Package org.apache.lucene.search.grouping

Class DistinctValuesCollector.ValuesCollector<R>

java.lang.Object

org.apache.lucene.search.SimpleCollector

org.apache.lucene.search.grouping.DistinctValuesCollector.ValuesCollector<R>

All Implemented Interfaces:

Collector, LeafCollector

Enclosing class:

DistinctValuesCollector<T,R>

private static class DistinctValuesCollector.ValuesCollector<R>
extends SimpleCollector

Field Summary

Fields

Modifier and Type	Field	Description
(package private) java.util.Set<R>	values
(package private) GroupSelector<R>	valueSelector

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ValuesCollector(GroupSelector<R> valueSelector)

Method Summary

Modifier and Type	Method	Description
void	collect(int doc)	Called once for every document matching a query, with the unbased document number.
protected void	doSetNextReader(LeafReaderContext context)	This method is called before collecting context.
ScoreMode	scoreMode()	Indicates what features are required from the scorer.

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

Methods inherited from interface org.apache.lucene.search.LeafCollector

competitiveIterator

Field Detail

valueSelector

final GroupSelector<R> valueSelector

values

final java.util.Set<R> values

Constructor Detail

ValuesCollector

private ValuesCollector(GroupSelector<R> valueSelector)

Method Detail

collect

public void collect(int doc)
             throws java.io.IOException

Description copied from interface: LeafCollector

Called once for every document matching a query, with the unbased document number.

Note: The collection of the current segment can be terminated by throwing a CollectionTerminatedException. In this case, the last docs of the current LeafReaderContext will be skipped and IndexSearcher will swallow the exception and continue collection with the next leaf.

Note: This is called in an inner search loop. For good search performance, implementations of this method should not call IndexSearcher.doc(int) or IndexReader.document(int) on every hit. Doing so can slow searches by an order of magnitude or more.

Specified by:

collect in interface LeafCollector

Specified by:

collect in class SimpleCollector

Throws:

java.io.IOException

doSetNextReader

protected void doSetNextReader(LeafReaderContext context)
                        throws java.io.IOException

Description copied from class: SimpleCollector

This method is called before collecting context.

Overrides:

doSetNextReader in class SimpleCollector

Throws:

java.io.IOException

scoreMode

public ScoreMode scoreMode()

Description copied from interface: Collector

Indicates what features are required from the scorer.