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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.grouping.request;
import java.util.Arrays;
import java.util.stream.Collectors;
/**
* This class represents a timestamp-formatter function in a {@link GroupingExpression}. It evaluates to a string on the
* form "YYYY-MM-DD" of the result of the argument.
*
* @author Simon Thoresen Hult
* @author bratseth
*/
public class DateFunction extends FunctionNode {
/**
* Constructs a new instance of this class.
*
* @param exp The expression to evaluate, must evaluate to a long.
*/
public DateFunction(GroupingExpression exp) {
this(null, null, exp);
}
private DateFunction(String label, Integer level, GroupingExpression exp) {
super("time.date", label, level, Arrays.asList(exp));
}
@Override
public DateFunction copy() {
return new DateFunction(getLabel(),
getLevelOrNull(),
getArg(0).copy());
}
}
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