001    /**
002     * Copyright (c) 2000-2011 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    import com.liferay.portlet.social.model.SocialEquityIncrementPayload;
019    
020    import java.lang.reflect.Constructor;
021    
022    /**
023     * @author Shuyang Zhou
024     */
025    public class IncrementFactory {
026    
027            @SuppressWarnings("rawtypes")
028            public static Increment createIncrement(
029                            Class<? extends Increment<?>> counterClass, Object value)
030                    throws SystemException {
031    
032                    if ((counterClass == NumberIncrement.class) &&
033                            (value instanceof Number)) {
034    
035                            return new NumberIncrement((Number)value);
036                    }
037                    else if ((counterClass == SocialEquityIncrement.class) &&
038                                     (value instanceof SocialEquityIncrementPayload)) {
039    
040                            return new SocialEquityIncrement(
041                                    (SocialEquityIncrementPayload)value);
042                    }
043    
044                    try {
045                            Constructor<? extends Increment<?>> constructor =
046                                    counterClass.getConstructor(value.getClass());
047    
048                            return constructor.newInstance(value);
049                    }
050                    catch (Exception e) {
051                            throw new SystemException(e);
052                    }
053            }
054    
055    }