}

    /**
     * Converts validation messages to a localized string representation for API responses.
     * Uses the request locale if available, otherwise defaults to English.
     *
     * @param validationMessagesLambda lambda function that adds validation messages
     * @return concatenated string of localized validation messages separated by spaces
     */

    /**
     * Retrieves the current user's locale from the request manager.
     *
     * @return the user's locale, or Locale.ROOT if not available
     */
    private static Locale getUserLocale() {
        final Locale locale = ComponentUtil.getRequestManager().getUserLocale();
        if (locale == null) {
            return Locale.ROOT;
        }
        return locale;
    }

    /**

        Locale locale = ComponentUtil.getRequestManager().getUserLocale();
        if (locale == null) {
            locale = Locale.ENGLISH;
        }
        String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldUrl(), String.class);
        if (url == null) {
            url = ComponentUtil.getMessageManager().getMessage(locale, "labels.search_unknown");
        }

     * Gets the help URL for a given base URL.
     *
     * @param url The base URL.
     * @return The localized help URL.
     */
    protected String getHelpUrl(final String url) {
        final Locale locale = ComponentUtil.getRequestManager().getUserLocale();
        if (locale != null) {
            final String lang = locale.getLanguage();
            if (ComponentUtil.getFessConfig().isOnlineHelpSupportedLang(lang)) {

     * 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());
    }

     *
     * @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();
    }