Package org.apache.lucene.util.packed

Packed integer arrays and streams.

See:
Description

Interface Summary

PackedInts.Decoder	A decoder for packed integers.
PackedInts.Encoder	An encoder for packed integers.
PackedInts.Mutable	A packed integer array that can be modified.
PackedInts.Reader	A read-only random access array of positive integers.
PackedInts.ReaderIterator	Run-once iterator interface, to decode previously saved PackedInts.

Class Summary

GrowableWriter	Implements PackedInts.Mutable, but grows the bit count of the underlying packed ints on-demand.
PackedInts	Simplistic compression for array of unsigned long values.
PackedInts.FormatAndBits	Simple class that holds a format and a number of bits per value.
PackedInts.Writer	A write-once Writer.

Enum Summary

PackedInts.Format

A format to write packed ints.

Package org.apache.lucene.util.packed Description

Packed integer arrays and streams.

The packed package provides

• sequential and random access capable arrays of positive longs,
• routines for efficient serialization and deserialization of streams of packed integers.

The implementations provide different trade-offs between memory usage and access speed. The standard usage scenario is replacing large int or long arrays in order to reduce the memory footprint.

The main access point is the PackedInts factory.