org.apache.lucene.search.grouping.dv

Class DVSecondPassGroupingCollector<GROUP_VALUE>

java.lang.Object

org.apache.lucene.search.Collector

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

org.apache.lucene.search.grouping.dv.DVSecondPassGroupingCollector<GROUP_VALUE>

public abstract class DVSecondPassGroupingCollector<GROUP_VALUE>
extends AbstractSecondPassGroupingCollector<GROUP_VALUE>

IDV based implementation of AbstractSecondPassGroupingCollector.

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

Method Summary

Methods

Modifier and Type	Method and Description
static <T> DVSecondPassGroupingCollector<T>	create(String groupField, boolean diskResident, DocValues.Type type, Collection<SearchGroup<T>> searchGroups, Sort groupSort, Sort withinGroupSort, int maxDocsPerGroup, boolean getScores, boolean getMaxScores, boolean fillSortFields) Constructs a DVSecondPassGroupingCollector.
protected DocValues.Source	getDefaultSource(AtomicReaderContext readerContext)
protected abstract void	setDocValuesSources(DocValues.Source source, AtomicReaderContext readerContext) Sets the idv source for concrete implementations to use.
void	setNextReader(AtomicReaderContext readerContext)

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

acceptsDocsOutOfOrder, collect, getTopGroups, retrieveGroup, setScorer

Methods inherited from class java.lang.Object

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

Method Detail

create

public static <T> DVSecondPassGroupingCollector<T> create(String groupField,
                                          boolean diskResident,
                                          DocValues.Type type,
                                          Collection<SearchGroup<T>> searchGroups,
                                          Sort groupSort,
                                          Sort withinGroupSort,
                                          int maxDocsPerGroup,
                                          boolean getScores,
                                          boolean getMaxScores,
                                          boolean fillSortFields)
                                               throws IOException

Constructs a DVSecondPassGroupingCollector. Selects and constructs the most optimal second pass collector implementation for grouping by DocValues.

Parameters:

groupField - The field to group by

diskResident - Whether the values to group by should be disk resident

type - The DocValues.Type which is used to select a concrete implementation.

searchGroups - The groups from the first phase search

groupSort - The sort used for the groups

withinGroupSort - The sort used for documents inside a group

maxDocsPerGroup - The maximum number of documents to collect per group

getScores - Whether to include scores for the documents inside a group

getMaxScores - Whether to keep track of the higest score per group

fillSortFields - Whether to include the sort values

Returns:

the most optimal second pass collector implementation for grouping by DocValues

Throws:

IOException - If I/O related errors occur

setNextReader

public void setNextReader(AtomicReaderContext readerContext)
                   throws IOException

Overrides:

setNextReader in class AbstractSecondPassGroupingCollector<GROUP_VALUE>

Throws:

IOException

setDocValuesSources

protected abstract void setDocValuesSources(DocValues.Source source,
                       AtomicReaderContext readerContext)

Sets the idv source for concrete implementations to use.

Parameters:

source - The idv source to be used by concrete implementations

readerContext - The current reader context

getDefaultSource

protected DocValues.Source getDefaultSource(AtomicReaderContext readerContext)

Parameters:

readerContext - The current reader context

Returns:

The default source when no doc values are available.