private void blossomDirectory(File dir) throws IOException {
   // System.out.println(">> blossomDirectory() on " + dir.getPath());
   String canonicalPath = dir.getCanonicalPath();
   String[] listing = (filter == null ? dir.list() : dir.list(filter));
   for (int i = listing.length; --i >= 0; ) {
     // System.out.println(">> listing: " + listing[i]);
     if (filter == null || filter.accept(dir, listing[i])) {
       String name = (canonical ? canonicalPath : dir.getPath()) + File.separator + listing[i];
       File file = new File(name);
       // System.out.println(">> parent: " + dir.getName());
       // System.out.println(">> created file: " + file.getPath());
       if (file.isFile()) files.push(file);
       else // dir
       {
         if (!markedDirex.containsKey(file.getCanonicalPath())) direx.push(file);
       }
     }
   }
   markedDirex.put(canonicalPath, dummy);
 }