Well, one thing you could do is have a subclass of Server called "InvalidServer" (or some better name), that would be returned by the Factory object in case the server is unreachable which you can fill with whatever error information that you need; optionally, you can stick connection error info into field in the ServerFactory; if there is a problem creating the connection, you can return undef, and then use the error fields to determine why and respond appropriately.

Note that the Factory method is quite common as an object pattern, and while it's the same as doing stuff in main, it's considered to be much safer (namespace collisions), so there's nothing wrong with using such a method.

Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain

In reply to Re: Re: Re: change object class during runtime by Masem
in thread change object class during runtime by busunsl

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