com.espertech.esper.epl.approx

Class CountMinSketchAggAccessorTopk

java.lang.Object

com.espertech.esper.epl.approx.CountMinSketchAggAccessorTopk

All Implemented Interfaces:

AggregationAccessor, AggregationAccessorForge

public class CountMinSketchAggAccessorTopk
extends java.lang.Object
implements AggregationAccessor, AggregationAccessorForge

Field Summary

Fields

Modifier and Type	Field and Description
static CountMinSketchAggAccessorTopk	INSTANCE

Method Summary

Modifier and Type	Method and Description
AggregationAccessor	getAccessor(EngineImportService engineImportService, boolean isFireAndForget, java.lang.String statementName)
EventBean	getEnumerableEvent(AggregationState state, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext) Return the aggregation state value consisting of a single event.
java.util.Collection<EventBean>	getEnumerableEvents(AggregationState state, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext) Return the aggregation state value consisting of a collection of events.
java.util.Collection<java.lang.Object>	getEnumerableScalar(AggregationState state, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext) Return the aggregation state value consisting of a collection of scalar values.
java.lang.Object	getValue(AggregationState aggregationState, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext) Return the aggregation state value either as a scalar value or any other object.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.epl.agg.access.AggregationAccessorForge

getEnumerableEventCodegen, getEnumerableEventsCodegen, getEnumerableScalarCodegen, getPluginCodegenType, getValueCodegen

Field Detail

INSTANCE

public static final CountMinSketchAggAccessorTopk INSTANCE

Method Detail

getAccessor

public AggregationAccessor getAccessor(EngineImportService engineImportService,
                                       boolean isFireAndForget,
                                       java.lang.String statementName)

Specified by:

getAccessor in interface AggregationAccessorForge

getValue

public java.lang.Object getValue(AggregationState aggregationState,
                                 EventBean[] eventsPerStream,
                                 boolean isNewData,
                                 ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationAccessor

Return the aggregation state value either as a scalar value or any other object.

For enumeration over scalar values or objects return an array or collection of scalar or object values.

Use the #getEnumerableEvents method to return a collection of events.

Use the #getEnumerableEvent to return a single events.

Specified by:

getValue in interface AggregationAccessor

Parameters:

aggregationState - aggregation state, downcast as needed

eventsPerStream - events

isNewData - new-data indicator

exprEvaluatorContext - eval context

Returns:

return value

getEnumerableEvents

public java.util.Collection<EventBean> getEnumerableEvents(AggregationState state,
                                                           EventBean[] eventsPerStream,
                                                           boolean isNewData,
                                                           ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationAccessor

Return the aggregation state value consisting of a collection of events.

Specified by:

getEnumerableEvents in interface AggregationAccessor

Parameters:

state - aggregation state, downcast as needed

eventsPerStream - events

isNewData - new-data indicator

exprEvaluatorContext - eval context

Returns:

return collection of events or null or empty collection

getEnumerableEvent

public EventBean getEnumerableEvent(AggregationState state,
                                    EventBean[] eventsPerStream,
                                    boolean isNewData,
                                    ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationAccessor

Return the aggregation state value consisting of a single event.

Specified by:

getEnumerableEvent in interface AggregationAccessor

Parameters:

state - aggregation state, downcast as needed

eventsPerStream - events

isNewData - new-data indicator

exprEvaluatorContext - eval context

Returns:

return event or null

getEnumerableScalar

public java.util.Collection<java.lang.Object> getEnumerableScalar(AggregationState state,
                                                                  EventBean[] eventsPerStream,
                                                                  boolean isNewData,
                                                                  ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationAccessor

Return the aggregation state value consisting of a collection of scalar values.

Specified by:

getEnumerableScalar in interface AggregationAccessor

Parameters:

state - aggregation state, downcast as needed

eventsPerStream - events

isNewData - new-data indicator

exprEvaluatorContext - eval context

Returns:

return collection of scalar or null or empty collection