return getComponent(POPULAR_WORD_HELPER);
    }

    /**
     * Gets the path mapping helper component.
     * @return The path mapping helper.
     */
    public static PathMappingHelper getPathMappingHelper() {
        return getComponent(PATH_MAPPING_HELPER);
    }

    /**
     * Gets the duplicate host helper component.
     * @return The duplicate host helper.
     */

        final String sessionId = crawlingInfoHelper.getCanonicalSessionId(responseData.getSessionId());
        final PathMappingHelper pathMappingHelper = ComponentUtil.getPathMappingHelper();
        final Date documentExpires = crawlingInfoHelper.getDocumentExpires(crawlingConfig);
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();

    public int doCrawl(final Options options) {
        if (logger.isInfoEnabled()) {
            logger.info("Starting Crawler...");
        }

        final PathMappingHelper pathMappingHelper = ComponentUtil.getPathMappingHelper();
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final long totalTime = systemHelper.getCurrentTimeAsLong();

        updateConfigListenerMap.put("Label", () -> Integer.toString(ComponentUtil.getLabelTypeHelper().load()));
        updateConfigListenerMap.put("PathMapping", () -> Integer.toString(ComponentUtil.getPathMappingHelper().load()));
        updateConfigListenerMap.put("RelatedContent", () -> Integer.toString(ComponentUtil.getRelatedContentHelper().load()));

                "file://home/taro/%E3%81%82.txt");

        PathMapping pathMapping = new PathMapping();
        pathMapping.setRegex("ftp:");
        pathMapping.setReplacement("file:");
        ComponentUtil.getPathMappingHelper().cachedPathMappingList.add(pathMapping);
        // ftp->file
        assertUrlLink("ftp:/home/taro/test.txt", //
                "file://home/taro/test.txt");
        assertUrlLink("ftp:/home/taro/あ.txt", //