/*
* *************************************************************************************
* 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.core.context.stmt;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.ExprEvaluator;
import com.espertech.esper.epl.expression.ExprEvaluatorContext;
import com.espertech.esper.epl.expression.ExprPriorEvalStrategy;
public class AIRegistryPriorSingle implements AIRegistryPrior, ExprPriorEvalStrategy {
private ExprPriorEvalStrategy strategy;
public AIRegistryPriorSingle() {
}
public void assignService(int num, ExprPriorEvalStrategy value) {
strategy = value;
}
public void deassignService(int num) {
strategy = null;
}
public int getAgentInstanceCount() {
return strategy == null ? 0 : 1;
}
public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext, int streamNumber, ExprEvaluator evaluator, int constantIndexNumber) {
return strategy.evaluate(eventsPerStream, isNewData, exprEvaluatorContext, streamNumber, evaluator, constantIndexNumber);
}
}