Module org.apache.lucene.core

Package org.apache.lucene.util.compress

Class LZ4.HashTable

java.lang.Object

org.apache.lucene.util.compress.LZ4.HashTable

Direct Known Subclasses:

LZ4.FastCompressionHashTable, LZ4.HighCompressionHashTable

Enclosing class:

LZ4

abstract static class LZ4.HashTable
extends Object

A record of previous occurrences of sequences of 4 bytes.

Constructor Summary

Constructors

Constructor	Description
HashTable()

Method Summary

Modifier and Type	Method	Description
(package private) abstract boolean	assertReset()
(package private) abstract int	get(int off)	Advance the cursor to off and return an index that stored the same 4 bytes as b[o:o+4).
(package private) abstract void	initDictionary(int dictLen)	Init dictLen bytes to be used as a dictionary.
(package private) abstract int	previous(int off)	Return an index that less than off and stores the same 4 bytes.
(package private) abstract void	reset(byte[] b, int off, int len)	Reset this hash table in order to compress the given content.

Methods inherited from class java.lang.Object

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

Constructor Details

HashTable

HashTable()

Method Details

reset

abstract void reset(byte[] b,
 int off,
 int len)

Reset this hash table in order to compress the given content.

initDictionary

abstract void initDictionary(int dictLen)

Init dictLen bytes to be used as a dictionary.

get

abstract int get(int off)

Advance the cursor to off and return an index that stored the same 4 bytes as b[o:o+4). This may only be called on strictly increasing sequences of offsets. A return value of -1 indicates that no other index could be found.

previous

abstract int previous(int off)

Return an index that less than off and stores the same 4 bytes. Unlike get(int), it doesn't need to be called on increasing offsets. A return value of -1 indicates that no other index could be found.

assertReset

abstract boolean assertReset()