Re: [aspectj-users] Anonymous classes unaware of introductions into abst

[Matthew Webster <matthew_webster@xxxxxxxxxx>]

Marius,

My mistake. However your example compiles with AspectJ 1.2 and AJDT 1.1.12.
What errors do you get?

Matthew Webster
AOSD Project
Java Technology Centre, MP146
IBM Hursley Park, Winchester,  SO21 2JN, England
Telephone: +44 196 2816139 (external) 246139 (internal)
Email: Matthew Webster/UK/IBM @ IBMGB, matthew_webster@xxxxxxxxxx
http://w3.hursley.ibm.com/~websterm/


"Marius M." <marin_marius@xxxxxxxxx>@eclipse.org on 08/10/2004 12:51:27

Please respond to aspectj-users@xxxxxxxxxxx

Sent by:    aspectj-users-admin@xxxxxxxxxxx


To:    aspectj-users@xxxxxxxxxxx
cc:
Subject:    Re: [aspectj-users] Anonymous classes unaware of introductions
       into abstract classes


Matthew,

Perhaps I miss something, but I doubt it is the
"declare parents" statement. AbstractClassA implements
InterfaceA already - the "declare parents" does not
add anything new, imo. Moreover, the introduction
works for the concrete, named class (ConcreteClassA),
which extends AbstractClassA (note: the previous
version of the compiler reported errors for the
concrete class, too. The version 1.2 works fine.).
Thus, it's only the anonymous class that is unaware of
introduction.

BTW: does your aspect solution work for you?


Marius


--- Matthew Webster <matthew_webster@xxxxxxxxxx>
wrote:

>
>
>
>
> Marius,
>
> You are missing something. Although you have an
> inter-type declared method
> for "a2()" on AbstractClassA the statement
> "AbstractClassA is a InterfaceA"
> is not true hence the compiler error:
>
>       Type mismatch: cannot convert from <anonymous
> subclass of
> AbstractClassA> to InterfaceA
>
> You also need a declare parents statement:
>
> public aspect IntroAspectA {
>
>       declare parents : AbstractClassA implements
> InterfaceA;
>
>       public void AbstractClassA.a2() {
>             System.out.println("AbstractClassA.a2()
> from IntroAspectA");
>       }
> }
>
> Matthew Webster
> AOSD Project
> Java Technology Centre, MP146
> IBM Hursley Park, Winchester,  SO21 2JN, England
> Telephone: +44 196 2816139 (external) 246139
> (internal)
> Email: Matthew Webster/UK/IBM @ IBMGB,
> matthew_webster@xxxxxxxxxx
> http://w3.hursley.ibm.com/~websterm/
>
>
> "Marius M." <marin_marius@xxxxxxxxx>@eclipse.org on
> 07/10/2004 13:21:06
>
> Please respond to aspectj-users@xxxxxxxxxxx
>
> Sent by:    aspectj-users-admin@xxxxxxxxxxx
>
>
> To:    aspectj-users@xxxxxxxxxxx
> cc:
> Subject:    [aspectj-users] Anonymous classes
> unaware of introductions into
>        abstract classes
>
>
> Hello,
>
>
>  I couldn't find this problem reported as a bug, but
> I think it is a
>  compiler bug. It seems that anonymous classes are
> not able to "see" the
>  methods introduced by aspects into abstract
> classes.
>
>
>  Apparently, the previous version of the ajc
> compiler had this problem for
>  concrete classes as well, but it was fixed in
> aspectj 1.2. Yet, it doesn't
>  work for anonymous classes:
>
>
>
>
>
>  interface InterfaceA {
>
>
>   public void a1();
>
>   public void a2();
>
>  }
>
>
>  abstract class AbstractClassA implements InterfaceA
> {
>
>
>   public void a1() {
>    System.out.println("AbstractClassA.a()");
>   }
>
>  }
>
>
>
>  public class ConcreteClassA extends AbstractClassA
> {
>
>
>   public void someMethod() {
>    InterfaceA a = new AbstractClassA() {
>    };
>   }
>
>  }
>
>
>  aspect IntroAspectA {
>
>
>   public void AbstractClassA.a2() {
>    System.out.println("AbstractClassA.a2() from
> IntroAspectA");
>   }
>  }
>
>
>
>
>
>  The compiler will complain about the anonymous
> class as not having
>  implemented the method a2(). However, it will work
> if the AbstractClassA
>  is not abstract (or if the class is not anonymous
> :-)).
>
>
>
>
>
>  Thanks,
>
>
>  Marius M.
>
>
>
>
>
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>
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>
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>




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