/*
 * 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.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.lang.Nullable;
import org.springframework.util.Assert;

BeanPostProcessor implementation that passes the context's default LoadTimeWeaver to beans that implement the LoadTimeWeaverAware interface.

Application contexts will automatically register this with their underlying bean factory, provided that a default LoadTimeWeaver is actually available.

Applications should not use this class directly.

Author:Juergen Hoeller
See Also:
Since:2.5
/** * {@link org.springframework.beans.factory.config.BeanPostProcessor} * implementation that passes the context's default {@link LoadTimeWeaver} * to beans that implement the {@link LoadTimeWeaverAware} interface. * * <p>{@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. * * <p>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 { @Nullable private LoadTimeWeaver loadTimeWeaver; @Nullable private BeanFactory beanFactory;
Create a new LoadTimeWeaverAwareProcessor that will auto-retrieve the LoadTimeWeaver from the containing BeanFactory, expecting a bean named "loadTimeWeaver".
/** * 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 LoadTimeWeaverAwareProcessor for the given LoadTimeWeaver.

If the given loadTimeWeaver is null, then a LoadTimeWeaver will be auto-retrieved from the containing BeanFactory, expecting a bean named "loadTimeWeaver".

Params:
  • loadTimeWeaver – the specific LoadTimeWeaver that is to be used
/** * Create a new {@code LoadTimeWeaverAwareProcessor} for the given * {@link LoadTimeWeaver}. * <p>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(@Nullable LoadTimeWeaver loadTimeWeaver) { this.loadTimeWeaver = loadTimeWeaver; }
Create a new LoadTimeWeaverAwareProcessor.

The LoadTimeWeaver will be auto-retrieved from the given BeanFactory, expecting a bean named "loadTimeWeaver".

Params:
  • beanFactory – the BeanFactory to retrieve the LoadTimeWeaver from
/** * Create a new {@code LoadTimeWeaverAwareProcessor}. * <p>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; } }