001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.upgrade.util;
016    
017    import com.liferay.portal.kernel.upgrade.StagnantRowException;
018    import com.liferay.portal.kernel.upgrade.util.ValueMapper;
019    
020    /**
021     * @author Brian Wing Shun Chan
022     */
023    public class LazyPKUpgradeColumnImpl extends PKUpgradeColumnImpl {
024    
025            public LazyPKUpgradeColumnImpl(String name) {
026                    super(name, true);
027            }
028    
029            public LazyPKUpgradeColumnImpl(String name, Integer oldColumnType) {
030                    super(name, oldColumnType, true);
031            }
032    
033            public Object getNewValue(Object oldValue) throws Exception {
034                    ValueMapper valueMapper = getValueMapper();
035    
036                    Long newValue = null;
037    
038                    try {
039                            newValue = (Long)valueMapper.getNewValue(oldValue);
040                    }
041                    catch (StagnantRowException sre) {
042                            newValue = new Long(increment());
043    
044                            valueMapper.mapValue(oldValue, newValue);
045                    }
046    
047                    return newValue;
048            }
049    
050    }