001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.spi;
018
019/**
020 * Bean post processor.
021 */
022public interface CamelBeanPostProcessor {
023
024    /**
025     * Apply this post processor to the given new bean instance <i>before</i> any bean
026     * initialization callbacks (like <code>afterPropertiesSet</code>
027     * or a custom init-method). The bean will already be populated with property values.
028     * The returned bean instance may be a wrapper around the original.
029     *
030     * @param bean the new bean instance
031     * @param beanName the name of the bean
032     * @return the bean instance to use, either the original or a wrapped one; if
033     * <code>null</code>, no subsequent BeanPostProcessors will be invoked
034     * @throws Exception is thrown if error post processing bean
035     */
036    default Object postProcessBeforeInitialization(Object bean, String beanName) throws Exception {
037        return bean;
038    }
039
040    /**
041     * Apply this post processor to the given new bean instance <i>after</i> any bean
042     * initialization callbacks (like <code>afterPropertiesSet</code>
043     * or a custom init-method). The bean will already be populated with property values.
044     * The returned bean instance may be a wrapper around the original.
045     *
046     * @param bean the new bean instance
047     * @param beanName the name of the bean
048     * @return the bean instance to use, either the original or a wrapped one; if
049     * <code>null</code>, no subsequent BeanPostProcessors will be invoked
050     * @throws Exception is thrown if error post processing bean
051     */
052    default Object postProcessAfterInitialization(Object bean, String beanName) throws Exception {
053        return bean;
054    }
055
056}