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.
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/* $Id: DSCEvent.java 750418 2009-03-05 11:03:54Z vhennebert $ */

package org.apache.xmlgraphics.ps.dsc.events;

import java.io.IOException;

import org.apache.xmlgraphics.ps.PSGenerator;
import org.apache.xmlgraphics.ps.dsc.DSCParserConstants;


Interface representing a DSC event. A DSC event can be a DSC comment, a PostScript comment
or a line of PostScript code.

/**
 * Interface representing a DSC event. A DSC event can be a DSC comment, a PostScript comment
 * or a line of PostScript code.
 */
public interface DSCEvent extends DSCParserConstants {

    
Returns the event type.

Returns:the event type (see DSCParserConstants)
/**
     * Returns the event type.
     * @return the event type (see {@link DSCParserConstants})
     */
    int getEventType();

    
Casts this instance to a DSCComment if possible.

Throws:
Returns:this event as a DSCComment
/**
     * Casts this instance to a DSCComment if possible.
     * @return this event as a DSCComment
     * @throws ClassCastException if the event is no DSCComment
     */
    DSCComment asDSCComment();

    
Casts this instance to a PostScriptLine if possible.

Throws:
Returns:this event as a PostScriptLine
/**
     * Casts this instance to a PostScriptLine if possible.
     * @return this event as a PostScriptLine
     * @throws ClassCastException if the event is no PostScriptLine
     */
    PostScriptLine asLine();

    
Indicates whether the instance is a DSC comment.

Returns:true if the instance is a DSC comment
/**
     * Indicates whether the instance is a DSC comment.
     * @return true if the instance is a DSC comment
     */
    boolean isDSCComment();

    
Indicates whether the instance is a PostScript comment.

Returns:true if the instance is a PostScript comment
/**
     * Indicates whether the instance is a PostScript comment.
     * @return true if the instance is a PostScript comment
     */
    boolean isComment();

    
Indicates whether the instance is a header comment.

Returns:true if the instance is a header comment
/**
     * Indicates whether the instance is a header comment.
     * @return true if the instance is a header comment
     */
    boolean isHeaderComment();

    
Indicates whether the instance is a PostScript line.

Returns:true if the instance is a PostScript line
/**
     * Indicates whether the instance is a PostScript line.
     * @return true if the instance is a PostScript line
     */
    boolean isLine();

    
Writes the event to the given PSGenerator.

Params:
  • gen – the PSGenerator to write to
Throws:
/**
     * Writes the event to the given PSGenerator.
     * @param gen the PSGenerator to write to
     * @throws IOException In case of an I/O error
     */
    void generate(PSGenerator gen) throws IOException;

}