org.apache.lucene.search.join
Classes 
FixedBitSetCachingWrapperFilter
JoinUtil
ToChildBlockJoinQuery
ToParentBlockJoinCollector
ToParentBlockJoinFieldComparator
ToParentBlockJoinFieldComparator.Highest
ToParentBlockJoinFieldComparator.Lowest
ToParentBlockJoinQuery
ToParentBlockJoinSortField
Enums 
ScoreMode