final Set<String> langSet = new HashSet<>();
            final Enumeration<Locale> locales = request.getLocales();
            if (locales != null) {
                while (locales.hasMoreElements()) {
                    final Locale locale = locales.nextElement();
                    final String normalizeLang = systemHelper.normalizeLang(locale.toString());
                    if (normalizeLang != null) {

        // 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);

            return normalizeQueryLanguages(requestLangs);
        }

        if (locales == null) {
            return StringUtil.EMPTY_STRINGS;
        }

        return normalizeQueryLanguages(Collections.list(locales).stream().map(locale -> {
            final String language = locale.getLanguage();
            final String country = locale.getCountry();
            if (StringUtil.isNotBlank(language)) {

        /**
         * Returns the locale.
         *
         * @return The locale.
         */
        public Locale getLocale() {
            return locale;
        }

        /**
         * Sets the locale.
         *
         * @param locale The locale.
         */
        public void setLocale(final Locale locale) {
            this.locale = locale;
        }
    }

    /**

        try {
            final String localeStr = locale.toString();
            return langItemsCache.get(localeStr);
        } catch (final ExecutionException e) {
            final List<Map<String, String>> langItems = new ArrayList<>(supportedLanguages.length);
            final String msg = ComponentUtil.getMessageManager().getMessage(locale, "labels.allLanguages");

     */
    public static Locale getLocale(final String localeStr) {
        // TODO replace with Fess
        Locale locale = LocaleUtil.getDefault();
        if (localeStr != null) {
            final int index = localeStr.indexOf('_');
            if (index < 0) {
                locale = new Locale(localeStr);
            } else {
                final String language = localeStr.substring(0, index);

            }
        };

        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
     *            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();
    }

    /**