JTableのCellにJCheckBoxを複数配置する

class CheckBoxesPanel extends JPanel {
  private static final String OSNAME = System.getProperty("os.name");
  protected final String[] title = {"r", "w", "x"};
  public JCheckBox[] buttons;
  public CheckBoxesPanel() {
    super();
    setOpaque(false);
    setBackground(new Color(0x0, true));
    setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
    initButtons();
  }

  protected void initButtons() {
    buttons = new JCheckBox[title.length];
    for (int i = 0; i < buttons.length; i++) {
      JCheckBox b = new JCheckBox(title[i]);
      b.setOpaque(false);
      b.setFocusable(false);
      b.setRolloverEnabled(false);
      b.setBackground(new Color(0x0, true));
      buttons[i] = b;
      add(b);
      add(Box.createHorizontalStrut(5));
    }
  }

  protected void updateButtons(Object v) {
    if ("Windows 7".equals(OSNAME)) { //Windows aero?
      removeAll();
      initButtons();
    }
    Integer i = (Integer) (v == null ? 0 : v);
    buttons[0].setSelected((i & (1 << 2)) != 0);
    buttons[1].setSelected((i & (1 << 1)) != 0);
    buttons[2].setSelected((i & (1 << 0)) != 0);
  }
}

class CheckBoxesRenderer extends CheckBoxesPanel
                         implements TableCellRenderer, Serializable {
  public CheckBoxesRenderer() {
    super();
    setName("Table.cellRenderer");
  }

  @Override public Component getTableCellRendererComponent(JTable table,
      Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    updateButtons(value);
    return this;
  }

  public static class UIResource extends CheckBoxesRenderer implements UIResource {}
}

class CheckBoxesEditor extends CheckBoxesPanel
                       implements TableCellEditor, Serializable {
  public CheckBoxesEditor() {
    ActionListener al = new ActionListener() {
      @Override public void actionPerformed(ActionEvent e) {
        fireEditingStopped();
      }
    };
    ActionMap am = getActionMap();
    for (int i = 0; i < buttons.length; i++) {
      final JCheckBox b = buttons[i];
      b.addActionListener(al);
      am.put(title[i], new AbstractAction(title[i]) {
        @Override public void actionPerformed(ActionEvent e) {
          b.setSelected(!b.isSelected());
          fireEditingStopped();
        }
      });
    }
    InputMap im = getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
    im.put(KeyStroke.getKeyStroke(KeyEvent.VK_R, 0), title[0]);
    im.put(KeyStroke.getKeyStroke(KeyEvent.VK_W, 0), title[1]);
    im.put(KeyStroke.getKeyStroke(KeyEvent.VK_X, 0), title[2]);
  }

  @Override public Component getTableCellEditorComponent(JTable table,
        Object value, boolean isSelected, int row, int column) {
    updateButtons(value);
    return this;
  }

  @Override public Object getCellEditorValue() {
    int i = 0;
    if (buttons[0].isSelected()) i |= 1 << 2;
    if (buttons[1].isSelected()) i |= 1 << 1;
    if (buttons[2].isSelected()) i |= 1 << 0;
    return i;
  }

  // Copied from AbstractCellEditor
  protected EventListenerList listenerList = new EventListenerList();
  transient protected ChangeEvent changeEvent = null;
  // ...