com.espertech.esper.epl.agg.access

Class AggregationStateSortedImpl

java.lang.Object

com.espertech.esper.epl.agg.access.AggregationStateSortedImpl

All Implemented Interfaces:

AggregationState, AggregationStateSorted, AggregationStateWithSize

Direct Known Subclasses:

AggregationStateSortedJoin, AggregationStateSortedWFilter

public class AggregationStateSortedImpl
extends Object
implements AggregationStateWithSize, AggregationStateSorted

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

Field Summary

Fields

Modifier and Type	Field and Description
protected int	size
protected TreeMap<Object,Object>	sorted
protected AggregationStateSortedSpec	spec

Constructor Summary

Constructors

Constructor and Description
AggregationStateSortedImpl(AggregationStateSortedSpec spec) Ctor.

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.
protected boolean	dereferenceEvent(EventBean theEvent)
protected void	dereferenceRemove(EventBean theEvent, EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext)
static Object	getComparable(ExprEvaluator[] criteria, EventBean[] eventsPerStream, boolean istream, ExprEvaluatorContext exprEvaluatorContext)
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.
protected void	referenceAdd(EventBean theEvent, EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext)
protected boolean	referenceEvent(EventBean theEvent)
int	size() Must return the number of events currently held, if applicable.

Methods inherited from class java.lang.Object

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

Field Detail

spec

protected final AggregationStateSortedSpec spec

sorted

protected final TreeMap<Object,Object> sorted

size

protected int size

Constructor Detail

AggregationStateSortedImpl

public AggregationStateSortedImpl(AggregationStateSortedSpec spec)

Ctor.

Parameters:

spec - aggregation 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

referenceEvent

protected boolean referenceEvent(EventBean theEvent)

dereferenceEvent

protected boolean dereferenceEvent(EventBean theEvent)

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: AggregationStateWithSize

Must return the number of events currently held, if applicable. Return -1 if not applicable.

Specified by:

size in interface AggregationStateSorted

Specified by:

size in interface AggregationStateWithSize

Returns:

number of events

getComparable

public static Object getComparable(ExprEvaluator[] criteria,
                                   EventBean[] eventsPerStream,
                                   boolean istream,
                                   ExprEvaluatorContext exprEvaluatorContext)

referenceAdd

protected void referenceAdd(EventBean theEvent,
                            EventBean[] eventsPerStream,
                            ExprEvaluatorContext exprEvaluatorContext)

dereferenceRemove

protected void dereferenceRemove(EventBean theEvent,
                                 EventBean[] eventsPerStream,
                                 ExprEvaluatorContext exprEvaluatorContext)