/*
 * Copyright 2002-2017 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
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package org.springframework.aop.config;

import org.springframework.aop.aspectj.AspectInstanceFactory;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.core.Ordered;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;

Implementation of AspectInstanceFactory that locates the aspect from the BeanFactory using a configured bean name.
Author:Rob Harrop, Juergen Hoeller
Since:2.0
/** * Implementation of {@link AspectInstanceFactory} that locates the aspect from the * {@link org.springframework.beans.factory.BeanFactory} using a configured bean name. * * @author Rob Harrop * @author Juergen Hoeller * @since 2.0 */
public class SimpleBeanFactoryAwareAspectInstanceFactory implements AspectInstanceFactory, BeanFactoryAware { @Nullable private String aspectBeanName; @Nullable private BeanFactory beanFactory;
Set the name of the aspect bean. This is the bean that is returned when calling getAspectInstance().
/** * Set the name of the aspect bean. This is the bean that is returned when calling * {@link #getAspectInstance()}. */
public void setAspectBeanName(String aspectBeanName) { this.aspectBeanName = aspectBeanName; } @Override public void setBeanFactory(BeanFactory beanFactory) { this.beanFactory = beanFactory; Assert.notNull(this.aspectBeanName, "'aspectBeanName' is required"); }
Look up the aspect bean from the BeanFactory and returns it.
See Also:
/** * Look up the aspect bean from the {@link BeanFactory} and returns it. * @see #setAspectBeanName */
@Override public Object getAspectInstance() { Assert.state(this.beanFactory != null, "No BeanFactory set"); Assert.state(this.aspectBeanName != null, "No 'aspectBeanName' set"); return this.beanFactory.getBean(this.aspectBeanName); } @Override @Nullable public ClassLoader getAspectClassLoader() { if (this.beanFactory instanceof ConfigurableBeanFactory) { return ((ConfigurableBeanFactory) this.beanFactory).getBeanClassLoader(); } else { return ClassUtils.getDefaultClassLoader(); } } @Override public int getOrder() { if (this.beanFactory != null && this.aspectBeanName != null && this.beanFactory.isSingleton(this.aspectBeanName) && this.beanFactory.isTypeMatch(this.aspectBeanName, Ordered.class)) { return ((Ordered) this.beanFactory.getBean(this.aspectBeanName)).getOrder(); } return Ordered.LOWEST_PRECEDENCE; } }