| 1 | /** |
| 2 | * Licensed to jclouds, Inc. (jclouds) under one or more |
| 3 | * contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. jclouds licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. 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, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.jclouds.collect; |
| 20 | |
| 21 | import java.util.Map.Entry; |
| 22 | |
| 23 | import org.jclouds.javax.annotation.Nullable; |
| 24 | |
| 25 | import com.google.common.base.Objects; |
| 26 | |
| 27 | |
| 28 | public abstract class AbstractMapEntry<K, V> implements Entry<K, V> { |
| 29 | |
| 30 | public abstract K getKey(); |
| 31 | |
| 32 | public abstract V getValue(); |
| 33 | |
| 34 | public V setValue(V value) { |
| 35 | throw new UnsupportedOperationException(); |
| 36 | } |
| 37 | |
| 38 | @Override |
| 39 | public boolean equals(@Nullable Object object) { |
| 40 | if (object instanceof Entry) { |
| 41 | Entry<?, ?> that = (Entry<?, ?>) object; |
| 42 | return Objects.equal(this.getKey(), that.getKey()) && Objects.equal(this.getValue(), that.getValue()); |
| 43 | } |
| 44 | return false; |
| 45 | } |
| 46 | |
| 47 | @Override |
| 48 | public int hashCode() { |
| 49 | K k = getKey(); |
| 50 | V v = getValue(); |
| 51 | return ((k == null) ? 0 : k.hashCode()) ^ ((v == null) ? 0 : v.hashCode()); |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Returns a string representation of the form <code>{key}={value}</code>. |
| 56 | */ |
| 57 | @Override |
| 58 | public String toString() { |
| 59 | return getKey() + "=" + getValue(); |
| 60 | } |
| 61 | } |