String pkg = path2package(path);
String pkg = prefix + path2package(path);
    public void execute() throws BuildException {        if (this.destDir != null) {            System.out.println("Destination: "+this.destDir);        }                Project project = this.getProject();        for (FileSet fileSet : this.fileSets) {            File idir = fileSet.getDir(project);            File odir = this.destDir != null ? this.destDir : idir;            DirectoryScanner scanner = fileSet.getDirectoryScanner(project);            String[] filenames = scanner.getIncludedFiles();            for (String filename : filenames) {                String path = stripExt(filename);                String pkg = path2package(path);                File ifile = new File(idir, filename);                File ofile = new File(odir, path+".js");                if (upToDate(ifile, ofile)) {                    continue;                }                System.out.println("Compiling "+ifile);                if (odir != idir) {                    File pdir = ofile.getParentFile();                    pdir.mkdirs();                }                try {                    convert(ifile, ofile, pkg);                }                catch (IOException e) {                    System.err.println("error: "+e.getMessage());                }            }        }    }