MemoryValueMapper.java |
1 /** 2 * Copyright (c) 2000-2007 Liferay, Inc. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 23 package com.liferay.portal.upgrade.util; 24 25 import com.liferay.portal.upgrade.StagnantRowException; 26 27 import java.util.Iterator; 28 import java.util.LinkedHashMap; 29 import java.util.LinkedHashSet; 30 import java.util.Map; 31 import java.util.Set; 32 33 /** 34 * <a href="MemoryValueMapper.java.html"><b><i>View Source</i></b></a> 35 * 36 * @author Alexander Chow 37 * @author Brian Wing Shun Chan 38 * 39 */ 40 public class MemoryValueMapper implements ValueMapper { 41 42 public MemoryValueMapper() { 43 this(new LinkedHashSet()); 44 } 45 46 public MemoryValueMapper(Set exceptions) { 47 _map = new LinkedHashMap(); 48 _exceptions = exceptions; 49 } 50 51 public Object getNewValue(Object oldValue) throws Exception { 52 Object value = _map.get(oldValue); 53 54 if (value == null) { 55 if (_exceptions.contains(oldValue)) { 56 value = oldValue; 57 } 58 else { 59 throw new StagnantRowException(String.valueOf(oldValue)); 60 } 61 } 62 63 return value; 64 } 65 66 public void mapValue(Object oldValue, Object newValue) throws Exception { 67 _map.put(oldValue, newValue); 68 } 69 70 public void appendException(Object exception) { 71 _exceptions.add(exception); 72 } 73 74 public Iterator iterator() throws Exception { 75 return _map.keySet().iterator(); 76 } 77 78 public int size() throws Exception { 79 return _map.size(); 80 } 81 82 public Map getMap() { 83 return _map; 84 } 85 86 private Map _map; 87 private Set _exceptions; 88 89 }