Class SecondPassGroupingCollector<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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- All Implemented Interfaces:
Collector,LeafCollector
- Direct Known Subclasses:
DistinctValuesCollector,TopGroupsCollector
public class SecondPassGroupingCollector<T> extends SimpleCollector
SecondPassGroupingCollector runs over an already collected set of groups, further applying aGroupReducerto each group- See Also:
TopGroupsCollector,DistinctValuesCollector- WARNING: This API is experimental and might change in incompatible ways in the next release.
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Field Summary
Fields Modifier and Type Field Description protected GroupReducer<T,?>groupReducerprotected Collection<SearchGroup<T>>groupsprotected GroupSelector<T>groupSelectorprotected inttotalGroupedHitCountprotected inttotalHitCount
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Constructor Summary
Constructors Constructor Description SecondPassGroupingCollector(GroupSelector<T> groupSelector, Collection<SearchGroup<T>> groups, GroupReducer<T,?> reducer)Create a new SecondPassGroupingCollector
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidcollect(int doc)protected voiddoSetNextReader(LeafReaderContext readerContext)GroupSelector<T>getGroupSelector()ScoreModescoreMode()voidsetScorer(Scorable scorer)-
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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Field Detail
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groupSelector
protected final GroupSelector<T> groupSelector
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groups
protected final Collection<SearchGroup<T>> groups
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groupReducer
protected final GroupReducer<T,?> groupReducer
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totalHitCount
protected int totalHitCount
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totalGroupedHitCount
protected int totalGroupedHitCount
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Constructor Detail
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SecondPassGroupingCollector
public SecondPassGroupingCollector(GroupSelector<T> groupSelector, Collection<SearchGroup<T>> groups, GroupReducer<T,?> reducer)
Create a new SecondPassGroupingCollector- Parameters:
groupSelector- the GroupSelector that defines groups for this searchgroups- the groups to collect documents forreducer- the reducer to apply to each group
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Method Detail
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getGroupSelector
public GroupSelector<T> getGroupSelector()
- Returns:
- the GroupSelector used in this collector
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scoreMode
public ScoreMode scoreMode()
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setScorer
public void setScorer(Scorable scorer) throws IOException
- Specified by:
setScorerin interfaceLeafCollector- Overrides:
setScorerin classSimpleCollector- Throws:
IOException
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collect
public void collect(int doc) throws IOException- Specified by:
collectin interfaceLeafCollector- Specified by:
collectin classSimpleCollector- Throws:
IOException
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doSetNextReader
protected void doSetNextReader(LeafReaderContext readerContext) throws IOException
- Overrides:
doSetNextReaderin classSimpleCollector- Throws:
IOException
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