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
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/* $Id: NestedDocumentHandler.java 1345683 2012-06-03 14:50:33Z gadams $ */

package org.apache.xmlgraphics.ps.dsc;

import java.io.IOException;

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


Interface that is used to delegate the handling of nested documents (EPS files, data sections)
in a PostScript document. The implementation receives a parser instance so it can step forward
until the end of the nested document is reached at which point control is given back to the
original consumer.

 It is suggested to use the more generally usable DSCListener instead. This interface may be deprecated in the future. 
/**
 * Interface that is used to delegate the handling of nested documents (EPS files, data sections)
 * in a PostScript document. The implementation receives a parser instance so it can step forward
 * until the end of the nested document is reached at which point control is given back to the
 * original consumer.
 * <p>
 * It is suggested to use the more generally usable {@link DSCListener} instead. This
 * interface may be deprecated in the future.
 */
public interface NestedDocumentHandler {

    
Handle a DSC event. Implementations may issue additional calls to the DSC parser and may
modify its state. When returning from the call, state information such as filters should
be restored.

Params:
  • event – the DSC event to handle
  • parser – the DSC parser to work with
Throws:
/**
     * Handle a DSC event. Implementations may issue additional calls to the DSC parser and may
     * modify its state. When returning from the call, state information such as filters should
     * be restored.
     * @param event the DSC event to handle
     * @param parser the DSC parser to work with
     * @throws IOException In case of an I/O error
     * @throws DSCException In case of a violation of the DSC spec
     */
    void handle(DSCEvent event, DSCParser parser) throws IOException, DSCException;

}