com.gigaspaces.query.aggregators

Class DistinctAggregator<T>

java.lang.Object

com.gigaspaces.query.aggregators.SpaceEntriesAggregator<DistinctResult>

com.gigaspaces.query.aggregators.DistinctAggregator<T>

All Implemented Interfaces:

Externalizable, Serializable, Cloneable

public class DistinctAggregator<T>
extends SpaceEntriesAggregator<DistinctResult>
implements Externalizable

Aggregator for fetching distinct entries - based on some fields.

Since:

10.1

Author:

anna

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DistinctAggregator()

Method Summary

Modifier and Type	Method and Description
void	aggregate(SpaceEntriesAggregatorContext context)
void	aggregateIntermediateResult(DistinctResult partitionResult)
DistinctAggregator	distinct(Integer limit, String... paths)
DistinctAggregator	distinct(String... paths)
String	getDefaultAlias()
Collection<T>	getFinalResult()
DistinctResult	getIntermediateResult()
void	readExternal(ObjectInput in)
void	writeExternal(ObjectOutput out)

Methods inherited from class com.gigaspaces.query.aggregators.SpaceEntriesAggregator

as, clone, getAlias, setRawEntryConverter, toObject

Methods inherited from class java.lang.Object

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

Constructor Detail

DistinctAggregator

public DistinctAggregator()

Method Detail

distinct

public DistinctAggregator distinct(String... paths)

distinct

public DistinctAggregator distinct(Integer limit,
                                   String... paths)

getDefaultAlias

public String getDefaultAlias()

Specified by:

getDefaultAlias in class SpaceEntriesAggregator<DistinctResult>

aggregate

public void aggregate(SpaceEntriesAggregatorContext context)

Specified by:

aggregate in class SpaceEntriesAggregator<DistinctResult>

aggregateIntermediateResult

public void aggregateIntermediateResult(DistinctResult partitionResult)

Specified by:

aggregateIntermediateResult in class SpaceEntriesAggregator<DistinctResult>

getIntermediateResult

public DistinctResult getIntermediateResult()

Specified by:

getIntermediateResult in class SpaceEntriesAggregator<DistinctResult>

getFinalResult

public Collection<T> getFinalResult()

Overrides:

getFinalResult in class SpaceEntriesAggregator<DistinctResult>

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException