/*
***************************************************************************************
* 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.enummethod.eval;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.core.ExprEvaluator;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
import com.espertech.esper.event.arr.ObjectArrayEventBean;
import com.espertech.esper.event.arr.ObjectArrayEventType;
import java.util.Collection;
public class EnumEvalAggregateScalar extends EnumEvalAggregateBase implements EnumEval {
private final ObjectArrayEventType evalEventType;
public EnumEvalAggregateScalar(ExprEvaluator initialization, ExprEvaluator innerExpression, int streamNumLambda, ObjectArrayEventType resultEventType, ObjectArrayEventType evalEventType) {
super(initialization, innerExpression, streamNumLambda, resultEventType);
this.evalEventType = evalEventType;
}
public Object evaluateEnumMethod(EventBean[] eventsLambda, Collection target, boolean isNewData, ExprEvaluatorContext context) {
Object initializationValue = initialization.evaluate(eventsLambda, isNewData, context);
if (target.isEmpty()) {
return initializationValue;
}
ObjectArrayEventBean resultEvent = new ObjectArrayEventBean(new Object[1], resultEventType);
ObjectArrayEventBean evalEvent = new ObjectArrayEventBean(new Object[1], evalEventType);
for (Object next : target) {
resultEvent.getProperties()[0] = initializationValue;
evalEvent.getProperties()[0] = next;
eventsLambda[streamNumLambda] = resultEvent;
eventsLambda[streamNumLambda + 1] = evalEvent;
initializationValue = innerExpression.evaluate(eventsLambda, isNewData, context);
}
return initializationValue;
}
}