Re: [aspectj-users] Re: Extending standard java classes

[Alex Villazon <alex.villazon@xxxxxxxxxxx>]

On Dec 2, 2008, at 3:49 PM, Tassilo Horn wrote:

> Alex Villazon <alex.villazon@xxxxxxxxxxx> writes:
>
> Hi Alex,
>
> > > What I want to do is to add an interface to some classes.  From the
> > > documentation I can see how that's done, but unfortunately I want to
> > > add this interface to about 10 classes from java.lang and java.util.
> > >
> > > When I did that I got warnings that the affected types aren't  
> > > exposed
> > > to the weaver.  So I added the JRE System Library to the *inpath*.
> > > But then I don't have enough memory to run the aspectj compiler.
> >
> >   You could simply edit ajc script and change the -Xmx param (e.g. -
> > Xmx1G)
>
> I use the eclipse plugin and have -Xmx1G in my eclipse.ini.  And  
> that's
> not enough. ;-)

 Hi,
   I think you should weave the JDK classes offline, and not within  
eclipse.
   I don't have enough experiences with woven JDK with eclipse...

> > > So is there a way to pick only the 10 classes I need out of the
> > > library?
> >
> >  One way is to unjar the rt.jar on a directory, and then make your
> > own jar with the classes you need, and weave them.
>
> I thought that might be a solution.  But then I'd need to recreate  
> that
> lib whenever I update the JDK and maybe it could lead into problems if
> developers use different JDK versions (1.6.0 vs. 1.6.10).

  Mmm, I think anyways that you need to build a woven JDK (or part of  
it) on a per aspect basis...


> Well, there are worse things, but when you say "one way" do you  
> imagine
> another way, too?

   I'm not sure how weaving JDK classes could be combined with  
eclipse. So far, I only explored that issue without a IDE.
   I think that you could weave the rt classes offline, and then use  
the VM params within eclipse to pass them through -Xbootclasspath..   
Not sure if this will work out of the box, but I think so..

Alex


> > Something like
> > mkdir JDK
> > cd JDK
> > jar xvf $JAVA_HOME/jre/lib/rt.jar
> > jar cvf myrt.jar java/lang/... java/util/...
> >
> > Then you weave myrt.jar and finally pass the woven myrt.jar to -
> > Xbootclasspath/p:
>
> I'll try that out anyway.
>
> Thanks a lot,
> Tassilo
>
> _______________________________________________
> aspectj-users mailing list
> aspectj-users@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/aspectj-users