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package org.glassfish.jersey.message.filtering;
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;
/**
* Meta-annotation used to create entity filtering annotations for entity (model) classes and resource methods and resources.
* <p>
* Entity Data Filtering via annotations is supposed to be used to annotate:
* <ul>
* <li>entity classes (supported on both, server and client sides), and</li>
* <li>resource methods / resource classes (server side)</li>
* </ul>
* </p>
* <p>
* In entity filtering, a <i>entity-filtering</i> annotation is first defined using the {@code @EntityFiltering} meta-annotation:
* <pre>
* @Target({ ElementType.TYPE, ElementType.METHOD, ElementType.FIELD })
* @Retention(value = RetentionPolicy.RUNTIME)
* <b>@EntityFiltering</b>
* <b>public @interface DetailedView</b> {
*
* public static class Factory extends <b>AnnotationLiteral<DetailedView></b> implements <b>DetailedView</b> {
*
* public static <b>DetailedView</b> get() {
return new Factory();
}
* }
* }
* </pre>
* </p>
* <p>
* Entity-filtering annotation should provide a factory class/method to create an instance of the annotation. Example of such
* factory can be seen in the {@code DetailedView} above. Such instances can be then passed to the client/server runtime to
* define/override entity-filtering scopes.
* </p>
* <p>
* The defined entity-filtering annotation is then used to decorate a entity, it's property accessors or fields (more than one
* entity may be decorated with the same entity-filtering annotation):
* <pre>
* public class MyEntityClass {
*
* <b>@DetailedView</b>
* private String myField;
*
* ...
* }
* </pre>
* </p>
* <p>
* At last, on the server-side, the entity-filtering annotations are applied to the resource or resource method(s) to which the
* entity-filtering should be applied:
* <pre>
* @Path("/")
* public class MyResourceClass {
*
* @GET
* @Produces("text/plain")
* @Path("{id}")
* <b>@DetailedView</b>
* public MyEntityClass get(@PathParam("id") String id) {
* // Return MyEntityClass.
* }
* }
* </pre>
* </p>
* <p>
* At last, on the client-side, the entity-filtering annotations are passed to the runtime via
* {@link javax.ws.rs.client.Entity#entity(Object, javax.ws.rs.core.MediaType, java.lang.annotation.Annotation[]) Entity.entity()}
* method and the entity-filtering scopes are then derived from the annotations:
* <pre>
* ClientBuilder.newClient()
* .target("resource")
* .request()
* .post(Entity.entity(myentity, "application/json", <b>new Annotation[] {MyEntityClass.Factory.get()}</b>));
* </pre>
* </p>
*
* @author Michal Gajdos
*/
@Target(ElementType.ANNOTATION_TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface EntityFiltering {
}