001/* 002 * Copyright 2002-2012 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.aop.aspectj; 018 019import org.aopalliance.aop.Advice; 020 021import org.springframework.aop.Advisor; 022import org.springframework.aop.AfterAdvice; 023import org.springframework.aop.BeforeAdvice; 024 025/** 026 * Utility methods for dealing with AspectJ advisors. 027 * 028 * @author Adrian Colyer 029 * @author Juergen Hoeller 030 * @since 2.0 031 */ 032public abstract class AspectJAopUtils { 033 034 /** 035 * Return {@code true} if the advisor is a form of before advice. 036 */ 037 public static boolean isBeforeAdvice(Advisor anAdvisor) { 038 AspectJPrecedenceInformation precedenceInfo = getAspectJPrecedenceInformationFor(anAdvisor); 039 if (precedenceInfo != null) { 040 return precedenceInfo.isBeforeAdvice(); 041 } 042 return (anAdvisor.getAdvice() instanceof BeforeAdvice); 043 } 044 045 /** 046 * Return {@code true} if the advisor is a form of after advice. 047 */ 048 public static boolean isAfterAdvice(Advisor anAdvisor) { 049 AspectJPrecedenceInformation precedenceInfo = getAspectJPrecedenceInformationFor(anAdvisor); 050 if (precedenceInfo != null) { 051 return precedenceInfo.isAfterAdvice(); 052 } 053 return (anAdvisor.getAdvice() instanceof AfterAdvice); 054 } 055 056 /** 057 * Return the AspectJPrecedenceInformation provided by this advisor or its advice. 058 * If neither the advisor nor the advice have precedence information, this method 059 * will return {@code null}. 060 */ 061 public static AspectJPrecedenceInformation getAspectJPrecedenceInformationFor(Advisor anAdvisor) { 062 if (anAdvisor instanceof AspectJPrecedenceInformation) { 063 return (AspectJPrecedenceInformation) anAdvisor; 064 } 065 Advice advice = anAdvisor.getAdvice(); 066 if (advice instanceof AspectJPrecedenceInformation) { 067 return (AspectJPrecedenceInformation) advice; 068 } 069 return null; 070 } 071 072}