* Returns {@link DecimalFormatSymbols}.
     *
     * @param locale
     *            The locale. Must not be {@literal null}.
     * @return {@link DecimalFormatSymbols}
     */
    public static DecimalFormatSymbols getDecimalFormatSymbols(final Locale locale) {
        assertArgumentNotNull("locale", locale);

        DecimalFormatSymbols symbols = CACHE.get(locale);
        if (symbols == null) {

     *
     * @param locale
     *            Locale. Must not be {@literal null}.
     * @return the pattern string for {@link DateFormat#MEDIUM} style
     */
    public static String getMediumPattern(final Locale locale) {
        assertArgumentNotNull("locale", locale);
        return ((SimpleDateFormat) getTimeInstance(MEDIUM, locale)).toPattern();
    }

    /**

     *
     * @param locale
     *            Locale. Must not be {@literal null}.
     * @return the pattern string for {@link DateFormat#MEDIUM} style
     */
    public static String getMediumPattern(final Locale locale) {
        assertArgumentNotNull("locale", locale);
        return ((SimpleDateFormat) getDateTimeInstance(MEDIUM, MEDIUM, locale)).toPattern();
    }

    /**

     *
     * @param locale the locale (must not be {@literal null})
     * @return the pattern string for {@link DateFormat#MEDIUM} style
     */
    public static String getMediumPattern(final Locale locale) {
        assertArgumentNotNull("locale", locale);
        return ((SimpleDateFormat) getDateInstance(MEDIUM, locale)).toPattern();
    }

    /**

        // Execute
        OptionalThing<Locale> result = provider.findBusinessLocale(null, mockRequestManager);

        // Verify
        assertTrue(result.isPresent());
        Locale locale = result.get();
        assertEquals("no", locale.getLanguage());
        assertEquals("NO", locale.getCountry());
        assertEquals("NY", locale.getVariant());
    }

        // Test with various locale configurations
        Locale[] testLocales = { Locale.US, Locale.UK, Locale.CANADA, Locale.FRANCE, Locale.CHINA, Locale.KOREA, new Locale("es", "ES"),
                new Locale("pt", "BR") };

        for (Locale locale : testLocales) {
            OptionalThing<String> result = provider.determineAlias(locale);

            }
        };

        assertEquals(Locale.ROOT, fessConfig.getQueryLocaleFromName(null));
        assertEquals(Locale.ROOT, fessConfig.getQueryLocaleFromName(""));
        assertEquals(Locale.ROOT, fessConfig.getQueryLocaleFromName("ja"));
        assertEquals(Locale.JAPANESE, fessConfig.getQueryLocaleFromName("test_ja"));
        assertEquals(Locale.CHINESE, fessConfig.getQueryLocaleFromName("test_zh"));

     *
     * @param locale the locale
     * @return the {@literal locale} if not {@literal null}, otherwise the default locale
     */
    protected static Locale getLocale(final Locale locale) {
        if (locale != null) {
            return locale;
        }
        return LocaleUtil.getDefault();
    }

     *
     * @param locale
     *            Locale
     * @return Separator for decimal numbers
     */
    public static String findDecimalSeparator(final Locale locale) {
        final DecimalFormatSymbols symbol = getDecimalFormatSymbols(locale);
        return Character.toString(symbol.getDecimalSeparator());
    }

    private static DecimalFormatSymbols getDecimalFormatSymbols(final Locale locale) {

     *
     * @param s
     *            A string representing a number
     * @param locale
     *            The locale. Must not be {@literal null}.
     * @return The normalized string
     */
    public static String normalize(final String s, final Locale locale) {
        assertArgumentNotNull("locale", locale);

        if (s == null) {
            return null;
        }