Java tutorial
/* * #%L * Alfresco Repository * %% * Copyright (C) 2005 - 2016 Alfresco Software Limited * %% * This file is part of the Alfresco software. * If the software was purchased under a paid Alfresco license, the terms of * the paid license agreement will prevail. Otherwise, the software is * provided under the following open source license terms: * * Alfresco is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Alfresco is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with Alfresco. If not, see <http://www.gnu.org/licenses/>. * #L% */ package org.alfresco.util; import org.apache.commons.lang.StringUtils; import org.springframework.beans.MutablePropertyValues; import org.springframework.beans.PropertyValue; import org.springframework.beans.factory.NoSuchBeanDefinitionException; import org.springframework.beans.factory.config.BeanDefinition; import org.springframework.beans.factory.config.BeanFactoryPostProcessor; import org.springframework.beans.factory.config.ConfigurableListableBeanFactory; /** * Extends the definition of a bean with another. * <p> * Implements bean factory post processor. * * @author Roy Wetherall * @since 5.0 */ public class BeanExtender implements BeanFactoryPostProcessor { /** name of bean to extend */ private String beanName; /** extending bean name */ private String extendingBeanName; /** * @param beanName bean name */ public void setBeanName(String beanName) { this.beanName = beanName; } /** * @param extendingBeanName extending bean name */ public void setExtendingBeanName(String extendingBeanName) { this.extendingBeanName = extendingBeanName; } /** * @see org.springframework.beans.factory.config.BeanFactoryPostProcessor#postProcessBeanFactory(org.springframework.beans.factory.config.ConfigurableListableBeanFactory) */ @Override public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) { ParameterCheck.mandatory("beanName", beanName); ParameterCheck.mandatory("extendingBeanName", extendingBeanName); // check for bean name if (!beanFactory.containsBean(beanName)) { throw new NoSuchBeanDefinitionException("Can't find bean '" + beanName + "' to be extended."); } // check for extending bean if (!beanFactory.containsBean(extendingBeanName)) { throw new NoSuchBeanDefinitionException("Can't find bean '" + extendingBeanName + "' that is going to extend original bean definition."); } // get the bean definitions BeanDefinition beanDefinition = beanFactory.getBeanDefinition(beanName); BeanDefinition extendingBeanDefinition = beanFactory.getBeanDefinition(extendingBeanName); // update class if (StringUtils.isNotBlank(extendingBeanDefinition.getBeanClassName()) && !beanDefinition.getBeanClassName().equals(extendingBeanDefinition.getBeanClassName())) { beanDefinition.setBeanClassName(extendingBeanDefinition.getBeanClassName()); } // update properties MutablePropertyValues properties = beanDefinition.getPropertyValues(); MutablePropertyValues extendingProperties = extendingBeanDefinition.getPropertyValues(); for (PropertyValue propertyValue : extendingProperties.getPropertyValueList()) { properties.add(propertyValue.getName(), propertyValue.getValue()); } } }