support for VRaptor2's @out annotation

Out.java

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface Out {
}

OutAnnotationInterceptor.java

@Intercepts(after=ExecuteMethodInterceptor.class, before=ForwardToDefaultViewInterceptor.class)
public class OutAnnotationInterceptor implements Interceptor {
  public OutAnnotationInterceptor(Result result) {
      this.result = result;
  }

  public boolean accepts(ResourceMethod method) { return true; }

  public void intercept(InterceptorStack stack, ResourceMethod method, Object instance) {
      List<Field> fields = new Mirror().on(ResourceMethod.class).reflectAll().fields();
      for (Field field : fields) {
          if (field.isAnnotationPresent(Out.class)) 
              result.include(field.getName(), new Mirror().on(instance).get().field(field));
      }
      stack.next(method, instance);
  }
}