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diff --git a/accessibility/workben/org/openoffice/accessibility/awb/tree/AccessibilityModel.java b/accessibility/workben/org/openoffice/accessibility/awb/tree/AccessibilityModel.java
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+/*************************************************************************
+ *
+ *  $RCSfile: AccessibilityModel.java,v $
+ *
+ *  $Revision: 1.1 $
+ *
+ *  last change: $Author: obr $ $Date: 2003/09/19 09:21:39 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+package org.openoffice.accessibility.awb.tree;
+
+import javax.swing.SwingUtilities;
+import javax.swing.tree.TreeNode;
+import javax.swing.tree.MutableTreeNode;
+import javax.swing.tree.DefaultMutableTreeNode;
+
+import com.sun.star.uno.UnoRuntime;
+import com.sun.star.awt.XExtendedToolkit;
+import com.sun.star.awt.XTopWindow;
+import com.sun.star.awt.XTopWindowListener;
+import com.sun.star.accessibility.AccessibleRole;
+import com.sun.star.accessibility.XAccessible;
+import com.sun.star.accessibility.XAccessibleContext;
+import com.sun.star.accessibility.XAccessibleEventBroadcaster;
+import com.sun.star.accessibility.XAccessibleEventListener;
+
+/**
+ *
+ */
+public abstract class AccessibilityModel extends javax.swing.tree.DefaultTreeModel {
+
+    protected java.util.Hashtable nodeList;
+    protected static DefaultMutableTreeNode disconnectedRootNode =
+        new DefaultMutableTreeNode("<not connected>");
+
+    /** Creates a new instance of AccessibilityModel */
+    public AccessibilityModel() {
+        super(disconnectedRootNode, false);
+        nodeList = new java.util.Hashtable();
+    }
+
+    /* Convenience method that creates a new Toolkit node from xToolkit
+     * and sets as the new root object of the tree.
+     */
+    public synchronized void setRoot(XExtendedToolkit xToolkit) {
+        if (xToolkit != null) {
+            try {
+                // remove old root node as topwindow listener
+                if (getRoot() instanceof ToolkitNode) {
+                    ToolkitNode tn = (ToolkitNode) getRoot();
+                    if (tn.xToolkit != null) {
+                        tn.xToolkit.removeTopWindowListener(tn);
+                    }
+                }
+                nodeList.clear();
+                setRoot(new ToolkitNode(xToolkit, this));
+                xToolkit.addTopWindowListener((ToolkitNode) getRoot());
+            } catch (com.sun.star.uno.RuntimeException e) {
+                // FIXME: error message !
+            }
+        }
+    }
+
+    /* Appends the new child to parent's child list */
+    public void addNodeInto(MutableTreeNode newChild, MutableTreeNode parent) {
+        int index = parent.getChildCount();
+        if (newChild != null && newChild.getParent() == parent) {
+            index -= 1;
+        }
+        insertNodeInto(newChild, parent, index);
+    }
+
+    /** Adds listener to the listener chain of node */
+    public static void addEventListener(TreeNode node, XAccessibleEventListener listener) {
+        if (node instanceof AccessibilityNode) {
+            ((AccessibilityNode) node).addEventListener(listener);
+        }
+    }
+
+    /** Removes listener from the listener chain of node */
+    public static void removeEventListener(TreeNode node, XAccessibleEventListener listener) {
+        if (node instanceof AccessibilityNode) {
+            ((AccessibilityNode) node).removeEventListener(listener);
+        }
+    }
+
+    protected abstract AccessibilityNode createWindowNode(XAccessible xAccessible,
+            XAccessibleContext xAccessibleContext);
+    protected abstract AccessibilityNode createNode(XAccessible xAccessible);
+
+    /** Adds xAccessible,node to the internal hashtable */
+    public AccessibilityNode putNode(XAccessible xAccessible, AccessibilityNode node) {
+        if (xAccessible != null) {
+            String oid = UnoRuntime.generateOid(xAccessible);
+            java.lang.ref.WeakReference ref = (java.lang.ref.WeakReference)
+                nodeList.put(oid, new java.lang.ref.WeakReference(node));
+            if (ref != null) {
+                return (AccessibilityNode) ref.get();
+            }
+        }
+        return null;
+    }
+
+    /** Returns the AccessibilityNode for xAccessible */
+    public AccessibilityNode findNode(XAccessible xAccessible) {
+        if (xAccessible != null) {
+            String oid = UnoRuntime.generateOid(xAccessible);
+            java.lang.ref.WeakReference ref =
+                (java.lang.ref.WeakReference) nodeList.get(oid);
+            if (ref != null) {
+                return (AccessibilityNode) ref.get();
+            }
+        }
+        return null;
+    }
+
+    /** Removes the AccessibilityNode for xAccessible from the internal hashtable */
+    public AccessibilityNode removeNode(XAccessible xAccessible) {
+        if (xAccessible != null) {
+            String oid = UnoRuntime.generateOid(xAccessible);
+            java.lang.ref.WeakReference ref =
+                (java.lang.ref.WeakReference) nodeList.remove(oid);
+            if (ref != null) {
+                return (AccessibilityNode) ref.get();
+            }
+        }
+        return null;
+    }
+
+    public AccessibilityNode removeNode(Object o) {
+        if (o instanceof XAccessible) {
+            return removeNode((XAccessible) o);
+        }
+        return null;
+    }
+}