public  void decode(InputStream compressedData,
    OutputStream result,
    COSDictionary options,
    int filterIndex) throws IOException 
{
        int value = 0;
        int firstByte = 0;
        int secondByte = 0;
        while ((firstByte = compressedData.read()) != -1) 
        {
            // always after first char
            while(isWhitespace(firstByte))
            {
                firstByte = compressedData.read();
            }
            if(isEOD(firstByte))
            {
                break;
            }
            if(REVERSE_HEX[firstByte] == -1)
            {
                System.out.println("Invalid Hex Code; int: " + firstByte + " char: " + (char) firstByte);
            }
            value = REVERSE_HEX[firstByte] * 16;
            secondByte = compressedData.read();
            if(isEOD(secondByte)) 
            {
                // second value behaves like 0 in case of EOD
                result.write( value );
                break;
            }
            if(secondByte  >= 0) 
            {
                if(REVERSE_HEX[secondByte] == -1)
                {
                    System.out.println("Invalid Hex Code; int: " + secondByte + " char: " + (char) secondByte);
                }
                value += REVERSE_HEX[secondByte];
            }
            result.write( value );
        }
        result.flush();
}

{@inheritDoc}

 public  void encode(InputStream rawData,
    OutputStream result,
    COSDictionary options,
    int filterIndex) throws IOException 
{
        int byteRead = 0;
        while( (byteRead = rawData.read()) != -1 )
        {
            int value = (byteRead+256)%256;
            result.write( COSHEXTable.TABLE[value] );
        }
        result.flush();
}

{@inheritDoc}