org.springframework.beans.factory.support.MergedBeanDefinitionPostProcessor.java Source code

Introduction

Here is the source code for org.springframework.beans.factory.support.MergedBeanDefinitionPostProcessor.java

Source

/*
 * Copyright 2002-2018 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.beans.factory.support;

import org.springframework.beans.factory.config.BeanPostProcessor;

/**
 * Post-processor callback interface for <i>merged</i> bean definitions at runtime.
 * {@link BeanPostProcessor} implementations may implement this sub-interface in order
 * to post-process the merged bean definition (a processed copy of the original bean
 * definition) that the Spring {@code BeanFactory} uses to create a bean instance.
 *
 * <p>The {@link #postProcessMergedBeanDefinition} method may for example introspect
 * the bean definition in order to prepare some cached metadata before post-processing
 * actual instances of a bean. It is also allowed to modify the bean definition but
 * <i>only</i> for definition properties which are actually intended for concurrent
 * modification. Essentially, this only applies to operations defined on the
 * {@link RootBeanDefinition} itself but not to the properties of its base classes.
 *
 * @author Juergen Hoeller
 * @since 2.5
 * @see org.springframework.beans.factory.config.ConfigurableBeanFactory#getMergedBeanDefinition
 */
public interface MergedBeanDefinitionPostProcessor extends BeanPostProcessor {

    /**
     * Post-process the given merged bean definition for the specified bean.
     * @param beanDefinition the merged bean definition for the bean
     * @param beanType the actual type of the managed bean instance
     * @param beanName the name of the bean
     * @see AbstractAutowireCapableBeanFactory#applyMergedBeanDefinitionPostProcessors
     */
    void postProcessMergedBeanDefinition(RootBeanDefinition beanDefinition, Class<?> beanType, String beanName);

    /**
     * A notification that the bean definition for the specified name has been reset,
     * and that this post-processor should clear any metadata for the affected bean.
     * <p>The default implementation is empty.
     * @param beanName the name of the bean
     * @since 5.1
     * @see DefaultListableBeanFactory#resetBeanDefinition
     */
    default void resetBeanDefinition(String beanName) {
    }

}