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

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

All Implemented Interfaces:

AggregationServiceFactory

Direct Known Subclasses:

AggSvcGroupAllMixedAccessFactory, AggSvcGroupAllNoAccessFactory, AggSvcGroupByMixedAccessFactory, AggSvcGroupByNoAccessFactory, AggSvcGroupByReclaimAgedFactory, AggSvcGroupByRefcountedNoAccessFactory, AggSvcGroupByRefcountedWAccessFactory, AggSvcGroupByRefcountedWAccessRollupFactory

public abstract class AggregationServiceFactoryBase
extends java.lang.Object
implements AggregationServiceFactory

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 AggregationMethodFactory[]	aggregators Prototype aggregation states and factories.
protected ExprEvaluator[]	evaluators Evaluation nodes under.
protected java.lang.Object	groupKeyBinding

Constructor Summary

AggregationServiceFactoryBase(ExprEvaluator[] evaluators, AggregationMethodFactory[] aggregators, java.lang.Object groupKeyBinding)
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.AggregationServiceFactory

makeService

Field Detail

evaluators

protected ExprEvaluator[] evaluators

Evaluation nodes under.

aggregators

protected AggregationMethodFactory[] aggregators

Prototype aggregation states and factories.

groupKeyBinding

protected java.lang.Object groupKeyBinding

Constructor Detail

AggregationServiceFactoryBase

public AggregationServiceFactoryBase(ExprEvaluator[] evaluators,
                                     AggregationMethodFactory[] aggregators,
                                     java.lang.Object groupKeyBinding)

Ctor.

Parameters:

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

aggregators - - aggregation states/factories