001/*
002 *     Copyright 2021 Siroshun09
003 *
004 *     Licensed under the Apache License, Version 2.0 (the "License");
005 *     you may not use this file except in compliance with the License.
006 *     You may obtain a copy of the License at
007 *
008 *         http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *     Unless required by applicable law or agreed to in writing, software
011 *     distributed under the License is distributed on an "AS IS" BASIS,
012 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *     See the License for the specific language governing permissions and
014 *     limitations under the License.
015 */
016
017package com.github.siroshun09.mcmessage.util;
018
019import org.jetbrains.annotations.Nullable;
020
021import java.util.Locale;
022
023public final class LocaleParser {
024
025    private LocaleParser() {
026        throw new UnsupportedOperationException();
027    }
028
029    public static @Nullable Locale parse(String str) {
030        if (str == null || str.isEmpty()) {
031            return null;
032        }
033
034        String[] segments = str.split("_", 3);
035        int length = segments.length;
036
037        if (length == 1) {
038            return new Locale(str); // language
039        }
040
041        if (length == 2) {
042            return new Locale(segments[0], segments[1]); // language + country
043        }
044
045        if (length == 3) {
046            return new Locale(segments[0], segments[1], segments[2]); // language + country + variant
047        }
048
049        return null;
050    }
051}