/*
***************************************************************************************
* 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.agg.rollup;
import com.espertech.esper.epl.expression.core.ExprNode;
import java.util.Collections;
import java.util.List;
public class GroupByRollupNodeSingleExpr extends GroupByRollupNodeBase {
private final ExprNode expression;
public GroupByRollupNodeSingleExpr(ExprNode expression) {
this.expression = expression;
}
public List<int[]> evaluate(GroupByRollupEvalContext context) {
int index = context.getIndex(expression);
return Collections.singletonList(new int[]{index});
}
}