Module org.apache.lucene.grouping

Package org.apache.lucene.search.grouping

Class DistinctValuesCollector.DistinctValuesReducer<T,R>

java.lang.Object

org.apache.lucene.search.grouping.GroupReducer<T,DistinctValuesCollector.ValuesCollector<R>>

org.apache.lucene.search.grouping.DistinctValuesCollector.DistinctValuesReducer<T,R>

Enclosing class:

DistinctValuesCollector<T,R>

private static class DistinctValuesCollector.DistinctValuesReducer<T,R>
extends GroupReducer<T,DistinctValuesCollector.ValuesCollector<R>>

Field Summary

Fields

Modifier and Type	Field	Description
(package private) final GroupSelector<R>	valueSelector

Constructor Summary

Constructors

Modifier	Constructor	Description
private	DistinctValuesReducer(GroupSelector<R> valueSelector)

Method Summary

Modifier and Type	Method	Description
boolean	needsScores()	Whether or not this reducer requires collected documents to be scored
protected DistinctValuesCollector.ValuesCollector<R>	newCollector()	Creates a new Collector for each group

Methods inherited from class org.apache.lucene.search.grouping.GroupReducer

collect, getCollector, setGroups, setNextReader, setScorer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

valueSelector

final GroupSelector<R> valueSelector

Constructor Details

DistinctValuesReducer

private DistinctValuesReducer(GroupSelector<R> valueSelector)

Method Details

needsScores

public boolean needsScores()

Description copied from class: GroupReducer

Whether or not this reducer requires collected documents to be scored

Specified by:

needsScores in class GroupReducer<T,DistinctValuesCollector.ValuesCollector<R>>

newCollector

protected DistinctValuesCollector.ValuesCollector<R> newCollector()

Description copied from class: GroupReducer

Creates a new Collector for each group

Specified by:

newCollector in class GroupReducer<T,DistinctValuesCollector.ValuesCollector<R>>