org.apache.lucene.search.grouping.function

Class FunctionDistinctValuesCollector

java.lang.Object

org.apache.lucene.search.Collector

org.apache.lucene.search.grouping.AbstractDistinctValuesCollector<FunctionDistinctValuesCollector.GroupCount>

org.apache.lucene.search.grouping.function.FunctionDistinctValuesCollector

public class FunctionDistinctValuesCollector
extends AbstractDistinctValuesCollector<FunctionDistinctValuesCollector.GroupCount>

Function based implementation of AbstractDistinctValuesCollector.

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

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FunctionDistinctValuesCollector.GroupCount Holds distinct values for a single group.

Constructor Summary

Constructors

Constructor and Description
FunctionDistinctValuesCollector(Map<?,?> vsContext, ValueSource groupSource, ValueSource countSource, Collection<SearchGroup<MutableValue>> groups)

Method Summary

Methods

Modifier and Type	Method and Description
void	collect(int doc)
List<FunctionDistinctValuesCollector.GroupCount>	getGroups() Returns all unique values for each top N group.
void	setNextReader(AtomicReaderContext context)

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

acceptsDocsOutOfOrder, setScorer

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionDistinctValuesCollector

public FunctionDistinctValuesCollector(Map<?,?> vsContext,
                               ValueSource groupSource,
                               ValueSource countSource,
                               Collection<SearchGroup<MutableValue>> groups)

Method Detail

getGroups

public List<FunctionDistinctValuesCollector.GroupCount> getGroups()

Description copied from class: AbstractDistinctValuesCollector

Returns all unique values for each top N group.

Specified by:

getGroups in class AbstractDistinctValuesCollector<FunctionDistinctValuesCollector.GroupCount>

Returns:

all unique values for each top N group

collect

public void collect(int doc)
             throws IOException

Specified by:

collect in class Collector

Throws:

IOException

setNextReader

public void setNextReader(AtomicReaderContext context)
                   throws IOException

Specified by:

setNextReader in class Collector

Throws:

IOException