/**************************************************************************************
* 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.epl.expression;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.util.ExpressionReturnType;
import com.espertech.esper.metrics.instrumentation.InstrumentationHelper;
public class ExprDotEvalStreamEventBean implements ExprEvaluator
{
private final ExprDotNode exprDotNode;
private final int streamNumber;
private final ExprDotEval[] evaluators;
public ExprDotEvalStreamEventBean(ExprDotNode exprDotNode, int streamNumber, ExprDotEval[] evaluators) {
this.exprDotNode = exprDotNode;
this.streamNumber = streamNumber;
this.evaluators = evaluators;
}
public Class getType()
{
return evaluators[evaluators.length - 1].getTypeInfo().getSingleValueType();
}
public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext)
{
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().qExprStreamEventMethod(exprDotNode);}
EventBean theEvent = eventsPerStream[streamNumber];
if (theEvent == null) {
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aExprStreamEventMethod(null);}
return null;
}
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().qExprDotChain(ExpressionReturnType.singleEvent(theEvent.getEventType()), theEvent, evaluators);}
Object inner = ExprDotNodeUtility.evaluateChain(evaluators, theEvent, eventsPerStream, isNewData, exprEvaluatorContext);
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aExprDotChain();}
if (InstrumentationHelper.ENABLED) { InstrumentationHelper.get().aExprStreamEventMethod(inner);}
return inner;
}
}