facetInfo.query = queries;
        final String sizeStr = request.getParameter("facet.size");
        if (StringUtil.isNotBlank(sizeStr)) {
            facetInfo.size = Integer.parseInt(sizeStr);
        }
        final String minDocCountStr = request.getParameter("facet.minDocCount");
        if (StringUtil.isNotBlank(minDocCountStr)) {
            facetInfo.minDocCount = Long.parseLong(minDocCountStr);
        }

     *
     * @return the application type string, or empty string if not set
     */
    public static String getAppType() {
        final String appType = System.getenv(FESS_APP_TYPE);
        if (StringUtil.isNotBlank(appType)) {
            return appType;
        }
        return StringUtil.EMPTY;
    }

    /**
     * Gets the override configuration path from environment variable when running in Docker.

                stream(crawlingConfig.getVirtualHosts()).get(stream -> stream.filter(StringUtil::isNotBlank).collect(Collectors.toList())));
        // id
        putResultDataBody(dataMap, fessConfig.getIndexFieldId(), crawlingInfoHelper.generateId(dataMap));
        // parentId
        String parentUrl = responseData.getParentUrl();
        if (StringUtil.isNotBlank(parentUrl)) {
            parentUrl = pathMappingHelper.replaceUrl(sessionId, parentUrl);

     *
     * @param msg the error message to add; ignored if null or blank
     */
    public static void addError(final String msg) {
        if (StringUtil.isNotBlank(msg)) {
            errors.offer(msg);
        }
    }

    /**
     * Command-line options container for the crawler application.
     * This class uses args4j annotations to define command-line arguments

        final String username = fessConfig.getFesenUsername();
        final String password = fessConfig.getFesenPassword();
        if (StringUtil.isNotBlank(username) && StringUtil.isNotBlank(password)) {
            final String value = username + ":" + password;
            final String basicAuth = "Basic " + java.util.Base64.getEncoder().encodeToString(value.getBytes(StandardCharsets.UTF_8));

            String userCode = (String) request.getAttribute(Constants.USER_CODE);
            if (StringUtil.isNotBlank(userCode)) {
                return userCode;
            }

            userCode = getUserCodeFromRequest(request);
            if (StringUtil.isNotBlank(userCode)) {
                return userCode;
            }

            if (!request.isRequestedSessionIdValid()) {

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String name = fessConfig.getQueryBrowserLangParameterName();
        if (StringUtil.isNotBlank(name)) {
            try {
                return requestManager.getParameter(name).filter(StringUtil::isNotBlank).map(LocaleUtils::toLocale);
            } catch (final Exception e) {
                logger.debug("Failed to parse a value of {}.", name, e);
            }

        };
    }

    @Override
    public boolean isValid(final String value, final ConstraintValidatorContext context) {
        if (StringUtil.isNotBlank(value)) {
            return check(protocols, value);
        }
        return true;
    }

    /**
     * Checks if the given value matches any of the specified protocols.
     *

        if (StringUtil.isNotBlank(fileConfigPager.name)) {
            cb.query().setName_Wildcard(wrapQuery(fileConfigPager.name));
        }
        if (StringUtil.isNotBlank(fileConfigPager.paths)) {
            cb.query().setPaths_Wildcard(wrapQuery(fileConfigPager.paths));
        }
        if (StringUtil.isNotBlank(fileConfigPager.description)) {

    @Override
    public String getQuery() {
        return q;
    }

    @Override
    public String[] getExtraQueries() {
        return stream(ex_q).get(stream -> stream.filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n]));
    }

    @Override
    public Map<String, String[]> getFields() {
        return fields;
    }

    @Override
    public Map<String, String[]> getConditions() {