001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.geronimo.gbean; 018 019 import java.util.Collection; 020 import java.util.HashMap; 021 import java.util.Map; 022 import java.util.Set; 023 024 025 public class ReferenceMap implements Map, ReferenceCollectionListener { 026 private final Map map; 027 private final Key key; 028 029 /** 030 * Constructs the ReferenceMap using a new instance of 031 * HashMap as the internal map. 032 * 033 * @param collection Must be an instance of ReferenceCollection 034 * @param map The map instance to which references will be added/removed 035 * @param key 036 */ 037 public ReferenceMap(Collection collection, Map map, Key key) { 038 this.map = map; 039 this.key = key; 040 for (Object object : collection) { 041 map.put(key.getKey(object), object); 042 } 043 if (collection instanceof ReferenceCollection) { 044 ((ReferenceCollection)collection).addReferenceCollectionListener(this); 045 } 046 } 047 048 /** 049 * Constructs the ReferenceMap using a new instance of 050 * HashMap as the internal map. 051 * 052 * @param collection Must be an instance of ReferenceCollection 053 * @param key 054 */ 055 public ReferenceMap(Collection collection, Key key) { 056 this(collection, new HashMap(), key); 057 } 058 059 public void memberAdded(ReferenceCollectionEvent event) { 060 map.put(key.getKey(event.getMember()), event.getMember()); 061 } 062 063 public void memberRemoved(ReferenceCollectionEvent event) { 064 map.remove(key.getKey(event.getMember())); 065 } 066 067 public interface Key { 068 public Object getKey(Object object); 069 } 070 071 public int size() { 072 return map.size(); 073 } 074 075 public boolean isEmpty() { 076 return map.isEmpty(); 077 } 078 079 public boolean containsKey(Object key) { 080 return map.containsKey(key); 081 } 082 083 public boolean containsValue(Object value) { 084 return map.containsValue(value); 085 } 086 087 public Object get(Object key) { 088 return map.get(key); 089 } 090 091 public Object put(Object key, Object value) { 092 return map.put(key, value); 093 } 094 095 public Object remove(Object key) { 096 return map.remove(key); 097 } 098 099 public void putAll(Map t) { 100 map.putAll(t); 101 } 102 103 public void clear() { 104 map.clear(); 105 } 106 107 public Set keySet() { 108 return map.keySet(); 109 } 110 111 public Collection values() { 112 return map.values(); 113 } 114 115 public Set entrySet() { 116 return map.entrySet(); 117 } 118 119 public boolean equals(Object o) { 120 return map.equals(o); 121 } 122 123 public int hashCode() { 124 return map.hashCode(); 125 } 126 }