JTree DnD, disable clipboard

Question

We have a JTree which contains custom nodes. We have enabled inter-tree Drag and Drop on the tree (Java 6 only. For java 5, we disable it), which works wonderfully, although in the example that you see below, it's only partially enabled. These nodes contain references to data (in the example, this data is represented via the Death class).
The problem, though, is that the clipboard appears to be enabled on this tree. In our case, it does not make sense to allow the clipboard, and in fact hinders the usefulness of our tree, because the shortcut keys (in particular, Shift-Delete) throw exceptions about the data not being serializable. We have plans to map Shift-Delete to something else, and would like to disable the clipboard, so that any other shortcuts also do not interfere with the tree's functioning.
So basically our question is "How do we disable the clipboard on our JTree?"
The code below is an example that demonstrates the problem. Our project is very large, so of course I'm not going to include the full thing, but this should be enough to give you an idea of the general layout of our tree, as well as the problem. When you run it, you will see a very basic tree with a node selected. You then press Shift-Delete and you will get a NotSerializableException because it's trying to serialize the node to the clipboard.
Notice, I have only tested this on Windows. It is most likely OS dependent and Look and Feel dependent due to the shortcut keys.
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTree;
import javax.swing.TransferHandler;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;
public class ResNode extends DefaultMutableTreeNode implements Transferable
     private static final long serialVersionUID = 1L;
     private static final DataFlavor NODE_FLAVOR = new DataFlavor(ResNode.class,"Node");
     private static final DataFlavor[] flavors = { NODE_FLAVOR };
     public Death death; //used in another module
     public ResNode(String name)
          super(name);
          death = new Death();
     //Truncated for the purposes of this example
     public class Death
     public DataFlavor[] getTransferDataFlavors()
          return flavors;
     public boolean isDataFlavorSupported(DataFlavor flavor)
          return flavor == NODE_FLAVOR;
     public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException
          if (flavor != NODE_FLAVOR) throw new UnsupportedFlavorException(flavor);
          return this;
     public static void main(String[] args)
          ResNode root = new ResNode("Root");
          ResNode node = new ResNode("Node");
          root.add(node);
          JTree tree = new JTree(root);
          tree.setSelectionPath(new TreePath(node.getPath()));
          tree.setTransferHandler(new TransferHandler()
                    private static final long serialVersionUID = 1L;
                    protected Transferable createTransferable(JComponent c)
                         return (ResNode) ((JTree) c).getLastSelectedPathComponent();
                    public int getSourceActions(JComponent c)
                         return MOVE;
          JFrame frame = new JFrame("Test");
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.add(tree);
          frame.pack();
          frame.setLocationRelativeTo(null);
          frame.setVisible(true);
     }

Answer 1

We have a JTree which contains custom nodes. We have enabled inter-tree Drag and Drop on the tree (Java 6 only. For java 5, we disable it), which works wonderfully, although in the example that you see below, it's only partially enabled. These nodes contain references to data (in the example, this data is represented via the Death class).
The problem, though, is that the clipboard appears to be enabled on this tree. In our case, it does not make sense to allow the clipboard, and in fact hinders the usefulness of our tree, because the shortcut keys (in particular, Shift-Delete) throw exceptions about the data not being serializable. We have plans to map Shift-Delete to something else, and would like to disable the clipboard, so that any other shortcuts also do not interfere with the tree's functioning.
So basically our question is "How do we disable the clipboard on our JTree?"
The code below is an example that demonstrates the problem. Our project is very large, so of course I'm not going to include the full thing, but this should be enough to give you an idea of the general layout of our tree, as well as the problem. When you run it, you will see a very basic tree with a node selected. You then press Shift-Delete and you will get a NotSerializableException because it's trying to serialize the node to the clipboard.
Notice, I have only tested this on Windows. It is most likely OS dependent and Look and Feel dependent due to the shortcut keys.
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTree;
import javax.swing.TransferHandler;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;
public class ResNode extends DefaultMutableTreeNode implements Transferable
     private static final long serialVersionUID = 1L;
     private static final DataFlavor NODE_FLAVOR = new DataFlavor(ResNode.class,"Node");
     private static final DataFlavor[] flavors = { NODE_FLAVOR };
     public Death death; //used in another module
     public ResNode(String name)
          super(name);
          death = new Death();
     //Truncated for the purposes of this example
     public class Death
     public DataFlavor[] getTransferDataFlavors()
          return flavors;
     public boolean isDataFlavorSupported(DataFlavor flavor)
          return flavor == NODE_FLAVOR;
     public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException
          if (flavor != NODE_FLAVOR) throw new UnsupportedFlavorException(flavor);
          return this;
     public static void main(String[] args)
          ResNode root = new ResNode("Root");
          ResNode node = new ResNode("Node");
          root.add(node);
          JTree tree = new JTree(root);
          tree.setSelectionPath(new TreePath(node.getPath()));
          tree.setTransferHandler(new TransferHandler()
                    private static final long serialVersionUID = 1L;
                    protected Transferable createTransferable(JComponent c)
                         return (ResNode) ((JTree) c).getLastSelectedPathComponent();
                    public int getSourceActions(JComponent c)
                         return MOVE;
          JFrame frame = new JFrame("Test");
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.add(tree);
          frame.pack();
          frame.setLocationRelativeTo(null);
          frame.setVisible(true);
     }