## Uses of Class
org.apache.lucene.codecs.KnnVectorsWriter

- Packages that use KnnVectorsWriter
  Package | Description
  --- | ---
  org.apache.lucene.codecs | Codecs API: API for customization of the encoding and structure of the index.
  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.

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

    Subclasses of KnnVectorsWriter in org.apache.lucene.codecs
    Modifier and Type | Class | Description
    --- | --- | ---
    `class` | `BufferingKnnVectorsWriter` | Buffers up pending vector value(s) per doc, then flushes when segment flushes.

    Methods in org.apache.lucene.codecs that return KnnVectorsWriter
    Modifier and Type | Method | Description
    --- | --- | ---
    `abstract KnnVectorsWriter` | KnnVectorsFormat.`fieldsWriter​(SegmentWriteState state)` | Returns a `KnnVectorsWriter` to write the vectors to the index.

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

    Subclasses of KnnVectorsWriter in org.apache.lucene.codecs.lucene99
    Modifier and Type | Class | Description
    --- | --- | ---
    `class` | `Lucene99HnswVectorsWriter` | Writes vector values and knn graphs to index segments.

    Methods in org.apache.lucene.codecs.lucene99 that return KnnVectorsWriter
    Modifier and Type | Method | Description
    --- | --- | ---
    `KnnVectorsWriter` | Lucene99HnswScalarQuantizedVectorsFormat.`fieldsWriter​(SegmentWriteState state)` |
    `KnnVectorsWriter` | Lucene99HnswVectorsFormat.`fieldsWriter​(SegmentWriteState state)` |

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

    Methods in org.apache.lucene.codecs.perfield that return KnnVectorsWriter
    Modifier and Type | Method | Description
    --- | --- | ---
    `KnnVectorsWriter` | PerFieldKnnVectorsFormat.`fieldsWriter​(SegmentWriteState state)` |