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.kernel.util;
016    
017    import com.liferay.portal.kernel.security.pacl.permission.PortalRuntimePermission;
018    
019    import java.net.URL;
020    import java.net.URLClassLoader;
021    
022    /**
023     * @author Brian Wing Shun Chan
024     */
025    public class PortalClassLoaderUtil {
026    
027            public static ClassLoader getClassLoader() {
028                    PortalRuntimePermission.checkGetClassLoader("portal");
029    
030                    return _classLoader;
031            }
032    
033            public static boolean isPortalClassLoader(ClassLoader classLoader) {
034                    if ((classLoader == _classLoader) ||
035                            (classLoader == _classLoader.getParent())) {
036    
037                            return true;
038                    }
039    
040                    return false;
041            }
042    
043            public static void setClassLoader(ClassLoader classLoader) {
044                    PortalRuntimePermission.checkSetBeanProperty(
045                            PortalClassLoaderUtil.class);
046    
047                    if (classLoader == null) {
048                            _classLoader = null;
049    
050                            return;
051                    }
052    
053                    Class<?> clazz = classLoader.getClass();
054    
055                    try {
056                            clazz.getMethod("destroy");
057    
058                            _classLoader = new URLClassLoader(new URL[0], classLoader);
059                    }
060                    catch (NoSuchMethodException nsme) {
061                            _classLoader = classLoader;
062                    }
063            }
064    
065            private static ClassLoader _classLoader;
066    
067    }