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.util;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.util.Validator;
020    
021    /**
022     * @author Brian Wing Shun Chan
023     */
024    public class LayoutCloneFactory {
025    
026            public static LayoutClone getInstance() {
027                    if (_layoutClone == null) {
028                            if (Validator.isNotNull(PropsValues.LAYOUT_CLONE_IMPL)) {
029                                    if (_log.isDebugEnabled()) {
030                                            _log.debug("Instantiate " + PropsValues.LAYOUT_CLONE_IMPL);
031                                    }
032    
033                                    ClassLoader classLoader =
034                                            ClassLoaderUtil.getPortalClassLoader();
035    
036                                    try {
037                                            _layoutClone = (LayoutClone)classLoader.loadClass(
038                                                    PropsValues.LAYOUT_CLONE_IMPL).newInstance();
039                                    }
040                                    catch (Exception e) {
041                                            _log.error(e, e);
042                                    }
043                            }
044                    }
045                    else {
046                            if (_log.isDebugEnabled()) {
047                                    _log.debug("Return " + _layoutClone.getClass().getName());
048                            }
049                    }
050    
051                    return _layoutClone;
052            }
053    
054            private static Log _log = LogFactoryUtil.getLog(LayoutCloneFactory.class);
055    
056            private static LayoutClone _layoutClone;
057    
058    }