/*

 * Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

import java.util.Locale;

public class LocaleCategory {

    private static Locale base = null;

    private static Locale disp = null;

    private static Locale fmt = null;

    private static String enc = null;

    public static void main(String[] args) {

        Locale reservedLocale = Locale.getDefault();

        try {

            Locale.Builder builder = new Locale.Builder();

            base = builder.setLanguage(System.getProperty("user.language", ""))

                  .setScript(System.getProperty("user.script", ""))

                  .setRegion(System.getProperty("user.country", ""))

                  .setVariant(System.getProperty("user.variant", "")).build();

            disp = builder.setLanguage(

                    System.getProperty("user.language.display",

                                Locale.getDefault().getLanguage()))

                        .setScript(System.getProperty("user.script.display",

                                Locale.getDefault().getScript()))

                        .setRegion(System.getProperty("user.country.display",

                                Locale.getDefault().getCountry()))

                        .setVariant(System.getProperty("user.variant.display",

                                Locale.getDefault().getVariant())).build();

            fmt = builder.setLanguage(System.getProperty("user.language.format",

                                Locale.getDefault().getLanguage()))

                       .setScript(System.getProperty("user.script.format",

                                Locale.getDefault().getScript()))

                       .setRegion(System.getProperty("user.country.format",

                                Locale.getDefault().getCountry()))

                       .setVariant(System.getProperty("user.variant.format",

                                  Locale.getDefault().getVariant())).build();

            checkDefault();

            testGetSetDefault();

        } finally {

            // restore the reserved locale

            Locale.setDefault(reservedLocale);

        }

    }

    static void checkDefault() {

        if (!base.equals(Locale.getDefault()) ||

            !disp.equals(Locale.getDefault(Locale.Category.DISPLAY)) ||

            !fmt.equals(Locale.getDefault(Locale.Category.FORMAT))) {

            throw new RuntimeException("Some of the return values from getDefault() do not agree with the locale derived from \"user.xxxx\" system properties");

        }

    }

    static void testGetSetDefault() {

        try {

            Locale.setDefault(null, null);

            throw new RuntimeException("setDefault(null, null) should throw a NullPointerException");

        } catch (NullPointerException npe) {}

        Locale.setDefault(Locale.CHINA);

        if (!Locale.CHINA.equals(Locale.getDefault(Locale.Category.DISPLAY)) ||

            !Locale.CHINA.equals(Locale.getDefault(Locale.Category.FORMAT))) {

            throw new RuntimeException("setDefault() should set all default locales for all categories");

        }

    }

}