}
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        langFields = fessConfig.getIndexerLanguageFieldsAsArray();
        supportedLanguages = fessConfig.getSupportedLanguagesAsArray();
        maxTextLength = fessConfig.getIndexerLanguageDetectLengthAsInteger();
    }

    public void updateDocument(final Map<String, Object> doc) {