com.espertech.esper.epl.agg.service
Class AggregationServiceBaseUngrouped

java.lang.Object
  com.espertech.esper.epl.agg.service.AggregationServiceBaseUngrouped

All Implemented Interfaces:

AggregationResultFuture, AggregationService

Direct Known Subclasses:

AggSvcGroupAllMixedAccessImpl, AggSvcGroupAllNoAccessImpl

public abstract class AggregationServiceBaseUngrouped
extends java.lang.Object
implements AggregationService

All aggregation services require evaluation nodes which supply the value to be aggregated (summed, averaged, etc.) and aggregation state factories to make new aggregation states.

Field Summary

protected AggregationStateFactory[]	accessAggregations
protected AggregationMethodFactory[]	aggregatorFactories
protected AggregationMethod[]	aggregators Aggregation states.
protected ExprEvaluator[]	evaluators Evaluation nodes under.

Constructor Summary

AggregationServiceBaseUngrouped(ExprEvaluator[] evaluators, AggregationMethod[] aggregators, AggregationMethodFactory[] aggregatorFactories, AggregationStateFactory[] accessAggregations)
Ctor.

Method Summary

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.service.AggregationService

accept, acceptGroupDetail, applyEnter, applyLeave, clearResults, isGrouped, setCurrentAccess, setRemovedCallback

Methods inherited from interface com.espertech.esper.epl.agg.service.AggregationResultFuture

getCollectionOfEvents, getCollectionScalar, getEventBean, getGroupKey, getGroupKeys, getValue

Field Detail

evaluators

protected ExprEvaluator[] evaluators

Evaluation nodes under.

aggregators

protected AggregationMethod[] aggregators

Aggregation states.

aggregatorFactories

protected AggregationMethodFactory[] aggregatorFactories

accessAggregations

protected AggregationStateFactory[] accessAggregations

Constructor Detail

AggregationServiceBaseUngrouped

public AggregationServiceBaseUngrouped(ExprEvaluator[] evaluators,
                                       AggregationMethod[] aggregators,
                                       AggregationMethodFactory[] aggregatorFactories,
                                       AggregationStateFactory[] accessAggregations)

Ctor.

Parameters:

evaluators - - are the child node of each aggregation function used for computing the value to be aggregated

aggregators - - aggregation states/factories