Re: [aspectj-users] static crosscutting and type patterns

[Jakob Praher <jpraher@xxxxxxxx>]

Am Mit, 2003-02-05 um 20.55 schrieb Wes Isberg:
> > unfortunatelly, though, the [OnType] identifier otherPackage.* does not
> > work for me :-(
> > 
> > has this changed?
> 
> AspectJ 1.1 permits only one target for inter-type declarations.
> 
> http://dev.eclipse.org/viewcvs/indextech.cgi/~checkout~/aspectj-home/README-11.html#SINGLE_INTERCLASS_TARGET
> 
> (The documentation examples have not been updated for 1.1.)
> 
> > I have three classes foo.A,foo.B,foo.C and an Interface I.
> 
> Do you want declare on the interface?
> 
>   aspect A {
>       public void I.doIt( ) {
>           System.out.println("this will compile");
>       }
>   }
> 
I will try it. I noticed this syntax in the language reference, but
since I am a newbee, I was not sure.

I like the syntax - very stylish, and the mapping is not needed since it
is already stated in the "declare parents" part. 

thanks

-- Jakob

> Wes
> 
> Jakob Praher wrote:
> > 
> > hi everybody,
> > 
> > I have a question concerning static crosscutting and type patterns.
> > in the docu there is an example which is what I want to achieve:
> > 
> > aspect A {
> >     private Registry otherPackage.*.r;
> >     public void otherPackage.*.register(Registry r) {
> >         r.register(this);
> >         this.r = r;
> >     }
> > }
> > 
> > unfortunatelly, though, the [OnType] identifier otherPackage.* does not
> > work for me :-(
> > 
> > has this changed?
> > 
> > perhaps there is another way to achieve:
> > 
> > I have three classes foo.A,foo.B,foo.C and an Interface I.
> > The interface implementation is generic, but I don't want to write an
> > abstract base class, since there is already a base class.
> > 
> > so I wanted to do the following (which when hard coding the identifier
> > "OnType" works well )
> > 
> > interface I {
> > 
> >    public void doIt( );
> > }
> > 
> > aspect {
> > 
> >   declare parents: foo.* implements I;  /* this works perfectly ! */
> > 
> >   /* but now I want to crosscut the methods, which work, if */
> >   public void foo.A.doIt( ) {
> >      System.out.println( "finished!" );
> >   }
> > 
> >   /* but not when I do : */
> >   public void foo.*.doIt( ) {
> >      System.out.println( "this won't compile :-(" );
> >   }
> > 
> > }
> > 
> > is there a new, or other way to achieve it?
> > is there a way to externalize the type declarations (like load type
> > names from a list, so you don't have to change the aspect, when a new
> > package, or class is added ) ?
> > 
> > thank you in advance
> > 
> > -- Jakob
> > btw: i am using aspectj 1.1
> > 
> > _______________________________________________
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