Drag and drop issue between JLists

Question

Hi,
I am trying to implement DnD into my application between different JLists, but I can't get it to work.
In my application I have two different panels, a SearchPanel, and a DataPanel.
On each panel I have two JLists, one which contains strings, another which contains a custom class called Goals.
The lists on the searchpanels are the source of the drag action, each with their own DataFlavor. I wanted each of the two JLists on the datapanel to accept both flavors, so I implemented the DropTargetListener on the DataPanel. I figured I could determine where the drag came from depending the DataFlavor of the Transferable, but somehow, he treats the GoalTransferable as Strings, and adds them to the wrong list...
Is there anyone that knows were I might have made a mistake?
Here is some code:
The search panel with relevant bits and pieces, th materialsList contains Strings, the goalsList contains Goal objects
public class SearchPanel extends JPanel implements ActionListener, DragGestureListener, DragSourceListener {
   private JList materialsList;
   private JList goalsList;
   private void createGUI () {
      materialsList = new JList();
      materialsList.setDragEnabled(true);
      goalsList = new JList();
      goalsList.setDragEnabled(true);
      DragSource dragSource = DragSource.getDefaultDragSource();
      dragSource.createDefaultDragGestureRecognizer(goalsList,DnDConstants.ACTION_COPY, this);
   public void dragGestureRecognized(DragGestureEvent dge) {
      Goal selection = (Goal)goalsList.getSelectedValue();
      Transferable transferable = new GoalTransferable(selection);
      dge.startDrag(new Cursor(Cursor.MOVE_CURSOR), transferable);
   public void dragDropEnd(DragSourceDropEvent dsde) {}
   public void dragEnter(DragSourceDragEvent dsde) {}
   public void dragExit(DragSourceEvent dse) {}
   public void dragOver(DragSourceDragEvent dsde) {}
   public void dropActionChanged(DragSourceDragEvent dsde) {}
}For the GoalTransferable class:
    public class GoalTransferable implements Transferable {
        private DataFlavor goalFlavor = null;
        private DataFlavor supportedFlavors[] = {goalFlavor};
        private Goal object;
        public GoalTransferable (Goal o) {
            object = o;
            try {
                goalFlavor = new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType + ";class=nl.lycos.fierensyves.jsv.data.Goal");
            } catch (Exception e) {}
        public Object getTransferData(DataFlavor df)
            throws UnsupportedFlavorException {
            if (isDataFlavorSupported (df))
                return object;
            else
                throw new UnsupportedFlavorException(df);
        public boolean isDataFlavorSupported (DataFlavor df) {
            return (df.equals (goalFlavor));
        public DataFlavor[] getTransferDataFlavors () {
            return supportedFlavors;
    }And finally for the datapanel:
public class DataPanel extends JPanel implements ActionListener, MouseListener, KeyListener, ChangeListener, DropTargetListener {
     private JList materials;
     private JList goals;
                private DataFlavor goalFlavor = null;
     public ActivityFrame (DataReader data) {
          this.materials = new JList();
                                DropTarget materialsTarget = new DropTarget(materials, this);
          this.goals = new JList();
          this.goals.addMouseListener(this);
                                DropTarget goalsTarget = new DropTarget(goals, this);
                                this.goals.setTransferHandler(new GoalTransferHandler(goals));
                                try {
                                                goalFlavor = new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType + ";class=nl.lycos.fierensyves.jsv.data.Goal");
                                } catch (Exception e) {}
                                public void drop (DropTargetDropEvent dtde) {
                                if (dtde.isDataFlavorSupported(goalFlavor)) {
                                                 //import goal
                                } else {
                                                 //import material
                                     TreeSetListModel model = (TreeSetListModel)this.materials.getModel();
                                                String material = "";
                                                try {
                                                                 material = dtde.getTransferable().getTransferData(DataFlavor.stringFlavor).toString();
                                                } catch (Exception e) {}
                                     model.addElement(material);
                                     this.materials.setModel(model);
                                     this.materials.updateUI();
                public void dragEnter(DropTargetDragEvent dtde) {}
                public void dragExit(DropTargetEvent dte) {}
                public void dragOver(DropTargetDragEvent dtde) {}
                public void dropActionChanged(DropTargetDragEvent dtde) {}       
}greetings,
fifijr

Answer 1

That does not exist - the workaround (maybe permanent solution - who knows) is
File menu ==> export
And BTW if you are not backingup all the time you are 100% guarenteed to lose all of your files and photos sooner or later
LN