SubqueryStopCallback.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.subquery;

import com.espertech.esper.epl.join.table.EventTable;
import com.espertech.esper.util.StopCallback;

/**
 * Implements a stop callback for use with subqueries to clear their indexes
 * when a statement is stopped.
 */
public class SubqueryStopCallback implements StopCallback {
    private final EventTable[] eventIndex;

    /**
     * Ctor.
     *
     * @param eventIndex index to clear
     */
    public SubqueryStopCallback(EventTable[] eventIndex) {
        this.eventIndex = eventIndex;
    }

    // Clear out index on statement stop
    public void stop() {
        if (eventIndex != null) {
            for (EventTable table : eventIndex) {
                table.destroy();
            }
        }
    }
}