[Javaprofiler-commits] CVS: module/net/sourceforge/javaprofiler/module/data BacktraceSupport.java,NONE,1.1

[Lukas P. <pe...@us...>]

Update of /cvsroot/javaprofiler/module/net/sourceforge/javaprofiler/module/data
In directory usw-pr-cvs1:/tmp/cvs-serv19585

Added Files:
	BacktraceSupport.java 
Log Message:
added cpu backtrace view


--- NEW FILE: BacktraceSupport.java ---
/*
 *                         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 the Java Profiler module.  The Initial Developers
 * of the Original Code are Jan Stola, Pavel Vacha, Michal Pise, Petr Luner,
 * Lukas Petru and Marek Przeczek.
 *
 * Portions created by Jan Stola are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Portions created by Pavel Vacha are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Portions created by Michal Pise are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Portions created by Petr Luner are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Portions created by Lukas Petru are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Portions created by Marek Przeczek are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Contributors: Jan Stola, Pavel Vacha, Michal Pise, Petr Luner,
 *               Lukas Petru and Marek Przeczek.
 */

package net.sourceforge.javaprofiler.module.data;

import java.util.*;
import net.sourceforge.javaprofiler.jpi.TraceRef;
import net.sourceforge.javaprofiler.jpi.FrameRef;
import net.sourceforge.javaprofiler.jpi.CPUStat;
import net.sourceforge.javaprofiler.jpi.CPUStatListener;

/** Support for showing backtrace view.
 *  @author Lukas Petru
 */
public class BacktraceSupport {
    /** Splits a list of <code>TraceRef</code> objects into a map which has
     *  <code>FrameRef</code> of selected level as key and a list of traces
     *  containing this frame as a value.
     *  @param traces List of <code>TraceRef</code>.
     *  @param level Has value 1 to N, where value 1 means last called method
     *      and higher numbers mean callers.
     */
    public static Map split(List traces, int level) {
        if (level < 1)
            throw new IllegalArgumentException(String.valueOf(level));
        Map map=new HashMap();
        Iterator it=traces.iterator();
        while (it.hasNext()) {
            TraceRef tr=(TraceRef) it.next();
            List frames=tr.getFrames();
            if (frames.size() < level)
                continue;
            FrameRef keyFrame=(FrameRef) frames.get(frames.size()-level);
            List bucket=(List) map.get(keyFrame);
            if (bucket==null) {
                bucket=new ArrayList();
                map.put(keyFrame, bucket);
            }
            bucket.add(tr);
        }
        return map;
    }

    /** Sums a list of <code>CPUStat</code> and returns a new <code>CPUStat
     *  </code> with the summed values.
     */
    public static CPUStat getSumOfCPUStat(List list) {
        CPUStatSum sum=new CPUStatSum();
        Iterator it=list.iterator();
        while (it.hasNext()) {
            CPUStat stat=(CPUStat) it.next();
            sum.add(stat);
        }
        return sum;
    }

    /** Helper class for summing CPUStat.
     */
    private static class CPUStatSum implements CPUStat {
        private long hits;
        private long time;

        private void add(CPUStat stat) {
            hits += stat.getCPUHitsCount();
            time += stat.getCPUPureTime();
        }

        public long getCPUHitsCount() {
            return hits;
        }
        public long getCPUPureTime() {
            return time;
        }
        
        public void addCPUStatListener( CPUStatListener listener) {
            throw new UnsupportedOperationException();
        }
        public void removeCPUStatListener( CPUStatListener listener) {
            throw new UnsupportedOperationException();
        }
    }
}

/*
 * $Log: BacktraceSupport.java,v $
 * Revision 1.1  2002/08/23 18:13:42  petrul
 * added cpu backtrace view
 *
 */