/**
     * Returns the last modified time of the accessed resource.
     *
     * @return the last modified time
     */
    Long getLastModified();

    /**
     * Sets the last modified time of the accessed resource.
     *
     * @param lastModified the last modified time
     */
    /**
     * Sets the last modified time of the accessed resource.
     *

    CLEANUP_CRAWLING,
    /** Indicates an unsupported URL was encountered when crawling started. */
    UNSUPPORTED_URL_AT_CRAWLING_STARTED,
    /** Indicates checking the last modified date of a resource. */
    CHECK_LAST_MODIFIED,
    /** Indicates the resource has not been modified. */
    NOT_MODIFIED,
    /** Indicates getting content from a resource. */
    GET_CONTENT,
    /** Indicates a redirect location was found. */
    REDIRECT_LOCATION,

 * and processing of Sitemap data.
 * </p>
 *
 * <p>
 * The {@code loc} attribute specifies the URL of the Sitemap, while the {@code lastmod} attribute
 * indicates the last time the Sitemap file was modified.  The {@code lastmod} attribute is used by crawlers
 * to incrementally fetch sitemaps that have been updated since a certain date.
 * </p>
 *
 * <p>

     */
    void setDepth(Integer depth);

    /**
     * Returns the last modified timestamp of the URL in the queue.
     *
     * @return the last modified timestamp as a Long value.
     */
    Long getLastModified();

    /**
     * Sets the last modified timestamp for the URL queue entry.
     *

<map version="0.7.1">
<node TEXT="&#12479;&#12452;&#12488;&#12523;">
<node TEXT="&#12486;&#12473;&#12488;" MODIFIED="1237874353965" STYLE="fork"/>
</node>

     */
    public static final int OK_STATUS = 0;

    /**
     * The status code for Not Modified.
     */
    public static final int NOT_MODIFIED_STATUS = 304;

    /**
     * The HTTP status code for OK.
     */
    public static final int OK_STATUS_CODE = 200;

    /**
     * The HTTP status code for Not Modified.
     */
    public static final int NOT_MODIFIED_STATUS_CODE = 304;

    /**

/**
 * Implementation of the {@link UrlQueue} interface.
 * This class represents a URL to be crawled, storing its ID, session ID,
 * HTTP method, URL, metadata, encoding, parent URL, depth, last modified time,
 * creation time, and weight.
 *
 * @param <IDTYPE> the type of the identifier for the URL queue entry
 */
public class UrlQueueImpl<IDTYPE> implements UrlQueue<IDTYPE> {

     */
    public static final String PARENT_URL = "parentUrl";

    /**
     * Field name for depth.
     */
    public static final String DEPTH = "depth";

    /**
     * Field name for last modified timestamp.
     */
    public static final String LAST_MODIFIED = "lastModified";

    /**
     * Field name for creation time.
     */
    public static final String CREATE_TIME = "createTime";

    /**

    /**
     * Field name for content length.
     */
    public static final String CONTENT_LENGTH = "contentLength";

    /**
     * Field name for last modified timestamp.
     */
    public static final String LAST_MODIFIED = "lastModified";

    /**
     * Field name for access result data.
     */

     * Datetime format. This format allows you to omit the time portion, if
     * desired, and use YYYY-MM-DD.
     *
     * Note that this tag is separate from the If-Modified-Since (304) header
     * the server can return, and search engines may use the information from
     * both sources differently.
     */
    private String lastmod;

    /**