Main.java Source code

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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("");

    /**
     * 
     * Returns the "parent" locale of a given locale.
     * 
     * 
     * If the original locale is only language-based, the {@link #NULL_LOCALE}
     * object is returned.
     * 
     * 
     * If the original locale is {@link #NULL_LOCALE}, then <code>null</code>
     * is returned.
     * 
     *
     * @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;
    }

}