org.apache.lucene.search.grouping.dv

Class DVDistinctValuesCollector<GC extends AbstractDistinctValuesCollector.GroupCount<?>>

java.lang.Object

org.apache.lucene.search.Collector

org.apache.lucene.search.grouping.AbstractDistinctValuesCollector<GC>

org.apache.lucene.search.grouping.dv.DVDistinctValuesCollector<GC>

public abstract class DVDistinctValuesCollector<GC extends AbstractDistinctValuesCollector.GroupCount<?>>
extends AbstractDistinctValuesCollector<GC>

Docvalues implementation of AbstractDistinctValuesCollector.

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.AbstractDistinctValuesCollector

AbstractDistinctValuesCollector.GroupCount<GROUP_VALUE_TYPE>

Method Summary

Methods

Modifier and Type	Method and Description
static <T> DVDistinctValuesCollector<AbstractDistinctValuesCollector.GroupCount<T>>	create(String groupField, String countField, Collection<SearchGroup<T>> groups, boolean diskResident, DocValues.Type type) Constructs a docvalues based implementation of AbstractDistinctValuesCollector based on the specified type.

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

acceptsDocsOutOfOrder, getGroups, setScorer

Methods inherited from class org.apache.lucene.search.Collector

collect, setNextReader

Methods inherited from class java.lang.Object

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

Method Detail

create

public static <T> DVDistinctValuesCollector<AbstractDistinctValuesCollector.GroupCount<T>> create(String groupField,
                                                                                  String countField,
                                                                                  Collection<SearchGroup<T>> groups,
                                                                                  boolean diskResident,
                                                                                  DocValues.Type type)

Constructs a docvalues based implementation of AbstractDistinctValuesCollector based on the specified type.

Parameters:

groupField - The field to group by

countField - The field to count distinct values for

groups - The top N groups, collected during the first phase search

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

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

Returns:

a docvalues based distinct count collector