# Uses of Package
javax.ws.rs.ext

- Packages that use javax.ws.rs.ext
  Package | Description
  --- | ---
  javax.ws.rs.ext | APIs that provide extensions to the types supported by the JAX-RS API.

- Classes in javax.ws.rs.ext used by javax.ws.rs.ext
  Class and Description
  ContextResolver Contract for a provider that supplies context information to resource classes and other providers.
  ExceptionMapper Contract for a provider that maps Java exceptions to `Response`.
  InterceptorContext Context shared by message body interceptors that can be used to wrap calls to `MessageBodyReader.readFrom(java.lang.Class<T>, java.lang.reflect.Type, java.lang.annotation.Annotation[], javax.ws.rs.core.MediaType, javax.ws.rs.core.MultivaluedMap<java.lang.String, java.lang.String>, java.io.InputStream)` and `MessageBodyWriter.writeTo(T, java.lang.Class<?>, java.lang.reflect.Type, java.lang.annotation.Annotation[], javax.ws.rs.core.MediaType, javax.ws.rs.core.MultivaluedMap<java.lang.String, java.lang.Object>, java.io.OutputStream)`.
  MessageBodyReader Contract for a provider that supports the conversion of a stream to a Java type.
  MessageBodyWriter Contract for a provider that supports the conversion of a Java type to a stream.
  ParamConverter Defines a contract for a delegate responsible for converting between a `String` form of a message parameter value and the corresponding custom Java type `T`.
  ReaderInterceptorContext Context class used by `ReaderInterceptor` to intercept calls to (@link javax.ws.rs.ext.MessageBodyReader#readFrom}.
  RuntimeDelegate Implementations of JAX-RS provide a concrete subclass of RuntimeDelegate and various JAX-RS API methods defer to methods of RuntimeDelegate for their functionality.
  RuntimeDelegate.HeaderDelegate Defines the contract for a delegate that is responsible for converting between the String form of a HTTP header and the corresponding JAX-RS type `T`.
  WriterInterceptorContext Context class used by `WriterInterceptor` to intercept calls to `MessageBodyWriter.writeTo(T, java.lang.Class<?>, java.lang.reflect.Type, java.lang.annotation.Annotation[], javax.ws.rs.core.MediaType, javax.ws.rs.core.MultivaluedMap<java.lang.String, java.lang.Object>, java.io.OutputStream)`.

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