Comments on: PTOM: Descriptive State Enumeration

By: derick.bailey

derick.bailey — Tue, 02 Dec 2008 16:48:37 +0000

@Dennis Leng

That was supposed to be a ‘protected’ constructor. Sorry about that.

By: Dennis Leng

Dennis Leng — Mon, 01 Dec 2008 20:19:03 +0000

Hi Derick, why you created a private constructor for OrderStatus class, which couldnt be instanciated. the code won’t compile as the result of that. cheers

By: derick.bailey

derick.bailey — Thu, 27 Nov 2008 13:09:04 +0000

@Eamon

good catch. I completely forgot about that when writing this up. I use Resharper to generate the equality checks for me, in my state classes.

By: Eamon

Eamon — Thu, 27 Nov 2008 13:02:59 +0000

Serialisation can bite you here with the enumeration pattern. Be sure to override Equals() on the OrderStatus class because deserialisation will not respect your static ‘Enumeration’ classes.

e.g.
order.Status = OrderStatus.Totaled
order2 = Deserialise(Serialise(order));
now order.Status != order2.Status

Eamon

By: derick.bailey

derick.bailey — Thu, 27 Nov 2008 00:22:18 +0000

@Maxim – can do. That will be my next post.

By: Maxim Tihobrazov

Maxim Tihobrazov — Wed, 26 Nov 2008 21:18:27 +0000

It would be great if you explain how to use this stuff with NHibernate