| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.uima.fit.util; |
| |
| import java.lang.reflect.Field; |
| import java.util.Locale; |
| |
| /** |
| */ |
| public final class LocaleUtil { |
| |
| private LocaleUtil() { |
| // Utility method class. |
| } |
| |
| /** |
| * This method returns the locale constant for the given string. For example, see |
| * {@link Locale#US} as an example locale constant. To retrieve that locale using this method, |
| * pass in the string value "US". If there is no locale constant for the passed in string, then |
| * null is returned |
| * |
| * @param localeConstant |
| * a string value that names a locale constant. |
| * @return the corresponding locale or null if there is no locale for the provided string. |
| */ |
| public static Locale getLocaleConstant(String localeConstant) { |
| try { |
| Field field = Locale.class.getField(localeConstant); |
| if (field != null && field.getType().equals(Locale.class)) { |
| return (Locale) field.get(null); |
| } |
| } catch (Exception e) { |
| return null; |
| } |
| return null; |
| } |
| |
| /** |
| * This method passes through to {@link Locale#Locale(String)} unless the provided string contains |
| * a hyphen. If it does, then the string is split on the hyphen and the resulting strings are |
| * passed into the multi-parameter constructors of Locale. The passed in string should not contain |
| * more than two hyphens as the Locale constructor with the most params is three. |
| * |
| * @param localeString the locale string |
| * @return the parsed locale |
| */ |
| public static Locale createLocale(String localeString) { |
| String[] parts = localeString.split("[_-]", 3); |
| switch (parts.length) { |
| case 3: |
| return new Locale(parts[0], parts[1], parts[2]); |
| case 2: |
| return new Locale(parts[0], parts[1]); |
| case 1: |
| return new Locale(parts[0]); |
| default: |
| throw new IllegalArgumentException("Invalid locale: " + localeString); |
| } |
| } |
| |
| /** |
| * passes through to getLocaleConstant. If this returns null, then this method passes through to |
| * createLocale. |
| * |
| * @param localeString the locale string |
| * @return the parsed locale |
| */ |
| public static Locale getLocale(String localeString) { |
| Locale locale = getLocaleConstant(localeString); |
| if (locale != null) { |
| return locale; |
| } |
| return createLocale(localeString); |
| } |
| } |