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Cobertura is a free Java tool that calculates the percentage of code accessed by tests. It can be used to identify which parts of your Java program are lacking test coverage. It is based on jcoverage.

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/*
 * Cobertura - http://cobertura.sourceforge.net/
 *
 * Copyright (C) 2011 Piotr Tabor
 *
 * Note: This file is dual licensed under the GPL and the Apache
 * Source License (so that it can be used from both the main
 * Cobertura classes and the ant tasks).
 *
 * Cobertura is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * Cobertura is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Cobertura; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

package net.sourceforge.cobertura.instrument.tp;

import java.util.concurrent.atomic.AtomicInteger;

/**
 * Class representing a touch-point connected to a JUMP instruction in source-code.
 * 
 * 
A JUMP touch-point have assigned two counters:
 * 

 * TRUE - touched in case when jump condition is meet
 * FALSE - touched when jump condition is not meet
 * 

 *
 * @author [email protected]
 */
public class JumpTouchPointDescriptor extends TouchPointDescriptor {
	private int counterIdForTrue;
	private int counterIdForFalse;

	public JumpTouchPointDescriptor(int eventId, int currentLine) {
		super(eventId, currentLine);
	}

	public int getCounterIdForFalse() {
		return counterIdForFalse;
	}

	public int getCounterIdForTrue() {
		return counterIdForTrue;
	}

	public void setCounterIdForFalse(int counterIdForFalse) {
		this.counterIdForFalse = counterIdForFalse;
	}

	public void setCounterIdForTrue(int counterIdForTrue) {
		this.counterIdForTrue = counterIdForTrue;
	}

	@Override
	public int assignCounters(AtomicInteger idGenerator) {
		counterIdForFalse = idGenerator.incrementAndGet();
		counterIdForTrue = idGenerator.incrementAndGet();
		return 2;
	}

}