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.image;
016    
017    import com.liferay.portal.kernel.image.Hook;
018    import com.liferay.portal.kernel.log.Log;
019    import com.liferay.portal.kernel.log.LogFactoryUtil;
020    import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
021    import com.liferay.portal.util.PropsValues;
022    
023    /**
024     * @author Jorge Ferrer
025     */
026    public class HookFactory {
027    
028            public static Hook getInstance() {
029                    if (_hook == null) {
030                            if (_log.isDebugEnabled()) {
031                                    _log.debug("Instantiate " + PropsValues.IMAGE_HOOK_IMPL);
032                            }
033    
034                            ClassLoader classLoader = PortalClassLoaderUtil.getClassLoader();
035    
036                            try {
037                                    _hook = (Hook)classLoader.loadClass(
038                                            PropsValues.IMAGE_HOOK_IMPL).newInstance();
039                            }
040                            catch (Exception e) {
041                                    _log.error(e, e);
042                            }
043                    }
044    
045                    if (_log.isDebugEnabled()) {
046                            _log.debug("Return " + _hook.getClass().getName());
047                    }
048    
049                    return _hook;
050            }
051    
052            public static void setInstance(Hook hook) {
053                    if (_log.isDebugEnabled()) {
054                            _log.debug("Set " + hook.getClass().getName());
055                    }
056    
057                    _hook = hook;
058            }
059    
060            private static Log _log = LogFactoryUtil.getLog(HookFactory.class);
061    
062            private static Hook _hook;
063    
064    }