logger.debug("pattern1: {}, pattern2: {}", pattern1Str, pattern2Str);
        }
        if (pattern1Str != null) {
            pattern1 = Pattern.compile(pattern1Str);
            pattern2 = Pattern.compile(pattern2Str);
        }
    }

    @Override
    public TokenStream create(final TokenStream tokenStream) {
        return new PatternConcatenationFilter(tokenStream, pattern1, pattern2);
    }

        final List<Pattern> includeList = getUrlFilterService().getIncludeUrlPatternList(sessionId);
        final List<Pattern> excludeList = getUrlFilterService().getExcludeUrlPatternList(sessionId);

        if (!includeList.isEmpty()) {
            boolean match = false;
            for (final Pattern pattern : includeList) {
                final Matcher matcher = pattern.matcher(url);

        }
        int current = 0;
        boolean added = false;
        final Map<Pattern, CrawlerClient> newClientMap = new LinkedHashMap<>();
        for (final Map.Entry<Pattern, CrawlerClient> entry : clientMap.entrySet()) {
            if (pos == current) {
                newClientMap.put(Pattern.compile(regex), client);
                added = true;
            }

     * @param regex the regular expression pattern
     */
    public void addRule(final String key, final String regex) {
        regexMap.put(key, Pattern.compile(regex));
    }

    /**
     * Adds a compiled regular expression rule for the specified field.
     * @param key the field name to match against
     * @param pattern the compiled regular expression pattern
     */

    }

    /**
     * Adds a password for files matching the given regular expression pattern.
     * @param regex the regular expression pattern to match against URLs or resource names
     * @param password the password to use for matching files
     */
    public void addPassword(final String regex, final String password) {
        passwordMap.put(Pattern.compile(regex), password);
    }

    /**

    }

    /**
     * Adds an include URL pattern for the specified session.
     * @param sessionId the session ID
     * @param url the URL pattern to include
     */
    public synchronized void addIncludeUrlPattern(final String sessionId, final String url) {
        final List<Pattern> patternList = getIncludeUrlPatternList(sessionId);
        patternList.add(Pattern.compile(url));
    }

    /**

    /**
     * Pattern for XML tags.
     */
    protected Pattern xmlTagPattern = Pattern.compile("<[^>]+>");

    /**
     * Returns the encoding pattern.
     * @return The encoding pattern.
     */
    @Override
    protected Pattern getEncodingPattern() {
        return xmlEncodingPattern;
    }

    /**

    }

    /**
     * Gets the list of include URL patterns for the specified session.
     *
     * @param sessionId The session ID.
     * @return The list of compiled include patterns.
     * @throws CrawlerSystemException if the patterns cannot be loaded.
     */
    @Override
    public List<Pattern> getIncludeUrlPatternList(final String sessionId) {
        try {

    protected static final Pattern ALLOW_RECORD = Pattern.compile("^allow:\\s*([^\\s]*)\\s*$", Pattern.CASE_INSENSITIVE);

    /** Pattern for parsing crawl-delay records. */
    protected static final Pattern CRAWL_DELAY_RECORD = Pattern.compile("^crawl-delay:\\s*([^\\s]+)\\s*$", Pattern.CASE_INSENSITIVE);

    /**
     * Pattern for Sitemap record.
     */

          "pattern": "/^((?!question).)*$/is"
        },
        {
          "type": "descriptionMatches",
          "pattern": "/^((?!Describe the feature).)*$/is"
        },
        {
          "type": "titleMatches",
          "pattern": "/^((?!critical|urgent).)*$/s"
        },
        {
          "type": "descriptionMatches",
          "pattern": "/^((?!critical|urgent).)*$/s"
        }
      ]