org.ranksys.compression.codecs.lemire

Class LemireCODEC

java.lang.Object

org.ranksys.compression.codecs.AbstractCODEC<int[]>

org.ranksys.compression.codecs.lemire.LemireCODEC

All Implemented Interfaces:

Serializable, CODEC<int[]>

Direct Known Subclasses:

FORVBCODEC, IntegratedFORVBCODEC, IntegratedVByteCODEC, NewPFDVBCODEC, OptPFDVBCODEC, Simple16CODEC, VByteCODEC

public class LemireCODEC
extends AbstractCODEC<int[]>

Wrapper for Lemire's JavaFastPFOR integer compression library. Check https://github.com/lemire/JavaFastPFOR

Author:

Saúl Vargas (Saul.Vargas@glasgow.ac.uk)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
LemireCODEC(Supplier<me.lemire.integercompression.IntegerCODEC> supplier) Constructor.

Method Summary

Modifier and Type	Method and Description
int[]	co(int[] in, int offset, int len) Compress.
int	dec(int[] in, int[] out, int outOffset, int len) Decompress.
boolean	isIntegrated() Returns if the CODEC is integrated, i.e.

Methods inherited from class org.ranksys.compression.codecs.AbstractCODEC

add, reset, stats

Methods inherited from class java.lang.Object

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

Constructor Detail

LemireCODEC

public LemireCODEC(Supplier<me.lemire.integercompression.IntegerCODEC> supplier)

Constructor.

Parameters:

supplier - supplier of an IntegerCODEC used internally

Method Detail

co

public int[] co(int[] in,
                int offset,
                int len)

Description copied from interface: CODEC

Compress.

Parameters:

in - array to be compressed.

offset - offset of in

len - number of integers to be compressed

Returns:

compressed representation of the array

dec

public int dec(int[] in,
               int[] out,
               int outOffset,
               int len)

Description copied from interface: CODEC

Decompress.

Parameters:

in - compressed representation of an array.

out - array where to write the compressed.

outOffset - offset of out

len - number of integers that need to be decompressed

Returns:

currently not used

isIntegrated

public boolean isIntegrated()

Description copied from interface: CODEC

Returns if the CODEC is integrated, i.e. requires that the input is a list of sorted integers (no use of d-gaps required).

Returns:

true is the CODEC is integrated, false otherwise