1 package org.robolectric.util; 2 3 /* 4 * Copyright (C) 2009 The Android Open Source Project 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 /** 20 * Container to ease passing around a tuple of two objects. 21 * 22 * @param <F> First type. 23 * @param <S> Second type. 24 */ 25 public class Pair<F, S> { 26 public final F first; 27 public final S second; 28 Pair(F first, S second)29 public Pair(F first, S second) { 30 this.first = first; 31 this.second = second; 32 } 33 34 @Override equals(Object o)35 public boolean equals(Object o) { 36 if (!(o instanceof Pair)) { 37 return false; 38 } 39 Pair<?, ?> p = (Pair<?, ?>) o; 40 return equal(p.first, first) && equal(p.second, second); 41 } 42 43 @Override hashCode()44 public int hashCode() { 45 return (first == null ? 0 : first.hashCode()) ^ (second == null ? 0 : second.hashCode()); 46 } 47 create(A a, B b)48 public static <A, B> Pair <A, B> create(A a, B b) { 49 return new Pair<>(a, b); 50 } 51 equal(Object a, Object b)52 private static boolean equal(Object a, Object b) { 53 return a == b || (a != null && a.equals(b)); 54 } 55 } 56