org.springframework.aop.config.ScopedProxyBeanDefinitionDecorator Maven / Gradle / Ivy
/*
* Copyright 2002-2007 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 org.springframework.aop.config;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.springframework.aop.framework.autoproxy.AutoProxyUtils;
import org.springframework.aop.scope.ScopedProxyFactoryBean;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.beans.factory.xml.BeanDefinitionDecorator;
import org.springframework.beans.factory.xml.ParserContext;
/**
* {@link BeanDefinitionDecorator} responsible for parsing the
* <aop:scoped-proxy/>
tag.
*
* @author Rob Harrop
* @author Juergen Hoeller
* @since 2.0
*/
class ScopedProxyBeanDefinitionDecorator implements BeanDefinitionDecorator {
private static final String PROXY_TARGET_CLASS = "proxy-target-class";
private static final String TARGET_NAME_PREFIX = "scopedTarget.";
public BeanDefinitionHolder decorate(Node node, BeanDefinitionHolder definition, ParserContext parserContext) {
String originalBeanName = definition.getBeanName();
BeanDefinition targetDefinition = definition.getBeanDefinition();
BeanDefinitionRegistry registry = parserContext.getRegistry();
// Create a scoped proxy definition for the original bean name,
// "hiding" the target bean in an internal target definition.
String targetBeanName = TARGET_NAME_PREFIX + originalBeanName;
RootBeanDefinition scopedProxyDefinition = new RootBeanDefinition(ScopedProxyFactoryBean.class);
scopedProxyDefinition.getPropertyValues().addPropertyValue("targetBeanName", targetBeanName);
boolean proxyTargetClass = (!(node instanceof Element) ||
Boolean.valueOf(((Element) node).getAttribute(PROXY_TARGET_CLASS)).booleanValue());
if (proxyTargetClass) {
targetDefinition.setAttribute(AutoProxyUtils.PRESERVE_TARGET_CLASS_ATTRIBUTE, Boolean.TRUE);
// ScopedFactoryBean's "proxyTargetClass" default is TRUE, so we don't need to set it explicitly here.
}
else {
scopedProxyDefinition.getPropertyValues().addPropertyValue("proxyTargetClass", Boolean.FALSE);
}
// The target bean should be ignored in favor of the scoped proxy.
if (targetDefinition instanceof AbstractBeanDefinition) {
((AbstractBeanDefinition) targetDefinition).setAutowireCandidate(false);
}
// Register the target bean as separate bean in the factory.
registry.registerBeanDefinition(targetBeanName, targetDefinition);
// Return the scoped proxy definition as primary bean definition
// (potentially an inner bean).
return new BeanDefinitionHolder(scopedProxyDefinition, originalBeanName);
}
}