com.solacesystems.jcsmp.impl.compression

Class LookbackBuffer

java.lang.Object

com.solacesystems.jcsmp.impl.compression.LookbackBuffer

public class LookbackBuffer
extends Object

Provides a sliding window "lookback" capability. Used in compression to keep track of a data stream to be used with JZLIB. JZLIB requires that dictionaries start at byte 0 of the dictionary buffer, so getLookback() returns a byte[] where the lookback range starts at byte 0. For the kinds of writes we're doing, moving data on every write such as in our put() method will not present a performance penalty over other implementations.

Constructor Summary

Constructors

Constructor and Description
LookbackBuffer(int size)

Method Summary

Modifier and Type	Method and Description
int	available()
byte[]	getLookback()
void	put(byte[] data, int start, int length)

Methods inherited from class java.lang.Object

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

Constructor Detail

LookbackBuffer

public LookbackBuffer(int size)

Method Detail

getLookback

public byte[] getLookback()

available

public int available()

put

public void put(byte[] data,
                int start,
                int length)