AggregationStateWithSize.java

/*
 ***************************************************************************************
 *  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.access;

public interface AggregationStateWithSize extends AggregationState {
    /**
     * Must return the number of events currently held, if applicable.
     * Return -1 if not applicable.
     *
     * @return number of events
     */
    public int size();
}