Module org.apache.lucene.core

Package org.apache.lucene.codecs.lucene90

Class DeflateWithPresetDictCompressionMode

java.lang.Object

org.apache.lucene.codecs.compressing.CompressionMode

org.apache.lucene.codecs.lucene90.DeflateWithPresetDictCompressionMode

public final class DeflateWithPresetDictCompressionMode
extends CompressionMode

A compression mode that trades speed for compression ratio. Although compression and decompression might be slow, this compression mode should provide a good compression ratio. This mode might be interesting if/when your index size is much bigger than your OS cache.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	DeflateWithPresetDictCompressionMode.DeflateWithPresetDictCompressor
private static final class	DeflateWithPresetDictCompressionMode.DeflateWithPresetDictDecompressor

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	DICT_SIZE_FACTOR
private static final int	NUM_SUB_BLOCKS

Fields inherited from class org.apache.lucene.codecs.compressing.CompressionMode

FAST, FAST_DECOMPRESSION, HIGH_COMPRESSION

Constructor Summary

Constructors

Constructor	Description
DeflateWithPresetDictCompressionMode()	Sole constructor.

Method Summary

Modifier and Type	Method	Description
Compressor	newCompressor()	Create a new Compressor instance.
Decompressor	newDecompressor()	Create a new Decompressor instance.
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

NUM_SUB_BLOCKS

private static final int NUM_SUB_BLOCKS

See Also:

• Constant Field Values

DICT_SIZE_FACTOR

private static final int DICT_SIZE_FACTOR

See Also:

• Constant Field Values

Constructor Details

DeflateWithPresetDictCompressionMode

public DeflateWithPresetDictCompressionMode()

Sole constructor.

Method Details

newCompressor

public Compressor newCompressor()

Description copied from class: CompressionMode

Create a new Compressor instance.

Specified by:

newCompressor in class CompressionMode

newDecompressor

public Decompressor newDecompressor()

Description copied from class: CompressionMode

Create a new Decompressor instance.

Specified by:

newDecompressor in class CompressionMode

toString

public String toString()

Overrides:

toString in class Object