com.tangosol.util.aggregator
Class GroupAggregator.Parallel

java.lang.Object
  com.tangosol.util.Base
      com.tangosol.util.BitHelper
          com.tangosol.util.ExternalizableHelper
              com.tangosol.util.aggregator.GroupAggregator
                  com.tangosol.util.aggregator.GroupAggregator.Parallel

All Implemented Interfaces:

ExternalizableLite, PortableObject, InvocableMap.EntryAggregator, InvocableMap.ParallelAwareAggregator, Serializable

Enclosing class:

GroupAggregator

public static class GroupAggregator.Parallel
extends GroupAggregator
implements InvocableMap.ParallelAwareAggregator

Parallel implementation of the GroupAggregator.

Nested Class Summary

Nested classes/interfaces inherited from class com.tangosol.util.aggregator.GroupAggregator

GroupAggregator.Parallel

Field Summary

Fields inherited from class com.tangosol.util.aggregator.GroupAggregator

m_aggregator, m_extractor, m_filter

Constructor Summary

	GroupAggregator.Parallel() Default constructor (necessary for the ExternalizableLite interface).
protected	GroupAggregator.Parallel(ValueExtractor extractor, InvocableMap.ParallelAwareAggregator aggregator, Filter filter) Construct a Parallel aggregator based on a specified ValueExtractor and underlying ParallelAwareAggregator.

Method Summary

Object	aggregateResults(Collection collResults) Aggregate the results of the parallel aggregations.
InvocableMap.EntryAggregator	getParallelAggregator() Get an aggregator that can take the place of this aggregator in situations in which the InvocableMap can aggregate in parallel.

Methods inherited from class com.tangosol.util.aggregator.GroupAggregator

aggregate, createInstance, createInstance, createInstance, createInstance, equals, getAggregator, getExtractor, hashCode, readExternal, readExternal, toString, writeExternal, writeExternal

Methods inherited from class com.tangosol.util.BitHelper

countBits, countBits, countBits, indexOfLSB, indexOfLSB, indexOfLSB, indexOfMSB, indexOfMSB, indexOfMSB, toBitString, toBitString, toBitString

Methods inherited from interface com.tangosol.util.InvocableMap.EntryAggregator

aggregate

Constructor Detail

GroupAggregator.Parallel

public GroupAggregator.Parallel()

Default constructor (necessary for the ExternalizableLite interface).

GroupAggregator.Parallel

protected GroupAggregator.Parallel(ValueExtractor extractor,
                                   InvocableMap.ParallelAwareAggregator aggregator,
                                   Filter filter)

Construct a Parallel aggregator based on a specified ValueExtractor and underlying ParallelAwareAggregator.

Parameters:

extractor - a ValueExtractor object; may not be null

aggregator - an EntryAggregator object; may not be null

Method Detail

getParallelAggregator

public InvocableMap.EntryAggregator getParallelAggregator()

Get an aggregator that can take the place of this aggregator in situations in which the InvocableMap can aggregate in parallel.

Specified by:

getParallelAggregator in interface InvocableMap.ParallelAwareAggregator

Returns:

the aggregator that will be run in parallel

aggregateResults

public Object aggregateResults(Collection collResults)

Aggregate the results of the parallel aggregations.

Specified by:

aggregateResults in interface InvocableMap.ParallelAwareAggregator

Returns:

the aggregation of the parallel aggregation results