/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * 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 com.sun.org.apache.xml.internal.utils;

import java.util.Locale;

/**

 * @author Igor Hersht, igorh@ca.ibm.com

 */

public class LocaleUtility {

    /**

     * IETF RFC 1766 tag separator

     */

    public final static char IETF_SEPARATOR = '-';

    public final static String EMPTY_STRING = "";

 public static Locale langToLocale(String lang) {

       if((lang == null) || lang.equals(EMPTY_STRING)){ // not specified => getDefault

            return Locale.getDefault();

       }

        String language = EMPTY_STRING;

        String country =  EMPTY_STRING;

        String variant =  EMPTY_STRING;

        int i1 = lang.indexOf(IETF_SEPARATOR);

        if (i1 < 0) {

            language = lang;

        } else {

            language = lang.substring(0, i1);

            ++i1;

            int i2 = lang.indexOf(IETF_SEPARATOR, i1);

            if (i2 < 0) {

                country = lang.substring(i1);

            } else {

                country = lang.substring(i1, i2);

                variant = lang.substring(i2+1);

            }

        }

        if(language.length() == 2){

           language = language.toLowerCase();

        }else {

          language = EMPTY_STRING;

        }

        if(country.length() == 2){

           country = country.toUpperCase();

        }else {

          country = EMPTY_STRING;

        }

        if((variant.length() > 0) &&

        ((language.length() == 2) ||(country.length() == 2))){

           variant = variant.toUpperCase();

        }else{

            variant = EMPTY_STRING;

        }

        return new Locale(language, country, variant );

    }

 }