if (value instanceof Date) {
                return DEFAULT_DATE_PRINTER.print(((Date) value).getTime());
            }
            return null;
        }

        @Override
        public Object getAsObject(final String value) {
            if (StringUtil.isEmpty(value)) {
                return null;
            }
            return new Timestamp(DEFAULT_DATE_PRINTER.parseMillis(value));
        }

            }
            if (converter == null) {
                return value;
            }
        }
        try {
            if (value.getClass() == String.class) {
                return converter.getAsObject((String) value);
            }
            return converter.getAsString(value);
        } catch (final Throwable cause) {
            throw new ConverterRuntimeException(destPropertyName, value, cause);
        }

    /**
     * {@inheritDoc}
     *
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString () {
        return "Kerb5Authenticatior[subject=" + ( this.getSubject() != null ? this.getSubject().getPrincipals() : null ) + ",user=" + this.user
                + ",realm=" + this.realm + "]";
    }

            putValue(data, "Sender", message.getSender());
            putValue(data, "Sent-Date", message.getSentDate());
            putValue(data, "Size", message.getSize());
            putValue(data, "Subject", message.getSubject());
            putValue(data, "Receipients", message.getAllRecipients());
            putValue(data, "To", message.getRecipients(Message.RecipientType.TO));

            }
        }


        @Override
        public Kerb5Authenticator clone () {
            Kerb5Authenticator auth = new RefreshableKerb5Authenticator(getSubject(), getUserDomain(), getUser(), getPassword());
            cloneInternal(auth, this);
            return auth;
        }
    }

        if ( t.isAssignableFrom(this.getClass()) ) {
            return (T) this;
        }
        return null;
    }


    @Override
    public Subject getSubject () {
        return null;
    }


    @Override
    public void refresh () throws CIFSException {}


    /**
     * 
     * {@inheritDoc}
     *