# Hierarchy For Package org.apache.lucene.backward_codecs.lucene90

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - org.apache.lucene.codecs.Codec (implements org.apache.lucene.util.NamedSPILoader.NamedSPI)
    - org.apache.lucene.backward_codecs.lucene90.Lucene90Codec
  - org.apache.lucene.codecs.FieldInfosFormat
    - org.apache.lucene.backward_codecs.lucene90.Lucene90FieldInfosFormat
  - org.apache.lucene.util.hnsw.HnswGraph
    - org.apache.lucene.backward_codecs.lucene90.Lucene90OnHeapHnswGraph
  - org.apache.lucene.codecs.KnnVectorsFormat (implements org.apache.lucene.util.NamedSPILoader.NamedSPI)
    - org.apache.lucene.backward_codecs.lucene90.Lucene90HnswVectorsFormat
  - org.apache.lucene.codecs.KnnVectorsReader (implements org.apache.lucene.util.Accountable, java.io.Closeable)
    - org.apache.lucene.backward_codecs.lucene90.Lucene90HnswVectorsReader
  - org.apache.lucene.backward_codecs.lucene90.Lucene90BoundsChecker
    - org.apache.lucene.backward_codecs.lucene90.Lucene90BoundsChecker.Max
    - org.apache.lucene.backward_codecs.lucene90.Lucene90BoundsChecker.Min
  - org.apache.lucene.backward_codecs.lucene90.Lucene90HnswGraphBuilder
  - org.apache.lucene.backward_codecs.lucene90.Lucene90NeighborArray
  - org.apache.lucene.codecs.PostingsFormat (implements org.apache.lucene.util.NamedSPILoader.NamedSPI)
    - org.apache.lucene.backward_codecs.lucene90.Lucene90PostingsFormat
  - org.apache.lucene.codecs.PostingsReaderBase (implements java.io.Closeable)
    - org.apache.lucene.backward_codecs.lucene90.Lucene90PostingsReader
  - org.apache.lucene.codecs.PostingsWriterBase (implements java.io.Closeable)
    - org.apache.lucene.codecs.PushPostingsWriterBase
      - org.apache.lucene.backward_codecs.lucene90.Lucene90PostingsWriter
  - org.apache.lucene.codecs.SegmentInfoFormat
    - org.apache.lucene.backward_codecs.lucene90.Lucene90SegmentInfoFormat
  - org.apache.lucene.index.TermState (implements java.lang.Cloneable)
    - org.apache.lucene.index.OrdTermState
      - org.apache.lucene.codecs.BlockTermState
        - org.apache.lucene.backward_codecs.lucene90.Lucene90PostingsFormat.IntBlockTermState

## Enum Hierarchy

- java.lang.Object
  - java.lang.Enum<E> (implements java.lang.Comparable<T>, java.io.Serializable)
    - org.apache.lucene.backward_codecs.lucene90.Lucene90Codec.Mode