | n4js | pass this to the generate command after -g |
| generator stability | BETA | |
| generator type | CLIENT | |
| generator language | Java | |
| generator default templating engine | mustache | |
| helpTxt | Generates a n4js client. | |

## CONFIG OPTIONS
These options may be applied as additional-properties (cli) or configOptions (plugins). Refer to [configuration docs](https://openapi-generator.tech/docs/configuration) for more details.

| Option | Description | Values | Default |
| ------ | ----------- | ------ | ------- |
|apiNamePrefix|Prefix that will be appended to all API names ('tags'). Default: empty string. e.g. Pet =&gt; Pet.| |null|
|apiPackage|package for generated api classes| |null|
|checkRequiredParamsNotNull|Iff true null-checks are performed for required parameters.| |null|
|checkSuperfluousBodyProps|Iff true a new copy of the given body object is transmitted. This copy only contains those properties defined in its model specification.| |null|
|generateDefaultApiExecuter|Iff true a default implementation of the api executer interface is generated.| |null|
|modelPackage|package for generated models| |null|

## IMPORT MAPPING

| Type/Alias | Imports |
| ---------- | ------- |


## INSTANTIATION TYPES

| Type/Alias | Instantiated By |
| ---------- | --------------- |


## LANGUAGE PRIMITIVES

<ul class="column-ul">
<li>Array</li>
<li>Error</li>
<li>Object</li>
<li>String</li>
<li>any</li>
<li>any+</li>
<li>boolean</li>
<li>int</li>
<li>number</li>
<li>object</li>
<li>string</li>
</ul>

## RESERVED WORDS

<ul class="column-ul">
<li>abstract</li>
<li>await</li>
<li>boolean</li>
<li>break</li>
<li>byte</li>
<li>case</li>
<li>catch</li>
<li>char</li>
<li>class</li>
<li>const</li>
<li>continue</li>
<li>debugger</li>
<li>default</li>
<li>delete</li>
<li>do</li>
<li>double</li>
<li>else</li>
<li>enum</li>
<li>export</li>
<li>extends</li>
<li>false</li>
<li>final</li>
<li>finally</li>
<li>float</li>
<li>for</li>
<li>formParams</li>
<li>function</li>
<li>goto</li>
<li>headerParams</li>
<li>if</li>
<li>implements</li>
<li>import</li>
<li>in</li>
<li>instanceof</li>
<li>int</li>
<li>interface</li>
<li>let</li>
<li>long</li>
<li>native</li>
<li>new</li>
<li>null</li>
<li>package</li>
<li>private</li>
<li>protected</li>
<li>public</li>
<li>queryParameters</li>
<li>requestOptions</li>
<li>return</li>
<li>short</li>
<li>static</li>
<li>super</li>
<li>switch</li>
<li>synchronized</li>
<li>this</li>
<li>throw</li>
<li>transient</li>
<li>true</li>
<li>try</li>
<li>typeof</li>
<li>useFormData</li>
<li>var</li>
<li>varLocalDeferred</li>
<li>varLocalPath</li>
<li>void</li>
<li>volatile</li>
<li>while</li>
<li>with</li>
<li>yield</li>
</ul>

## FEATURE SET


### Client Modification Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|BasePath|✗|ToolingExtension
|Authorizations|✗|ToolingExtension
|UserAgent|✗|ToolingExtension
|MockServer|✗|ToolingExtension

### Data Type Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Custom|✗|OAS2,OAS3
|Int32|✓|OAS2,OAS3
|Int64|✓|OAS2,OAS3
|Float|✓|OAS2,OAS3
|Double|✓|OAS2,OAS3
|Decimal|✓|ToolingExtension
|String|✓|OAS2,OAS3
|Byte|✓|OAS2,OAS3
|Binary|✓|OAS2,OAS3
|Boolean|✓|OAS2,OAS3
|Date|✓|OAS2,OAS3
|DateTime|✓|OAS2,OAS3
|Password|✓|OAS2,OAS3
|File|✓|OAS2
|Uuid|✗|
|Array|✓|OAS2,OAS3
|Null|✗|OAS3
|AnyType|✗|OAS2,OAS3
|Object|✓|OAS2,OAS3
|Maps|✓|ToolingExtension
|CollectionFormat|✓|OAS2
|CollectionFormatMulti|✓|OAS2
|Enum|✓|OAS2,OAS3
|ArrayOfEnum|✓|ToolingExtension
|ArrayOfModel|✓|ToolingExtension
|ArrayOfCollectionOfPrimitives|✓|ToolingExtension
|ArrayOfCollectionOfModel|✓|ToolingExtension
|ArrayOfCollectionOfEnum|✓|ToolingExtension
|MapOfEnum|✓|ToolingExtension
|MapOfModel|✓|ToolingExtension
|MapOfCollectionOfPrimitives|✓|ToolingExtension
|MapOfCollectionOfModel|✓|ToolingExtension
|MapOfCollectionOfEnum|✓|ToolingExtension

### Documentation Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Readme|✗|ToolingExtension
|Model|✓|ToolingExtension
|Api|✓|ToolingExtension

### Global Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Host|✓|OAS2,OAS3
|BasePath|✓|OAS2,OAS3
|Info|✓|OAS2,OAS3
|Schemes|✗|OAS2,OAS3
|PartialSchemes|✓|OAS2,OAS3
|Consumes|✓|OAS2
|Produces|✓|OAS2
|ExternalDocumentation|✓|OAS2,OAS3
|Examples|✓|OAS2,OAS3
|XMLStructureDefinitions|✗|OAS2,OAS3
|MultiServer|✗|OAS3
|ParameterizedServer|✗|OAS3
|ParameterStyling|✗|OAS3
|Callbacks|✓|OAS3
|LinkObjects|✗|OAS3

### Parameter Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Path|✓|OAS2,OAS3
|Query|✓|OAS2,OAS3
|Header|✓|OAS2,OAS3
|Body|✓|OAS2
|FormUnencoded|✓|OAS2
|FormMultipart|✓|OAS2
|Cookie|✓|OAS3

### Schema Support Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Simple|✓|OAS2,OAS3
|Composite|✓|OAS2,OAS3
|Polymorphism|✓|OAS2,OAS3
|Union|✗|OAS3
|allOf|✗|OAS2,OAS3
|anyOf|✗|OAS3
|oneOf|✗|OAS3
|not|✗|OAS3

### Security Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|BasicAuth|✓|OAS2,OAS3
|ApiKey|✓|OAS2,OAS3
|OpenIDConnect|✗|OAS3
|BearerToken|✓|OAS3
|OAuth2_Implicit|✓|OAS2,OAS3
|OAuth2_Password|✓|OAS2,OAS3
|OAuth2_ClientCredentials|✓|OAS2,OAS3
|OAuth2_AuthorizationCode|✓|OAS2,OAS3
|SignatureAuth|✗|OAS3

### Wire Format Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|JSON|✓|OAS2,OAS3
|XML|✓|OAS2,OAS3
|PROTOBUF|✗|ToolingExtension
|Custom|✗|OAS2,OAS3
