1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.utils.datastructures;
15 * A generic Triple (3-tuple) structure for containing three object instances of
18 * @param <T1> type of first element
19 * @param <T2> type of second element
20 * @param <T3> type of third element
22 public final class Triple<T1, T2, T3> {
23 public final T1 first;
24 public final T2 second;
25 public final T3 third;
26 private final int hash;
28 public static <T1, T2, T3> Triple<T1, T2, T3> make(T1 t1, T2 t2, T3 t3) {
29 return new Triple<T1, T2, T3>(t1, t2, t3);
32 public Triple(T1 first, T2 second, T3 third) {
36 this.hash = makeHash();
40 public boolean equals(Object obj) {
43 if (!(obj.getClass().equals(this.getClass())))
45 Triple<?, ?, ?> other = (Triple<?, ?, ?>) obj;
46 if (other.first != first && (other.first == null || !other.first.equals(first)))
48 if (other.second != second && (other.second == null || !other.second.equals(second)))
50 if (other.third != third && (other.third == null || !other.third.equals(third)))
56 public int hashCode() {
61 public String toString() {
62 return "<"+first+", "+second+", "+third+">";
65 private int makeHash() {
66 return (first == null ? 0 : first.hashCode()) + (second == null ? 0 : second.hashCode())*31 + (third == null ? 0 : third.hashCode())*41;