// PathVisio,
// a tool for data visualization and analysis using Biological Pathways
// Copyright 2006-2011 BiGCaT Bioinformatics
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package org.pathvisio.core.debug;


/**
   A simple helper class for speed optimizations
*/
public class StopWatch
{
	boolean running;
	long start;
	long last;

	public void start() {
		start = System.currentTimeMillis();
		running = true;
	}

	public long stop() {
		last = System.currentTimeMillis() - start;
		running = false;
		return last;
	}

	public long look() {
		if(running) return System.currentTimeMillis() - start;
		return last;
	}

	public void stopToLog(String msg) {
		Logger.log.trace(msg + "\t" + stop());
	}
}