cn.taketoday.aop.config.AopNamespaceUtils Maven / Gradle / Ivy
/*
* Original Author -> Harry Yang ([email protected]) https://taketoday.cn
* Copyright © TODAY & 2017 - 2022 All Rights Reserved.
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see [http://www.gnu.org/licenses/]
*/
package cn.taketoday.aop.config;
import org.w3c.dom.Element;
import cn.taketoday.beans.factory.config.BeanDefinition;
import cn.taketoday.beans.factory.parsing.BeanComponentDefinition;
import cn.taketoday.beans.factory.support.BeanDefinitionRegistry;
import cn.taketoday.beans.factory.xml.ParserContext;
import cn.taketoday.lang.Nullable;
/**
* Utility class for handling registration of auto-proxy creators used internally
* by the '{@code aop}' namespace tags.
*
* Only a single auto-proxy creator should be registered and multiple configuration
* elements may wish to register different concrete implementations. As such this class
* delegates to {@link cn.taketoday.context.annotation.AutoProxyRegistrar} which
* provides a simple escalation protocol.Callers may request a particular auto-proxy
* creator and know that creator, or a more capable variant thereof, will be
* registered as a post-processor.
*
* @author Rob Harrop
* @author Juergen Hoeller
* @author Mark Fisher
* @author Harry Yang
* @since 4.0 2022/3/7 21:53
*/
public abstract class AopNamespaceUtils {
/**
* The {@code proxy-target-class} attribute as found on AOP-related XML tags.
*/
public static final String PROXY_TARGET_CLASS_ATTRIBUTE = "proxy-target-class";
/**
* The {@code expose-proxy} 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);
}
private static void useClassProxyingIfNecessary(BeanDefinitionRegistry registry, @Nullable Element sourceElement) {
if (sourceElement != null) {
boolean proxyTargetClass = Boolean.parseBoolean(sourceElement.getAttribute(PROXY_TARGET_CLASS_ATTRIBUTE));
if (proxyTargetClass) {
AopConfigUtils.forceAutoProxyCreatorToUseClassProxying(registry);
}
boolean exposeProxy = Boolean.parseBoolean(sourceElement.getAttribute(EXPOSE_PROXY_ATTRIBUTE));
if (exposeProxy) {
AopConfigUtils.forceAutoProxyCreatorToExposeProxy(registry);
}
}
}
private static void registerComponentIfNecessary(@Nullable BeanDefinition beanDefinition, ParserContext parserContext) {
if (beanDefinition != null) {
parserContext.registerComponent(
new BeanComponentDefinition(beanDefinition, AopConfigUtils.AUTO_PROXY_CREATOR_BEAN_NAME));
}
}
}