/*
***************************************************************************************
* 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.ExprEvaluatorContext;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
public class EnumEvalReverse implements EnumEval {
private int numStreams;
public EnumEvalReverse(int numStreams) {
this.numStreams = numStreams;
}
public int getStreamNumSize() {
return numStreams;
}
public Object evaluateEnumMethod(EventBean[] eventsLambda, Collection target, boolean isNewData, ExprEvaluatorContext context) {
if (target.isEmpty()) {
return target;
}
ArrayList<Object> result = new ArrayList<Object>(target.size());
result.addAll(target);
Collections.reverse(result);
return result;
}
}