/**
     * {@inheritDoc}
     *
     * @see jcifs.SmbPipeHandle#isOpen()
     */
    @Override
    public boolean isOpen () {
        return this.open && this.handle != null && this.handle.isValid();
    }


    /**
     * 
     * {@inheritDoc}
     *
     * @see jcifs.smb.SmbPipeHandleInternal#getSessionKey()
     */
    @Override

    /**
     * 
     * @param cifsContext
     * @param singingEnforced
     * @param request
     * @return whether the protocol negotiation was successful
     */
    boolean isValid ( CIFSContext cifsContext, SmbNegotiationRequest request );


    /**
     * 
     * @return selected dialect
     */
    DialectVersion getSelectedDialect ();


    /**
     * 

    // Throws exception if not working correctly
    HostSpecifier unused = HostSpecifier.fromValid(spec);
    unused = HostSpecifier.from(spec);
    assertTrue(HostSpecifier.isValid(spec));
  }

  private void assertBad(String spec) {
    try {
      HostSpecifier.fromValid(spec);
      fail("Should have thrown IllegalArgumentException: " + spec);

     *
     * @throws IOException
     *             if a network error occurs
     */

    @Override
    public void close () throws IOException {
        try {
            if ( this.handle.isValid() ) {
                this.handle.close();
            }
        }
        finally {
            this.file.clearAttributeCache();
            this.tmp = null;
        }
    }


    /**

     * @throws SmbException
     */
    public int getFid () throws SmbException {
        if ( !isValid() ) {
            throw new SmbException("Descriptor is no longer valid");
        }
        return this.fid;
    }


    public byte[] getFileId () throws SmbException {
        if ( !isValid() ) {
            throw new SmbException("Descriptor is no longer valid");
        }
        return this.fileId;

    // Throws exception if not working correctly
    HostSpecifier unused = HostSpecifier.fromValid(spec);
    unused = HostSpecifier.from(spec);
    assertTrue(HostSpecifier.isValid(spec));
  }

  private void assertBad(String spec) {
    try {
      HostSpecifier.fromValid(spec);
      fail("Should have thrown IllegalArgumentException: " + spec);

    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.SmbWatchHandle#watch()
     */
    @Override
    public List<FileNotifyInformation> watch () throws CIFSException {
        if ( !this.handle.isValid() ) {
            throw new SmbException("Watch was broken by tree disconnect");
        }
        try ( SmbTreeHandleImpl th = this.handle.getTree() ) {

            CommonServerMessageBlockRequest req;

public interface SmbFileHandle extends AutoCloseable {

    /**
     * @return the tree
     */
    SmbTreeHandle getTree ();


    /**
     * @return whether the file descriptor is valid
     */
    boolean isValid ();


    /**
     * @param lastWriteTime
     * @throws CIFSException
     */
    void close ( long lastWriteTime ) throws CIFSException;


    /**
     * {@inheritDoc}
     *

        Iterables.concat(INVALID_NAME, VALID_IP_ADDRS, INVALID_IP_ADDRS);

    for (String valid : validCases) {
      assertTrue(valid, InternetDomainName.isValid(valid));
    }

    for (String invalid : invalidCases) {
      assertFalse(invalid, InternetDomainName.isValid(invalid));
    }
  }

  public void testToString() {
    for (String inputName : SOMEWHERE_UNDER_PS) {

                .filter(s -> !requiredValidator.isValid(source.get(s), null)).collect(Collectors.toList()));
    }

    default boolean isNonEmptyValue(final Object value) {
        final RequiredValidator requiredValidator = new RequiredValidator();
        return requiredValidator.isValid(value, null);
    }

    String getCrawlerDocumentSpaceChars();