Lucene 4.8.0 grouping API

Packages

Package	Description
org.apache.lucene.search.grouping	This module enables search result grouping with Lucene, where hits with the same value in the specified single-valued group field are grouped together.
org.apache.lucene.search.grouping.function	Support for grouping by ValueSource.
org.apache.lucene.search.grouping.term	Support for grouping by indexed terms via FieldCache.