/**
 * Copyright 2000-2009 DFKI GmbH.
 * All Rights Reserved.  Use is subject to license terms.
 *
 * This file is part of MARY TTS.
 *
 * MARY TTS is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 *
 * 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package marytts.fst;

/**
 * A Pair of Strings.
 * 
 * @author benjaminroth
 */
public class StringPair {

	// private boolean hasHash;
	// private int hash;
	private String string1;
	private String string2;

	public StringPair(String s1, String s2) {
		this.string1 = s1;
		this.string2 = s2;
		// this.hasHash = false;
	}

	public void setString1(String s1) {
		this.string1 = s1;
	}

	public void setString2(String s2) {
		this.string2 = s2;
	}

	public int hashCode() {
		/*
		 * if (!hasHash){ this.hash = 31 * string1.hashCode() + string2.hashCode(); this.hasHash = true; }
		 * 
		 * return this.hash;
		 */
		return 31 * string1.hashCode() + string2.hashCode();
	}

	public boolean equals(Object o) {

		if (o instanceof StringPair && ((StringPair) o).getString1().equals(string1)
				&& ((StringPair) o).getString2().equals(string2))
			return true;

		return false;
	}

	public String getString1() {
		return string1;
	}

	public String getString2() {
		return string2;
	}

	public String toString() {
		return string1 + " " + string2;
	}
}