com.espertech.esper.epl.agg.service.common.AggregationStateFactory Maven / Gradle / Ivy

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Complex event processing and event series analysis component

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/*
 ***************************************************************************************
 *  Copyright (C) 2006 EsperTech, Inc. All rights reserved.                            *
 *  http://www.espertech.com/esper                                                     *
 *  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.common;

import com.espertech.esper.epl.agg.access.AggregationServicePassThru;
import com.espertech.esper.epl.agg.access.AggregationState;
import com.espertech.esper.epl.expression.core.ExprNode;

public interface AggregationStateFactory {
    AggregationState createAccess(int agentInstanceId,
                                         boolean join,
                                         Object groupKey,
                                         AggregationServicePassThru passThru);

    ExprNode getAggregationExpression();
}