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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
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* The contents of this file are subject to the terms of either the GNU
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* General Public License Version 2 only ("GPL") or the Common
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* Development and Distribution License("CDDL") (collectively, the
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* "License"). You may not use this file except in compliance with the
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* License. You can obtain a copy of the License at
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* http://www.netbeans.org/cddl-gplv2.html
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* or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
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* specific language governing permissions and limitations under the
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* nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* License Header, with the fields enclosed by brackets [] replaced by
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* "Portions Copyrighted [year] [name of copyright owner]"
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* The Original Software is NetBeans. The Initial Developer of the Original
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* Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
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* However, if you add GPL Version 2 code and therefore, elected the GPL
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package org.netbeans.modules.debugger.jpda.ui.models;
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import org.netbeans.api.debugger.jpda.JPDAThread;
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import org.netbeans.api.debugger.jpda.JPDAThreadGroup;
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import org.netbeans.spi.viewmodel.TreeExpansionModel;
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import org.netbeans.spi.viewmodel.UnknownTypeException;
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import org.openide.util.WeakSet;
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public class ThreadsTreeExpansionModel implements TreeExpansionModel {
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private Set expandedNodes = new WeakSet();
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private Set collapsedNodes = new WeakSet();
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* Defines default state (collapsed, expanded) of given node.
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* @return default state (collapsed, expanded) of given node
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public boolean isExpanded (Object node)
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throws UnknownTypeException {
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if (expandedNodes.contains(node)) {
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if (collapsedNodes.contains(node)) {
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// Default behavior follows:
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if (node instanceof MonitorModel.ThreadWithBordel)
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if (node instanceof JPDAThreadGroup)
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if (node instanceof JPDAThread)
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throw new UnknownTypeException (node);
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* Called when given node is expanded.
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* @param node a expanded node
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public void nodeExpanded (Object node) {
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expandedNodes.add(node);
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collapsedNodes.remove(node);
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* Called when given node is collapsed.
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* @param node a collapsed node
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public void nodeCollapsed (Object node) {
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synchronized (this) {
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collapsedNodes.add(node);
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expandedNodes.remove(node);