/*
 *                 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.examples.debugger.jpda.callstackviewfilterring;

import java.util.ArrayList;
import org.netbeans.api.debugger.jpda.CallStackFrame;
import org.netbeans.spi.viewmodel.ComputingException;
import org.netbeans.spi.viewmodel.NoInformationException;
import org.netbeans.spi.viewmodel.NodeModel;
import org.netbeans.spi.viewmodel.TreeModel;
import org.netbeans.spi.viewmodel.TreeModelFilter;
import org.netbeans.spi.viewmodel.TreeModelListener;
import org.netbeans.spi.viewmodel.UnknownTypeException;




public class CallStackFilter implements TreeModelFilter, NodeModel {
    
    
    public Object[] getChildren (TreeModel original, Object parent, int from, int to) 
    throws NoInformationException, ComputingException, UnknownTypeException {
        Object[] originalCh = original.getChildren (parent, from, to);
        int i, k = originalCh.length;
        ArrayList newCh = new ArrayList ();
        boolean in = false;
        for (i = 0; i < k; i++) {
            if (! (originalCh [i] instanceof CallStackFrame)) {
                newCh.add (originalCh [i]);
                continue;
            }
            CallStackFrame f = (CallStackFrame) originalCh [i];
            String className = f.getClassName ();
            if (className.startsWith ("java")) {
                if (!in) {
                    newCh.add (new JavaFrames ());
                    in = true;
                }
            } else {
                in = false;
                newCh.add (f);
            }
        }
        return newCh.toArray ();
    }
    
    public Object getRoot (TreeModel original) {
        return original.getRoot ();
    }
    
    public boolean isLeaf (TreeModel original, Object node) 
    throws UnknownTypeException {
        if (node instanceof JavaFrames) return true;
        return original.isLeaf (node);
    }
    
    public void addTreeModelListener (TreeModelListener l) {
    }
    public void removeTreeModelListener (TreeModelListener l) {
    }
    
    public String getDisplayName (Object node) throws UnknownTypeException {
        if (node instanceof JavaFrames)
            return "Java Callstack Frames";
        throw new UnknownTypeException (node);
    }
    
    public String getIconBase (Object node) throws UnknownTypeException {
        if (node instanceof JavaFrames)
            return "org/netbeans/examples/debugger/jpda/callstackviewfilterring/NonCurrentFrame";
        throw new UnknownTypeException (node);
    }
    
    public String getShortDescription (Object node) throws UnknownTypeException {
        if (node instanceof JavaFrames)
            return "Unimportant hidden callstack frames";
        throw new UnknownTypeException (node);
    }
    
    private static class JavaFrames {}
}