/*
* *************************************************************************************
* 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.enummethod.eval;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.ExprEvaluator;
import com.espertech.esper.epl.expression.ExprEvaluatorContext;
import com.espertech.esper.event.arr.ObjectArrayEventBean;
import com.espertech.esper.event.arr.ObjectArrayEventType;
import java.util.ArrayDeque;
import java.util.Collection;
public class EnumEvalWhereIndexEvents extends EnumEvalBaseIndex implements EnumEval {
public EnumEvalWhereIndexEvents(ExprEvaluator innerExpression, int streamNumLambda, ObjectArrayEventType indexEventType) {
super(innerExpression, streamNumLambda, indexEventType);
}
public Object evaluateEnumMethod(EventBean[] eventsLambda, Collection target, boolean isNewData, ExprEvaluatorContext context) {
if (target.isEmpty()) {
return target;
}
Collection<EventBean> beans = (Collection<EventBean>) target;
ArrayDeque<Object> result = new ArrayDeque<Object>();
ObjectArrayEventBean indexEvent = new ObjectArrayEventBean(new Object[1], indexEventType);
int count = -1;
for (EventBean next : beans) {
count++;
indexEvent.getProperties()[0] = count;
eventsLambda[streamNumLambda] = next;
eventsLambda[streamNumLambda + 1] = indexEvent;
Object pass = innerExpression.evaluate(eventsLambda, isNewData, context);
if (pass == null || (!(Boolean) pass)) {
continue;
}
result.add(next);
}
return result;
}
}