* @param regex the regular expression pattern to match property names
     */
    protected void addFessCustomSystemProperties(final List<String> cmdList, final String regex) {
        if (StringUtil.isNotBlank(regex)) {
            final Pattern pattern = Pattern.compile(regex);
            System.getProperties()
                    .keySet()
                    .stream()

        }

        final BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();
        final String minimumShouldMatch = fessConfig.getQueryBoolMinimumShouldMatch();
        if (StringUtil.isNotBlank(minimumShouldMatch)) {
            boolQuery.minimumShouldMatch(minimumShouldMatch);
        }
        return new DefaultQueryBuilder(boolQuery);
    }

    /**

                            if (classAttr != null) {
                                final String value = classAttr.getNodeValue();
                                if (StringUtil.isNotBlank(value)) {
                                    final String[] values = value.split("\\.");
                                    nameSet.add(values[values.length - 1]);
                                }

        buf.append(code);
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String language = DocumentUtil.getValue(doc, fessConfig.getIndexFieldLang(), String.class);
        if (StringUtil.isNotBlank(language)) {
            for (final String f : langFields) {
                buf.append(";ctx._source.").append(f).append('_').append(language).append("=ctx._source.").append(f);
            }
        }

        // create input source
        final InputSource is = new InputSource(new ByteArrayInputStream(accessResultData.getData()));
        if (StringUtil.isNotBlank(accessResultData.getEncoding())) {
            is.setEncoding(accessResultData.getEncoding());
        }

        // create handler
        final DocHandler handler = new DocHandler();

            final PrimaryCipher cipher = ComponentUtil.getPrimaryCipher();
            final String[] lines = value.split("[\r\n]");
            for (final String line : lines) {
                if (StringUtil.isNotBlank(line)) {
                    final int pos = line.indexOf('=');
                    if (pos == 0) {
                        paramMap.put("unknown." + (unknownKey + 1), line.substring(pos + 1).trim());

        if (crawlingInfoPager.id != null) {
            cb.query().docMeta().setId_Equal(crawlingInfoPager.id);
        }
        // TODO Long, Integer, String supported only.
        if (StringUtil.isNotBlank(crawlingInfoPager.sessionId)) {
            cb.query().setSessionId_Match(crawlingInfoPager.sessionId);
        }
        cb.query().addOrderBy_CreatedTime_Desc();
    }

    /**

        if (dataMap.remove(getParamValue(paramMap, "field.max_access_count", "max_access_count")) instanceof final String maxAccessCount
                && StringUtil.isNotBlank(maxAccessCount)) {
            try {
                return Long.parseLong(maxAccessCount);
            } catch (final NumberFormatException e) {
                if (logger.isDebugEnabled()) {

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String url = (String) doc.get(fessConfig.getIndexFieldUrl());
        if (StringUtil.isNotBlank(url)) {
            final SearchLogHelper searchLogHelper = ComponentUtil.getSearchLogHelper();
            final int count = searchLogHelper.getClickCount(url);
            doc.put(fessConfig.getIndexFieldClickCount(), count);

        }
    }

    @Override
    public boolean changePassword(final String username, final String password) {
        if (isTargetUser(username) && StringUtil.isNotBlank(password)) {
            return executeCommand(updateCommand, username, password) == 0;
        }
        return true;
    }

    @Override
    public User load(final User user) {
        return user;
    }