* @return the virtual host key, or empty string if blank or null
     */
    protected String getHostKey(final RelatedQuery entity) {
        final String key = entity.getVirtualHost();
        return StringUtil.isBlank(key) ? StringUtil.EMPTY : key;
    }

    /**
     * Retrieves related queries for a given search term.
     * The search is performed using the current virtual host context and

    }

    private void parseResponseHeaderConfig(final String value) {
        if (StringUtil.isBlank(value)) {
            defaultResponseHeaders = Collections.emptyList();
            return;
        }

        StreamUtil.split(value, "\n").of(stream -> stream.filter(StringUtil::isNotBlank).forEach(s -> {
            final String[] values = StringUtils.split(s, "=", 2);

            final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
            if (StringUtil.isNotBlank(httpAddress)) {
                cmdList.add("-D" + Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS + "=" + httpAddress);
            }
        }

        final String systemLastaEnv = System.getProperty("lasta.env");
        if (StringUtil.isNotBlank(systemLastaEnv)) {
            if ("web".equals(systemLastaEnv)) {

            // request parameter
            if (StringUtil.isNotBlank(parameterKey)) {
                processParameter(request, roleSet);
            }

            // request header
            if (StringUtil.isNotBlank(headerKey)) {
                processHeader(request, roleSet);
            }

            // cookie
            if (StringUtil.isNotBlank(cookieKey)) {

            final String accountFilter = fessConfig.getLdapAccountFilter();
            final String groupFilter = fessConfig.getLdapGroupFilter();
            if (StringUtil.isNotBlank(baseDn) && StringUtil.isNotBlank(accountFilter)) {
                final LdapManager ldapManager = ComponentUtil.getLdapManager();

 *   <li>org.codelibs.fess.crawler.entity.AccessResultData</li>
 *   <li>org.codelibs.core.lang.StringUtil</li>
 * </ul>
 *
 * @see org.codelibs.fess.crawler.Constants
 * @see org.codelibs.fess.crawler.exception.CrawlerSystemException
 * @see org.codelibs.fess.crawler.entity.AccessResultData
 * @see org.codelibs.core.lang.StringUtil
 */
public final class XmlUtil {

                wConfig.setExcludedUrls(getDefaultString("default.config.web.excludedUrls", StringUtil.EMPTY));
                wConfig.setIncludedDocUrls(getDefaultString("default.config.web.includedDocUrls", StringUtil.EMPTY));
                wConfig.setIncludedUrls(getDefaultString("default.config.web.includedUrls", StringUtil.EMPTY));

            if (StringUtil.isNotBlank(getIncludedDocUrls())) {
                final List<Pattern> urlPatterList = new ArrayList<>();
                final String[] urls = getIncludedDocUrls().split("[\r\n]");
                for (final String u : urls) {
                    final String v = systemHelper.normalizeConfigPath(u);
                    if (StringUtil.isNotBlank(v)) {

        if (StringUtil.isNotBlank(key)) {
            final List<String> nameList = attributes.get(key);
            if (nameList != null) {
                list.addAll(nameList);
            }
        }
        final String value = fessConfig.getSystemProperty("saml.default.groups");
        if (StringUtil.isNotBlank(value)) {

            final String includedUrlsStr = webConfig.getIncludedUrls() != null ? webConfig.getIncludedUrls() : StringUtil.EMPTY;
            final String excludedUrlsStr = webConfig.getExcludedUrls() != null ? webConfig.getExcludedUrls() : StringUtil.EMPTY;

            // num of threads
            final CrawlerContext crawlerContext = crawler.getCrawlerContext();
            final int numOfThread =