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.util.AggregateClassLoader;
018    import com.liferay.portal.kernel.util.ClassLoaderPool;
019    import com.liferay.portal.kernel.util.PortalClassLoaderUtil;
020    
021    /**
022     * @author Raymond Aug??
023     * @author Shuyang Zhou
024     */
025    public class ClassLoaderUtil {
026    
027            public static ClassLoader getAggregatePluginsClassLoader(
028                    String[] servletContextNames, boolean addContextClassLoader) {
029    
030                    return _pacl.getAggregatePluginsClassLoader(
031                            servletContextNames, addContextClassLoader);
032            }
033    
034            public static ClassLoader getClassLoader(Class<?> clazz) {
035                    return _pacl.getClassLoader(clazz);
036            }
037    
038            public static ClassLoader getContextClassLoader() {
039                    return _pacl.getContextClassLoader();
040            }
041    
042            public static ClassLoader getPluginClassLoader(String servletContextName) {
043                    return _pacl.getPluginClassLoader(servletContextName);
044            }
045    
046            public static ClassLoader getPortalClassLoader() {
047                    return _pacl.getPortalClassLoader();
048            }
049    
050            public static void setContextClassLoader(ClassLoader classLoader) {
051                    _pacl.setContextClassLoader(classLoader);
052            }
053    
054            public static class NoPACL implements PACL {
055    
056                    @Override
057                    public ClassLoader getAggregatePluginsClassLoader(
058                            String[] servletContextNames, boolean addContextClassLoader) {
059    
060                            ClassLoader[] classLoaders = null;
061    
062                            int offset = 0;
063    
064                            if (addContextClassLoader) {
065                                    classLoaders = new ClassLoader[servletContextNames.length + 1];
066    
067                                    Thread currentThread = Thread.currentThread();
068    
069                                    classLoaders[0] = currentThread.getContextClassLoader();
070    
071                                    offset = 1;
072                            }
073                            else {
074                                    classLoaders = new ClassLoader[servletContextNames.length];
075                            }
076    
077                            for (int i = 0; i < servletContextNames.length; i++) {
078                                    classLoaders[offset + i] = ClassLoaderPool.getClassLoader(
079                                            servletContextNames[i]);
080                            }
081    
082                            return AggregateClassLoader.getAggregateClassLoader(classLoaders);
083                    }
084    
085                    @Override
086                    public ClassLoader getClassLoader(Class<?> clazz) {
087                            return clazz.getClassLoader();
088                    }
089    
090                    @Override
091                    public ClassLoader getContextClassLoader() {
092                            Thread currentThread = Thread.currentThread();
093    
094                            return currentThread.getContextClassLoader();
095                    }
096    
097                    @Override
098                    public ClassLoader getPluginClassLoader(String servletContextName) {
099                            return ClassLoaderPool.getClassLoader(servletContextName);
100                    }
101    
102                    @Override
103                    public ClassLoader getPortalClassLoader() {
104                            return PortalClassLoaderUtil.getClassLoader();
105                    }
106    
107                    @Override
108                    public void setContextClassLoader(ClassLoader classLoader) {
109                            Thread thread = Thread.currentThread();
110    
111                            thread.setContextClassLoader(classLoader);
112                    }
113    
114            }
115    
116            public static interface PACL {
117    
118                    public ClassLoader getAggregatePluginsClassLoader(
119                            String[] servletContextNames, boolean addContextClassLoader);
120    
121                    public ClassLoader getClassLoader(Class<?> clazz);
122    
123                    public ClassLoader getContextClassLoader();
124    
125                    public ClassLoader getPluginClassLoader(String servletContextName);
126    
127                    public ClassLoader getPortalClassLoader();
128    
129                    public void setContextClassLoader(ClassLoader classLoader);
130    
131            }
132    
133            private static PACL _pacl = new NoPACL();
134    
135    }