http://xmlgraphics.apache.org/commons/: Apache XML Graphics Commons is a library that consists of several reusable components used by Apache Batik and Apache FOP. Many of these components can easily be used separately outside the domains of SVG and XSL-FO. (Apache Software Foundation) 
/*
 * 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.
 */

/* $Id: DSCListener.java 727407 2008-12-17 15:05:45Z jeremias $ */

package org.apache.xmlgraphics.ps.dsc;

import java.io.IOException;

import org.apache.xmlgraphics.ps.dsc.events.DSCEvent;


Listener interface for the DSC parser. It can be used to be notified

/**
 * Listener interface for the DSC parser. It can be used to be notified
 */
public interface DSCListener {

    
Called for each DSC event. You can call methods on the DSC parser to skip comments,
for example. But implementations need to be good citizens and take into account that
multiple listeners can be active at the same time and that they might interfere with
other listeners. When returning from the call, state information such as filters should
be restored.

Params:
  • event – the DSC event
  • parser – the DSC parser
Throws:
/**
     * Called for each DSC event. You can call methods on the DSC parser to skip comments,
     * for example. But implementations need to be good citizens and take into account that
     * multiple listeners can be active at the same time and that they might interfere with
     * other listeners. When returning from the call, state information such as filters should
     * be restored.
     * @param event the DSC event
     * @param parser the DSC parser
     * @throws IOException if an I/O error occurs
     * @throws DSCException if a DSC-specific error occurs
     */
    void processEvent(DSCEvent event, DSCParser parser) throws IOException, DSCException;

}