}

    /**
     * Gets the path mapping list for a session.
     *
     * @param sessionId the session ID
     * @return the path mapping list
     */
    public List<PathMapping> getPathMappingList(final String sessionId) {
        if (sessionId == null) {
            return null;
        }
        return pathMappingMap.get(sessionId);
    }

    /**
     * Replaces URL for crawling.

            ptList.add(Constants.PROCESS_TYPE_CRAWLING);
            ptList.add(Constants.PROCESS_TYPE_BOTH);
            pathMappingHelper.setPathMappingList(options.sessionId, pathMappingService.getPathMappingList(ptList));

            // duplicate host
            try {
                final DuplicateHostHelper duplicateHostHelper = ComponentUtil.getDuplicateHostHelper();
                duplicateHostHelper.init();