/**
   * Expands the sub folders and image informations under the specified node.
   *
   * @param node the node.
   */
  protected void expandNode(DefaultMutableTreeNode node) {
    try {
      Object[] paths = node.getPath();

      String path_str = "";
      Vector folder_list = new Vector();
      for (int i = 1; i < paths.length; i++) {
        String name = (String) ((DefaultMutableTreeNode) paths[i]).getUserObject();
        path_str += "/" + name;

        // Converts January...December to 1...12.
        if (mode == DATE_ORIENTED && i == 2) {
          for (int m = 1; m <= 12; m++) {
            if (JulianDay.getFullSpellMonthString(m).equals(name)) name = String.valueOf(m);
          }
        }

        folder_list.addElement(name);
      }

      // When to expand sub folders.
      Vector folders = new Vector();
      if (mode == DATE_ORIENTED) folders = db_manager.getDateOrientedFolders(folder_list);
      if (mode == PATH_ORIENTED) folders = db_manager.getPathOrientedFolders(folder_list);
      addNode(node, folders);

      // When to expand image informations.
      XmlDBAccessor accessor = null;
      if (mode == DATE_ORIENTED) accessor = db_manager.getDateOrientedAccessor(folder_list);
      if (mode == PATH_ORIENTED) accessor = db_manager.getPathOrientedAccessor(folder_list);
      if (accessor != null) {
        Vector name_list = new Vector();
        XmlInformation info = (XmlInformation) accessor.getFirstElement();
        while (info != null) {
          name_list.addElement(info.getPath());
          hash_info.put(path_str + "/" + info.getPath(), info);
          info = (XmlInformation) accessor.getNextElement();
        }
        addNode(node, name_list);
      }

      revalidate();
      repaint();
    } catch (IOException exception) {
      String message = "Failed to read the database.";
      JOptionPane.showMessageDialog(pane, message, "Error", JOptionPane.ERROR_MESSAGE);
    }
  }
    /** Runs this thread. */
    public void run() {
      CommonFileChooser file_chooser = new CommonFileChooser();
      file_chooser.setDialogTitle("Choose a directory.");
      file_chooser.setMultiSelectionEnabled(false);
      file_chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);

      if (file_chooser.showSaveDialog(pane) == JFileChooser.APPROVE_OPTION) {
        try {
          File directory = file_chooser.getSelectedFile();
          directory.mkdirs();

          // Outputs the variability XML file.

          String path = FileManager.unitePath(directory.getAbsolutePath(), "package.xml");
          File file = new File(path);
          if (file.exists()) {
            String message = "Overwrite to " + file.getPath() + " ?";
            if (0
                != JOptionPane.showConfirmDialog(
                    pane, message, "Confirmation", JOptionPane.YES_NO_OPTION)) {
              return;
            }
          }

          XmlVariabilityHolder holder = new XmlVariabilityHolder();

          Variability[] records = getSelectedRecords();
          for (int i = 0; i < records.length; i++) {
            XmlVariability variability = new XmlVariability(records[i]);
            holder.addVariability(variability);
          }

          holder.write(file);

          // Copies the report XML document files.

          Hashtable hash_xml = new Hashtable();

          for (int i = 0; i < records.length; i++) {
            XmlMagRecord[] mag_records = records[i].getMagnitudeRecords();
            for (int j = 0; j < mag_records.length; j++)
              hash_xml.put(mag_records[j].getImageXmlPath(), this);
          }

          Vector failed_list = new Vector();

          Enumeration keys = hash_xml.keys();
          while (keys.hasMoreElements()) {
            String xml_path = (String) keys.nextElement();
            try {
              File src_file = desktop.getFileManager().newFile(xml_path);
              File dst_file =
                  new File(FileManager.unitePath(directory.getAbsolutePath(), xml_path));
              if (dst_file.exists() == false) FileManager.copy(src_file, dst_file);
            } catch (Exception exception) {
              failed_list.addElement(xml_path);
            }
          }

          if (failed_list.size() > 0) {
            String header = "Failed to copy the following XML files:";
            MessagesDialog dialog = new MessagesDialog(header, failed_list);
            dialog.show(pane, "Error", JOptionPane.ERROR_MESSAGE);
          }

          // Copies the image files.

          failed_list = new Vector();

          keys = hash_xml.keys();
          while (keys.hasMoreElements()) {
            path = (String) keys.nextElement();
            try {
              XmlInformation info =
                  XmlReport.readInformation(desktop.getFileManager().newFile(path));
              path = info.getImage().getContent();

              File src_file = desktop.getFileManager().newFile(path);
              File dst_file = new File(FileManager.unitePath(directory.getAbsolutePath(), path));
              if (dst_file.exists() == false) FileManager.copy(src_file, dst_file);
            } catch (Exception exception) {
              failed_list.addElement(path);
            }
          }

          if (failed_list.size() > 0) {
            String header = "Failed to copy the following image files:";
            MessagesDialog dialog = new MessagesDialog(header, failed_list);
            dialog.show(pane, "Error", JOptionPane.ERROR_MESSAGE);
          }

          // Creates the sub catalog database.

          try {
            DiskFileSystem file_system =
                new DiskFileSystem(
                    new File(
                        directory.getAbsolutePath(),
                        net.aerith.misao.pixy.Properties.getDatabaseDirectoryName()));
            CatalogDBManager new_manager = new GlobalDBManager(file_system).getCatalogDBManager();

            Hashtable hash_stars = new Hashtable();
            for (int i = 0; i < records.length; i++) {
              CatalogStar star = records[i].getStar();

              CatalogDBReader reader =
                  new CatalogDBReader(desktop.getDBManager().getCatalogDBManager());
              StarList list = reader.read(star.getCoor(), 0.5);
              for (int j = 0; j < list.size(); j++) {
                CatalogStar s = (CatalogStar) list.elementAt(j);
                hash_stars.put(s.getOutputString(), s);
              }
            }

            keys = hash_stars.keys();
            while (keys.hasMoreElements()) {
              String string = (String) keys.nextElement();
              CatalogStar star = (CatalogStar) hash_stars.get(string);
              new_manager.addElement(star);
            }
          } catch (Exception exception) {
            String message = "Failed to create sub catalog database.";
            JOptionPane.showMessageDialog(pane, message, "Error", JOptionPane.ERROR_MESSAGE);
          }

          String message = "Completed.";
          JOptionPane.showMessageDialog(pane, message);
        } catch (IOException exception) {
          String message = "Failed.";
          JOptionPane.showMessageDialog(pane, message, "Error", JOptionPane.ERROR_MESSAGE);
        }
      }
    }