return b == null ? null : checkNotNull(doBackward(b));
    } else {
      return unsafeDoBackward(b);
    }
  }

  /*
   * LegacyConverter violates the contract of Converter by allowing its doForward and doBackward
   * methods to accept null. We could avoid having unchecked casts in Converter.java itself if we

    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new SsoLoginException with the specified detail message.
     *
     * @param message The detail message explaining the SSO login failure
     */
    public SsoLoginException(final String message) {
        super(message);
    }

    /**
     * Constructs a new SsoLoginException with the specified detail message and cause.
     *

    private ASN1ObjectIdentifier mechanism;

    private int result = UNSPECIFIED_RESULT;

    /**
     * Default constructor for NegTokenTarg
     */
    public NegTokenTarg() {
    }

    /**
     * Constructs a NegTokenTarg with the specified parameters
     * @param result the negotiation result code
     * @param mechanism the selected authentication mechanism OID

    /**
     * Constructs a new JobProcess with the specified process.
     * Uses the default buffer size and no output callback.
     *
     * @param process the system process to wrap
     */
    public JobProcess(final Process process) {
        this(process, InputStreamThread.MAX_BUFFER_SIZE, null);
    }

    /**

    private static final long serialVersionUID = 1L;

    /** The message code for internationalized error messages. */
    private final transient VaMessenger<FessMessages> messageCode;

    /**
     * Constructs a new SSO message exception with message code, detailed message, and cause.
     *
     * @param messageCode The message code for internationalized error display
     * @param message The detailed error message

        super(getMessageByDcerpcError(error));
        this.error = error;
    }

    /**
     * Constructs a DcerpcException with the specified message
     *
     * @param msg
     *            the error message
     */
    public DcerpcException(final String msg) {
        super(msg);
    }

    /**
     * Constructs a DcerpcException with the specified message and root cause
     *
     * @param msg

    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new SSO process exception with the specified detailed message.
     *
     * @param message The detailed error message explaining the cause of the exception
     */
    public SsoProcessException(final String message) {
        super(message);
    }

    /**
     * Constructs a new SSO process exception with the specified detailed message and cause.
     *

  private int position;

  /** Returns the element with the specified index. This method is called by {@link #next()}. */
  @ParametricNullness
  protected abstract E get(int index);

  /**
   * Constructs an iterator across a sequence of the given size whose initial position is 0. That
   * is, the first call to {@link #next()} will return the first element (or throw {@link
   * NoSuchElementException} if {@code size} is zero).
   *

    private KerberosApRequest apRequest;

    /**
     * Constructs a KerberosToken from token bytes.
     *
     * @param token the token bytes
     * @throws PACDecodingException if token decoding fails
     */
    public KerberosToken(byte[] token) throws PACDecodingException {
        this(token, null);
    }

    /**
     * Constructs a KerberosToken from token bytes with decryption keys.
     *

 *
 * @author mbechler
 */
public class AvTimestamp extends AvPair {

    /**
     * Constructs an AvTimestamp from raw byte data
     *
     * @param raw the raw byte data for the timestamp AV pair
     */
    public AvTimestamp(final byte[] raw) {
        super(AvPair.MsvAvTimestamp, raw);
    }

    /**
     * Constructs an AvTimestamp with the specified timestamp value
     *