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

["Marius M." <marin_marius@xxxxxxxxx>]

Matthew,

Here is the error:


$ ajc -version
AspectJ Compiler 1.2 built on Friday May 21, 2004 at
15:06:22 GMT
$ ajc ConcreteClassA.java
error can't find type $Local$
 
/home/marin/tests/ConcreteClassA.java:18 error Class
must implement the inherited abstract method
InterfaceA.a2()
InterfaceA a = new AbstractClassA() {
                   ^^^^^^^^^^^^^
 
2 errors
--------

If you comment out the body of someMethod() (the
anonymous class), it compiles without errors.

-- Marius

P.S. For Eclipse, too ..


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

> 
> 
> 
> 
> 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
> > :-)).
> >
> >
> >
> >
> 
=== message truncated ===



		
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