| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package java.util; |
| |
| import static java.util.Utility.equalsWithNullCheck; |
| |
| /** |
| * Basic {@link Map.Entry} implementation that implements hashCode, equals, and |
| * toString. |
| */ |
| abstract class AbstractMapEntry<K, V> implements Map.Entry<K, V> { |
| |
| @Override |
| public final boolean equals(Object other) { |
| if (other instanceof Map.Entry) { |
| Map.Entry<?, ?> entry = (Map.Entry<?, ?>) other; |
| if (equalsWithNullCheck(getKey(), entry.getKey()) |
| && equalsWithNullCheck(getValue(), entry.getValue())) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Calculate the hash code using Sun's specified algorithm. |
| */ |
| @Override |
| public final int hashCode() { |
| int keyHash = 0; |
| int valueHash = 0; |
| if (getKey() != null) { |
| keyHash = getKey().hashCode(); |
| } |
| if (getValue() != null) { |
| valueHash = getValue().hashCode(); |
| } |
| return keyHash ^ valueHash; |
| } |
| |
| @Override |
| public final String toString() { |
| return getKey() + "=" + getValue(); |
| } |
| } |