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/*
* $Id: LocaleUtil.java 667964 2008-06-15 15:00:54Z apetrelli $
*
* 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.
*/
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
/**
* Utilities for locale manipulation.
*
* @version $Rev: 667964 $ $Date: 2008-06-15 17:00:54 +0200 (Sun, 15 Jun 2008) $
* @since 2.1.0
*/
public class Main {
/**
* The "null" Locale, i.e. a Locale that points to no real locale.
*
* @since 2.1.0
*/
public static final Locale NULL_LOCALE = new Locale("");
/**
* <p>
* Returns the "parent" locale of a given locale.
* </p>
* <p>
* If the original locale is only language-based, the {@link #NULL_LOCALE}
* object is returned.
* </p>
* <p>
* If the original locale is {@link #NULL_LOCALE}, then <code>null</code>
* is returned.
* </p>
*
* @param locale The original locale.
* @return The parent locale.
*/
public static Locale getParentLocale(Locale locale) {
Locale retValue = null;
String language = locale.getLanguage();
String country = locale.getCountry();
String variant = locale.getVariant();
if (!"".equals(variant)) {
retValue = new Locale(language, country);
} else if (!"".equals(country)) {
retValue = new Locale(language);
} else if (!"".equals(language)) {
retValue = NULL_LOCALE;
}
return retValue;
}
}
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