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     */
033    public class BeanLocatorImpl implements BeanLocator {
034    
035            public static final String VELOCITY_SUFFIX = ".velocity";
036    
037            public BeanLocatorImpl(
038                    ClassLoader classLoader, ApplicationContext applicationContext) {
039    
040                    _classLoader = classLoader;
041                    _applicationContext = applicationContext;
042            }
043    
044            public ApplicationContext getApplicationContext() {
045                    return _applicationContext;
046            }
047    
048            public ClassLoader getClassLoader() {
049                    return _classLoader;
050            }
051    
052            public String[] getNames() {
053                    return _applicationContext.getBeanDefinitionNames();
054            }
055    
056            public Class<?> getType(String name) {
057                    try {
058                            return _applicationContext.getType(name);
059                    }
060                    catch (Exception e) {
061                            throw new BeanLocatorException(e);
062                    }
063            }
064    
065            public Object locate(String name) throws BeanLocatorException {
066                    try {
067                            return doLocate(name);
068                    }
069                    catch (Exception e) {
070                            throw new BeanLocatorException(e);
071                    }
072            }
073    
074            protected Object doLocate(String name) throws Exception {
075                    if (_log.isDebugEnabled()) {
076                            _log.debug("Locating " + name);
077                    }
078    
079                    if (name.endsWith(VELOCITY_SUFFIX)) {
080                            Object bean = _velocityBeans.get(name);
081    
082                            if (bean == null) {
083                                    String originalName = name.substring(
084                                            0, name.length() - VELOCITY_SUFFIX.length());
085    
086                                    bean = _applicationContext.getBean(originalName);
087    
088                                    Class<?> beanClass = bean.getClass();
089    
090                                    Class<?>[] interfaces = beanClass.getInterfaces();
091    
092                                    List<Class<?>> interfacesList = new ArrayList<Class<?>>();
093    
094                                    for (Class<?> clazz : interfaces) {
095                                            try {
096                                                    interfacesList.add(
097                                                            _classLoader.loadClass(clazz.getName()));
098                                            }
099                                            catch (ClassNotFoundException cnfe) {
100                                            }
101                                    }
102    
103                                    bean = ProxyUtil.newProxyInstance(
104                                            _classLoader,
105                                            interfacesList.toArray(new Class<?>[interfacesList.size()]),
106                                            new VelocityBeanHandler(bean, _classLoader));
107    
108                                    _velocityBeans.put(name, bean);
109                            }
110    
111                            return bean;
112                    }
113                    else {
114                            return _applicationContext.getBean(name);
115                    }
116            }
117    
118            private static Log _log = LogFactoryUtil.getLog(BeanLocatorImpl.class);
119    
120            private ApplicationContext _applicationContext;
121            private ClassLoader _classLoader;
122            private Map<String, Object> _velocityBeans =
123                    new ConcurrentHashMap<String, Object>();
124    
125    }