rice.p2p.glacier
Class ErasureCodec

java.lang.Object
  rice.p2p.glacier.ErasureCodec

public class ErasureCodec

extends java.lang.Object

DESCRIBE THE CLASS

Version:

$Id: ErasureCodec.java,v 1.16 2005/08/05 13:54:31 jeffh Exp $

Author:

ahae

Field Summary

protected int	numFragments DESCRIBE THE FIELD
protected int	numSurvivors DESCRIBE THE FIELD

Constructor Summary

ErasureCodec(int _numFragments, int _numSurvivors, Environment env)
Constructor for ErasureCodec.

Method Summary

java.io.Serializable	decode(Fragment[] frag) DESCRIBE THE METHOD
protected void	decodeChunk(int[] buffer, int nExtra, int[] RowInd, boolean[] haveFragment, long[][] InvMat, int[] ColInd) DESCRIBE THE METHOD
void	dump(byte[] data, Logger logger) DESCRIBE THE METHOD
Fragment[]	encode(byte[] bytes, boolean[] generateFragment) DESCRIBE THE METHOD
protected void	encodeChunk(int[] buffer) Input: buffer of size ; first words contain message, rest is zeroes Output: buffer contains fragments
Fragment[]	encodeObject(java.io.Serializable obj, boolean[] generateFragment) DESCRIBE THE METHOD
protected void	initElt() DESCRIBE THE METHOD
static void	main(java.lang.String[] args) DESCRIBE THE METHOD

Methods inherited from class java.lang.Object

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

Field Detail

numFragments

protected int numFragments

DESCRIBE THE FIELD

numSurvivors

protected int numSurvivors

DESCRIBE THE FIELD

Constructor Detail

ErasureCodec

public ErasureCodec(int _numFragments,
                    int _numSurvivors,
                    Environment env)

Constructor for ErasureCodec.

Parameters:

_numFragments - DESCRIBE THE PARAMETER

_numSurvivors - DESCRIBE THE PARAMETER

env - DESCRIBE THE PARAMETER

Method Detail

dump

public void dump(byte[] data,
                 Logger logger)

DESCRIBE THE METHOD

Parameters:

data - DESCRIBE THE PARAMETER

logger - DESCRIBE THE PARAMETER

encodeObject

public Fragment[] encodeObject(java.io.Serializable obj,
                               boolean[] generateFragment)

DESCRIBE THE METHOD

Parameters:

obj - DESCRIBE THE PARAMETER

generateFragment - DESCRIBE THE PARAMETER

Returns:

DESCRIBE THE RETURN VALUE

encodeChunk

protected void encodeChunk(int[] buffer)

Input: buffer of size ; first words contain message, rest is zeroes Output: buffer contains fragments

Parameters:

buffer - DESCRIBE THE PARAMETER

encode

public Fragment[] encode(byte[] bytes,
                         boolean[] generateFragment)

DESCRIBE THE METHOD

Parameters:

bytes - DESCRIBE THE PARAMETER

generateFragment - DESCRIBE THE PARAMETER

Returns:

DESCRIBE THE RETURN VALUE

decodeChunk

protected void decodeChunk(int[] buffer,
                           int nExtra,
                           int[] RowInd,
                           boolean[] haveFragment,
                           long[][] InvMat,
                           int[] ColInd)

DESCRIBE THE METHOD

Parameters:

buffer - DESCRIBE THE PARAMETER

nExtra - DESCRIBE THE PARAMETER

RowInd - DESCRIBE THE PARAMETER

haveFragment - DESCRIBE THE PARAMETER

InvMat - DESCRIBE THE PARAMETER

ColInd - DESCRIBE THE PARAMETER

decode

public java.io.Serializable decode(Fragment[] frag)

DESCRIBE THE METHOD

Parameters:

frag - DESCRIBE THE PARAMETER

Returns:

DESCRIBE THE RETURN VALUE

initElt

protected void initElt()

DESCRIBE THE METHOD

main

public static void main(java.lang.String[] args)

DESCRIBE THE METHOD

Parameters:

args - DESCRIBE THE PARAMETER