ConfigurationClassPostProcessor是Spring中自动装配最核心的类，通过分析各个类的信息封装成BeanDifinition,他是一个后置处理器的类，如果弄懂了ConfigurationClassPostProcessor的处理方式，那么Spring和Spring Boot的装配逻辑也就明白了，此类中有很多递归调用，考虑了很多场景，所以流程图中流程之间的联系较为负责，但是当你看懂了全局以后，无法就是递归、再递归，不放过任何可能。

主要功能如下

1、解析@Configuration的配置类

2、解析@ComponentScan扫描的包

3、解析@ComponentScans扫描的包

4、解析@Import注解

5、解析@Component注解，包含继承了@Component的注解

6、解析@ImportResource

7、解析@Bean

.......

1、能力有限，图有点丑

2、下面是图片，但是在这里持续完善

这里整个类加了注释的代码

/*
 * Copyright 2002-2020 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.context.annotation;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.aop.framework.autoproxy.AutoProxyUtils;
import org.springframework.beans.PropertyValues;
import org.springframework.beans.factory.BeanClassLoaderAware;
import org.springframework.beans.factory.BeanDefinitionStoreException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.annotation.AnnotatedBeanDefinition;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.InstantiationAwareBeanPostProcessorAdapter;
import org.springframework.beans.factory.config.SingletonBeanRegistry;
import org.springframework.beans.factory.parsing.FailFastProblemReporter;
import org.springframework.beans.factory.parsing.PassThroughSourceExtractor;
import org.springframework.beans.factory.parsing.ProblemReporter;
import org.springframework.beans.factory.parsing.SourceExtractor;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
import org.springframework.beans.factory.support.BeanNameGenerator;
import org.springframework.context.EnvironmentAware;
import org.springframework.context.ResourceLoaderAware;
import org.springframework.context.annotation.ConfigurationClassEnhancer.EnhancedConfiguration;
import org.springframework.core.Ordered;
import org.springframework.core.PriorityOrdered;
import org.springframework.core.env.Environment;
import org.springframework.core.env.StandardEnvironment;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.ResourceLoader;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.core.type.MethodMetadata;
import org.springframework.core.type.classreading.CachingMetadataReaderFactory;
import org.springframework.core.type.classreading.MetadataReaderFactory;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;

/**
 * 此类是一个后置处理器的类，主要功能是参与BeanFactory的建造，主要功能如下
 *   1、解析加了@Configuration的配置类
 *   2、解析@ComponentScan扫描的包
 *   3、解析@ComponentScans扫描的包
 *   4、解析@Import注解
 *
 * {@link BeanFactoryPostProcessor} used for bootstrapping processing of
 * {@link Configuration @Configuration} classes.
 *
 * 
Registered by default when using {@code } or
 * {@code }. Otherwise, may be declared manually as
 * with any other BeanFactoryPostProcessor.
 *
 * 
This post processor is priority-ordered as it is important that any
 * {@link Bean} methods declared in {@code @Configuration} classes have
 * their corresponding bean definitions registered before any other
 * {@link BeanFactoryPostProcessor} executes.
 *
 * @author Chris Beams
 * @author Juergen Hoeller
 * @author Phillip Webb
 * @since 3.0
 */
public class ConfigurationClassPostProcessor implements BeanDefinitionRegistryPostProcessor,
		PriorityOrdered, ResourceLoaderAware, BeanClassLoaderAware, EnvironmentAware {

	/**
	 * 使用类的全限定名作为bean的默认生成策略
	 *
	 * A {@code BeanNameGenerator} using fully qualified class names as default bean names.
	 * 
This default for configuration-level import purposes may be overridden through
	 * {@link #setBeanNameGenerator}. Note that the default for component scanning purposes
	 * is a plain {@link AnnotationBeanNameGenerator#INSTANCE}, unless overridden through
	 * {@link #setBeanNameGenerator} with a unified user-level bean name generator.
	 * @since 5.2
	 * @see #setBeanNameGenerator
	 */
	public static final AnnotationBeanNameGenerator IMPORT_BEAN_NAME_GENERATOR =
			new FullyQualifiedAnnotationBeanNameGenerator();

	private static final String IMPORT_REGISTRY_BEAN_NAME =
			ConfigurationClassPostProcessor.class.getName() + \".importRegistry\";


	private final Log logger = LogFactory.getLog(getClass());

	private SourceExtractor sourceExtractor = new PassThroughSourceExtractor();

	private ProblemReporter problemReporter = new FailFastProblemReporter();

	@Nullable
	private Environment environment;

	private ResourceLoader resourceLoader = new DefaultResourceLoader();

	@Nullable
	private ClassLoader beanClassLoader = ClassUtils.getDefaultClassLoader();

	private MetadataReaderFactory metadataReaderFactory = new CachingMetadataReaderFactory();

	private boolean setMetadataReaderFactoryCalled = false;

	private final Set registriesPostProcessed = new HashSet<>();

	private final Set factoriesPostProcessed = new HashSet<>();

	@Nullable
	private ConfigurationClassBeanDefinitionReader reader;

	// 是否使用本地xml配置的beanNameGenerator生成器
	private boolean localBeanNameGeneratorSet = false;

	/* Using short class names as default bean names by default. */
	// 使用短类名作为bean名称生成策略
	private BeanNameGenerator componentScanBeanNameGenerator = AnnotationBeanNameGenerator.INSTANCE;

	/* Using fully qualified class names as default bean names by default. */
	// 使用类的全限定名作为bean默认生成策略
	private BeanNameGenerator importBeanNameGenerator = IMPORT_BEAN_NAME_GENERATOR;


	@Override
	public int getOrder() {
		return Ordered.LOWEST_PRECEDENCE;  // within PriorityOrdered
	}

	/**
	 * Set the {@link SourceExtractor} to use for generated bean definitions
	 * that correspond to {@link Bean} factory methods.
	 */
	public void setSourceExtractor(@Nullable SourceExtractor sourceExtractor) {
		this.sourceExtractor = (sourceExtractor != null ? sourceExtractor : new PassThroughSourceExtractor());
	}

	/**
	 * Set the {@link ProblemReporter} to use.
	 * 
Used to register any problems detected with {@link Configuration} or {@link Bean}
	 * declarations. For instance, an @Bean method marked as {@code final} is illegal
	 * and would be reported as a problem. Defaults to {@link FailFastProblemReporter}.
	 */
	public void setProblemReporter(@Nullable ProblemReporter problemReporter) {
		this.problemReporter = (problemReporter != null ? problemReporter : new FailFastProblemReporter());
	}

	/**
	 * Set the {@link MetadataReaderFactory} to use.
	 * 
Default is a {@link CachingMetadataReaderFactory} for the specified
	 * {@linkplain #setBeanClassLoader bean class loader}.
	 */
	public void setMetadataReaderFactory(MetadataReaderFactory metadataReaderFactory) {
		Assert.notNull(metadataReaderFactory, \"MetadataReaderFactory must not be null\");
		this.metadataReaderFactory = metadataReaderFactory;
		this.setMetadataReaderFactoryCalled = true;
	}

	/**
	 * Set the {@link BeanNameGenerator} to be used when triggering component scanning
	 * from {@link Configuration} classes and when registering {@link Import}\'ed
	 * configuration classes. The default is a standard {@link AnnotationBeanNameGenerator}
	 * for scanned components (compatible with the default in {@link ClassPathBeanDefinitionScanner})
	 * and a variant thereof for imported configuration classes (using unique fully-qualified
	 * class names instead of standard component overriding).
	 * 
Note that this strategy does not apply to {@link Bean} methods.
	 * 
This setter is typically only appropriate when configuring the post-processor as a
	 * standalone bean definition in XML, e.g. not using the dedicated {@code AnnotationConfig*}
	 * application contexts or the {@code } element. Any bean name
	 * generator specified against the application context will take precedence over any set here.
	 * @since 3.1.1
	 * @see AnnotationConfigApplicationContext#setBeanNameGenerator(BeanNameGenerator)
	 * @see AnnotationConfigUtils#CONFIGURATION_BEAN_NAME_GENERATOR
	 */
	public void setBeanNameGenerator(BeanNameGenerator beanNameGenerator) {
		Assert.notNull(beanNameGenerator, \"BeanNameGenerator must not be null\");
		this.localBeanNameGeneratorSet = true;
		this.componentScanBeanNameGenerator = beanNameGenerator;
		this.importBeanNameGenerator = beanNameGenerator;
	}

	@Override
	public void setEnvironment(Environment environment) {
		Assert.notNull(environment, \"Environment must not be null\");
		this.environment = environment;
	}

	@Override
	public void setResourceLoader(ResourceLoader resourceLoader) {
		Assert.notNull(resourceLoader, \"ResourceLoader must not be null\");
		this.resourceLoader = resourceLoader;
		if (!this.setMetadataReaderFactoryCalled) {
			this.metadataReaderFactory = new CachingMetadataReaderFactory(resourceLoader);
		}
	}

	@Override
	public void setBeanClassLoader(ClassLoader beanClassLoader) {
		this.beanClassLoader = beanClassLoader;
		if (!this.setMetadataReaderFactoryCalled) {
			this.metadataReaderFactory = new CachingMetadataReaderFactory(beanClassLoader);
		}
	}


	/**
	 * 定位、加载、解析、注册相关注解
	 *
	 * Derive further bean definitions from the configuration classes in the registry.
	 */
	@Override
	public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) {
		// 根据对应的registry对象生成hashcode值，此对象只会操作一次，如果之前处理过则抛出异常
		int registryId = System.identityHashCode(registry);
		if (this.registriesPostProcessed.contains(registryId)) {
			throw new IllegalStateException(
					\"postProcessBeanDefinitionRegistry already called on this post-processor against \" + registry);
		}
		if (this.factoriesPostProcessed.contains(registryId)) {
			throw new IllegalStateException(
					\"postProcessBeanFactory already called on this post-processor against \" + registry);
		}
		// 将马上要进行处理的registry对象的id值放到已经处理的集合对象中
		this.registriesPostProcessed.add(registryId);

		// 处理配置类的bean定义信息
		processConfigBeanDefinitions(registry);
	}

	/**
	 * 添加CGLIB增强处理及ImportAwareBeanPostProcessor后置处理类
	 *
	 * Prepare the Configuration classes for servicing bean requests at runtime
	 * by replacing them with CGLIB-enhanced subclasses.
	 */
	@Override
	public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {
		int factoryId = System.identityHashCode(beanFactory);
		if (this.factoriesPostProcessed.contains(factoryId)) {
			throw new IllegalStateException(
					\"postProcessBeanFactory already called on this post-processor against \" + beanFactory);
		}
		this.factoriesPostProcessed.add(factoryId);
		if (!this.registriesPostProcessed.contains(factoryId)) {
			// BeanDefinitionRegistryPostProcessor hook apparently not supported...
			// Simply call processConfigurationClasses lazily at this point then.
			processConfigBeanDefinitions((BeanDefinitionRegistry) beanFactory);
		}

		enhanceConfigurationClasses(beanFactory);
		beanFactory.addBeanPostProcessor(new ImportAwareBeanPostProcessor(beanFactory));
	}

	/**
	 * 构建和验证一个类是否被@Configuration修饰，并做相关的解析工作
	 *
	 * 如果你对此方法了解清楚了，那么springboot的自动装配原理就清楚了
	 *
	 * Build and validate a configuration model based on the registry of
	 * {@link Configuration} classes.
	 */
	public void processConfigBeanDefinitions(BeanDefinitionRegistry registry) {
		// 创建存放BeanDefinitionHolder的对象集合
		List configCandidates = new ArrayList<>();
		// 当前registry就是DefaultListableBeanFactory，获取所有已经注册的BeanDefinition的beanName
		String[] candidateNames = registry.getBeanDefinitionNames();

		// 遍历所有要处理的beanDefinition的名称,筛选对应的beanDefinition（被注解修饰的）
		for (String beanName : candidateNames) {
			// 获取指定名称的BeanDefinition对象
			BeanDefinition beanDef = registry.getBeanDefinition(beanName);
			// 如果beanDefinition中的configurationClass属性不等于空，那么意味着已经处理过，输出日志信息
			if (beanDef.getAttribute(ConfigurationClassUtils.CONFIGURATION_CLASS_ATTRIBUTE) != null) {
				if (logger.isDebugEnabled()) {
					logger.debug(\"Bean definition has already been processed as a configuration class: \" + beanDef);
				}
			}
			// 判断当前BeanDefinition是否是一个配置类，并为BeanDefinition设置属性为lite或者full，此处设置属性值是为了后续进行调用
			// 如果Configuration配置proxyBeanMethods代理为true则为full
			// 如果加了@Bean、@Component、@ComponentScan、@Import、@ImportResource注解，则设置为lite
			// 如果配置类上被@Order注解标注，则设置BeanDefinition的order属性值
			else if (ConfigurationClassUtils.checkConfigurationClassCandidate(beanDef, this.metadataReaderFactory)) {
				// 添加到对应的集合对象中
				configCandidates.add(new BeanDefinitionHolder(beanDef, beanName));
			}
		}

		// Return immediately if no @Configuration classes were found
		// 如果没有发现任何配置类，则直接返回
		if (configCandidates.isEmpty()) {
			return;
		}

		// Sort by previously determined @Order value, if applicable
		// 如果适用，则按照先前确定的@Order的值排序
		configCandidates.sort((bd1, bd2) -> {
			int i1 = ConfigurationClassUtils.getOrder(bd1.getBeanDefinition());
			int i2 = ConfigurationClassUtils.getOrder(bd2.getBeanDefinition());
			return Integer.compare(i1, i2);
		});

		// Detect any custom bean name generation strategy supplied through the enclosing application context
		// 判断当前类型是否是SingletonBeanRegistry类型
		SingletonBeanRegistry sbr = null;
		if (registry instanceof SingletonBeanRegistry) {
			// 类型的强制转换
			sbr = (SingletonBeanRegistry) registry;
			// 判断是否有自定义的beanName生成器
			if (!this.localBeanNameGeneratorSet) {
				// 获取自定义的beanName生成器
				BeanNameGenerator generator = (BeanNameGenerator) sbr.getSingleton(
						AnnotationConfigUtils.CONFIGURATION_BEAN_NAME_GENERATOR);
				// 如果有自定义的命名生成策略
 				if (generator != null) {
					//设置组件扫描的beanName生成策略
					this.componentScanBeanNameGenerator = generator;
					// 设置import bean name生成策略
					this.importBeanNameGenerator = generator;
				}
			}
		}

		// 如果环境对象等于空，那么就重新创建新的环境对象
		if (this.environment == null) {
			this.environment = new StandardEnvironment();
		}

		// Parse each @Configuration class
		// 实例化ConfigurationClassParser类，并初始化相关的参数，完成配置类的解析工作
		ConfigurationClassParser parser = new ConfigurationClassParser(
				this.metadataReaderFactory, this.problemReporter, this.environment,
				this.resourceLoader, this.componentScanBeanNameGenerator, registry);

		// 创建两个集合对象，
		// 存放相关的BeanDefinitionHolder对象
		Set candidates = new LinkedHashSet<>(configCandidates);
		// 存放扫描包下的所有bean
		Set alreadyParsed = new HashSet<>(configCandidates.size());
		do {
			// 解析带有@Controller、@Import、@ImportResource、@ComponentScan、@ComponentScans、@Bean的BeanDefinition
			parser.parse(candidates);
			// 将解析完的Configuration配置类进行校验，1、配置类不能是final，2、@Bean修饰的方法必须可以重写以支持CGLIB
			parser.validate();

			// 获取所有的bean,包括扫描的bean对象，@Import导入的bean对象
			Set configClasses = new LinkedHashSet<>(parser.getConfigurationClasses());
			// 清除掉已经解析处理过的配置类
			configClasses.removeAll(alreadyParsed);

			// Read the model and create bean definitions based on its content
			// 判断读取器是否为空，如果为空的话，就创建完全填充好的ConfigurationClass实例的读取器
			if (this.reader == null) {
				this.reader = new ConfigurationClassBeanDefinitionReader(
						registry, this.sourceExtractor, this.resourceLoader, this.environment,
						this.importBeanNameGenerator, parser.getImportRegistry());
			}
			// 核心方法，将完全填充好的ConfigurationClass实例转化为BeanDefinition注册入IOC容器
			this.reader.loadBeanDefinitions(configClasses);
			// 添加到已经处理的集合中
			alreadyParsed.addAll(configClasses);

			candidates.clear();
			// 这里判断registry.getBeanDefinitionCount() > candidateNames.length的目的是为了知道reader.loadBeanDefinitions(configClasses)这一步有没有向BeanDefinitionMap中添加新的BeanDefinition
			// 实际上就是看配置类(例如AppConfig类会向BeanDefinitionMap中添加bean)
			// 如果有，registry.getBeanDefinitionCount()就会大于candidateNames.length
			// 这样就需要再次遍历新加入的BeanDefinition，并判断这些bean是否已经被解析过了，如果未解析，需要重新进行解析
			// 这里的AppConfig类向容器中添加的bean，实际上在parser.parse()这一步已经全部被解析了
			if (registry.getBeanDefinitionCount() > candidateNames.length) {
				String[] newCandidateNames = registry.getBeanDefinitionNames();
				Set oldCandidateNames = new HashSet<>(Arrays.asList(candidateNames));
				Set alreadyParsedClasses = new HashSet<>();
				for (ConfigurationClass configurationClass : alreadyParsed) {
					alreadyParsedClasses.add(configurationClass.getMetadata().getClassName());
				}
				// 如果有未解析的类，则将其添加到candidates中，这样candidates不为空，就会进入到下一次的while的循环中
				for (String candidateName : newCandidateNames) {
					if (!oldCandidateNames.contains(candidateName)) {
						BeanDefinition bd = registry.getBeanDefinition(candidateName);
						if (ConfigurationClassUtils.checkConfigurationClassCandidate(bd, this.metadataReaderFactory) &&
								!alreadyParsedClasses.contains(bd.getBeanClassName())) {
							candidates.add(new BeanDefinitionHolder(bd, candidateName));
						}
					}
				}
				candidateNames = newCandidateNames;
			}
		}
		while (!candidates.isEmpty());

		// Register the ImportRegistry as a bean in order to support ImportAware @Configuration classes
		if (sbr != null && !sbr.containsSingleton(IMPORT_REGISTRY_BEAN_NAME)) {
			sbr.registerSingleton(IMPORT_REGISTRY_BEAN_NAME, parser.getImportRegistry());
		}

		if (this.metadataReaderFactory instanceof CachingMetadataReaderFactory) {
			// Clear cache in externally provided MetadataReaderFactory; this is a no-op
			// for a shared cache since it\'ll be cleared by the ApplicationContext.
			((CachingMetadataReaderFactory) this.metadataReaderFactory).clearCache();
		}
	}

	/**
	 * Post-processes a BeanFactory in search of Configuration class BeanDefinitions;
	 * any candidates are then enhanced by a {@link ConfigurationClassEnhancer}.
	 * Candidate status is determined by BeanDefinition attribute metadata.
	 * @see ConfigurationClassEnhancer
	 */
	public void enhanceConfigurationClasses(ConfigurableListableBeanFactory beanFactory) {
		Map configBeanDefs = new LinkedHashMap<>();
		for (String beanName : beanFactory.getBeanDefinitionNames()) {
			BeanDefinition beanDef = beanFactory.getBeanDefinition(beanName);
			Object configClassAttr = beanDef.getAttribute(ConfigurationClassUtils.CONFIGURATION_CLASS_ATTRIBUTE);

			MethodMetadata methodMetadata = null;
			if (beanDef instanceof AnnotatedBeanDefinition) {
				methodMetadata = ((AnnotatedBeanDefinition) beanDef).getFactoryMethodMetadata();
			}
			if ((configClassAttr != null || methodMetadata != null) && beanDef instanceof AbstractBeanDefinition) {
				// Configuration class (full or lite) or a configuration-derived @Bean method
				// -> resolve bean class at this point...
				AbstractBeanDefinition abd = (AbstractBeanDefinition) beanDef;
				if (!abd.hasBeanClass()) {
					try {
						abd.resolveBeanClass(this.beanClassLoader);
					}
					catch (Throwable ex) {
						throw new IllegalStateException(
								\"Cannot load configuration class: \" + beanDef.getBeanClassName(), ex);
					}
				}
			}
			if (ConfigurationClassUtils.CONFIGURATION_CLASS_FULL.equals(configClassAttr)) {
				if (!(beanDef instanceof AbstractBeanDefinition)) {
					throw new BeanDefinitionStoreException(\"Cannot enhance @Configuration bean definition \'\" +
							beanName + \"\' since it is not stored in an AbstractBeanDefinition subclass\");
				}
				else if (logger.isInfoEnabled() && beanFactory.containsSingleton(beanName)) {
					logger.info(\"Cannot enhance @Configuration bean definition \'\" + beanName +
							\"\' since its singleton instance has been created too early. The typical cause \" +
							\"is a non-static @Bean method with a BeanDefinitionRegistryPostProcessor \" +
							\"return type: Consider declaring such methods as \'static\'.\");
				}
				configBeanDefs.put(beanName, (AbstractBeanDefinition) beanDef);
			}
		}
		if (configBeanDefs.isEmpty()) {
			// nothing to enhance -> return immediately
			return;
		}

		ConfigurationClassEnhancer enhancer = new ConfigurationClassEnhancer();
		for (Map.Entry entry : configBeanDefs.entrySet()) {
			AbstractBeanDefinition beanDef = entry.getValue();
			// If a @Configuration class gets proxied, always proxy the target class
			beanDef.setAttribute(AutoProxyUtils.PRESERVE_TARGET_CLASS_ATTRIBUTE, Boolean.TRUE);
			// Set enhanced subclass of the user-specified bean class
			Class configClass = beanDef.getBeanClass();
			Class enhancedClass = enhancer.enhance(configClass, this.beanClassLoader);
			if (configClass != enhancedClass) {
				if (logger.isTraceEnabled()) {
					logger.trace(String.format(\"Replacing bean definition \'%s\' existing class \'%s\' with \" +
							\"enhanced class \'%s\'\", entry.getKey(), configClass.getName(), enhancedClass.getName()));
				}
				beanDef.setBeanClass(enhancedClass);
			}
		}
	}


	private static class ImportAwareBeanPostProcessor extends InstantiationAwareBeanPostProcessorAdapter {

		private final BeanFactory beanFactory;

		public ImportAwareBeanPostProcessor(BeanFactory beanFactory) {
			this.beanFactory = beanFactory;
		}

		/**
		 * 如果配置类有Configuration注解，会进行动态代理，会实现EnhancedConfiguration接口，里面有个setBeanFactory接口方法，会传入beanFactory
		 * @param pvs
		 * @param bean
		 * @param beanName
		 * @return
		 */
		@Override
		public PropertyValues postProcessProperties(@Nullable PropertyValues pvs, Object bean, String beanName) {
			// Inject the BeanFactory before AutowiredAnnotationBeanPostProcessor\'s
			// postProcessProperties method attempts to autowire other configuration beans.
			if (bean instanceof EnhancedConfiguration) {
				((EnhancedConfiguration) bean).setBeanFactory(this.beanFactory);
			}
			return pvs;
		}

		/**
		 * 如果是ImportAware类型的，就会设置bean的注解信息
		 * @param bean
		 * @param beanName
		 * @return
		 */
		@Override
		public Object postProcessBeforeInitialization(Object bean, String beanName) {
			if (bean instanceof ImportAware) {
				ImportRegistry ir = this.beanFactory.getBean(IMPORT_REGISTRY_BEAN_NAME, ImportRegistry.class);
				AnnotationMetadata importingClass = ir.getImportingClassFor(ClassUtils.getUserClass(bean).getName());
				if (importingClass != null) {
					((ImportAware) bean).setImportMetadata(importingClass);
				}
			}
			return bean;
		}
	}

}