CAS Client Dependency Injection

[Mark McLaren]

I was looking at the JA-SIG CAS Java client 3.0.0 code and was pleased
to see that it is using the Spring Framework.  I hope this is taken as
a constructive criticism but I was a little surprised to see the
various filters defined using constructor rather than setter based
dependency injection.  I was under the impression that generally the
preferred approach was usually setter injection?  As I understand it
setter injection is a bit more readable for the user and does not rely
on the order of the constructor arguments.

Would it be preferable to support both methods of initialization?

Mark