Name: sdC67446 Date: 07/19/99


The method
    public EventListener[] getListeners(Class listenerType)
of class javax.swing.tree.DefaultTreeModel
throws unspecified ClassCastException for all input parameters except
TreeModelListener.class.
The method should return null/empty array or documentation should be
updated.

The doc says:
--------------------------------------------------
ublic EventListener[] getListeners(Class listenerType)

      Return an array of all the listeners of the given type that were
      added to this model.
      Since:
            1.3

The test demonstrating the bug:
-----------------Test.java------------------------
import javax.swing.tree.*;
import javax.swing.event.*;
import java.util.*;

public class Test {

    public static class DummyTreeModelListener implements TreeModelListener {
    
        public void treeNodesChanged(TreeModelEvent e) {}
        public void treeNodesInserted(TreeModelEvent e) {}
        public void treeNodesRemoved(TreeModelEvent e) {}
        public void treeStructureChanged(TreeModelEvent e) {}
        public boolean isListening(DefaultTreeModel model) {
            return false;
        }
    }

    public static void main(String[] args) {
        DefaultMutableTreeNode root =
            new DefaultMutableTreeNode(new Integer(1975));
        DefaultTreeModel model = new DefaultTreeModel(root);
        
        DummyTreeModelListener l = new DummyTreeModelListener();
        
        System.out.println("- 1 -");
        System.out.println(model.getListeners(TreeModelListener.class));
        System.out.println("- 2 -");
        System.out.println(model.getListeners(Integer.class));
    }
}
---------Output from the test---------------------
- 1 -
[Ljavax.swing.event.TreeModelListener;@54a10fb9
- 2 -
Exception in thread "main" java.lang.ClassCastException: java.lang.Object
        at javax.swing.event.EventListenerList.getListeners(EventListenerList.java, Compiled Code)
        at javax.swing.tree.DefaultTreeModel.getListeners(DefaultTreeModel.java, Compiled Code)
        at Test.main(Test.java, Compiled Code)
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