com.gigaspaces.query.aggregators

Class SumZeroAggregator

java.lang.Object

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

com.gigaspaces.query.aggregators.AbstractPathAggregator<MutableNumber>

com.gigaspaces.query.aggregators.SumZeroAggregator

All Implemented Interfaces:

SmartExternalizable, Externalizable, Serializable, Cloneable

public class SumZeroAggregator
extends AbstractPathAggregator<MutableNumber>

Sums values of paths of matching entries, when no non null values are applied zero is returned instead of null returns the same type as the path.

Since:

16.0.1

Author:

Sagiv Michael

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SumZeroAggregator()
SumZeroAggregator(Class<?> type)

Method Summary

Modifier and Type	Method and Description
void	aggregate(SpaceEntriesAggregatorContext context)
void	aggregateIntermediateResult(MutableNumber partitionResult)
String	getDefaultAlias()
Object	getFinalResult()
MutableNumber	getIntermediateResult()
String	getName()
void	readExternal(ObjectInput in)
void	writeExternal(ObjectOutput out)

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

getFunctionCallColumn, getPath, getPathValue, setFunctionCallColumn, setPath

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

Methods inherited from interface com.gigaspaces.serialization.SmartExternalizable

enabledSmartExternalizableWithReference

Constructor Detail

SumZeroAggregator

public SumZeroAggregator()

SumZeroAggregator

public SumZeroAggregator(Class<?> type)

Method Detail

getDefaultAlias

public String getDefaultAlias()

Specified by:

getDefaultAlias in class SpaceEntriesAggregator<MutableNumber>

aggregate

public void aggregate(SpaceEntriesAggregatorContext context)

Specified by:

aggregate in class SpaceEntriesAggregator<MutableNumber>

getIntermediateResult

public MutableNumber getIntermediateResult()

Specified by:

getIntermediateResult in class SpaceEntriesAggregator<MutableNumber>

aggregateIntermediateResult

public void aggregateIntermediateResult(MutableNumber partitionResult)

Specified by:

aggregateIntermediateResult in class SpaceEntriesAggregator<MutableNumber>

getFinalResult

public Object getFinalResult()

Overrides:

getFinalResult in class SpaceEntriesAggregator<MutableNumber>

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class AbstractPathAggregator<MutableNumber>

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class AbstractPathAggregator<MutableNumber>

Throws:

IOException

ClassNotFoundException

getName

public String getName()

Specified by:

getName in class AbstractPathAggregator<MutableNumber>