/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* 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.
*/
/*
* $Id: TraceListener.java,v 1.8 2004/02/16 23:00:27 minchau Exp $
*/
package org.apache.xalan.trace;
/**
* Interface the XSL processor calls when it matches a source node, selects a set of source nodes,
* or generates a result node.
* If you want an object instance to be called when a trace event occurs, use the TransformerImpl setTraceListener method.
* @see org.apache.xalan.trace.TracerEvent
* @see org.apache.xalan.trace.TraceManager#addTraceListener
* @xsl.usage advanced
*/
public interface TraceListener extends java.util.EventListener
{
/**
* Method that is called when a trace event occurs.
* The method is blocking. It must return before processing continues.
*
* @param ev the trace event.
*/
public void trace(TracerEvent ev);
/**
* Method that is called just after the formatter listener is called.
*
* @param ev the generate event.
*
* @throws javax.xml.transform.TransformerException
*/
public void selected(SelectionEvent ev) throws javax.xml.transform.TransformerException;
/**
* Method that is called just after the formatter listener is called.
*
* @param ev the generate event.
*/
public void generated(GenerateEvent ev);
}