Strategy that determines if the ticket is expired. Implementations of the Expiration Policy define their own rules on what they consider an expired Ticket to be.
@author Scott Battaglia
@version $Revision: 14064 $ $Date: 2007-06-10 09:17:55 -0400 (Sun, 10 Jun 2007) $
@since 3.0
This is a published and supported CAS Server 3 API.
@see org.jasig.cas.ticket.Ticket