From: Spitfire <timid.gentoo@...>
Date: 2007-02-16T21:55:05+09:00
Subject: class design issues

   I have a class which takes an input and produces an object. Let's 
say, it takes inputs about specifications of a life-form, and then 
creates it (instantiates say an object, 'LifeForm'). Let's call this 
factory class 'Creator'. Now, my problem is how do I ensure that once 
'Creator' returns a 'LifeForm', any external/requestor class can only 
view the properties of LifeForm, that were set during creation, and not 
be able to modify them???
   How do I design these imaginary classes 'Creator' and 'LifeForm'?

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“I'm smart enough to know that I'm dumb.”
   - Richard P Feynman