/*
 * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
 *
 * This file is part of PeerfactSim.KOM.
 * 
 * PeerfactSim.KOM 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 3 of the License, or
 * any later version.
 * 
 * PeerfactSim.KOM 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 PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package de.tud.kom.p2psim.impl.util;

/**
 * Like a {@link Tuple}, but one or both elements can be null. Used for a long time, never documented.
 * 
 * @author ?
 * @version ?
 *
 * @param <A>
 * @param <B>
 */
public class Either<A, B> {
	private A left = null;
	private B right = null;
	
	protected Either(A a, B b) {
	    left = a;
	    right = b;
	}
	
	public boolean hasLeft() {
		return left != null;
	}
	
	public boolean hasRight() {
		return right != null;
	}
	
	public A getLeft() {
		return left;
	}
	
	public B getRight() {
		return right;
	}
}