org.apache.lucene.search

Class MultiCollectorManager

java.lang.Object

org.apache.lucene.search.MultiCollectorManager

All Implemented Interfaces:

CollectorManager<MultiCollectorManager.Collectors,java.lang.Object[]>

public class MultiCollectorManager
extends java.lang.Object
implements CollectorManager<MultiCollectorManager.Collectors,java.lang.Object[]>

A CollectorManager implements which wrap a set of CollectorManager as MultiCollector acts for Collector.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	MultiCollectorManager.Collectors

Constructor Summary

Constructors

Constructor and Description
MultiCollectorManager(CollectorManager<? extends Collector,?>... collectorManagers)

Method Summary

Modifier and Type	Method and Description
MultiCollectorManager.Collectors	newCollector() Return a new Collector.
java.lang.Object[]	reduce(java.util.Collection<MultiCollectorManager.Collectors> reducableCollectors) 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

MultiCollectorManager

@SafeVarargs
public MultiCollectorManager(CollectorManager<? extends Collector,?>... collectorManagers)

Method Detail

newCollector

public MultiCollectorManager.Collectors 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<MultiCollectorManager.Collectors,java.lang.Object[]>

Throws:

java.io.IOException

reduce

public java.lang.Object[] reduce(java.util.Collection<MultiCollectorManager.Collectors> reducableCollectors)
                          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<MultiCollectorManager.Collectors,java.lang.Object[]>

Throws:

java.io.IOException