* <p>
     * 次のように使います．
     * </p>
     *
     * <pre>
     * StringUtil.defaultString(null, "NULL")  = "NULL"
     * StringUtil.defaultString("", "NULL")    = ""
     * StringUtil.defaultString("aaa", "NULL") = "aaa"
     * StringUtil.defaultString("aaa", null) = "aaa"
     * StringUtil.defaultString(null, null) = null
     * </pre>
     *
     * @param str

        assertEquals("c", StringUtil.substringToLast("abc", "b"));
        assertEquals("c", StringUtil.substringToLast("abcbc", "b"));
        assertEquals("abc", StringUtil.substringToLast("abc", ""));
        assertEquals("abc", StringUtil.substringToLast("abc", null));
        assertEquals("abc", StringUtil.substringToLast("abc", "dddd"));
    }

    /**
     * @throws Exception
     */

            credentials = new NTCredentials(username, password == null ? StringUtil.EMPTY : password,
                    workstation == null ? StringUtil.EMPTY : workstation, domain == null ? StringUtil.EMPTY : domain);
        } else {
            credentials = new UsernamePasswordCredentials(username, password == null ? StringUtil.EMPTY : password);
        }
        return credentials;
    }

        putResultDataBody(dataMap, fessConfig.getIndexFieldVirtualHost(),
                stream(crawlingConfig.getVirtualHosts()).get(stream -> stream.filter(StringUtil::isNotBlank).collect(Collectors.toList())));
        // TODO date
        // lang
        if (StringUtil.isNotBlank(fessConfig.getCrawlerDocumentFileDefaultLang())) {

            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)) {

            final String includedPaths = labelType.getIncludedPaths();
            final String excludedPaths = labelType.getExcludedPaths();
            if (StringUtil.isNotBlank(includedPaths) || StringUtil.isNotBlank(excludedPaths)) {
                try {
                    list.add(new LabelTypePattern(labelType.getValue(), includedPaths, excludedPaths));
                } catch (final Exception e) {

        final List<String> pagingQueryList = new ArrayList<>();
        if (form.ex_q != null) {
            stream(form.ex_q).of(stream -> stream.filter(StringUtil::isNotBlank).distinct()
                    .forEach(q -> pagingQueryList.add("ex_q=" + LaFunctions.u(q))));
        }
        if (StringUtil.isNotBlank(form.sort)) {
            pagingQueryList.add("sort=" + LaFunctions.u(form.sort));
        }
        if (form.lang != null) {

        final String defaultLang = ComponentUtil.getFessConfig().getCrawlerDocumentHtmlDefaultLang();
        if (StringUtil.isNotBlank(defaultLang)) {
            return defaultLang;
        }

        return normalizeLang(value);
    }

    public String normalizeLang(final String value) {
        if (StringUtil.isBlank(value)) {
            return null;
        }

            final String s = file.toUri().toString();
            final String b = basePath.toUri().toString();
            final String id = s.replace(b, StringUtil.EMPTY).replace("." + imageExtention, StringUtil.EMPTY).replace("/", StringUtil.EMPTY);
            if (logger.isDebugEnabled()) {
                logger.debug("Base: {} File: {} DocId: {}", b, s, id);
            }
            return id;
        }

            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)) {