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.security.auth;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
020    import com.liferay.portal.util.PropsValues;
021    
022    /**
023     * @author Brian Wing Shun Chan
024     */
025    public class ScreenNameGeneratorFactory {
026    
027            public static ScreenNameGenerator getInstance() {
028                    if (_screenNameGenerator == null) {
029                            if (_log.isDebugEnabled()) {
030                                    _log.debug(
031                                            "Instantiate " + PropsValues.USERS_SCREEN_NAME_GENERATOR);
032                            }
033    
034                            ClassLoader classLoader = PortalClassLoaderUtil.getClassLoader();
035    
036                            try {
037                                    _screenNameGenerator =
038                                            (ScreenNameGenerator)classLoader.loadClass(
039                                                    PropsValues.USERS_SCREEN_NAME_GENERATOR).newInstance();
040                            }
041                            catch (Exception e) {
042                                    _log.error(e, e);
043                            }
044                    }
045    
046                    if (_log.isDebugEnabled()) {
047                            _log.debug("Return " + _screenNameGenerator.getClass().getName());
048                    }
049    
050                    return _screenNameGenerator;
051            }
052    
053            public static void setInstance(ScreenNameGenerator screenNameGenerator) {
054                    if (_log.isDebugEnabled()) {
055                            _log.debug("Set " + screenNameGenerator.getClass().getName());
056                    }
057    
058                    _screenNameGenerator = screenNameGenerator;
059            }
060    
061            private static Log _log = LogFactoryUtil.getLog(
062                    ScreenNameGeneratorFactory.class);
063    
064            private static ScreenNameGenerator _screenNameGenerator;
065    
066    }