/*
* Copyright 2002-2010 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.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.parsing.BeanComponentDefinition;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.xml.ParserContext;
/**
* Utility class for handling registration of auto-proxy creators used internally
* by the '<code>aop</code>' namespace tags.
*
* <p>Only a single auto-proxy creator can be registered and multiple tags may wish
* to register different concrete implementations. As such this class delegates to
* {@link AopConfigUtils} which wraps a simple escalation protocol. Therefore classes
* may request a particular auto-proxy creator and know that class, <i>or a subclass
* thereof</i>, will eventually be resident in the application context.
*
* @author Rob Harrop
* @author Juergen Hoeller
* @author Mark Fisher
* @since 2.0
* @see AopConfigUtils
*/
public abstract class AopNamespaceUtils {
/**
* The <code>proxy-target-class</code> attribute as found on AOP-related XML tags.
*/
public static final String PROXY_TARGET_CLASS_ATTRIBUTE = "proxy-target-class";
/**
* The <code>expose-proxy</code> attribute as found on AOP-related XML tags.
*/
private static final String EXPOSE_PROXY_ATTRIBUTE = "expose-proxy";
public static void registerAutoProxyCreatorIfNecessary(
ParserContext parserContext, Element sourceElement) {
BeanDefinition beanDefinition = AopConfigUtils.registerAutoProxyCreatorIfNecessary(
parserContext.getRegistry(), parserContext.extractSource(sourceElement));
useClassProxyingIfNecessary(parserContext.getRegistry(), sourceElement);
registerComponentIfNecessary(beanDefinition, parserContext);
}
public static void registerAspectJAutoProxyCreatorIfNecessary(
ParserContext parserContext, Element sourceElement) {
BeanDefinition beanDefinition = AopConfigUtils.registerAspectJAutoProxyCreatorIfNecessary(
parserContext.getRegistry(), parserContext.extractSource(sourceElement));
useClassProxyingIfNecessary(parserContext.getRegistry(), sourceElement);
registerComponentIfNecessary(beanDefinition, parserContext);
}
public static void registerAspectJAnnotationAutoProxyCreatorIfNecessary(
ParserContext parserContext, Element sourceElement) {
BeanDefinition beanDefinition = AopConfigUtils.registerAspectJAnnotationAutoProxyCreatorIfNecessary(
parserContext.getRegistry(), parserContext.extractSource(sourceElement));
useClassProxyingIfNecessary(parserContext.getRegistry(), sourceElement);
registerComponentIfNecessary(beanDefinition, parserContext);
}
/**
* @deprecated since Spring 2.5, in favor of
* {@link #registerAutoProxyCreatorIfNecessary(ParserContext, Element)} and
* {@link AopConfigUtils#registerAutoProxyCreatorIfNecessary(BeanDefinitionRegistry, Object)}
*/
@Deprecated
public static void registerAutoProxyCreatorIfNecessary(ParserContext parserContext, Object source) {
BeanDefinition beanDefinition = AopConfigUtils.registerAutoProxyCreatorIfNecessary(
parserContext.getRegistry(), source);
registerComponentIfNecessary(beanDefinition, parserContext);
}
/**
* @deprecated since Spring 2.5, in favor of
* {@link AopConfigUtils#forceAutoProxyCreatorToUseClassProxying(BeanDefinitionRegistry)}
*/
@Deprecated
public static void forceAutoProxyCreatorToUseClassProxying(BeanDefinitionRegistry registry) {
AopConfigUtils.forceAutoProxyCreatorToUseClassProxying(registry);
}
private static void useClassProxyingIfNecessary(BeanDefinitionRegistry registry, Element sourceElement) {
if (sourceElement != null) {
boolean proxyTargetClass = Boolean.valueOf(sourceElement.getAttribute(PROXY_TARGET_CLASS_ATTRIBUTE));
if (proxyTargetClass) {
AopConfigUtils.forceAutoProxyCreatorToUseClassProxying(registry);
}
boolean exposeProxy = Boolean.valueOf(sourceElement.getAttribute(EXPOSE_PROXY_ATTRIBUTE));
if (exposeProxy) {
AopConfigUtils.forceAutoProxyCreatorToExposeProxy(registry);
}
}
}
private static void registerComponentIfNecessary(BeanDefinition beanDefinition, ParserContext parserContext) {
if (beanDefinition != null) {
BeanComponentDefinition componentDefinition =
new BeanComponentDefinition(beanDefinition, AopConfigUtils.AUTO_PROXY_CREATOR_BEAN_NAME);
parserContext.registerComponent(componentDefinition);
}
}
}