com.esotericsoftware.kryo.compress
Class Delta

java.lang.Object
  com.esotericsoftware.kryo.compress.Delta

public class Delta
extends java.lang.Object

Determines the delta to convert one ByteBuffer to another. The delta is a list of copy and append commands. Most of this code was originally from the "javaxdelta" project. It was heavily customized for efficiency when used with Kryo.

Constructor Summary

Delta()
Creates a Delta with a buffer size of 2048 and chunk size of 8.

Delta(int bufferSize, int chunkSize)

Method Summary

void	compress(java.nio.ByteBuffer sourceBuffer, java.nio.ByteBuffer targetBuffer, java.nio.ByteBuffer outputBuffer)
void	decompress(java.nio.ByteBuffer oldData, java.nio.ByteBuffer deltaData, java.nio.ByteBuffer outputBuffer)

Methods inherited from class java.lang.Object

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

Constructor Detail

Delta

public Delta()

Creates a Delta with a buffer size of 2048 and chunk size of 8.

Delta

public Delta(int bufferSize,
             int chunkSize)

Parameters:

bufferSize - The maximum size a serialized object may be before or after compression.

chunkSize - A larger chunk size is faster and uses less memory, but creates larger deltas. The chunk size does not affect decompress(ByteBuffer, ByteBuffer, ByteBuffer).

Method Detail

compress

public void compress(java.nio.ByteBuffer sourceBuffer,
                     java.nio.ByteBuffer targetBuffer,
                     java.nio.ByteBuffer outputBuffer)

decompress

public void decompress(java.nio.ByteBuffer oldData,
                       java.nio.ByteBuffer deltaData,
                       java.nio.ByteBuffer outputBuffer)

Parameters:

oldData - Can be null if the delta does not contain copy commands.