[aspectj-users] Intertype declaration with methods returning instances o

[Paulo Alexandre Corigo Zenida <paulo.zenida@xxxxxxxx>]

Em Sexta, 17 de Fevereiro de 2006 09:54, o Paulo Alexandre Corigo Zenida 
escreveu:
> Hi all,
>
>         I wonder if, in Intertype declaration, is it possible for me to add
> a method to any class with a common characteristic (annotated with
> something, for example, that returns an instance of the class itself? To
> better understand what I want, let me show an example:
>
>         @MyAnnotation
>         public class A {
>
>         }
>
>         @MyAnnotation
>         public class B {
>
>         }
>
>         public aspect MyAspect {
>                 
>                 // this does not compile
>                 public void (@MyAnnotation *).foo() {
>
>                 }
>
>                 // So, I have tried this:
>                 declare parents : (@MyAnnotation *) implements MyInterface;
>
>                 interface MyInterface {
>
>                 }
>
>                 // this works ok
>                 public void MyInterface.foo() {
>                         System.out.println("In foo");
>                 }
>
>                 // But this does not compile! I would like to create a
>                 // method returning an instance of the class itself. 
> 		   // Any ideas about how to do this? 
> 		   public (@Singleton *) getInstance() { 
>                         return new (@Singleton *)();
>                 }
What I mean was
 		   public (@MyInterface *) getInstance() { 
                         return new (@MyInterface *)();
                 }
         }
>
>         Is the previous possible?
>
>         Thanks in advance. Cheers,
>
>                 Paulo Zenida