if (length <= 0) {
            return StringUtils.EMPTY;
        }
        if (length >= buf.length()) {
            return buf.toString();
        }
        return buf.substring(buf.length() - length, buf.length());
    }

     */
    protected RequestData getDuplicateUrl(final RequestData requestData) {
        final String url = requestData.getUrl();
        if (url.endsWith("/")) {
            requestData.setUrl(url.substring(0, url.length() - 1));
        } else {
            requestData.setUrl(url + "/");
        }
        return requestData;
    }

    /**

     */
    private static String getDateString(final String text) {
        for (final String dow : DAY_OF_WEEK) {
            final int i = text.lastIndexOf(dow);
            if (i != -1) {
                return text.substring(i);
            }
        }
        return null;
    }

    String getFileName(final String resourceName) {
        final String name = resourceName.replaceAll("/+$", "");
        final int pos = name.lastIndexOf('/');
        if (pos >= 0) {
            return name.substring(pos + 1);
        }
        return name;
    }

    private void executeCommand(final File inputFile, final File outputFile) {

        if (StringUtil.isBlank(command)) {

        if (id.length() <= idPrefixLength) {
            return id;
        }
        return id.substring(0, idPrefixLength) + MessageDigestUtil.digest("SHA-256", id.substring(idPrefixLength));
    }

    /**
     * Extracts the URL from the target object using reflection.
     *
     * @param target The target object.

     */
    public static String createSuggestTextId(final String text) {
        final String id = encoder.encodeToString(text.getBytes(CoreLibConstants.CHARSET_UTF_8));
        if (id.length() > 445) {
            return id.substring(0, ID_MAX_LENGTH);
        }
        return id;
    }

    /**
     * Parses the given query string and returns an array of keywords.
     *
     * @param q the query string to be parsed

            // wrong state
            return;
        }

        final int idx = url.indexOf('/', url.indexOf("://") + 3);
        String hostUrl;
        if (idx >= 0) {
            hostUrl = url.substring(0, idx);
        } else {
            hostUrl = url;
        }
        final String robotTxtUrl = hostUrl + "/robots.txt";

        // check url

                            if (isPrefix || "xmlns".equals(aname)) {
                                final int index = aname.indexOf(':');
                                final String p = isPrefix ? aname.substring(index + 1) : StringUtil.EMPTY;
                                if (p.equals(prefix)) {
                                    namespace = attr.getNodeValue();
                                    break;