/*
 * Copyright 2004-2006 Graeme Rocher
 *
 * 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
 * 
 *      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.codehaus.groovy.grails.orm.support;

import java.util.Iterator;
import java.util.Map;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.transaction.PlatformTransactionManager;

/**
 * @author Graeme Rocher
 * @since 0.4
 *
 */
public class TransactionManagerPostProcessor implements
		BeanFactoryPostProcessor {

	/* (non-Javadoc)
	 * @see org.springframework.beans.factory.config.BeanFactoryPostProcessor#postProcessBeanFactory(org.springframework.beans.factory.config.ConfigurableListableBeanFactory)
	 */
	public void postProcessBeanFactory(
			ConfigurableListableBeanFactory beanFactory) throws BeansException {
		
		String[] beanNames = beanFactory.getBeanNamesForType(PlatformTransactionManager.class);
		if(beanNames.length > 0) {
			PlatformTransactionManager ptm = (PlatformTransactionManager)beanFactory.getBean(beanNames[0]);
			
			Map beans = beanFactory.getBeansOfType(TransactionManagerAware.class);
			for (Iterator i = beans.values().iterator(); i.hasNext();) {
				TransactionManagerAware tma = (TransactionManagerAware) i.next();
				tma.setTransactionManager(ptm);
			}
		}
	}

}
