1090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson/* 2090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * Copyright (C) 2007 Google Inc. 3090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * 4090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * Licensed under the Apache License, Version 2.0 (the "License"); 5090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * you may not use this file except in compliance with the License. 6090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * You may obtain a copy of the License at 7090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * 8090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 9090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * 10090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * Unless required by applicable law or agreed to in writing, software 11090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 12090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * See the License for the specific language governing permissions and 14090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * limitations under the License. 15090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson */ 16090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 17090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonpackage com.google.common.collect; 18090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 19090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonimport com.google.common.annotations.GwtCompatible; 20090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonimport com.google.common.base.Objects; 21090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 22090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonimport java.util.Map.Entry; 23090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 24090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonimport javax.annotation.Nullable; 25090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 26090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson/** 27090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * Implementation of the {@code equals}, {@code hashCode}, and {@code toString} 28090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * methods of {@code Entry}. 29090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * 30090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * @author Jared Levy 31090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson */ 32090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson@GwtCompatible 33090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilsonabstract class AbstractMapEntry<K, V> implements Entry<K, V> { 34090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 35090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public abstract K getKey(); 36090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 37090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public abstract V getValue(); 38090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 39090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson public V setValue(V value) { 40090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson throw new UnsupportedOperationException(); 41090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 42090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 43090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson @Override public boolean equals(@Nullable Object object) { 44090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson if (object instanceof Entry) { 45090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson Entry<?, ?> that = (Entry<?, ?>) object; 46090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return Objects.equal(this.getKey(), that.getKey()) 47090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson && Objects.equal(this.getValue(), that.getValue()); 48090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 49090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return false; 50090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 51090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 52090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson @Override public int hashCode() { 53090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson K k = getKey(); 54090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson V v = getValue(); 55090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return ((k == null) ? 0 : k.hashCode()) ^ ((v == null) ? 0 : v.hashCode()); 56090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 57090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson 58090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson /** 59090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson * Returns a string representation of the form <code>{key}={value}</code>. 60090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson */ 61090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson @Override public String toString() { 62090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson return getKey() + "=" + getValue(); 63090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson } 64090f9b4c879985bc747c214f82c62471e60c7742Jesse Wilson} 65