public void packFiles(ZipOutputStream zipOutput) throws IOException {
   // pack them together
   List<Bundle> bundles = framework.getAllBundles();
   for (Bundle bundle : bundles) {
     if (!bundle.isFragment()) {
       List<Bundle> fragments = bundle.getFragments();
       if (fragments != null) {
         for (Bundle fragment : fragments) {
           packBundle(zipOutput, fragment);
         }
       }
     }
     packBundle(zipOutput, bundle);
   }
 }
  public void packDescription(ZipOutputStream zipOutput)
      throws IOException, ParserConfigurationException, TransformerException {
    ZipEntry entry = new ZipEntry("plugin.xml");
    zipOutput.putNextEntry(entry);
    try {
      Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
      Element documentRoot = document.createElement("plugin");
      document.appendChild(documentRoot);

      List<Bundle> bundles = framework.getAllBundles();
      for (Bundle bundle : bundles) {
        if (!bundle.isFragment()) {
          List<Bundle> fragments = bundle.getFragments();
          if (fragments != null) {
            for (Bundle fragment : fragments) {
              Document description = fragment.getDescription();
              if (description != null) {
                Node comment = document.createComment("import from " + fragment.getBundleID());
                document.getDocumentElement().appendChild(comment);
                appendDescription(document, description);
              }
            }
          }
        }
        Document description = bundle.getDescription();
        if (description != null) {
          Node comment = document.createComment("import from " + bundle.getBundleID());
          document.getDocumentElement().appendChild(comment);
          appendDescription(document, description);
        }
      }
      // Prepare the DOM document for writing
      Source source = new DOMSource(document);
      // Prepare the output file
      Result result = new StreamResult(zipOutput);
      // Write the DOM document to the file
      Transformer xformer = TransformerFactory.newInstance().newTransformer();
      xformer.transform(source, result);
    } finally {
      zipOutput.closeEntry();
    }
  }