io.milton.zsync

Class Configuration

java.lang.Object

io.milton.zsync.Configuration

All Implemented Interfaces:

Serializable, Cloneable

public class Configuration
extends Object
implements Cloneable, Serializable

A Configuration is a mere collection of objects and values that compose a particular configuration for the algorithm, for example the message digest that computes the strong checksum.

Usage of a Configuration involves setting the member fields of this object to thier appropriate values; thus, it is up to the programmer to specify the strongSum, weakSum, blockLength and strongSumLength to be used. The other fields are optional.

Version:

$Revision: 1.9 $

Author:

Casey Marshall

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	BLOCK_LENGTH The default block size.
int	blockLength The length of blocks to checksum.
byte[]	checksumSeed The seed for the checksum, to perturb the strong checksum and help avoid collisions in plain rsync (or in similar applicaitons).
static int	CHUNK_SIZE The default chunk size.
int	chunkSize The maximum size of byte arrays to create, when they are needed.
boolean	doRunLength Whether or not to do run-length encoding when making Deltas.
MessageDigest	strongSum The message digest that computes the stronger checksum.
int	strongSumLength The effective length of the strong sum.
RollingChecksum	weakSum The rolling checksum.

Constructor Summary

Constructors

Constructor and Description
Configuration()

Method Summary

Modifier and Type	Method and Description
Object	clone()
int	getBlock()

Methods inherited from class java.lang.Object

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

Field Detail

BLOCK_LENGTH

public static final int BLOCK_LENGTH

The default block size.

See Also:

Constant Field Values

CHUNK_SIZE

public static final int CHUNK_SIZE

The default chunk size.

See Also:

Constant Field Values

strongSum

public transient MessageDigest strongSum

The message digest that computes the stronger checksum.

weakSum

public transient RollingChecksum weakSum

The rolling checksum.

blockLength

public int blockLength

The length of blocks to checksum.

strongSumLength

public int strongSumLength

The effective length of the strong sum.

doRunLength

public boolean doRunLength

Whether or not to do run-length encoding when making Deltas.

checksumSeed

public byte[] checksumSeed

The seed for the checksum, to perturb the strong checksum and help avoid collisions in plain rsync (or in similar applicaitons).

chunkSize

public int chunkSize

The maximum size of byte arrays to create, when they are needed. This vale defaults to 32 kilobytes.

Constructor Detail

Configuration

public Configuration()

Method Detail

getBlock

public int getBlock()

clone

public Object clone()

Overrides:

clone in class Object