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 3613 2007-02-15 14:45:14Z jstewart $

Author:

ahae

Field Summary

protected Environment	environment
protected Logger	logger
protected int	numFragments
protected int	numSurvivors

Constructor Summary

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

Method Summary

PastContent	decode(Fragment[] frag, Endpoint endpoint, PastContentDeserializer pcd)
protected void	decodeChunk(int[] buffer, int nExtra, int[] RowInd, boolean[] haveFragment, long[][] InvMat, int[] ColInd)
protected PastContent	deserialize(byte[] bytes, Endpoint endpoint, PastContentDeserializer pcd)
void	dump(byte[] data)
Fragment[]	encode(byte[] bytes, int length, boolean[] generateFragment) Generates multiple fragments from the incoming bytes
protected void	encodeChunk(int[] buffer) Input: buffer of size ; first words contain message, rest is zeroes Output: buffer contains fragments
Fragment[]	encodeObject(PastContent obj, boolean[] generateFragment)
Fragment[]	encodeObject(RawPastContent obj, boolean[] generateFragment) Serializes the object.
protected void	initElt()

Methods inherited from class java.lang.Object

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

Field Detail

numFragments

protected int numFragments

numSurvivors

protected int numSurvivors

environment

protected Environment environment

logger

protected Logger logger

Constructor Detail

ErasureCodec

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

Constructor for ErasureCodec.

Parameters:

_numFragments - DESCRIBE THE PARAMETER

_numSurvivors - DESCRIBE THE PARAMETER

Method Detail

dump

public void dump(byte[] data)

encodeObject

public Fragment[] encodeObject(PastContent obj,
                               boolean[] generateFragment)

encodeObject

public Fragment[] encodeObject(RawPastContent obj,
                               boolean[] generateFragment)

Serializes the object.

Parameters:

obj -

generateFragment -

Returns:

encodeChunk

protected void encodeChunk(int[] buffer)

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

encode

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

Generates multiple fragments from the incoming bytes

Parameters:

bytes -

length -

generateFragment -

Returns:

decodeChunk

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

decode

public PastContent decode(Fragment[] frag,
                          Endpoint endpoint,
                          PastContentDeserializer pcd)

deserialize

protected PastContent deserialize(byte[] bytes,
                                  Endpoint endpoint,
                                  PastContentDeserializer pcd)
                           throws java.io.IOException,
                                  java.lang.ClassNotFoundException

Throws:

java.io.IOException

java.lang.ClassNotFoundException

initElt

protected void initElt()