## Uses of Class
org.apache.lucene.index.SegmentReadState

- Packages that use SegmentReadState
  Package | Description
  --- | ---
  org.apache.lucene.codecs | Codecs API: API for customization of the encoding and structure of the index.
  org.apache.lucene.codecs.lucene90 | Lucene 9.0 file format.
  org.apache.lucene.codecs.lucene90.blocktree | BlockTree terms dictionary.
  org.apache.lucene.codecs.lucene99 | Lucene 9.9 file format.
  org.apache.lucene.codecs.perfield | Postings format that can delegate to different formats per-field.
  org.apache.lucene.index | Code to maintain and access indices.

- - ### Uses of SegmentReadState in org.apache.lucene.codecs

    Methods in org.apache.lucene.codecs with parameters of type SegmentReadState
    Modifier and Type | Method | Description
    --- | --- | ---
    `abstract DocValuesProducer` | DocValuesFormat.`fieldsProducer​(SegmentReadState state)` | Returns a `DocValuesProducer` to read docvalues from the index.
    `abstract FieldsProducer` | PostingsFormat.`fieldsProducer​(SegmentReadState state)` | Reads a segment.
    `abstract FlatVectorsReader` | FlatVectorsFormat.`fieldsReader​(SegmentReadState state)` | Returns a `KnnVectorsReader` to read the vectors from the index.
    `abstract KnnVectorsReader` | KnnVectorsFormat.`fieldsReader​(SegmentReadState state)` | Returns a `KnnVectorsReader` to read the vectors from the index.
    `abstract PointsReader` | PointsFormat.`fieldsReader​(SegmentReadState state)` | Reads a segment.
    `abstract void` | PostingsReaderBase.`init​(IndexInput termsIn, SegmentReadState state)` | Performs any initialization, such as reading and verifying the header from the provided terms dictionary `IndexInput`.
    `abstract NormsProducer` | NormsFormat.`normsProducer​(SegmentReadState state)` | Returns a `NormsProducer` to read norms from the index.

  - ### Uses of SegmentReadState in org.apache.lucene.codecs.lucene90

    Methods in org.apache.lucene.codecs.lucene90 with parameters of type SegmentReadState
    Modifier and Type | Method | Description
    --- | --- | ---
    `DocValuesProducer` | Lucene90DocValuesFormat.`fieldsProducer​(SegmentReadState state)` |
    `PointsReader` | Lucene90PointsFormat.`fieldsReader​(SegmentReadState state)` |
    `NormsProducer` | Lucene90NormsFormat.`normsProducer​(SegmentReadState state)` |

    Constructors in org.apache.lucene.codecs.lucene90 with parameters of type SegmentReadState
    Constructor | Description
    --- | ---
    `Lucene90PointsReader​(SegmentReadState readState)` | Sole constructor

  - ### Uses of SegmentReadState in org.apache.lucene.codecs.lucene90.blocktree

    Constructors in org.apache.lucene.codecs.lucene90.blocktree with parameters of type SegmentReadState
    Constructor | Description
    --- | ---
    `Lucene90BlockTreeTermsReader​(PostingsReaderBase postingsReader, SegmentReadState state)` | Sole constructor.

  - ### Uses of SegmentReadState in org.apache.lucene.codecs.lucene99

    Methods in org.apache.lucene.codecs.lucene99 with parameters of type SegmentReadState
    Modifier and Type | Method | Description
    --- | --- | ---
    `FieldsProducer` | Lucene99PostingsFormat.`fieldsProducer​(SegmentReadState state)` |
    `FlatVectorsReader` | Lucene99FlatVectorsFormat.`fieldsReader​(SegmentReadState state)` |
    `KnnVectorsReader` | Lucene99HnswScalarQuantizedVectorsFormat.`fieldsReader​(SegmentReadState state)` |
    `KnnVectorsReader` | Lucene99HnswVectorsFormat.`fieldsReader​(SegmentReadState state)` |
    `FlatVectorsReader` | Lucene99ScalarQuantizedVectorsFormat.`fieldsReader​(SegmentReadState state)` |
    `void` | Lucene99PostingsReader.`init​(IndexInput termsIn, SegmentReadState state)` |

    Constructors in org.apache.lucene.codecs.lucene99 with parameters of type SegmentReadState
    Constructor | Description
    --- | ---
    `Lucene99FlatVectorsReader​(SegmentReadState state)` |
    `Lucene99HnswVectorsReader​(SegmentReadState state, FlatVectorsReader flatVectorsReader)` |
    `Lucene99PostingsReader​(SegmentReadState state)` | Sole constructor.
    `Lucene99ScalarQuantizedVectorsReader​(SegmentReadState state, FlatVectorsReader rawVectorsReader)` |

  - ### Uses of SegmentReadState in org.apache.lucene.codecs.perfield

    Methods in org.apache.lucene.codecs.perfield with parameters of type SegmentReadState
    Modifier and Type | Method | Description
    --- | --- | ---
    `DocValuesProducer` | PerFieldDocValuesFormat.`fieldsProducer​(SegmentReadState state)` |
    `FieldsProducer` | PerFieldPostingsFormat.`fieldsProducer​(SegmentReadState state)` |
    `KnnVectorsReader` | PerFieldKnnVectorsFormat.`fieldsReader​(SegmentReadState state)` |

    Constructors in org.apache.lucene.codecs.perfield with parameters of type SegmentReadState
    Constructor | Description
    --- | ---
    `FieldsReader​(SegmentReadState readState)` | Create a FieldsReader over a segment, opening VectorReaders for each KnnVectorsFormat specified by the indexed numeric vector fields.

  - ### Uses of SegmentReadState in org.apache.lucene.index

    Constructors in org.apache.lucene.index with parameters of type SegmentReadState
    Constructor | Description
    --- | ---
    `SegmentReadState​(SegmentReadState other, String newSegmentSuffix)` | Create a `SegmentReadState`.