org.apache.lucene.search.grouping.term

Class TermSecondPassGroupingCollector

java.lang.Object

org.apache.lucene.search.Collector

org.apache.lucene.search.grouping.AbstractSecondPassGroupingCollector<BytesRef>

org.apache.lucene.search.grouping.term.TermSecondPassGroupingCollector

public class TermSecondPassGroupingCollector
extends AbstractSecondPassGroupingCollector<BytesRef>

Concrete implementation of AbstractSecondPassGroupingCollector that groups based on field values and more specifically uses SortedDocValues to collect grouped docs.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.search.grouping.AbstractSecondPassGroupingCollector

AbstractSecondPassGroupingCollector.SearchGroupDocs<GROUP_VALUE_TYPE>

Field Summary

Fields inherited from class org.apache.lucene.search.grouping.AbstractSecondPassGroupingCollector

groupDocs, groupMap

Constructor Summary

Constructors

Constructor and Description
TermSecondPassGroupingCollector(String groupField, Collection<SearchGroup<BytesRef>> groups, Sort groupSort, Sort withinGroupSort, int maxDocsPerGroup, boolean getScores, boolean getMaxScores, boolean fillSortFields)

Method Summary

Methods

Modifier and Type	Method and Description
protected AbstractSecondPassGroupingCollector.SearchGroupDocs<BytesRef>	retrieveGroup(int doc) Returns the group the specified doc belongs to or null if no group could be retrieved.
void	setNextReader(AtomicReaderContext readerContext) Called before collecting from each AtomicReaderContext.

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

acceptsDocsOutOfOrder, collect, getTopGroups, setScorer

Methods inherited from class java.lang.Object

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

Constructor Detail

TermSecondPassGroupingCollector

public TermSecondPassGroupingCollector(String groupField,
                               Collection<SearchGroup<BytesRef>> groups,
                               Sort groupSort,
                               Sort withinGroupSort,
                               int maxDocsPerGroup,
                               boolean getScores,
                               boolean getMaxScores,
                               boolean fillSortFields)
                                throws IOException

Throws:

IOException

Method Detail

setNextReader

public void setNextReader(AtomicReaderContext readerContext)
                   throws IOException

Description copied from class: Collector

Called before collecting from each AtomicReaderContext. All doc ids in Collector.collect(int) will correspond to IndexReaderContext.reader(). Add AtomicReaderContext.docBase to the current IndexReaderContext.reader()'s internal document id to re-base ids in Collector.collect(int).

Overrides:

setNextReader in class AbstractSecondPassGroupingCollector<BytesRef>

Parameters:

readerContext - next atomic reader context

Throws:

IOException

retrieveGroup

protected AbstractSecondPassGroupingCollector.SearchGroupDocs<BytesRef> retrieveGroup(int doc)
                                                                               throws IOException

Description copied from class: AbstractSecondPassGroupingCollector

Returns the group the specified doc belongs to or null if no group could be retrieved.

Specified by:

retrieveGroup in class AbstractSecondPassGroupingCollector<BytesRef>

Parameters:

doc - The specified doc

Returns:

the group the specified doc belongs to or null if no group could be retrieved

Throws:

IOException - If an I/O related error occurred