spring SimpleBeanFactoryAwareAspectInstanceFactory 源码
spring SimpleBeanFactoryAwareAspectInstanceFactory 代码
文件路径：/spring-aop/src/main/java/org/springframework/aop/config/SimpleBeanFactoryAwareAspectInstanceFactory.java
/*
* 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
*
* 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.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 {@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
* {@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 {@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;
}
}
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