Java tutorial
/* * Copyright 2007-2009 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.laxser.blitz.util; import java.util.ArrayList; import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.BeanFactoryUtils; import org.springframework.beans.factory.ListableBeanFactory; import org.springframework.beans.factory.config.AutowireCapableBeanFactory; import org.springframework.context.ApplicationContext; /** * @author [qieqie.wang@gmail.com] */ public class SpringUtils { private static Log logger = LogFactory.getLog(SpringUtils.class); public static <T> T getBean(ListableBeanFactory bf, Class<?> beanClass) { String[] names = BeanFactoryUtils.beanNamesForTypeIncludingAncestors(bf, beanClass); @SuppressWarnings("unchecked") T bean = (T) ((names.length == 0) ? null : bf.getBean(names[0])); return bean; } public static String[] getBeanNames(ListableBeanFactory bf, Class<?> beanClass) { return BeanFactoryUtils.beanNamesForTypeIncludingAncestors(bf, beanClass); } @SuppressWarnings("unchecked") public static <T> List<T> getBeans(ListableBeanFactory bf, Class<T> beanClass) { String[] names = BeanFactoryUtils.beanNamesForTypeIncludingAncestors(bf, beanClass); List<T> beans = new ArrayList<T>(names.length); for (String name : names) { beans.add((T) bf.getBean(name)); } return beans; } public static <T> T getBean(ListableBeanFactory bf, String beanName) { @SuppressWarnings("unchecked") T bean = (T) (bf.containsBean(beanName) ? bf.getBean(beanName) : null); return bean; } /** * @param clazz * @param context * @return */ public static <T> T createBean(Class<?> clazz, ApplicationContext context) { @SuppressWarnings("unchecked") T bean = (T) context.getAutowireCapableBeanFactory().createBean(clazz, AutowireCapableBeanFactory.AUTOWIRE_NO, false); if (logger.isDebugEnabled()) { logger.debug("create spring bean: " + bean.getClass() + "@" + bean.hashCode()); } return bean; } /** * @param bean * @param context */ public static <T> T autowire(T bean, ApplicationContext context) { context.getAutowireCapableBeanFactory().autowireBeanProperties(bean, AutowireCapableBeanFactory.AUTOWIRE_NO, false); @SuppressWarnings("unchecked") T ret = (T) context.getAutowireCapableBeanFactory().initializeBean(bean, bean.getClass().getName()); return ret; } }