| 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. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
AbstractAllGroupHeadsCollector<GH extends AbstractAllGroupHeadsCollector.GroupHead>
This collector specializes in collecting the most relevant document (group head) for each group that match the query. 
 | 
class  | 
TermAllGroupHeadsCollector<GH extends AbstractAllGroupHeadsCollector.GroupHead>
A base implementation of  
AbstractAllGroupHeadsCollector for retrieving the most relevant groups when grouping
 on a string based group field. | 
| Modifier and Type | Field and Description | 
|---|---|
GH | 
AbstractAllGroupHeadsCollector.TemporalResult.groupHead  |