com.espertech.esper.epl.agg.access

Class AggregationStateMinMaxByEver

java.lang.Object

com.espertech.esper.epl.agg.access.AggregationStateMinMaxByEver

All Implemented Interfaces:

AggregationState, AggregationStateSorted

public class AggregationStateMinMaxByEver
extends Object
implements AggregationState, AggregationStateSorted

Implementation of access function for single-stream (not joins).

Field Summary

Fields

Modifier and Type	Field and Description
protected Object	currentMinMax
protected EventBean	currentMinMaxBean
protected AggregationStateMinMaxByEverSpec	spec

Constructor Summary

Constructors

Constructor and Description
AggregationStateMinMaxByEver(AggregationStateMinMaxByEverSpec spec)

Method Summary

Modifier and Type	Method and Description
void	applyEnter(EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext) Enter an event.
void	applyLeave(EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext) Remove an event.
void	clear() Clear all events in the group.
Collection<EventBean>	collectionReadOnly() Returns all events for the group.
EventBean	getFirstValue() Returns the first (oldest) value entered.
EventBean	getLastValue() Returns the newest (last) value entered.
Iterator<EventBean>	getReverseIterator()
Iterator<EventBean>	iterator() Returns all events for the group.
int	size() Returns the number of events in the group.

Methods inherited from class java.lang.Object

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

Field Detail

spec

protected final AggregationStateMinMaxByEverSpec spec

currentMinMaxBean

protected EventBean currentMinMaxBean

currentMinMax

protected Object currentMinMax

Constructor Detail

AggregationStateMinMaxByEver

public AggregationStateMinMaxByEver(AggregationStateMinMaxByEverSpec spec)

Method Detail

clear

public void clear()

Description copied from interface: AggregationState

Clear all events in the group.

Specified by:

clear in interface AggregationState

applyEnter

public void applyEnter(EventBean[] eventsPerStream,
                       ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationState

Enter an event.

Specified by:

applyEnter in interface AggregationState

Parameters:

eventsPerStream - all events in all streams, typically implementations pick the relevant stream's events to add

exprEvaluatorContext - expression eval context

applyLeave

public void applyLeave(EventBean[] eventsPerStream,
                       ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationState

Remove an event.

Specified by:

applyLeave in interface AggregationState

Parameters:

eventsPerStream - all events in all streams, typically implementations pick the relevant stream's events to remove

exprEvaluatorContext - expression eval context

getFirstValue

public EventBean getFirstValue()

Description copied from interface: AggregationStateSorted

Returns the first (oldest) value entered.

Specified by:

getFirstValue in interface AggregationStateSorted

Returns:

first value

getLastValue

public EventBean getLastValue()

Description copied from interface: AggregationStateSorted

Returns the newest (last) value entered.

Specified by:

getLastValue in interface AggregationStateSorted

Returns:

last value

iterator

public Iterator<EventBean> iterator()

Description copied from interface: AggregationStateSorted

Returns all events for the group.

Specified by:

iterator in interface AggregationStateSorted

Returns:

group event iterator

getReverseIterator

public Iterator<EventBean> getReverseIterator()

Specified by:

getReverseIterator in interface AggregationStateSorted

collectionReadOnly

public Collection<EventBean> collectionReadOnly()

Description copied from interface: AggregationStateSorted

Returns all events for the group.

Specified by:

collectionReadOnly in interface AggregationStateSorted

Returns:

group event iterator

size

public int size()

Description copied from interface: AggregationStateSorted

Returns the number of events in the group.

Specified by:

size in interface AggregationStateSorted

Returns:

size