Re: [aspectj-users] Runtime weaving

[Wes Isberg <wes@xxxxxxxxxxxxxx>]

You've perhaps seen

  http://bugs.eclipse.org/bugs/show_bug.cgi?id=31460

But there's some issues with it...

Wes

Joel Shellman wrote:
> 
> Can someone just post a very brief sample code of runtime weaving?
> 
> I'm trying to get it to work, but can't seem to get it. Here's what I have
> so far (don't laugh too hard, I just hacked this together quickly):
> 
>  public static void main(String[] args) throws Exception {
>   BcelWorld world = new BcelWorld();
>   BcelWeaver w = new BcelWeaver(world);
>   w.addLibraryAspect("org.sparrowdb.enhancer.EnhancerAspect");
>   byte[] bytes = new byte[128000];
>   InputStream is =
> EnhancerLoader.class.getClassLoader().getResourceAsStream("org/sparrowdb/obj
> /Item.class");
>   int length = is.read(bytes);
>   System.out.println("bytes: "+length);
>   byte[] usebytes = new byte[length];
>   System.arraycopy(bytes, 0, usebytes, 0, length);
> 
>   UnwovenClassFile clsFile = new UnwovenClassFile("org.sparrowdb.obj.Item",
> usebytes);
>   w.addClassFile(clsFile);
>   w.weave(new File("C:/temp/test.zip"));
> 
>   ResolvedTypeX t = world.resolve(clsFile.getClassName());
>   BcelObjectType type = BcelWorld.getBcelObjectType(t);
>   LazyClassGen lcg = w.weaveWithoutDump(clsFile, type);
>   byte[] newBytes = lcg.getJavaClass().getBytes();
> 
>   System.out.println("nb: "+newBytes);
>  }
> 
> The problem above is that lcg is returned null from the weaveWithoutDump
> call.
> 
> Thanks!
> 
> -joel shellman
> 
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