com.espertech.esper.epl.agg.aggregator

Class AggregatorCountNonNull

java.lang.Object

com.espertech.esper.epl.agg.aggregator.AggregatorCountNonNull

All Implemented Interfaces:

AggregationMethod

public class AggregatorCountNonNull
extends Object
implements AggregationMethod

Count all non-null values.

Field Summary

Fields

Modifier and Type	Field and Description
protected long	numDataPoints

Constructor Summary

Constructors

Constructor and Description
AggregatorCountNonNull()

Method Summary

Modifier and Type	Method and Description
void	clear() Clear out the collection.
void	enter(Object object) Apply the value as entering aggregation (entering window).
Object	getValue() Returns the current value held.
void	leave(Object object) Apply the value as leaving aggregation (leaving window).

Methods inherited from class java.lang.Object

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

Field Detail

numDataPoints

protected long numDataPoints

Constructor Detail

AggregatorCountNonNull

public AggregatorCountNonNull()

Method Detail

clear

public void clear()

Description copied from interface: AggregationMethod

Clear out the collection.

Specified by:

clear in interface AggregationMethod

enter

public void enter(Object object)

Description copied from interface: AggregationMethod

Apply the value as entering aggregation (entering window).

The value can be null since 'null' values may be counted as unique separate values.

Specified by:

enter in interface AggregationMethod

Parameters:

object - to add to aggregate

leave

public void leave(Object object)

Description copied from interface: AggregationMethod

Apply the value as leaving aggregation (leaving window).

The value can be null since 'null' values may be counted as unique separate values.

Specified by:

leave in interface AggregationMethod

Parameters:

object - to remove from aggregate

getValue

public Object getValue()

Description copied from interface: AggregationMethod

Returns the current value held.

Specified by:

getValue in interface AggregationMethod

Returns:

current value