/**
     * Sets the HTTP method for the URL queue.
     *
     * @param method the HTTP method to be set (e.g., GET, POST, etc.)
     */
    void setMethod(String method);

    /**
     * Retrieves the URL from the queue.
     *
     * @return the URL as a String.
     */
    String getUrl();

    /**
     * Sets the URL for this UrlQueue.
     *
     * @param url the URL to be set
     */

    /**
     * Adds a URL to the queue.
     *
     * @param sessionId The session ID.
     * @param url The URL.
     */
    void add(String sessionId, String url);

    /**
     * Inserts a URL queue.
     *
     * @param urlQueue The URL queue.
     */
    void insert(QUEUE urlQueue);

    /**
     * Deletes a URL queue.
     *
     * @param sessionId The session ID.

    protected String sessionId;

    /** The HTTP method used for the URL in the queue. */
    protected String method;

    /** The URL from the queue. */
    protected String url;

    /** The metadata associated with the URL queue. */
    protected String metaData;

    /** The encoding of the URL queue. */
    protected String encoding;

    /** The parent URL of the current URL in the queue. */

        this.data = data;
    }

    /**
     * Add a child URL.
     * @param url the request data to add to the child URL set
     */
    public void addUrl(final RequestData url) {
        childUrlSet.add(url);
    }

    /**
     * Add child URLs.
     * @param c the collection of request data to add to the child URL set
     */
    public void addAllUrl(final Collection<RequestData> c) {

    /**
     * Returns the URL of the accessed resource.
     *
     * @return the URL
     */
    String getUrl();

    /**
     * Sets the URL of the accessed resource.
     *
     * @param url the URL
     */
    void setUrl(String url);

    /**
     * Returns the parent URL of the accessed resource.
     *
     * @return the parent URL
     */
    String getParentUrl();

    /**

    /** Delay in milliseconds after processing a URL */
    protected long delayMillisAfterProcessing = 0L;

    /** Delay in milliseconds when no URL is in the queue */
    protected long delayMillisAtNoUrlInQueue = 500L;

    /** Delay in milliseconds before processing a URL */
    protected long delayMillisBeforeProcessing = 0L;

    public void test_getClient_null() {
        String url;
        CrawlerClient client;

        url = null;
        client = clientFactory.getClient(url);
        assertNull(client);

        url = "";
        client = clientFactory.getClient(url);
        assertNull(client);

        url = " ";
        client = clientFactory.getClient(url);
        assertNull(client);
    }

/**
 * Service interface for managing URL filters.
 * Provides methods to add and remove include/exclude URL filters,
 * as well as retrieve the patterns of these filters.
 */
public interface UrlFilterService {

    /**
     * Adds a URL to the include filter list for the specified session.
     *
     * @param sessionId the ID of the session for which the URL filter is being added

        sessionMap.clear();
    }

    /**
     * Returns a list of access results for the specified URL across all sessions.
     * @param url the URL to search for
     * @return the list of access results for the URL
     */
    public synchronized List<AccessResultImpl<Long>> getAccessResultList(final String url) {
        final List<AccessResultImpl<Long>> acList = new ArrayList<>();

        assertEquals("http://hoge.com/peke.html", urlConvertHelper.convert(url));
    }

    public void test_convert_null() {
        String url;

        url = null;
        assertNull(urlConvertHelper.convert(url));

        url = "";
        assertEquals("", urlConvertHelper.convert(url));

        url = " ";
        assertEquals(" ", urlConvertHelper.convert(url));

    }