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/*******************************************************************************
* Copyright (c) 2014 Dennis Wagelaar.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Dennis Wagelaar - initial API and
* implementation and/or initial documentation
*******************************************************************************/
package org.eclipse.m2m.atl.emftvm.profiler;
/**
* Stopwatch utility class.
*
* @author <a href="dwagelaar@gmail.com">Dennis Wagelaar</a>
*/
public class StopWatch {
private long duration;
private long start;
private boolean started;
/**
* Returns <code>true</code> if the stopwatch is started.
*
* @return <code>true</code> if the stopwatch is started
*/
public boolean isStarted() {
return started;
}
/**
* Starts the stopwatch.
*/
public void start() {
if (!isStarted()) {
start = System.nanoTime();
started = true;
}
}
/**
* Stops the stopwatch.
*/
public void stop() {
if (isStarted()) {
duration += System.nanoTime() - start;
started = false;
}
}
/**
* Resets the stopwatch to "0".
*/
public void reset() {
duration = 0L;
start = System.nanoTime();
}
/**
* Returns the measured duration in nanoseconds.
*
* @return the measured duration in nanoseconds
*/
public long getDuration() {
return duration;
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return "StopWatch [isStarted()=" + isStarted() + ", getDuration()=" + getDuration() + "]";
}
}
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