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Config Options for java
java
Option Description Values Default
additionalModelTypeAnnotations Additional annotations for model type(class level annotations) null
allowUnicodeIdentifiers boolean, toggles whether unicode identifiers are allowed in names or not, default is false false
apiPackage package for generated api classes org.openapitools.client.api
artifactDescription artifact description in generated pom.xml OpenAPI Java
artifactId artifactId in generated pom.xml. This also becomes part of the generated library's filename openapi-java-client
artifactUrl artifact URL in generated pom.xml https://github.com/openapitools/openapi-generator
artifactVersion artifact version in generated pom.xml. This also becomes part of the generated library's filename 1.0.0
asyncNative If true, async handlers will be used, instead of the sync version false
bigDecimalAsString Treat BigDecimal values as Strings to avoid precision loss. false
booleanGetterPrefix Set booleanGetterPrefix get
caseInsensitiveResponseHeaders Make API response's headers case-insensitive. Available on okhttp-gson, jersey2 libraries false
dateLibrary Option. Date library to use
joda
Joda (for legacy app only)
legacy
Legacy java.util.Date (if you really have a good reason not to use threetenbp
java8-localdatetime
Java 8 using LocalDateTime (for legacy app only)
java8
Java 8 native JSR310 (preferred for jdk 1.8+) - note: this also sets "java8" to true
threetenbp
Backport of JSR310 (preferred for jdk < 1.8)
threetenbp
developerEmail developer email in generated pom.xml team@openapitools.org
developerName developer name in generated pom.xml OpenAPI-Generator Contributors
developerOrganization developer organization in generated pom.xml OpenAPITools.org
developerOrganizationUrl developer organization URL in generated pom.xml http://openapitools.org
disableHtmlEscaping Disable HTML escaping of JSON strings when using gson (needed to avoid problems with byte[] fields) false
disallowAdditionalPropertiesIfNotPresent Specify the behavior when the 'additionalProperties' keyword is not present in the OAS document. If false: the 'additionalProperties' implementation is compliant with the OAS and JSON schema specifications. If true: when the 'additionalProperties' keyword is not present in a schema, the value of 'additionalProperties' is set to false, i.e. no additional properties are allowed. Note: this mode is not compliant with the JSON schema specification. This is the original openapi-generator behavior.This setting is currently ignored for OAS 2.0 documents: 1) When the 'additionalProperties' keyword is not present in a 2.0 schema, additional properties are NOT allowed. 2) Boolean values of the 'additionalProperties' keyword are ignored. It's as if additional properties are NOT allowed.Note: the root cause are issues #1369 and #1371, which must be resolved in the swagger-parser project.
false
The 'additionalProperties' implementation is compliant with the OAS and JSON schema specifications.
true
when the 'additionalProperties' keyword is not present in a schema, the value of 'additionalProperties' is automatically set to false, i.e. no additional properties are allowed. Note: this mode is not compliant with the JSON schema specification. This is the original openapi-generator behavior.
true
discriminatorCaseSensitive Whether the discriminator value lookup should be case-sensitive or not. This option only works for Java API client true
ensureUniqueParams Whether to ensure parameter names are unique in an operation (rename parameters that are not). true
fullJavaUtil whether to use fully qualified name for classes under java.util. This option only works for Java API client false
groupId groupId in generated pom.xml org.openapitools
hideGenerationTimestamp Hides the generation timestamp when files are generated. false
invokerPackage root package for generated code org.openapitools.client
java8 Use Java8 classes instead of third party equivalents. Starting in 5.x, JDK8 is the default and the support for JDK7, JDK6 has been dropped
true
Use Java 8 classes such as Base64
false
Various third party libraries as needed
true
legacyDiscriminatorBehavior This flag is used by OpenAPITools codegen to influence the processing of the discriminator attribute in OpenAPI documents. This flag has no impact if the OAS document does not use the discriminator attribute. The default value of this flag is set in each language-specific code generator (e.g. Python, Java, go...)using the method toModelName. Note to developers supporting a language generator in OpenAPITools; to fully support the discriminator attribute as defined in the OAS specification 3.x, language generators should set this flag to true by default; however this requires updating the mustache templates to generate a language-specific discriminator lookup function that iterates over {{#mappedModels}} and does not iterate over {{children}}, {{#anyOf}}, or {{#oneOf}}.
true
The mapping in the discriminator includes descendent schemas that allOf inherit from self and the discriminator mapping schemas in the OAS document.
false
The mapping in the discriminator includes any descendent schemas that allOf inherit from self, any oneOf schemas, any anyOf schemas, any x-discriminator-values, and the discriminator mapping schemas in the OAS document AND Codegen validates that oneOf and anyOf schemas contain the required discriminator and throws an error if the discriminator is missing.
true
library library template (sub-template) to use
jersey1
HTTP client: Jersey client 1.19.x. JSON processing: Jackson 2.9.x. Enable Java6 support using '-DsupportJava6=true'. Enable gzip request encoding using '-DuseGzipFeature=true'. IMPORTANT NOTE: jersey 1.x is no longer actively maintained so please upgrade to 'jersey2' or other HTTP libaries instead.
jersey2
HTTP client: Jersey client 2.25.1. JSON processing: Jackson 2.9.x
feign
HTTP client: OpenFeign 10.x. JSON processing: Jackson 2.9.x.
okhttp-gson
[DEFAULT] HTTP client: OkHttp 3.x. JSON processing: Gson 2.8.x. Enable Parcelable models on Android using '-DparcelableModel=true'. Enable gzip request encoding using '-DuseGzipFeature=true'.
retrofit2
HTTP client: OkHttp 3.x. JSON processing: Gson 2.x (Retrofit 2.3.0). Enable the RxJava adapter using '-DuseRxJava[2/3]=true'. (RxJava 1.x or 2.x or 3.x)
resttemplate
HTTP client: Spring RestTemplate 4.x. JSON processing: Jackson 2.9.x
webclient
HTTP client: Spring WebClient 5.x. JSON processing: Jackson 2.9.x
resteasy
HTTP client: Resteasy client 3.x. JSON processing: Jackson 2.9.x
vertx
HTTP client: VertX client 3.x. JSON processing: Jackson 2.9.x
google-api-client
HTTP client: Google API client 1.x. JSON processing: Jackson 2.9.x
rest-assured
HTTP client: rest-assured : 4.x. JSON processing: Gson 2.x or Jackson 2.10.x. Only for Java 8
native
HTTP client: Java native HttpClient. JSON processing: Jackson 2.9.x. Only for Java11+
microprofile
HTTP client: Microprofile client 1.x. JSON processing: Jackson 2.9.x
okhttp-gson
licenseName The name of the license Unlicense
licenseUrl The URL of the license http://unlicense.org
microprofileFramework Framework for microprofile. Possible values "kumuluzee" null
modelPackage package for generated models org.openapitools.client.model
openApiNullable Enable OpenAPI Jackson Nullable library true
parcelableModel Whether to generate models for Android that implement Parcelable with the okhttp-gson library. false
parentArtifactId parent artifactId in generated pom N.B. parentGroupId, parentArtifactId and parentVersion must all be specified for any of them to take effect null
parentGroupId parent groupId in generated pom N.B. parentGroupId, parentArtifactId and parentVersion must all be specified for any of them to take effect null
parentVersion parent version in generated pom N.B. parentGroupId, parentArtifactId and parentVersion must all be specified for any of them to take effect null
performBeanValidation Perform BeanValidation false
playVersion Version of Play! Framework (possible values "play24" (Deprecated), "play25" (Deprecated), "play26" (Default)) null
prependFormOrBodyParameters Add form or body parameters to the beginning of the parameter list. false
scmConnection SCM connection in generated pom.xml scm:git:git@github.com:openapitools/openapi-generator.git
scmDeveloperConnection SCM developer connection in generated pom.xml scm:git:git@github.com:openapitools/openapi-generator.git
scmUrl SCM URL in generated pom.xml https://github.com/openapitools/openapi-generator
serializableModel boolean - toggle "implements Serializable" for generated models false
serializationLibrary Serialization library, default depends from the library
jackson
Use Jackson as serialization library
gson
Use Gson as serialization library
null
snapshotVersion Uses a SNAPSHOT version.
true
Use a SnapShot Version
false
Use a Release Version
null
sortModelPropertiesByRequiredFlag Sort model properties to place required parameters before optional parameters. true
sortParamsByRequiredFlag Sort method arguments to place required parameters before optional parameters. true
sourceFolder source folder for generated code src/main/java
supportJava6 Whether to support Java6 with the Jersey1 library. This option has been deprecated and will be removed in the 5.x release false
useAbstractionForFiles Use alternative types instead of java.io.File to allow passing bytes without a file on disk. Available on resttemplate library false
useBeanValidation Use BeanValidation API annotations false
useGzipFeature Send gzip-encoded requests false
usePlayWS Use Play! Async HTTP client (Play WS API) false
useReflectionEqualsHashCode Use org.apache.commons.lang3.builder for equals and hashCode in the models. WARNING: This will fail under a security manager, unless the appropriate permissions are set up correctly and also there's potential performance impact. false
useRuntimeException Use RuntimeException instead of Exception false
useRxJava Whether to use the RxJava adapter with the retrofit2 library. IMPORTANT: this option has been deprecated and will be removed in the 5.x release. false
useRxJava2 Whether to use the RxJava2 adapter with the retrofit2 library. false
useRxJava3 Whether to use the RxJava3 adapter with the retrofit2 library. false
withXml whether to include support for application/xml content type and include XML annotations in the model (works with libraries that provide support for JSON and XML) false

IMPORT MAPPING

Type/Alias Imports
Array java.util.List
ArrayList java.util.ArrayList
BigDecimal java.math.BigDecimal
Date java.util.Date
DateTime org.joda.time.*
File java.io.File
HashMap java.util.HashMap
LinkedHashSet java.util.LinkedHashSet
List java.util.*
LocalDate org.joda.time.*
LocalDateTime org.joda.time.*
LocalTime org.joda.time.*
Map java.util.Map
Set java.util.*
Timestamp java.sql.Timestamp
URI java.net.URI
UUID java.util.UUID

INSTANTIATION TYPES

Type/Alias Instantiated By
array ArrayList
map HashMap
set LinkedHashSet

LANGUAGE PRIMITIVES

  • Boolean
  • Double
  • Float
  • Integer
  • Long
  • Object
  • String
  • boolean
  • byte[]

RESERVED WORDS

  • abstract
  • apiclient
  • apiexception
  • apiresponse
  • assert
  • boolean
  • break
  • byte
  • case
  • catch
  • char
  • class
  • configuration
  • const
  • continue
  • default
  • do
  • double
  • else
  • enum
  • extends
  • final
  • finally
  • float
  • for
  • goto
  • if
  • implements
  • import
  • instanceof
  • int
  • interface
  • localreturntype
  • localvaraccept
  • localvaraccepts
  • localvarauthnames
  • localvarcollectionqueryparams
  • localvarcontenttype
  • localvarcontenttypes
  • localvarcookieparams
  • localvarformparams
  • localvarheaderparams
  • localvarpath
  • localvarpostbody
  • localvarqueryparams
  • long
  • native
  • new
  • null
  • object
  • package
  • private
  • protected
  • public
  • return
  • short
  • static
  • strictfp
  • stringutil
  • super
  • switch
  • synchronized
  • this
  • throw
  • throws
  • transient
  • try
  • void
  • volatile
  • while

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
Array 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

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

Wire Format Feature

Name Supported Defined By
JSON OAS2,OAS3
XML OAS2,OAS3
PROTOBUF ToolingExtension
Custom OAS2,OAS3