Swing/TableCellTransferHandler のバックアップ(No.3)

//DataFlavor FLAVOR = new ActivationDataFlavor(JTable.class, DataFlavor.javaJVMLocalObjectMimeType, "JTable");
class CellIconTransferHandler extends TransferHandler {
  private final DataFlavor localObjectFlavor;
  public CellIconTransferHandler(DataFlavor flavor) {
    super();
    localObjectFlavor = flavor;
  }
  @Override protected Transferable createTransferable(JComponent c) {
    JTable table = (JTable) c;
    int idx = table.getSelectedColumn();
    if (Icon.class.isAssignableFrom(table.getColumnClass(idx))) {
        return new DataHandler(table, localObjectFlavor.getMimeType());
    }
    return null;
  }
  @Override public boolean canImport(TransferSupport info) {
    return false;
  }
  @Override public int getSourceActions(JComponent c) {
    return TransferHandler.COPY;
  }
}

class TableCellTransferHandler extends TransferHandler {
  private final DataFlavor localObjectFlavor;
  public TableCellTransferHandler(DataFlavor flavor) {
    super();
    localObjectFlavor = flavor;
  }
  @Override public boolean canImport(TransferSupport info) {
    Component c = info.getComponent();
    if (c instanceof JList) {
      return info.isDrop() && info.isDataFlavorSupported(localObjectFlavor);
    }
    return false;
  }
  @Override public int getSourceActions(JComponent c) {
    return TransferHandler.COPY;
  }
  @SuppressWarnings("unchecked")
  @Override public boolean importData(TransferSupport info) {
    if (!canImport(info)) {
      return false;
    }
    JList l = (JList) info.getComponent();
    try {
      Object o = info.getTransferable().getTransferData(localObjectFlavor);
      if (o instanceof JTable) {
        JTable t = (JTable) o;
        Object obj = t.getValueAt(t.getSelectedRow(), t.getSelectedColumn());
        ((DefaultListModel) l.getModel()).addElement(obj);
      }
      return true;
    } catch (UnsupportedFlavorException | IOException ex) {
      ex.printStackTrace();
    }
    return false;
  }
}