com.espertech.esper.epl.agg.aggregator
Class AggregatorLastEver

java.lang.Object
  com.espertech.esper.epl.agg.aggregator.AggregatorLastEver

All Implemented Interfaces:

AggregationMethod

Direct Known Subclasses:

AggregatorLastEverFilter

public class AggregatorLastEver
extends java.lang.Object
implements AggregationMethod

Aggregator for the very last value.

Field Summary

protected java.lang.Object	lastValue
protected java.lang.Class	type

Constructor Summary

AggregatorLastEver(java.lang.Class type)
Ctor.

Method Summary

void	clear() Clear out the collection.
void	enter(java.lang.Object object) Apply the value as entering aggregation (entering window).
java.lang.Object	getValue() Returns the current value held.
java.lang.Class	getValueType() Returns the type of the current value.
void	leave(java.lang.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

type

protected final java.lang.Class type

lastValue

protected java.lang.Object lastValue

Constructor Detail

AggregatorLastEver

public AggregatorLastEver(java.lang.Class type)

Ctor.

Parameters:

type - of result

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(java.lang.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(java.lang.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 java.lang.Object getValue()

Description copied from interface: AggregationMethod

Returns the current value held.

Specified by:

getValue in interface AggregationMethod

Returns:

current value

getValueType

public java.lang.Class getValueType()

Description copied from interface: AggregationMethod

Returns the type of the current value.

Specified by:

getValueType in interface AggregationMethod

Returns:

type of values held