IndexWriter.addDocuments(java.util.Collection<org.apache.lucene.document.Document>) or IndexWriter.updateDocuments(org.apache.lucene.index.Term, java.util.Collection<org.apache.lucene.document.Document>) API.AbstractAllGroupHeadsCollector instance based on the supplied arguments.AbstractAllGroupHeadsCollector instance based on the supplied arguments.AbstractFirstPassGroupingCollector.null if no group could be retrieved.AbstractAllGroupHeadsCollector.temporalResult.FieldDoc instances if the
withinGroupSort sorted by fields.AbstractAllGroupHeadsCollector for retrieving the most relevant groups when grouping
on a string based group field.AbstractAllGroupsCollectorAbstractAllGroupsCollector.AbstractFirstPassGroupingCollector that groups based on
field values and more specifically uses FieldCache.StringIndex
to collect groups.AbstractSecondPassGroupingCollector that groups based on
field values and more specifically uses FieldCache.StringIndex
to collect grouped docs.