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.module.framework;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.util.ClassLoaderUtil;
020    import com.liferay.portal.kernel.util.FileUtil;
021    import com.liferay.portal.kernel.util.InstanceFactory;
022    import com.liferay.portal.kernel.util.MethodKey;
023    import com.liferay.portal.kernel.util.ReflectionUtil;
024    import com.liferay.portal.kernel.util.ServiceLoader;
025    import com.liferay.portal.security.lang.DoPrivilegedUtil;
026    import com.liferay.portal.util.FileImpl;
027    
028    import java.lang.reflect.Method;
029    
030    import java.net.URL;
031    
032    import java.util.HashMap;
033    import java.util.List;
034    import java.util.Map;
035    
036    /**
037     * @author Miguel Pastor
038     * @author Raymond Aug??
039     */
040    public class ModuleFrameworkAdapterHelper {
041    
042            public static ClassLoader getClassLoader() {
043                    if (_classLoader != null) {
044                            return _classLoader;
045                    }
046    
047                    try {
048                            if (FileUtil.getFile() == null) {
049                                    FileUtil fileUtil = new FileUtil();
050    
051                                    fileUtil.setFile(DoPrivilegedUtil.wrap(new FileImpl()));
052                            }
053    
054                            List<ClasspathResolver> classpathResolvers = ServiceLoader.load(
055                                    ClasspathResolver.class);
056    
057                            ClasspathResolver classpathResolver = classpathResolvers.get(0);
058    
059                            URL[] classpathURLs = classpathResolver.getClasspathURLs();
060    
061                            _classLoader = new ModuleFrameworkClassLoader(
062                                    classpathURLs, ClassLoaderUtil.getPortalClassLoader());
063    
064                            return _classLoader;
065                    }
066                    catch (Exception e) {
067                            _log.error(
068                                    "Unable to configure the class loader for the module " +
069                                            "framework");
070    
071                            throw new RuntimeException(e);
072                    }
073            }
074    
075            public ModuleFrameworkAdapterHelper(String className) {
076                    try {
077                            _adaptedObject = InstanceFactory.newInstance(
078                                    getClassLoader(), className);
079                    }
080                    catch (Exception e) {
081                            _log.error("Unable to load the module framework");
082    
083                            throw new RuntimeException(e);
084                    }
085            }
086    
087            public Object exec(
088                    String methodName, Class<?>[] parameterTypes, Object...parameters) {
089    
090                    try {
091                            Method method = searchMethod(methodName, parameterTypes);
092    
093                            return method.invoke(_adaptedObject, parameters);
094                    }
095                    catch (Exception e) {
096                            _log.error(e, e);
097    
098                            throw new RuntimeException(e);
099                    }
100            }
101    
102            public Object execute(String methodName, Object...parameters) {
103                    Class<?>[] parameterTypes = ReflectionUtil.getParameterTypes(
104                            parameters);
105    
106                    return exec(methodName, parameterTypes, parameters);
107            }
108    
109            protected Method searchMethod(String methodName, Class<?>[] parameterTypes)
110                    throws Exception {
111    
112                    MethodKey methodKey = new MethodKey(
113                            _adaptedObject.getClass(), methodName, parameterTypes);
114    
115                    if (_methods.containsKey(methodKey)) {
116                            return _methods.get(methodKey);
117                    }
118    
119                    Method method = ReflectionUtil.getDeclaredMethod(
120                            _adaptedObject.getClass(), methodName, parameterTypes);
121    
122                    _methods.put(methodKey, method);
123    
124                    return method;
125            }
126    
127            private static final Log _log = LogFactoryUtil.getLog(
128                    ModuleFrameworkAdapterHelper.class);
129    
130            private static ClassLoader _classLoader;
131            private static final Map<MethodKey, Method> _methods = new HashMap<>();
132    
133            private final Object _adaptedObject;
134    
135    }