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 Description

class MultiCollectorManager.Collectors

Field Summary

Fields
Modifier and Type Field Description

private CollectorManager<Collector,?>[] collectorManagers

Constructor Summary

Constructors
Constructor Description

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	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

- Field Detail
  - collectorManagers
```
private final CollectorManager<Collector,?>[] collectorManagers
```
- 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