blocks/cocoon-portal/cocoon-portal-impl/src/main/java/org/apache/cocoon/portal/spring/ReceiverBeanPostProcessor.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *      http://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.apache.cocoon.portal.spring;

import org.apache.cocoon.portal.event.EventManager;
import org.apache.cocoon.portal.event.Receiver;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.config.BeanPostProcessor;

/**
 * This is a Spring bean post processor for adding all registered beans
 * implementing the {@link Receiver} interface to the {@link EventManager}.
 *
 * @version $Id$
 */
public class ReceiverBeanPostProcessor
    implements BeanPostProcessor, BeanFactoryAware {

    protected BeanFactory beanFactory;

    /**
     * @see org.springframework.beans.factory.BeanFactoryAware#setBeanFactory(org.springframework.beans.factory.BeanFactory)
     */
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        this.beanFactory = beanFactory;
    }

    /**
     * @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessAfterInitialization(java.lang.Object, java.lang.String)
     */
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        if ( bean instanceof Receiver ) {
            ((EventManager)this.beanFactory.getBean(EventManager.class.getName())).subscribe((Receiver)bean);
        }
        return bean;
    }

    /**
     * @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessBeforeInitialization(java.lang.Object, java.lang.String)
     */
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        // nothing to do
        return bean;
    }
}