Class TopGroupsCollector<T>
- java.lang.Object
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- org.apache.lucene.search.SimpleCollector
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- org.apache.lucene.search.grouping.SecondPassGroupingCollector<T>
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- org.apache.lucene.search.grouping.TopGroupsCollector<T>
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- Type Parameters:
T- the type of the group value
- All Implemented Interfaces:
Collector,LeafCollector
public class TopGroupsCollector<T> extends SecondPassGroupingCollector<T>
A second-pass collector that collects the TopDocs for each group, and returns them as aTopGroupsobject
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Field Summary
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Fields inherited from class org.apache.lucene.search.grouping.SecondPassGroupingCollector
groupReducer, groups, groupSelector, totalGroupedHitCount, totalHitCount
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Constructor Summary
Constructors Constructor Description TopGroupsCollector(GroupSelector<T> groupSelector, Collection<SearchGroup<T>> groups, Sort groupSort, Sort withinGroupSort, int maxDocsPerGroup, boolean getMaxScores)Create a new TopGroupsCollector
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description TopGroups<T>getTopGroups(int withinGroupOffset)Get the TopGroups recorded by this collector-
Methods inherited from class org.apache.lucene.search.grouping.SecondPassGroupingCollector
collect, doSetNextReader, getGroupSelector, scoreMode, setScorer
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Methods inherited from class org.apache.lucene.search.SimpleCollector
getLeafCollector
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.lucene.search.LeafCollector
collect, competitiveIterator, finish
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Constructor Detail
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TopGroupsCollector
public TopGroupsCollector(GroupSelector<T> groupSelector, Collection<SearchGroup<T>> groups, Sort groupSort, Sort withinGroupSort, int maxDocsPerGroup, boolean getMaxScores)
Create a new TopGroupsCollector- Parameters:
groupSelector- the group selector used to define groupsgroups- the groups to collect TopDocs forgroupSort- the order in which groups are returnedwithinGroupSort- the order in which documents are sorted in each groupmaxDocsPerGroup- the maximum number of docs to collect for each groupgetMaxScores- if true, record the maximum score for each group
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