spring AspectJAopUtils 源码
spring AspectJAopUtils 代码
文件路径：/spring-aop/src/main/java/org/springframework/aop/aspectj/AspectJAopUtils.java
/*
* Copyright 2002-2012 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
*
* https://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.aspectj;
import org.aopalliance.aop.Advice;
import org.springframework.aop.Advisor;
import org.springframework.aop.AfterAdvice;
import org.springframework.aop.BeforeAdvice;
import org.springframework.lang.Nullable;
/**
* Utility methods for dealing with AspectJ advisors.
*
* @author Adrian Colyer
* @author Juergen Hoeller
* @since 2.0
*/
public abstract class AspectJAopUtils {
/**
* Return {@code true} if the advisor is a form of before advice.
*/
public static boolean isBeforeAdvice(Advisor anAdvisor) {
AspectJPrecedenceInformation precedenceInfo = getAspectJPrecedenceInformationFor(anAdvisor);
if (precedenceInfo != null) {
return precedenceInfo.isBeforeAdvice();
}
return (anAdvisor.getAdvice() instanceof BeforeAdvice);
}
/**
* Return {@code true} if the advisor is a form of after advice.
*/
public static boolean isAfterAdvice(Advisor anAdvisor) {
AspectJPrecedenceInformation precedenceInfo = getAspectJPrecedenceInformationFor(anAdvisor);
if (precedenceInfo != null) {
return precedenceInfo.isAfterAdvice();
}
return (anAdvisor.getAdvice() instanceof AfterAdvice);
}
/**
* Return the AspectJPrecedenceInformation provided by this advisor or its advice.
* If neither the advisor nor the advice have precedence information, this method
* will return {@code null}.
*/
@Nullable
public static AspectJPrecedenceInformation getAspectJPrecedenceInformationFor(Advisor anAdvisor) {
if (anAdvisor instanceof AspectJPrecedenceInformation) {
return (AspectJPrecedenceInformation) anAdvisor;
}
Advice advice = anAdvisor.getAdvice();
if (advice instanceof AspectJPrecedenceInformation) {
return (AspectJPrecedenceInformation) advice;
}
return null;
}
}
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