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// Copyright Vespa.ai. 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.List;
/**
* This class represents an md5-function in a {@link GroupingExpression}. It evaluates to a long that equals the md5 of
* the result of the argument.
*
* @author Simon Thoresen Hult
*/
public class Md5Function extends FunctionNode {
/**
* Constructs a new instance of this class.
*
* @param exp The expression to evaluate.
* @param numBits The number of bits of the md5 to include.
*/
public Md5Function(GroupingExpression exp, int numBits) {
this(null, null, exp, new LongValue(numBits));
}
private Md5Function(String label, Integer level, GroupingExpression exp, LongValue numBits) {
super("md5", label, level, List.of(exp, numBits));
}
@Override
public Md5Function copy() {
return new Md5Function(getLabel(), getLevelOrNull(), getArg(0).copy(), (LongValue)getArg(1).copy());
}
/**
* Returns the number of bits of the md5 to include in the evaluated result.
*
* @return The bit count.
*/
public int getNumBits() {
return ((LongValue)getArg(1)).getValue().intValue();
}
}
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