/* * Copyright (c) 2004 jPOS.org  * * See terms of license at http://jpos.org/license.html * */package org.jpos.util;import java.util.Iterator;/** * A specific log listener that filters all LogEvents that doesn't * contain any exception. * @author Alejandro Revilla * @version $Revision: 1.1 $ $Date: 2004/06/10 01:15:02 $ */public class ExceptionLogFilter implements LogListener {    public ExceptionLogFilter () {        super();    }    public synchronized LogEvent log (LogEvent evt) {        Iterator iter = evt.getPayLoad().iterator();        while (iter.hasNext()) {            if (iter.next() instanceof Throwable)                return evt;        }        return null;    }}