/*
 * Copyright 2008-2020 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.data.jpa.domain.support;

import static org.springframework.data.jpa.util.BeanDefinitionUtils.*;
import static org.springframework.util.StringUtils.*;

import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.aspectj.AnnotationBeanConfigurerAspect;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;

BeanFactoryPostProcessor that ensures that the AnnotationBeanConfigurerAspect aspect is up and running before the EntityManagerFactory gets created as this already instantiates entity listeners and we need to get injection into Configurable to work in them. 
Author:
Oliver Gierke, Thomas Darimont/**
 * {@link BeanFactoryPostProcessor} that ensures that the {@link AnnotationBeanConfigurerAspect} aspect is up and
 * running <em>before</em> the {@link javax.persistence.EntityManagerFactory} gets created as this already instantiates
 * entity listeners and we need to get injection into {@link org.springframework.beans.factory.annotation.Configurable}
 * to work in them.
 *
 * @author Oliver Gierke
 * @author Thomas Darimont
 */
public class AuditingBeanFactoryPostProcessor implements BeanFactoryPostProcessor {

	public static final String BEAN_CONFIGURER_ASPECT_BEAN_NAME = "org.springframework.context.config.internalBeanConfigurerAspect";

	/*
	 * (non-Javadoc)
	 * @see org.springframework.beans.factory.config.BeanFactoryPostProcessor#postProcessBeanFactory(org.springframework.beans.factory.config.ConfigurableListableBeanFactory)
	 */
	@Override
	public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {

		try {
			getBeanDefinition(BEAN_CONFIGURER_ASPECT_BEAN_NAME, beanFactory);
		} catch (NoSuchBeanDefinitionException o_O) {
			throw new IllegalStateException(
					"Invalid auditing setup! Make sure you've used @EnableJpaAuditing or <jpa:auditing /> correctly!", o_O);
		}

		for (String beanName : getEntityManagerFactoryBeanNames(beanFactory)) {
			BeanDefinition definition = getBeanDefinition(beanName, beanFactory);
			definition.setDependsOn(addStringToArray(definition.getDependsOn(), BEAN_CONFIGURER_ASPECT_BEAN_NAME));
		}
	}
}