Re: [aspectj-users] One target for intertype declarations

[David Pearce <david.pearce@xxxxxxxxxxxxx>]

Hi Nicholas,

> declare parents : * && (! java.lang.Object) implements I;

Thanks - that did the trick! It hadn't occured to me that I could simply 
put a negation in there.

> Though you probably want a positive limitation (com.foo..*) rather than 
> a negative one (!java.lang..*);

No, I definitely want the negative one because I want to profile 
programs which are unknown to the aspect writer.

Cheers,

Dave

> Cheers,
>
> Nicholas Lesiecki
> Software Craftsman, specializing in J2EE,
> Agile Methods, and aspect-oriented programming
> m: 520 591-1849
>
> Books:
> * Mastering AspectJ: http://tinyurl.com/66vf
> * Java Tools for Extreme Programming: http://tinyurl.com/66vt
>
> Articles on AspectJ:
> * http://tinyurl.com/66vu and http://tinyurl.com/66vv
> On Nov 11, 2004, at 4:56 PM, David Pearce wrote:
>
> > Hi Wes,
> >
> > > aspect A {
> > >   interface I {}
> > >   declare parents : my.packages..* implements I;
> > >   int I.theField = 2;
> >
> >
> > Actually, this pattern is rather interesting to me!  I had tried 
> > something like it, but instead including the "int theField" inside the 
> > interface declaration itself.  This caused problems when I tried to 
> > modify it, since the field was regarded as final.  In fact, I'm 
> > slightly unsure why the above works ?
> >
> > Anyway, it doesn't actually solve my problem since I want to add 
> > fields to *all* objects.  I tried the following:
> >
> > declare parents : * implements I;
> >
> > Which causes some "typeNotExposedToWeaver" warnings and the following 
> > error:
> >
> > > [error] can''t change the parents of java.lang.Object
> >
> > I wonder, is there anyway to say "everything except java.lang.Object" ?
> >
> > Cheers,
> >
> > Dave
> >
> > > > ------------Original Message------------
> > > > From: David Pearce <david.pearce@xxxxxxxxxxxxx>
> > > > To: aspectj-users@xxxxxxxxxxx
> > > > Date: Wed, Nov-10-2004 7:55 PM
> > > > Subject: [aspectj-users] One target for intertype declarations
> > > >
> > > > Hi all,
> > > >
> > > > I would just like to confirm something regarding the elimination of 
> > > > "multi-intertype declarations".  Basically, I want to add a field to 
> > > > every object instance.  So, perviously, I could have just used 
> > > > something like:
> > > >
> > > > aspect A {
> > > >         public int *.theField = 0;
> > > > }
> > > >
> > > > But, since AspectJ 1.1 this syntax is no more.  So, now my question. 
> > > >  Is the pertarget specifier supposed to be used instead of the above 
> > > > now?  I realise that the README-11.html indicates pertype should be 
> > > > used for static field member introduction (if it existed, that is), 
> > > > so I figure the reasoning is the same.
> > > >
> > > > Also, how is pertarget actually implemented?  Does it involve some kind
> > > > of hashmap lookup or not?  If not, then what?
> > > >
> > > > Any help would be appreciated!
> > > >
> > > > David J. Pearce
> > > > _______________________________________________
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