Package javax.ws.rs

Annotation Type ConstrainedTo

  • @Target(TYPE)
@Retention(RUNTIME)
@Documented
public @interface ConstrainedTo
    Indicates the run-time context in which an annotated provider is applicable. If a @ConstrainedTo annotation is not present on a provider type declaration, the declared provider may be used in any run-time context. If such a annotation is present, the runtime will enforce the specified usage restriction.

    The following example illustrates restricting a MessageBodyReader provider implementation to run only as part of a Client run-time: 

      @ConstrainedTo(RuntimeType.CLIENT)
  public class MyReader implements MessageBodyReader {
      ...
  }

    The following example illustrates restricting a WriterInterceptor provider implementation to run only as part of a Server run-time: 

      @ConstrainedTo(RuntimeType.SERVER)
  public class MyWriterInterceptor implements WriterInterceptor {
      ...
  }

    It is a configuration error to constraint a provider implementation to a run-time context in which the provider cannot be applied. In such case, the runtime SHOULD inform a user about the issue and ignore the provider implementation in further processing.

    For example, the following restriction of a ClientRequestFilter to run only as part of the server run-time would be considered invalid: 

      // reported as invalid and ignored by the runtime
  @ConstrainedTo(RuntimeType.SERVER)
  public class MyFilter implements ClientRequestFilter {
      ...
  }
    Since:
    2.0
    Author:
    Marek Potociar

    • Required Element Summary

      Required Elements 
      Modifier and Type Required Element Description
      RuntimeType value
      Define the constraint type to be placed on a provider.