001    /**
002     * Copyright (c) 2000-2013 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.kernel.increment;
016    
017    import com.liferay.portal.kernel.exception.SystemException;
018    
019    import java.lang.reflect.Constructor;
020    
021    /**
022     * @author Shuyang Zhou
023     */
024    public class IncrementFactory {
025    
026            @SuppressWarnings("rawtypes")
027            public static Increment createIncrement(
028                            Class<? extends Increment<?>> counterClass, Object value)
029                    throws SystemException {
030    
031                    if ((counterClass == NumberIncrement.class) &&
032                            (value instanceof Number)) {
033    
034                            return new NumberIncrement((Number)value);
035                    }
036    
037                    try {
038                            Constructor<? extends Increment<?>> constructor =
039                                    counterClass.getConstructor(value.getClass());
040    
041                            return constructor.newInstance(value);
042                    }
043                    catch (Exception e) {
044                            throw new SystemException(e);
045                    }
046            }
047    
048    }