net.siefkes.nlstego.textgen
Class StegoDecoder

java.lang.Object
  net.siefkes.nlstego.textgen.StegoCoder
      net.siefkes.nlstego.textgen.StegoDecoder

public class StegoDecoder
extends StegoCoder

A stego decoder recovers the bit sequences hidden in stego texts. Instances of this class are immutable and thus thread-safe.

Instances of this class are not stateless and must be synchronized externally, if required.

Version:

$Revision: 1.16 $, $Date: 2005/07/12 17:02:20 $, $Author: siefkes $

Author:

Christian Siefkes

Constructor Summary

StegoDecoder(Configuration conf, TextModel model)
Creates a new instance.

Method Summary

byte[]

decode(Reader reader) Reads a stego text and decodes the embedded bit sequence.

Methods inherited from class net.siefkes.nlstego.textgen.StegoCoder

debugBits, debugSingleton, filterFirst, getTextModel, resetState, toString, updateState

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

StegoDecoder

public StegoDecoder(Configuration conf,
                    TextModel model)

Creates a new instance.

Parameters:

conf - the configuration to use

model - the text model to use

Method Detail

decode

public byte[] decode(Reader reader)
              throws IOException

Reads a stego text and decodes the embedded bit sequence.

Parameters:

reader - reader containing the stego text to decode; not closed by this method

Returns:

outStream the decoded bit sequence is written to this stream

Throws:

IOException - if an I/O error occurs