org.apache.polygene.api.concern.internal

Annotation Type ConcernFor

@Retention(value=RUNTIME)
 @Target(value={FIELD,PARAMETER})
 @Documented
 @InjectionScope
public @interface ConcernFor

This annotation is required once in each Concern, to mark the field where the next element in the call sequence should be injected.

The type of the field must be of the same type as the Concern itself, or an InvocationHandler.

Example;

 public interface MyStuff
 {
     void doSomething();
 }

 public class MyStuffConcern
     implements MyStuff
 {
     @ConcernFor MyStuff next;

     public void doSomething()
     {
         // HERE DO THE MODIFIER STUFF.

         // Delegate to the underlying mixin/modifier.
         next.doSomething();
     }
 }