/**
* Copyright (c) 2003-2004, www.pdfbox.org
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of pdfbox; nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://www.pdfbox.org
*
*/
package org.pdfbox.pdfparser;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.pdfbox.cos.COSBase;
import org.pdfbox.cos.COSDocument;
import org.pdfbox.cos.COSInteger;
import org.pdfbox.cos.COSObject;
import org.pdfbox.cos.COSStream;
/**
* This will parse a PDF 1.5 object stream and extract all of the objects from the stream.
*
* @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
* @version $Revision: 1.6 $
*/
public class PDFObjectStreamParser extends BaseParser
{
private List streamObjects = null;
private List objectNumbers = null;
private COSStream stream;
/**
* Constructor.
*
* @param strm The stream to parse.
* @param doc The document for the current parsing.
*
* @throws IOException If there is an error initializing the stream.
*/
public PDFObjectStreamParser( COSStream strm, COSDocument doc ) throws IOException
{
super( strm.getUnfilteredStream() );
setDocument( doc );
stream = strm;
}
/**
* This will parse the tokens in the stream. This will close the
* stream when it is finished parsing.
*
* @throws IOException If there is an error while parsing the stream.
*/
public void parse() throws IOException
{
try
{
//need to first parse the header.
int numberOfObjects = stream.getInt( "N" );
objectNumbers = new ArrayList( numberOfObjects );
streamObjects = new ArrayList( numberOfObjects );
for( int i=0; i<numberOfObjects; i++ )
{
int objectNumber = readInt();
int offset = readInt();
objectNumbers.add( new Integer( objectNumber ) );
}
COSObject object = null;
COSBase cosObject = null;
int objectCounter = 0;
while( (cosObject = parseDirObject()) != null )
{
object = new COSObject(cosObject);
object.setGenerationNumber( COSInteger.ZERO );
COSInteger objNum =
new COSInteger( ((Integer)objectNumbers.get( objectCounter)).intValue() );
object.setObjectNumber( objNum );
streamObjects.add( object );
objectCounter++;
}
}
finally
{
pdfSource.close();
}
}
/**
* This will get the objects that were parsed from the stream.
*
* @return All of the objects in the stream.
*/
public List getObjects()
{
return streamObjects;
}
}