001    /**
002     * Copyright (c) 2000-2012 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.bean;
016    
017    import com.liferay.portal.kernel.bean.BeanLocator;
018    import com.liferay.portal.kernel.bean.BeanLocatorException;
019    import com.liferay.portal.kernel.log.Log;
020    import com.liferay.portal.kernel.log.LogFactoryUtil;
021    import com.liferay.portal.kernel.util.ProxyUtil;
022    
023    import java.util.ArrayList;
024    import java.util.List;
025    import java.util.Map;
026    import java.util.concurrent.ConcurrentHashMap;
027    
028    import org.springframework.context.ApplicationContext;
029    
030    /**
031     * @author Brian Wing Shun Chan
032     * @author Miguel Pastor
033     */
034    public class BeanLocatorImpl implements BeanLocator {
035    
036            public static final String VELOCITY_SUFFIX = ".velocity";
037    
038            public BeanLocatorImpl(
039                    ClassLoader classLoader, ApplicationContext applicationContext) {
040    
041                    _classLoader = classLoader;
042                    _applicationContext = applicationContext;
043            }
044    
045            public ApplicationContext getApplicationContext() {
046                    return _applicationContext;
047            }
048    
049            public ClassLoader getClassLoader() {
050                    return _classLoader;
051            }
052    
053            public String[] getNames() {
054                    return _applicationContext.getBeanDefinitionNames();
055            }
056    
057            public Class<?> getType(String name) {
058                    try {
059                            return _applicationContext.getType(name);
060                    }
061                    catch (Exception e) {
062                            throw new BeanLocatorException(e);
063                    }
064            }
065    
066            public <T> Map<String, T> locate(Class<T> clazz) {
067                    try {
068                            return _applicationContext.getBeansOfType(clazz);
069                    }
070                    catch (Exception e) {
071                            throw new BeanLocatorException(e);
072                    }
073            }
074    
075            public Object locate(String name) throws BeanLocatorException {
076                    try {
077                            return doLocate(name);
078                    }
079                    catch (Exception e) {
080                            throw new BeanLocatorException(e);
081                    }
082            }
083    
084            protected Object doLocate(String name) throws Exception {
085                    if (_log.isDebugEnabled()) {
086                            _log.debug("Locating " + name);
087                    }
088    
089                    if (name.endsWith(VELOCITY_SUFFIX)) {
090                            Object bean = _velocityBeans.get(name);
091    
092                            if (bean == null) {
093                                    String originalName = name.substring(
094                                            0, name.length() - VELOCITY_SUFFIX.length());
095    
096                                    bean = _applicationContext.getBean(originalName);
097    
098                                    Class<?> beanClass = bean.getClass();
099    
100                                    Class<?>[] interfaces = beanClass.getInterfaces();
101    
102                                    List<Class<?>> interfacesList = new ArrayList<Class<?>>();
103    
104                                    for (Class<?> clazz : interfaces) {
105                                            try {
106                                                    interfacesList.add(
107                                                            _classLoader.loadClass(clazz.getName()));
108                                            }
109                                            catch (ClassNotFoundException cnfe) {
110                                            }
111                                    }
112    
113                                    bean = ProxyUtil.newProxyInstance(
114                                            _classLoader,
115                                            interfacesList.toArray(new Class<?>[interfacesList.size()]),
116                                            new VelocityBeanHandler(bean, _classLoader));
117    
118                                    _velocityBeans.put(name, bean);
119                            }
120    
121                            return bean;
122                    }
123                    else {
124                            return _applicationContext.getBean(name);
125                    }
126            }
127    
128            private static Log _log = LogFactoryUtil.getLog(BeanLocatorImpl.class);
129    
130            private ApplicationContext _applicationContext;
131            private ClassLoader _classLoader;
132            private Map<String, Object> _velocityBeans =
133                    new ConcurrentHashMap<String, Object>();
134    
135    }