/*
***************************************************************************************
* 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.core.service;
import com.espertech.esper.client.EventBean;
import java.util.Collection;
/**
* On the level of expression declaration:
* a) for non-enum evaluation and for enum-evaluation a separate cache
* b) The cache is keyed by the prototype-node and verified by a events-per-stream (EventBean[]) that is maintained or rewritten.
* <p>
* NOTE: ExpressionResultCacheEntry should not be held onto since the instance returned can be reused.
*/
public interface ExpressionResultCacheForDeclaredExprLastColl {
ExpressionResultCacheEntry<EventBean[], Collection<EventBean>> getDeclaredExpressionLastColl(Object node, EventBean[] eventsPerStream);
void saveDeclaredExpressionLastColl(Object node, EventBean[] eventsPerStream, Collection<EventBean> result);
}