org.apache.lucene.facet

Class FacetsCollectorManager

java.lang.Object

org.apache.lucene.facet.FacetsCollectorManager

All Implemented Interfaces:

CollectorManager<FacetsCollector,FacetsCollector>

public class FacetsCollectorManager
extends java.lang.Object
implements CollectorManager<FacetsCollector,FacetsCollector>

A CollectorManager implementation which produces FacetsCollector and produces a merged FacetsCollector. This is used for concurrent FacetsCollection.

Constructor Summary

Constructors

Constructor and Description
FacetsCollectorManager() Sole constructor.

Method Summary

Modifier and Type	Method and Description
FacetsCollector	newCollector() Return a new Collector.
FacetsCollector	reduce(java.util.Collection<FacetsCollector> collectors) Reduce the results of individual collectors into a meaningful result.

Methods inherited from class java.lang.Object

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

Constructor Detail

FacetsCollectorManager

public FacetsCollectorManager()

Sole constructor.

Method Detail

newCollector

public FacetsCollector newCollector()
                             throws java.io.IOException

Description copied from interface: CollectorManager

Return a new Collector. This must return a different instance on each call.

Specified by:

newCollector in interface CollectorManager<FacetsCollector,FacetsCollector>

Throws:

java.io.IOException

reduce

public FacetsCollector reduce(java.util.Collection<FacetsCollector> collectors)
                       throws java.io.IOException

Description copied from interface: CollectorManager

Reduce the results of individual collectors into a meaningful result. For instance a TopDocsCollector would compute the top docs of each collector and then merge them using TopDocs.merge(int, TopDocs[]). This method must be called after collection is finished on all provided collectors.

Specified by:

reduce in interface CollectorManager<FacetsCollector,FacetsCollector>

Throws:

java.io.IOException