/*
 * Copyright 2002-2018 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
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package org.springframework.aop.config;

import org.springframework.beans.MutablePropertyValues;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanReference;
import org.springframework.beans.factory.parsing.AbstractComponentDefinition;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;

ComponentDefinition that bridges the gap between the advisor bean definition configured by the <aop:advisor> tag and the component definition infrastructure.
Author:Rob Harrop, Juergen Hoeller
Since:2.0
/** * {@link org.springframework.beans.factory.parsing.ComponentDefinition} * that bridges the gap between the advisor bean definition configured * by the {@code <aop:advisor>} tag and the component definition * infrastructure. * * @author Rob Harrop * @author Juergen Hoeller * @since 2.0 */
public class AdvisorComponentDefinition extends AbstractComponentDefinition { private final String advisorBeanName; private final BeanDefinition advisorDefinition; private final String description; private final BeanReference[] beanReferences; private final BeanDefinition[] beanDefinitions; public AdvisorComponentDefinition(String advisorBeanName, BeanDefinition advisorDefinition) { this(advisorBeanName, advisorDefinition, null); } public AdvisorComponentDefinition( String advisorBeanName, BeanDefinition advisorDefinition, @Nullable BeanDefinition pointcutDefinition) { Assert.notNull(advisorBeanName, "'advisorBeanName' must not be null"); Assert.notNull(advisorDefinition, "'advisorDefinition' must not be null"); this.advisorBeanName = advisorBeanName; this.advisorDefinition = advisorDefinition; MutablePropertyValues pvs = advisorDefinition.getPropertyValues(); BeanReference adviceReference = (BeanReference) pvs.get("adviceBeanName"); Assert.state(adviceReference != null, "Missing 'adviceBeanName' property"); if (pointcutDefinition != null) { this.beanReferences = new BeanReference[] {adviceReference}; this.beanDefinitions = new BeanDefinition[] {advisorDefinition, pointcutDefinition}; this.description = buildDescription(adviceReference, pointcutDefinition); } else { BeanReference pointcutReference = (BeanReference) pvs.get("pointcut"); Assert.state(pointcutReference != null, "Missing 'pointcut' property"); this.beanReferences = new BeanReference[] {adviceReference, pointcutReference}; this.beanDefinitions = new BeanDefinition[] {advisorDefinition}; this.description = buildDescription(adviceReference, pointcutReference); } } private String buildDescription(BeanReference adviceReference, BeanDefinition pointcutDefinition) { return "Advisor <advice(ref)='" + adviceReference.getBeanName() + "', pointcut(expression)=[" + pointcutDefinition.getPropertyValues().get("expression") + "]>"; } private String buildDescription(BeanReference adviceReference, BeanReference pointcutReference) { return "Advisor <advice(ref)='" + adviceReference.getBeanName() + "', pointcut(ref)='" + pointcutReference.getBeanName() + "'>"; } @Override public String getName() { return this.advisorBeanName; } @Override public String getDescription() { return this.description; } @Override public BeanDefinition[] getBeanDefinitions() { return this.beanDefinitions; } @Override public BeanReference[] getBeanReferences() { return this.beanReferences; } @Override @Nullable public Object getSource() { return this.advisorDefinition.getSource(); } }