org.apache.lucene.search.grouping

Class TermSecondPassGroupingCollector

java.lang.Object

org.apache.lucene.search.Collector

org.apache.lucene.search.grouping.AbstractSecondPassGroupingCollector<java.lang.String>

org.apache.lucene.search.grouping.TermSecondPassGroupingCollector

public class TermSecondPassGroupingCollector
extends AbstractSecondPassGroupingCollector<java.lang.String>

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

WARNING: This API is experimental and might change in incompatible ways in the next release.

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(java.lang.String groupField, java.util.Collection<SearchGroup<java.lang.String>> groups, org.apache.lucene.search.Sort groupSort, org.apache.lucene.search.Sort withinGroupSort, int maxDocsPerGroup, boolean getScores, boolean getMaxScores, boolean fillSortFields)

Method Summary

Modifier and Type	Method and Description
protected AbstractSecondPassGroupingCollector.SearchGroupDocs<java.lang.String>	retrieveGroup(int doc) Returns the group the specified doc belongs to or null if no group could be retrieved.
void	setNextReader(org.apache.lucene.index.IndexReader reader, int docBase)

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(java.lang.String groupField,
                                       java.util.Collection<SearchGroup<java.lang.String>> groups,
                                       org.apache.lucene.search.Sort groupSort,
                                       org.apache.lucene.search.Sort withinGroupSort,
                                       int maxDocsPerGroup,
                                       boolean getScores,
                                       boolean getMaxScores,
                                       boolean fillSortFields)
                                throws java.io.IOException

Throws:

java.io.IOException

Method Detail

setNextReader

public void setNextReader(org.apache.lucene.index.IndexReader reader,
                          int docBase)
                   throws java.io.IOException

Overrides:

setNextReader in class AbstractSecondPassGroupingCollector<java.lang.String>

Throws:

java.io.IOException

retrieveGroup

protected AbstractSecondPassGroupingCollector.SearchGroupDocs<java.lang.String> retrieveGroup(int doc)
                                                                                       throws java.io.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<java.lang.String>

Parameters:

doc - The specified doc

Returns:

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

Throws:

java.io.IOException - If an I/O related error occurred