org.apache.lucene.search.grouping.function

Class FunctionDistinctValuesCollector

java.lang.Object

org.apache.lucene.search.SimpleCollector

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

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

All Implemented Interfaces:

Collector, LeafCollector

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)
protected void	doSetNextReader(LeafReaderContext context)
List<FunctionDistinctValuesCollector.GroupCount>	getGroups() Returns all unique values for each top N group.
boolean	needsScores()

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

getLeafCollector, 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 interface LeafCollector

Specified by:

collect in class SimpleCollector

Throws:

IOException

doSetNextReader

protected void doSetNextReader(LeafReaderContext context)
                        throws IOException

Overrides:

doSetNextReader in class SimpleCollector

Throws:

IOException

needsScores

public boolean needsScores()