/*
***************************************************************************************
* 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.expression.dot;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventPropertyGetterIndexed;
import com.espertech.esper.epl.expression.core.ExprEvaluator;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ExprDotEvalPropertyExprIndexed extends ExprDotEvalPropertyExprBase {
private static final Logger log = LoggerFactory.getLogger(ExprDotEvalPropertyExprIndexed.class);
private final EventPropertyGetterIndexed indexedGetter;
public ExprDotEvalPropertyExprIndexed(String statementName, String propertyName, int streamNum, ExprEvaluator exprEvaluator, Class propertyType, EventPropertyGetterIndexed indexedGetter) {
super(statementName, propertyName, streamNum, exprEvaluator, propertyType);
this.indexedGetter = indexedGetter;
}
public Object evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
EventBean eventInQuestion = eventsPerStream[super.streamNum];
if (eventInQuestion == null) {
return null;
}
Object index = exprEvaluator.evaluate(eventsPerStream, isNewData, context);
if (index == null || (!(index instanceof Integer))) {
log.warn(super.getWarningText("integer", index));
return null;
}
return indexedGetter.get(eventInQuestion, (Integer) index);
}
}