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package javax.ws.rs;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Indicates the run-time context in which an annotated JAX-RS provider
* is applicable. If a {@code @ConstrainedTo} annotation is not
* present on a JAX-RS provider type declaration, the declared provider
* may be used in any run-time context. If such a annotation is present,
* the JAX-RS runtime will enforce the specified usage restriction.
*
* The following example illustrates restricting a {@link javax.ws.rs.ext.MessageBodyReader}
* provider implementation to run only as part of a {@link RuntimeType#CLIENT JAX-RS client run-time}:
*
*
* @ConstrainedTo(RuntimeType.CLIENT)
* public class MyReader implements MessageBodyReader {
* ...
* }
*
*
* The following example illustrates restricting a {@link javax.ws.rs.ext.WriterInterceptor}
* provider implementation to run only as part of a {@link RuntimeType#SERVER JAX-RS server run-time}:
*
*
* @ConstrainedTo(RuntimeType.SERVER)
* public class MyWriterInterceptor implements WriterInterceptor {
* ...
* }
*
*
* It is a configuration error to constraint a JAX-RS provider implementation to
* a run-time context in which the provider cannot be applied. In such case a JAX-RS
* runtime SHOULD inform a user about the issue and ignore the provider implementation in further
* processing.
*
*
* For example, the following restriction of a {@link javax.ws.rs.client.ClientRequestFilter}
* to run only as part of a JAX-RS server run-time would be considered invalid:
*
*
* // reported as invalid and ignored by JAX-RS runtime
* @ConstrainedTo(RuntimeType.SERVER)
* public class MyFilter implements ClientRequestFilter {
* ...
* }
*
*
* @author Marek Potociar
* @since 2.0
*/
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface ConstrainedTo {
/**
* Define the {@link RuntimeType constraint type} to be placed on a JAX-RS provider.
*/
RuntimeType value();
}