# Code Gen Settings
APIMatic’s code generation engine has various code generation configurations to customise the behaviour and outlook across the generated SDKS. This structure encapsulates all settings for CodeGeneration.
## Structure
`CodeGenSettings`
## Fields
| Name | Type | Tags | Description |
| --- | --- | --- | --- |
| `isAsync` | `boolean` | Required | Generate asynchronous code for API Calls and deserialization |
| `useHttpMethodPrefix` | `boolean` | Required | Use HTTP Method prefixes for endpoint wrappers |
| `useModelPrefix` | `boolean` | Required | Use "Model" postfixes for generated class names |
| `useEnumPrefix` | `boolean` | Required | Use "Enum" postfixes for enumerated types |
| `useConstructorsForConfig` | `boolean` | Required | - |
| `useCommonSdkLibrary` | `boolean` | Required | Use common SDK library to reduce code duplication |
| `generateInterfaces` | `boolean` | Required | Generates interfaces for controller classes in the generated SDKs |
| `generateAppveyorConfig` | `boolean` | Required | Generate Appveyor configuration file |
| `generateCircleConfig` | `boolean` | Required | Generate CircleCI configuration file |
| `generateJenkinsConfig` | `boolean` | Required | Generate Jenkins configuration file |
| `generateTravisConfig` | `boolean` | Required | Generate Travis CI configuration file |
| `androidUseAppManifest` | `boolean` | Required | Use "AndroidManifest.xml" for config variables in Android |
| `iosUseAppInfoPlist` | `boolean` | Required | Use "App-Info.plist" file for config variables in iOS |
| `iosGenerateCoreData` | `boolean` | Required | Generate "CoreData" schema and entity classes in iOS? |
| `runscopeEnabled` | `boolean` | Required | Enable runscope |
| `collapseParamsToArray` | `boolean` | Required | Collect Parameters as arrays |
| `preserveParameterOrder` | `boolean` | Required | Attempts to preserve parameter order for endpoints |
| `appendContentHeaders` | `boolean` | Required | Append JSON/XML accept and content-type headers |
| `modelSerializationIsJSON` | `boolean` | Required | - |
| `nullify404` | `boolean` | Required | Return a null value on HTTP 404 |
| `validateRequiredParameters` | `boolean` | Required | Validate required parameters to be Not Null |
| `enableAdditionalModelProperties` | `boolean` | Required | Allow models to have additional runtime properties |
| `javaUsePropertiesConfig` | `boolean` | Required | - |
| `useControllerPrefix` | `boolean` | Required | Use "Controller" postfixes for generated controller classes |
| `useExceptionPrefix` | `boolean` | Required | Use Exception Prefixes |
| `parameterArrayFormat` | `string` | Required | Parameter Array format with index or without |
| `objCHttpClient` | `string` | Required | Configure the HTTP client for Objective C |
| `cSharpHttpClient` | `string` | Required | Configure the HTTP client for C# |
| `androidHttpClient` | `string` | Required | Configure the HTTP client for Android |
| `nodeHttpClient` | `string` | Required | Configure the HTTP client for node |
| `phpHttpClient` | `string` | Required | Configure the HTTP client for PHP |
| `bodySerialization` | `number` | Required | - |
| `arraySerialization` | `string` | Required | Specify type of array serialisation |
| `timeout` | `number` | Required | This option specifies the duration (in seconds) after which requests would timeout |
| `enableLogging` | `boolean` | Required | Enabling this generates code in the SDKs for logging events in the API cycle using a library. |
| `enableHttpCache` | `boolean` | Required | Enabling caching of responses (not available in all languages) |
| `retries` | `number` | Required | Specify number of retries |
| `retryInterval` | `number` | Required | Specify retry interval in case of failures |
| `generateAdvancedDocs` | `boolean` | Required | Generate advanced read me files |
| `storeTimezoneInformation` | `boolean` | Required | Store Timezone information for the generation |
| `enablePhpComposerVersionString` | `boolean` | Required | Use "Controller" postfixes for generated controller classes |
| `securityProtocols` | `string[]` | Required | Specify Security Protocols |
| `underscoreNumbers` | `boolean` | Required | Use underscores before and after numbers for underscore case |
| `useSingletonPattern` | `boolean` | Required | Allow usage of a Singleton Pattern |
| `disableLinting` | `boolean` | Required | Files/dependencies used for linting are not generated if this option is enabled |
| `allowSkippingSSLCertVerification` | `boolean` | Required | Create a configuration option in SDKs to optionally skip certificate verification when establishing HTTPS connections. |
| `applyCustomizations` | `string[]` | Required | Apply Customisations |
| `doNotSplitWords` | `string[]` | Required | Enabling this will stop splitting of words when converting identifiers from API specification to language-specific identifiers. |
| `sortResources` | `boolean` | Required | Sorts resources such as endpoints, endpoint groups and models in generated documentation |
| `enableGlobalUserAgent` | `boolean` | Required | Enable a global user agent |
## Example (as JSON)
```json
{
"isAsync": true,
"useHttpMethodPrefix": true,
"useModelPrefix": false,
"useEnumPrefix": true,
"useConstructorsForConfig": false,
"useCommonSdkLibrary": false,
"generateInterfaces": false,
"generateAppveyorConfig": false,
"generateCircleConfig": false,
"generateJenkinsConfig": false,
"generateTravisConfig": false,
"androidUseAppManifest": false,
"iosUseAppInfoPlist": false,
"iosGenerateCoreData": false,
"runscopeEnabled": false,
"collapseParamsToArray": false,
"preserveParameterOrder": true,
"appendContentHeaders": true,
"modelSerializationIsJSON": true,
"nullify404": false,
"validateRequiredParameters": false,
"enableAdditionalModelProperties": false,
"javaUsePropertiesConfig": false,
"useControllerPrefix": true,
"useExceptionPrefix": true,
"parameterArrayFormat": "ParamArrayWithIndex",
"objCHttpClient": "UNIREST",
"cSharpHttpClient": "UNIREST",
"androidHttpClient": "ANDROID_OK",
"nodeHttpClient": "NODE_REQUEST",
"phpHttpClient": "UNIREST",
"bodySerialization": 0,
"arraySerialization": "Indexed",
"timeout": 0,
"enableLogging": false,
"enableHttpCache": false,
"retries": 0,
"retryInterval": 1,
"generateAdvancedDocs": true,
"storeTimezoneInformation": false,
"enablePhpComposerVersionString": false,
"securityProtocols": [
"Ssl3",
"Tls"
],
"underscoreNumbers": true,
"useSingletonPattern": true,
"disableLinting": false,
"allowSkippingSSLCertVerification": false,
"applyCustomizations": [],
"doNotSplitWords": [],
"sortResources": false,
"enableGlobalUserAgent": true
}
```
