001    /**
002     * Copyright (c) 2000-present 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.cache.ehcache;
016    
017    import com.liferay.portal.kernel.cache.PortalCache;
018    import com.liferay.portal.kernel.cache.PortalCacheWrapper;
019    
020    import net.sf.ehcache.Ehcache;
021    
022    /**
023     * @author Shuyang Zhou
024     */
025    public class EhcacheUnwrapUtil {
026    
027            public static Ehcache getEhcache(PortalCache<?, ?> portalCache) {
028                    PortalCache<?, ?> currentPortalCache = portalCache;
029    
030                    while (currentPortalCache instanceof PortalCacheWrapper) {
031                            PortalCacheWrapper<?, ?> portalCacheWrapper =
032                                    (PortalCacheWrapper<?, ?>)currentPortalCache;
033    
034                            currentPortalCache = portalCacheWrapper.getWrappedPortalCache();
035                    }
036    
037                    if (currentPortalCache instanceof EhcachePortalCache) {
038                            EhcachePortalCache<?, ?> ehcachePortalCache =
039                                    (EhcachePortalCache<?, ?>)currentPortalCache;
040    
041                            return ehcachePortalCache.ehcache;
042                    }
043    
044                    throw new IllegalArgumentException(
045                            "Unable to locate Ehcache from " + portalCache);
046            }
047    
048    }