}

    /**
     * Checks if the log level is DEBUG.
     *
     * @return true if DEBUG, false otherwise
     */
    public boolean isDebugEnabled() {
        return DEBUG.equals(logLevel);
    }

    /**
     * Checks if the log level is INFO.
     *
     * @return true if INFO, false otherwise
     */
    public boolean isInfoEnabled() {
        return INFO.equals(logLevel);
    }

     * - Digits (0-9)
     * - Special characters: . - * _ : / + % = & ? # [ ] @ ~ ! $ ' ( ) , ;
     *
     * @param c the character to check
     * @return {@code true} if the character is a valid URL character, {@code false} otherwise
     */
    public static boolean isUrlChar(final char c) {
        if (c >= 'a' && c <= 'z' //
                || c >= 'A' && c <= 'Z' //
                || c >= '0' && c <= '9' //

    /**
     * Flag indicating whether the crawler runs in background mode.
     */
    protected boolean background = false;

    /**
     * Flag indicating whether crawler threads run as daemon threads.
     */
    protected boolean daemon = false;

    /**
     * Priority for crawler threads.
     */
    protected int threadPriority = Thread.NORM_PRIORITY;

    /**

        final String cmd = command.trim();
        final List<String> cmdList = new ArrayList<>();
        final StringBuilder buf = new StringBuilder(100);
        boolean singleQuote = false;
        boolean doubleQuote = false;
        char prevChar = ' ';
        for (int i = 0; i < cmd.length(); i++) {
            final char c = cmd.charAt(i);
            if (c == ' ' && !singleQuote && !doubleQuote && buf.length() > 0) {

     * A header is considered valid if its name is not blank and its value is not null.
     * @return true if the header is valid, false otherwise.
     */
    public boolean isValid() {
        if (StringUtil.isBlank(name) || value == null) {
            return false;
        }

        return true;
    }

     * @return true if the URL is new, otherwise false.
     */
    protected boolean isNewUrl(final UrlQueueImpl<Long> urlQueue, final Queue<UrlQueueImpl<Long>> urlQueueList) {

        final String url = urlQueue.getUrl();
        if (StringUtil.isBlank(url)) {
            if (logger.isDebugEnabled()) {
                logger.debug("URL is a blank: {}", url);
            }
            return false;
        }

     */
    /**
     * Checks if the rule manager contains the specified rule.
     * @param rule the rule to check for
     * @return true if the rule is present, false otherwise
     */
    @Override
    public boolean hasRule(final Rule rule) {
        return ruleList.contains(rule);
    }

    /*
     * (non-Javadoc)
     *
     * @see

    /**
     * A constant for no transformer.
     */
    public static final String NO_TRANSFORMER = "NONE";

    /**
     * A constant for "false".
     */
    public static final String FALSE = "false";

    /**
     * A constant for "UTF-8".
     */
    public static final String UTF_8 = "UTF-8";

    /**
     * A constant for UTF-8 charset.
     */

        try {
            final File tempFile = File.createTempFile(prefix, suffix, directory);
            tempFile.setReadable(false, false);
            tempFile.setReadable(true, true);
            tempFile.setWritable(false, false);
            tempFile.setWritable(true, true);
            return tempFile;
        } catch (final IOException e) {

     * @param obj the object to compare with
     * @return true if the objects are equal, false otherwise
     */
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        RequestData other = (RequestData) obj;