* than a handful of exceptions. But it seems prudent to set a cap on how many we'll cache.
         * This avoids out-of-control memory consumption, and it keeps the cache from growing so
         * large that doing the lookup is noticeably slower than redoing the work would be.
         *
         * Ideally we'd have a real eviction policy, but until we see a problem in practice, I hope

    protected int maxErrorCount = 2;

    /** List of finished crawler session IDs for cleanup */
    protected List<String> finishedSessionIdList = new ArrayList<>();

    /** List of document boost matchers for scoring enhancement */
    private final List<DocBoostMatcher> docBoostMatcherList = new ArrayList<>();

    /** List of active crawler instances */
    private List<Crawler> crawlerList;

    /**
     * Logger instance for this class.
     */
    protected static final Logger logger = LogManager.getLogger(ThumbnailManager.class);

    /**
     * Base directory for storing thumbnail files.
     */
    protected File baseDir;

    /**
     * List of available thumbnail generators.
     */
    protected final List<ThumbnailGenerator> generatorList = new ArrayList<>();

    /**

t:"\f20b"}.fa-shield-alt:before{content:"\f3ed"}.fa-ship:before{content:"\f21a"}.fa-shipping-fast:before{content:"\f48b"}.fa-shirtsinbulk:before{content:"\f214"}.fa-shoe-prints:before{content:"\f54b"}.fa-shopping-bag:before{content:"\f290"}.fa-shopping-basket:before{content:"\f291"}.fa-shopping-cart:before{content:"\f07a"}.fa-shopware:before{content:"\f5b5"}.fa-shower:before{content:"\f2cc"}.fa-shuttle-van:before{content:"\f5b6"}.fa-sign:before{content:"\f4d9"}.fa-sign-in-alt:before{content:"\f2...

  private final int startIndex;
  private final KnownOrder knownOrder;

  /**
   * Meta-exception thrown by {@link AbstractIteratorTester.MultiExceptionListIterator} instead of
   * throwing any particular exception type.
   */
  private abstract static class PermittedMetaException extends RuntimeException {
    static final PermittedMetaException UOE_OR_ISE =

        // This is a design choice for this specific implementation
        assertNull(emptyIterator.next(), "This implementation returns null instead of throwing");

        // Verify remove can be called (even though no-op)
        assertDoesNotThrow(() -> emptyIterator.remove(), "remove() should be safe to call");

        // Verify still empty after operations

     * this file is open. This constant may be logically OR'd with other share
     * access flags.
     */
    int FILE_SHARE_DELETE = 0x04;
    /**
     * Default sharing mode for files
     */
    int DEFAULT_SHARING = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;

    /**
     * Returned by {@link jcifs.SmbResource#getType()} if the resource this <code>SmbFile</code>

    write, and/or delete the file while the jCIFS user has the file open.
     *
     * @param url An smb URL representing the file to write to
     * @param shareAccess File sharing flag: <code>SmbFile.FILE_NOSHARE</code> or any combination of <code>SmbFile.FILE_READ</code>, <code>SmbFile.FILE_WRITE</code>, and <code>SmbFile.FILE_DELETE</code>
     * @throws SmbException if an SMB error occurs

    /** Map of session IDs to URL queues for managing crawling queues. */
    protected volatile Map<String, Queue<UrlQueueImpl<Long>>> urlQueueMap = new HashMap<>();

    /** Map of session IDs to access result maps for storing crawling results. */
    protected volatile Map<String, Map<String, AccessResultImpl<Long>>> sessionMap = new HashMap<>();

    /** Map of session IDs to include URL patterns for filtering URLs. */

 * @since 15.0
 */
@GwtCompatible
@SuppressWarnings("EscapedEntity") // We do mean for the user to see "<" etc.
public abstract class UnicodeEscaper extends Escaper {
  /** The amount of padding (chars) to use when growing the escape buffer. */
  private static final int DEST_PAD = 32;

  /** Constructor for use by subclasses. */
  protected UnicodeEscaper() {}

  /**