# All Classes and Interfaces

Class
Description
CompressionMode
A compression mode.
Compressor
A data compressor.
Decompressor
A decompressor.
DeflateWithPresetDictCompressionMode
A compression mode that trades speed for compression ratio.
EndiannessReverserUtil
Utility class to wrap open files
FieldReader
BlockTree's implementation of `Terms`.
ForDeltaUtil
Utility class to encode/decode increasing sequences of 128 integers.
ForDeltaUtil
Utility class to encode/decode increasing sequences of 128 integers.
LegacyDirectMonotonicReader
Retrieves an instance previously written by `LegacyDirectMonotonicWriter`.
LegacyDirectMonotonicReader.Meta
In-memory metadata that needs to be kept around for `LegacyDirectMonotonicReader` to read data from disk.
LegacyDirectMonotonicWriter
Write monotonically-increasing sequences of integers.
LegacyDirectReader
Retrieves an instance previously written by `LegacyDirectWriter`
LegacyDirectWriter
Class for writing packed integers to be directly read from Directory.
LegacyPackedInts
Legacy PackedInts operations.
Lucene40BlockTreeTermsReader
A block-based terms index and dictionary that assigns terms to variable length blocks according to how they share prefixes.
Lucene50CompoundFormat
Lucene 5.0 compound file format
Lucene50CompressingStoredFieldsFormat
A `StoredFieldsFormat` that compresses documents in chunks in order to improve the compression ratio.
Lucene50CompressingStoredFieldsReader
`StoredFieldsReader` impl for `Lucene50CompressingStoredFieldsFormat`.
Lucene50CompressingTermVectorsFormat
A `TermVectorsFormat` that compresses chunks of documents together in order to improve the compression ratio.
Lucene50CompressingTermVectorsReader
`TermVectorsReader` for `Lucene50CompressingTermVectorsFormat`.
Lucene50LiveDocsFormat
Lucene 5.0 live docs format
Lucene50PostingsFormat
Lucene 5.0 postings format, which encodes postings in packed integer blocks for fast decode.
Lucene50PostingsFormat.IntBlockTermState
Holds all state required for `Lucene50PostingsReader` to produce a `PostingsEnum` without re-seeking the terms dict.
Lucene50PostingsReader
Concrete class that reads docId(maybe frq,pos,offset,payloads) list with postings format.
Lucene50StoredFieldsFormat
Lucene 5.0 stored fields format.
Lucene50StoredFieldsFormat.Mode
Configuration option for stored fields.
Lucene50TermVectorsFormat
Lucene 5.0 `term vectors format`.
Lucene60FieldInfosFormat
Lucene 6.0 Field Infos format.
Lucene60PointsFormat
Lucene 6.0 point format, which encodes dimensional values in a block KD-tree structure for fast 1D range and N dimensional shape intersection filtering.
Lucene60PointsReader
Reads point values previously written with Lucene60PointsWriter
Lucene70SegmentInfoFormat
Lucene 7.0 Segment info format.
Lucene80Codec
Implements the Lucene 8.0 index format.
Lucene80DocValuesFormat
Lucene 8.0 DocValues format.
Lucene80DocValuesFormat.Mode
Configuration option for doc values.
Lucene80NormsFormat
Lucene 8.0 Score normalization format.
Lucene84Codec
Implements the Lucene 8.4 index format, with configurable per-field postings and docvalues formats.
Lucene84PostingsFormat
Lucene 5.0 postings format, which encodes postings in packed integer blocks for fast decode.
Lucene84PostingsFormat.IntBlockTermState
Holds all state required for `Lucene84PostingsReader` to produce a `PostingsEnum` without re-seeking the terms dict.
Lucene84PostingsReader
Concrete class that reads docId(maybe frq,pos,offset,payloads) list with postings format.
Lucene86Codec
Implements the Lucene 8.6 index format, with configurable per-field postings and docvalues formats.
Lucene86PointsFormat
Lucene 8.6 point format, which encodes dimensional values in a block KD-tree structure for fast 1D range and N dimensional shape intersection filtering.
Lucene86PointsReader
Reads point values previously written with Lucene86PointsWriter
Lucene86SegmentInfoFormat
Lucene 8.6 Segment info format.
Lucene87Codec
Implements the Lucene 8.6 index format, with configurable per-field postings and docvalues formats.
Lucene87Codec.Mode
Configuration option for the codec.
Lucene87StoredFieldsFormat
Lucene 8.7 stored fields format.
Lucene87StoredFieldsFormat.Mode
Configuration option for stored fields.
Lucene90BoundsChecker
A helper class for an hnsw graph that serves as a comparator of the currently set bound value with a new value.
Lucene90BoundsChecker.Max
A helper class for an hnsw graph that serves as a comparator of the currently set maximum value with a new value.
Lucene90BoundsChecker.Min
A helper class for an hnsw graph that serves as a comparator of the currently set minimum value with a new value.
Lucene90Codec
Implements the Lucene 9.0 index format
Lucene90Codec.Mode
Configuration option for the codec.
Lucene90FieldInfosFormat
Lucene 9.0 Field Infos format.
Lucene90HnswGraphBuilder
Builder for HNSW graph.
Lucene90HnswVectorsFormat
Lucene 9.0 vector format, which encodes numeric vector values and an optional associated graph connecting the documents having values.
Lucene90HnswVectorsReader
Reads vectors from the index segments along with index data structures supporting KNN search.
Lucene90NeighborArray
NeighborArray encodes the neighbors of a node and their mutual scores in the HNSW graph as a pair of growable arrays.
Lucene90OnHeapHnswGraph
An `HnswGraph` where all nodes and connections are held in memory.
Lucene90PostingsFormat
Lucene 9.0 postings format, which encodes postings in packed integer blocks for fast decode.
Lucene90PostingsFormat.IntBlockTermState
Holds all state required for `Lucene90PostingsReader` to produce a `PostingsEnum` without re-seeking the terms dict.
Lucene90PostingsReader
Concrete class that reads docId(maybe frq,pos,offset,payloads) list with postings format.
Lucene90PostingsWriter
Concrete class that writes docId(maybe frq,pos,offset,payloads) list with postings format.
Lucene90SegmentInfoFormat
Lucene 9.0 Segment info format.
Lucene912Codec
Implements the Lucene 9.12 index format
Lucene912Codec.Mode
Configuration option for the codec.
Lucene91BoundsChecker
A helper class for an hnsw graph that serves as a comparator of the currently set bound value with a new value.
Lucene91BoundsChecker.Max
A helper class for an hnsw graph that serves as a comparator of the currently set maximum value with a new value.
Lucene91BoundsChecker.Min
A helper class for an hnsw graph that serves as a comparator of the currently set minimum value with a new value.
Lucene91Codec
Implements the Lucene 9.1 index format
Lucene91Codec.Mode
Configuration option for the codec.
Lucene91HnswVectorsFormat
Lucene 9.1 vector format, which encodes numeric vector values and an optional associated graph connecting the documents having values.
Lucene91HnswVectorsReader
Reads vectors from the index segments along with index data structures supporting KNN search.
Lucene91NeighborArray
NeighborArray encodes the neighbors of a node and their mutual scores in the HNSW graph as a pair of growable arrays.
Lucene91OnHeapHnswGraph
An `HnswGraph` where all nodes and connections are held in memory.
Lucene92Codec
Implements the Lucene 9.2 index format
Lucene92Codec.Mode
Configuration option for the codec.
Lucene92HnswVectorsFormat
Lucene 9.2 vector format, which encodes numeric vector values and an optional associated graph connecting the documents having values.
Lucene92HnswVectorsReader
Reads vectors from the index segments along with index data structures supporting KNN search.
Lucene94Codec
Implements the Lucene 9.4 index format
Lucene94Codec.Mode
Configuration option for the codec.
Lucene94HnswVectorsFormat
Lucene 9.4 vector format, which encodes numeric vector values and an optional associated graph connecting the documents having values.
Lucene94HnswVectorsReader
Reads vectors from the index segments along with index data structures supporting KNN search.
Lucene95Codec
Implements the Lucene 9.5 index format
Lucene95Codec.Mode
Configuration option for the codec.
Lucene95HnswVectorsFormat
Lucene 9.5 vector format, which encodes numeric vector values and an optional associated graph connecting the documents having values.
Lucene95HnswVectorsReader
Reads vectors from the index segments along with index data structures supporting KNN search.
Lucene99Codec
Implements the Lucene 9.9 index format
Lucene99Codec.Mode
Configuration option for the codec.
Lucene99PostingsFormat
Lucene 9.9 postings format, which encodes postings in packed integer blocks for fast decode.
Lucene99PostingsFormat.IntBlockTermState
Holds all state required for `Lucene99PostingsReader` to produce a `PostingsEnum` without re-seeking the terms dict.
Lucene99PostingsReader
Concrete class that reads docId(maybe frq,pos,offset,payloads) list with postings format.
Lucene99SkipReader
Implements the skip list reader for block postings format that stores positions and payloads.
Lucene99SkipWriter
Write skip lists with multiple levels, and support skip within block ints.
LZ4WithPresetDictCompressionMode
A compression mode that compromises on the compression ratio to provide fast compression and decompression.
MatchingReaders
Computes which segments have identical field name to number mappings, which allows stored fields and term vectors in this codec to be bulk-merged.
PForUtil
Utility class to encode sequences of 128 small positive integers.
Placeholder
Remove this file when adding back compat codecs
Stats
BlockTree statistics for a single field returned by `FieldReader.getStats()`.