Parser.java

/**
 * Copyright 1999-2009 The Pegadi Team
 *
 * Licensed 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.pegadi.util;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Locale;



/**
 * This class provides helper methods for common parsing tasks.
 *
 * @author Håvard Wigtil <havardw at pvv.org>
 * @version $Revision$, $Date$
 */
public class Parser {

     private static Logger log = LoggerFactory.getLogger(Parser.class);
    /**
     * Creates a new locale from a string on the form
     * <code>[lang]_[country]_[variant], e.g. <code>no_NO_NY</code>.
     * The <code>country</code> and <code>variant</code> parts of
     * the string are optional.
     *
     * @param locale  The string to be parsed.
     * @return  The new locale.
     * @see java.util.Locale
     */
    public static Locale parseLocale(String locale) {
        String lang, country, variant;

        log.debug("org.pegadi.util.Parser.parseLocale: Locale is " + locale);

        int i = locale.indexOf('_');
        log.debug("org.pegadi.util.Parser.parseLocale: i is " + i);

        if (i != -1) {
            lang = locale.substring(0, i);
            log.debug("org.pegadi.util.Parser.parseLocale: Lang is " + lang);

            int j = locale.indexOf('_', i+1);
            log.debug("org.pegadi.util.Parser.parseLocale: j is " + j);

            if (j != -1) {
                country = locale.substring(i+1, j);
                log.debug("org.pegadi.util.Parser.parseLocale: Country is " + country);
                variant = locale.substring(j+1);
                log.debug("org.pegadi.util.Parser.parseLocale: Variant is " + variant);
            }
            else {
                country = locale.substring(i+1);
                variant = "";
            }
        }
        else {
            lang    = locale;
            country = "";
            variant = "";
        }

        return new java.util.Locale(lang, country, variant);
    }
}