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## 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 3507 2006-12-21 13:18:37Z jeffh $
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()

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