注释类型 EndpointExtension

@Target(TYPE)
@Retention(RUNTIME)
@Documented
public @interface EndpointExtension

Annotation primarily used as a meta-annotation to indicate that an annotation provides extension support for an endpoint. Extensions allow additional technology specific operations to be added to an existing endpoint. For example, a web extension may offer variations of a read operation to support filtering based on a query parameter.

Extension annotations must provide an EndpointFilter to restrict when the extension applies. The endpoint attribute is usually re-declared using @AliasFor. For example:

 @EndpointExtension(filter = WebEndpointFilter.class)
 public @interface EndpointWebExtension {

   @AliasFor(annotation = EndpointExtension.class, attribute = "endpoint")
   Class<?> endpoint();

 }