/**
* Copyright (c) 2003, 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
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*/
package org.pdfbox.filter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.pdfbox.io.ASCII85InputStream;
import org.pdfbox.io.ASCII85OutputStream;
import org.pdfbox.cos.COSDictionary;
/**
* This is the used for the ASCIIHexDecode filter.
*
* @author Ben Litchfield (ben@csh.rit.edu)
* @version $Revision: 1.6 $
*/
public class ASCII85Filter implements Filter
{
/**
* This will decode some compressed data.
*
* @param compressedData The compressed byte stream.
* @param result The place to write the uncompressed byte stream.
* @param options The options to use to encode the data.
*
* @throws IOException If there is an error decompressing the stream.
*/
public void decode( InputStream compressedData, OutputStream result, COSDictionary options ) throws IOException
{
ASCII85InputStream is = null;
try
{
is = new ASCII85InputStream(compressedData);
byte[] buffer = new byte[1024];
int amountRead = 0;
while( (amountRead = is.read( buffer, 0, 1024) ) != -1 )
{
result.write(buffer, 0, amountRead);
}
result.flush();
}
finally
{
if( is != null )
{
is.close();
}
}
}
/**
* This will encode some data.
*
* @param rawData The raw data to encode.
* @param result The place to write to encoded results to.
* @param options The options to use to encode the data.
*
* @throws IOException If there is an error compressing the stream.
*/
public void encode( InputStream rawData, OutputStream result, COSDictionary options ) throws IOException
{
ASCII85OutputStream os = new ASCII85OutputStream(result);
byte[] buffer = new byte[1024];
int amountRead = 0;
while( (amountRead = rawData.read( buffer, 0, 1024 )) != -1 )
{
os.write( buffer, 0, amountRead );
}
os.close();
result.flush();
}
}