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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.List;
import java.util.stream.Collectors;
/**
* This class represents an uca-function in a {@link GroupingExpression}.
*
* @author Ulf Lilleengen
* @author bratseth
*/
public class UcaFunction extends FunctionNode {
private final String locale;
private final String strength;
/**
* Constructs a new instance of this class.
*
* @param exp The expression to evaluate.
* @param locale The locale to used for sorting.
*/
public UcaFunction(GroupingExpression exp, String locale) {
this(null, null, Arrays.asList(exp, new StringValue(locale)));
}
/**
* Constructs a new instance of this class.
*
* @param exp The expression to evaluate.
* @param locale The locale to used for sorting.
* @param strength The strength level to use.
*/
public UcaFunction(GroupingExpression exp, String locale, String strength) {
this(null, null, Arrays.asList(exp, new StringValue(locale), new StringValue(strength)));
if ( ! validStrength(strength))
throw new IllegalArgumentException("Not a valid UCA strength: " + strength);
}
private UcaFunction(String label, Integer level, List<GroupingExpression> args) {
super("uca", label, level, args);
this.locale = ((StringValue)args.get(1)).getValue();
this.strength = args.size() > 2 ? ((StringValue)args.get(2)).getValue() : "TERTIARY";
}
@Override
public UcaFunction copy() {
return new UcaFunction(getLabel(),
getLevelOrNull(),
args().stream().map(arg -> arg.copy()).toList());
}
private boolean validStrength(String strength) {
return (strength.equals("PRIMARY") ||
strength.equals("SECONDARY") ||
strength.equals("TERTIARY") ||
strength.equals("QUATERNARY") ||
strength.equals("IDENTICAL"));
}
public String getLocale() {
return locale;
}
public String getStrength() {
return strength;
}
}
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