org.springframework.context.weaving.LoadTimeWeaverAwareProcessor Maven / Gradle / Ivy
/*
* 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
*
* 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
* limitations under the License.
*/
package org.springframework.context.weaving;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.instrument.classloading.LoadTimeWeaver;
import org.springframework.util.Assert;
/**
* {@link org.springframework.beans.factory.config.BeanPostProcessor}
* implementation that passes the context's default {@link LoadTimeWeaver}
* to beans that implement the {@link LoadTimeWeaverAware} interface.
*
* {@link org.springframework.context.ApplicationContext Application contexts}
* will automatically register this with their underlying {@link BeanFactory bean factory},
* provided that a default {@code LoadTimeWeaver} is actually available.
*
*
Applications should not use this class directly.
*
* @author Juergen Hoeller
* @since 2.5
* @see LoadTimeWeaverAware
* @see org.springframework.context.ConfigurableApplicationContext#LOAD_TIME_WEAVER_BEAN_NAME
*/
public class LoadTimeWeaverAwareProcessor implements BeanPostProcessor, BeanFactoryAware {
private LoadTimeWeaver loadTimeWeaver;
private BeanFactory beanFactory;
/**
* Create a new {@code LoadTimeWeaverAwareProcessor} that will
* auto-retrieve the {@link LoadTimeWeaver} from the containing
* {@link BeanFactory}, expecting a bean named
* {@link ConfigurableApplicationContext#LOAD_TIME_WEAVER_BEAN_NAME "loadTimeWeaver"}.
*/
public LoadTimeWeaverAwareProcessor() {
}
/**
* Create a new {@code LoadTimeWeaverAwareProcessor} for the given
* {@link LoadTimeWeaver}.
*
If the given {@code loadTimeWeaver} is {@code null}, then a
* {@code LoadTimeWeaver} will be auto-retrieved from the containing
* {@link BeanFactory}, expecting a bean named
* {@link ConfigurableApplicationContext#LOAD_TIME_WEAVER_BEAN_NAME "loadTimeWeaver"}.
* @param loadTimeWeaver the specific {@code LoadTimeWeaver} that is to be used
*/
public LoadTimeWeaverAwareProcessor(LoadTimeWeaver loadTimeWeaver) {
this.loadTimeWeaver = loadTimeWeaver;
}
/**
* Create a new {@code LoadTimeWeaverAwareProcessor}.
*
The {@code LoadTimeWeaver} will be auto-retrieved from
* the given {@link BeanFactory}, expecting a bean named
* {@link ConfigurableApplicationContext#LOAD_TIME_WEAVER_BEAN_NAME "loadTimeWeaver"}.
* @param beanFactory the BeanFactory to retrieve the LoadTimeWeaver from
*/
public LoadTimeWeaverAwareProcessor(BeanFactory beanFactory) {
this.beanFactory = beanFactory;
}
@Override
public void setBeanFactory(BeanFactory beanFactory) {
this.beanFactory = beanFactory;
}
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
if (bean instanceof LoadTimeWeaverAware) {
LoadTimeWeaver ltw = this.loadTimeWeaver;
if (ltw == null) {
Assert.state(this.beanFactory != null,
"BeanFactory required if no LoadTimeWeaver explicitly specified");
ltw = this.beanFactory.getBean(
ConfigurableApplicationContext.LOAD_TIME_WEAVER_BEAN_NAME, LoadTimeWeaver.class);
}
((LoadTimeWeaverAware) bean).setLoadTimeWeaver(ltw);
}
return bean;
}
@Override
public Object postProcessAfterInitialization(Object bean, String name) {
return bean;
}
}