/**************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package com.espertech.esper.epl.agg.service;
import com.espertech.esper.core.context.util.AgentInstanceContext;
import com.espertech.esper.epl.agg.access.AggregationAccessorSlotPair;
import com.espertech.esper.epl.core.MethodResolutionService;
import com.espertech.esper.epl.expression.ExprEvaluator;
/**
* Implementation for handling aggregation with grouping by group-keys.
*/
public class AggSvcGroupByRefcountedWAccessFactory extends AggregationServiceFactoryBase
{
protected final AggregationAccessorSlotPair[] accessors;
protected final int[] streams;
protected final boolean isJoin;
/**
* Ctor.
* @param evaluators - evaluate the sub-expression within the aggregate function (ie. sum(4*myNum))
* @param prototypes - collect the aggregation state that evaluators evaluate to, act as prototypes for new aggregations
* aggregation states for each group
* @param accessors accessor definitions
* @param streams streams in join
* @param isJoin true for join, false for single-stream
*/
public AggSvcGroupByRefcountedWAccessFactory(ExprEvaluator evaluators[],
AggregationMethodFactory prototypes[],
AggregationAccessorSlotPair[] accessors,
int[] streams,
boolean isJoin)
{
super(evaluators, prototypes);
this.accessors = accessors;
this.streams = streams;
this.isJoin = isJoin;
}
public AggregationService makeService(AgentInstanceContext agentInstanceContext, MethodResolutionService methodResolutionService) {
return new AggSvcGroupByRefcountedWAccessImpl(evaluators, aggregators, methodResolutionService, accessors, streams, isJoin);
}
}