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The source code

/*
 *                 Sun Public License Notice
 * 
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 * 
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2000 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.modules.debugger.ui.models;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.lang.ref.WeakReference;
import java.util.Vector;

import org.netbeans.api.debugger.DebuggerManager;
import org.netbeans.api.debugger.DebuggerManagerAdapter;
import org.netbeans.api.debugger.Session;
import org.netbeans.spi.viewmodel.NodeModel;
import org.netbeans.spi.viewmodel.TreeModel;
import org.netbeans.spi.viewmodel.TreeModelListener;
import org.netbeans.spi.viewmodel.UnknownTypeException;
import org.openide.util.NbBundle;


/**
 * @author   Jan Jancura
 */
public class SesionsNodeModel implements NodeModel {

    public static final String SESSION =
        "org/netbeans/modules/debugger/resources/sessionsView/Session";
    public static final String CURRENT_SESSION =
        "org/netbeans/modules/debugger/resources/sessionsView/CurrentSession";

    private Vector listeners = new Vector ();
    private Listener listener;
    
    
    public String getDisplayName (Object o) throws UnknownTypeException {
        if (listener == null)
            listener = new Listener (this);
        if (o == TreeModel.ROOT) {
            return NbBundle.getBundle(SesionsNodeModel.class).getString("CTL_SessionsModel_Column_Name_Name");
        } else
        if (o instanceof Session) {
            return ((Session) o).getName ();
        } else
        throw new UnknownTypeException (o);
    }
    
    public String getShortDescription (Object o) throws UnknownTypeException {
        if (listener == null)
            listener = new Listener (this);
        if (o == TreeModel.ROOT) {
            return TreeModel.ROOT;
        } else
        if (o instanceof Session) {
            return null;
        } else
        throw new UnknownTypeException (o);
    }
    
    public String getIconBase (Object o) throws UnknownTypeException {
        if (listener == null)
            listener = new Listener (this);
        if (o == TreeModel.ROOT) {
            return SESSION;
        } else
        if (o instanceof Session) {
            if (o == DebuggerManager.getDebuggerManager ().getCurrentSession ())
                return CURRENT_SESSION;
            else
                return SESSION;
        } else
        throw new UnknownTypeException (o);
    }

    /** 
     *
     * @param l the listener to add
     */
    public void addTreeModelListener (TreeModelListener l) {
        listeners.add (l);
    }

    /** 
     *
     * @param l the listener to remove
     */
    public void removeTreeModelListener (TreeModelListener l) {
        listeners.remove (l);
    }
    
    private void fireTreeChanged () {
        Vector v = (Vector) listeners.clone ();
        int i, k = v.size ();
        for (i = 0; i < k; i++)
            ((TreeModelListener) v.get (i)).treeChanged ();
    }
    
    private void fireTreeNodeChanged (Object parent) {
        Vector v = (Vector) listeners.clone ();
        int i, k = v.size ();
        for (i = 0; i < k; i++)
            ((TreeModelListener) v.get (i)).treeNodeChanged (parent);
    }
    
    
    // innerclasses ............................................................
    
    
    /**
     * Listens on DebuggerManager on PROP_CURRENT_SESSION.
     */
    private static class Listener extends DebuggerManagerAdapter {
        
        private WeakReference ref;
        
        private Listener (
            SesionsNodeModel rm
        ) {
            ref = new WeakReference (rm);
            DebuggerManager.getDebuggerManager ().addDebuggerListener (
                DebuggerManager.PROP_CURRENT_SESSION,
                this
            );
        }
        
        private SesionsNodeModel getModel () {
            SesionsNodeModel rm = (SesionsNodeModel) ref.get ();
            if (rm == null) {
                DebuggerManager.getDebuggerManager ().
                    removeDebuggerListener (
                        DebuggerManager.PROP_CURRENT_SESSION,
                        this
                    );
            }
            return rm;
        }
        
        public void propertyChange (PropertyChangeEvent e) {
            SesionsNodeModel rm = getModel ();
            if (rm == null) return;
            rm.fireTreeChanged ();
        }
    }
}
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