Pair.java

/**
 * VStar: a statistical analysis tool for variable star data.
 * Copyright (C) 2010  AAVSO (http://www.aavso.org/)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 */
package org.aavso.tools.vstar.util;

/**
 * A generic pair.
 */
public class Pair<T,U> {
	public T first;
	public U second;
	
	public Pair(T first, U second) {
		super();
		this.first = first;
		this.second = second;
	}

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

	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (obj == null) {
			return false;
		}
		if (!(obj instanceof Pair)) {
			return false;
		}
		Pair other = (Pair) obj;
		if (first == null) {
			if (other.first != null) {
				return false;
			}
		} else if (!first.equals(other.first)) {
			return false;
		}
		if (second == null) {
			if (other.second != null) {
				return false;
			}
		} else if (!second.equals(other.second)) {
			return false;
		}
		return true;
	}
}