Page Comparison

public Class SSOTicket implements TicketGrantingTicket {

    private final Date whenCreated = new Date();

    private final Principal authenticatedUser;

    private final ExpirationPolicy expPolicy;

    private final ExpirationPolicyFactory expPolicyFactory;


    public SSOTicket(Principal authenticatedUser, 
        ExpirationPolicy expPolicy, 
        ExpirationPolicyFactory expPolicyFactory) {
       this.authenticatedUser = authenticatedUser;
       this.expPolicy = expPolicy;
       this.expPolicyFactory = expPolicyFactory;
    }

    public Principal getUser() {
       return this.authenticatedUser;
    }

    public boolean isValid() {
         return this.expPolicy.isValid();
    }

    public void expire() {
        this.expPolicy.expire();
    }

    public TargettedTicket deriveTicket(URL target) {

        return new TargettedTicketImpl(target, this, this.expPolicyFactory.buildPolicyInstance());

    }

}

public Class ProxyGrantingTicket 
    implements TicketGrantingTicket, DerivedTicket {

    private final Date whenCreated = new Date();

    private final Principal authenticatedUser;

    private final ExpirationPolicy expPolicy;

    private final ExpirationPolicyFactory expPolicyFactory;

    private final TicketGrantingTicket parent;


    public ProxyGrantingTicket(Principal proxyingService, 
        ExpirationPolicy expPolicy, 
        ExpirationPolicyFactory expPolicyFactory, 
        TicketGrantingTicket parent) {

       this.authenticatedUser = authenticatedUser;
       this.expPolicy = expPolicy;
       this.expPolicyFactory = expPolicyFactory;
       this.parent = parent;
    }

    public Principal getUser() {
       return this.authenticatedUser;
    }

    public boolean isValid() {
         return this.expPolicy.isValid();
    }

    public void expire() {
        this.expPolicy.expire();
    }

    public TargettedTicket deriveTicket(URL target) {

        return new TargettedTicketImpl(target, this, this.expPolicyFactory.buildPolicyInstance());

    }

    public TicketGrantingTicket getParant() {
        return this.parent;
    }

}

public Class TargettedTicketImpl implements TargettedTicket {

    private final Date whenCreated = new Date();

    private final ExpirationPolicy expPolicy;

    private final TicketGrantingTicket parent;

    private final URL target;


    public SSOTicket(URL target, TicketGrantingTicket parent, ExpirationPolicy expPolicy) {
       this.target = target;
       this.parent = parent;
       this.expPolicy = expPolicy;
    }

    public boolean isValid() {
         return this.expPolicy.isValid()
             && this.parent.isValid();
    }

    public URL getTarget() {
        return this.target;
    }

    public List getPrincipalChain() {
      
      List principalChain = new ArrayList();
      for (TicketGrantingTicket ancestor = 
        this.parent; ancestor != null; ancestor = ancestor.getParent()) {

           principalChain.add(ancestor.getPrincipal());

      }

      return principalChain;

    }

}