/* ===================================================================
 * UserIndexDeleteInterceptor.java
 * 
 * Created Mar 8, 2005 3:31:47 PM
 * 
 * Copyright (c) 2005 Matt Magoffin (spamsqr@msqr.us)
 * 
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License as 
 * published by the Free Software Foundation; either version 2 of 
 * the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License 
 * along with this program; if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 
 * 02111-1307 USA
 * ===================================================================
 * $Id: UserIndexDeleteInterceptor.java 4 2009-05-01 03:27:53Z msqr $
 * ===================================================================
 */

package magoffin.matt.ieat.aop;

import java.lang.reflect.Method;

import org.springframework.aop.AfterReturningAdvice;

/**
 * Interceptor to support automatic removal of User domain objects from 
 * the search index.
 * 
 * <p>This method expects an <code>Integer</code> value to exist on the 
 * <code>args</code> parameter passed to the 
 * {@link #afterReturning(Object, Method, Object[], Object)} method. It will
 * assume the first Integer object found is the <code>userId</code> of the 
 * user that should be removed from the user index via 
 * {@link magoffin.matt.ieat.biz.RecipeSearchIndexBiz#removeUserFromIndex(Integer)}.</p>
 * 
 * @author Matt Magoffin (spamsqr@msqr.us)
 * @version $Revision: 4 $ $Date: 2009-05-01 15:27:53 +1200 (Fri, 01 May 2009) $
 */
public class UserIndexDeleteInterceptor extends AbstractIndexInterceptor
implements AfterReturningAdvice {

	/* (non-Javadoc)
	 * @see org.springframework.aop.AfterReturningAdvice#afterReturning(java.lang.Object, java.lang.reflect.Method, java.lang.Object[], java.lang.Object)
	 */
	public void afterReturning(Object returnValue, Method method,
			Object[] args, Object target) throws Throwable {
		// assume one parameter is the Integer ID of the User to delete
		Integer userId = null;
		for ( int i = 0; i < args.length && userId == null; i++ ) {
			if ( args[i] instanceof Integer ) {
				userId = (Integer)args[i];
			}
		}
		
		if ( userId == null ) {
			throw new RuntimeException("User ID not available in method arguments");
		}
		
		getRecipeSearchIndexBiz().removeUserFromIndex(userId);
	}

}
