Pair.java

package org.sigmah.shared.util;

/*
 * #%L
 * Sigmah
 * %%
 * Copyright (C) 2010 - 2016 URD
 * %%
 * This program 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 (at your option) any later version.
 * 
 * This program 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 this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

/**
 * A simple pair.
 * 
 * @param <L>
 * @param <R>
 * @author Tom Miette (tmiette@ideia.fr)
 */
public class Pair<L, R> {

	public final L left;
	public final R right;

	public Pair(L left, R right) {
		this.left = left;
		this.right = right;
	}

	@SuppressWarnings("rawtypes")
	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (obj == null) {
			return false;
		}
		if (getClass() != obj.getClass()) {
			return false;
		}
		Pair other = (Pair) obj;
		if (left == null) {
			if (other.left != null) {
				return false;
			}
		} else if (!left.equals(other.left)) {
			return false;
		}
		if (right == null) {
			if (other.right != null) {
				return false;
			}
		} else if (!right.equals(other.right)) {
			return false;
		}
		return true;
	}

	public L getLeft() {
		return left;
	}

	public R getRight() {
		return right;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((left == null) ? 0 : left.hashCode());
		result = prime * result + ((right == null) ? 0 : right.hashCode());
		return result;
	}

	@Override
	public String toString() {
		return "(" + left + "," + right + ")";
	}

	public boolean hasNoNulls() {
		return this.getLeft() != null && this.getRight() != null;
	}

}