001/*-------------------------------------------------------------------------+
002|                                                                          |
003| Copyright 2005-2011 The ConQAT Project                                   |
004|                                                                          |
005| Licensed under the Apache License, Version 2.0 (the "License");          |
006| you may not use this file except in compliance with the License.         |
007| 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+-------------------------------------------------------------------------*/
017package org.conqat.lib.commons.collections;
018
019import java.util.HashMap;
020import java.util.Map;
021
022/**
023 * This class assigns unique ids to objects. The id creation is based on
024 * <code>hashCode()/equals()</code>-semantics.
025 *
026 * <p>
027 * Note that obtaining a unique id from this class for an object prevents it
028 * from being garbage collected.
029 *
030 *
031 * @author Florian Deissenboeck
032 */
033public class IdManager<K> extends IdManagerBase<K> {
034
035        /**
036         * Create new id manager
037         *
038         */
039        public IdManager() {
040                super(new HashMap<K, Integer>());
041        }
042
043        /**
044         * Creates a new id manager that used the given map as initial object->id
045         * map.
046         */
047        public IdManager(Map<K, Integer> initialMap) {
048                super(initialMap);
049        }
050
051}