1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.usbtuner.util; 18 19 import java.util.HashSet; 20 import java.util.Locale; 21 22 /** 23 * Utility class for ISO codes. 24 */ 25 public final class IsoUtils { 26 private static final HashSet<String> ISO3_LANGUAGES = new HashSet<>(); 27 28 static { 29 String[] languages = Locale.getISOLanguages(); 30 for (String lang : languages) { 31 Locale locale = new Locale(lang); 32 ISO3_LANGUAGES.add(locale.getISO3Language()); 33 } 34 } 35 36 private IsoUtils() { } 37 38 /** 39 * Returns {@code true} if a {@link String} is a valid ISO-639-2/T language code. 40 */ 41 public static boolean isValidIso3Language(String langCode) { 42 return ISO3_LANGUAGES.contains(langCode); 43 } 44 } 45
