# Package org.apache.lucene.backward_codecs.lucene84

package org.apache.lucene.backward_codecs.lucene84
Lucene 8.4 file format.

- Related Packages
  Package
  Description
  org.apache.lucene.backward_codecs
  Common APIs for use by backwards compatibility codecs.
- Classes
  Class
  Description
  ForDeltaUtil
  Utility class to encode/decode increasing sequences of 128 integers.
  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.
  PForUtil
  Utility class to encode sequences of 128 small positive integers.