[aspectj-users] Runtime weaving

[Joel Shellman <joel@xxxxxxxxxxxx>]

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