org.apache.lucene.search.grouping

Class TopGroupsCollector.TopDocsReducer<T>

java.lang.Object

org.apache.lucene.search.grouping.GroupReducer<T,TopGroupsCollector.TopDocsAndMaxScoreCollector>

org.apache.lucene.search.grouping.TopGroupsCollector.TopDocsReducer<T>

Enclosing class:

TopGroupsCollector<T>

private static class TopGroupsCollector.TopDocsReducer<T>
extends GroupReducer<T,TopGroupsCollector.TopDocsAndMaxScoreCollector>

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	needsScores
private java.util.function.Supplier<TopGroupsCollector.TopDocsAndMaxScoreCollector>	supplier

Constructor Summary

Constructors

Constructor and Description
TopDocsReducer(Sort withinGroupSort, int maxDocsPerGroup, boolean getMaxScores)

Method Summary

Modifier and Type	Method and Description
boolean	needsScores() Whether or not this reducer requires collected documents to be scored
protected TopGroupsCollector.TopDocsAndMaxScoreCollector	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 Detail

supplier

private final java.util.function.Supplier<TopGroupsCollector.TopDocsAndMaxScoreCollector> supplier

needsScores

private final boolean needsScores

Constructor Detail

TopDocsReducer

TopDocsReducer(Sort withinGroupSort,
               int maxDocsPerGroup,
               boolean getMaxScores)

Method Detail

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,TopGroupsCollector.TopDocsAndMaxScoreCollector>

newCollector

protected TopGroupsCollector.TopDocsAndMaxScoreCollector newCollector()

Description copied from class: GroupReducer

Creates a new Collector for each group

Specified by:

newCollector in class GroupReducer<T,TopGroupsCollector.TopDocsAndMaxScoreCollector>