From: George Moschovitis <gm@...>
Date: 2004-10-12T17:09:36+09:00
Subject: Re: [Q] case based on object class

>      If the original poster is still reading, what is the real
> application?  Is there some reason you need to know the class, or do you
> just need to assure that the class has some behaviour?

here is a snippet from the real application (ndb). I want to make the 
following code more elegant (I dont care for efficiency this code only
runs once :))

     102     s, klass = prop.symbol, prop.klass
     103
     104     module_eval %{
     105       def #{s}
     106         return @#{s}
     107       end
     108
     109       def #{s}=(val)
     110         @#{s} = val
     111       end
     112
     113       def __force_#{s}(val)
     114           @#{s} = } + case klass.name
     115                         when Fixnum.name
     116                           "val.to_i()"
     117                         when String.name
     118                           "val.to_s()"
     119                         when Float.name
     120                           "val.to_f()"
     121                         when Time.name
     122                           "Time.parse(val.to_s())"
     123                         when TrueClass.name, FalseClass.name
     124                           "val.to_i() > 0"
     125                         else
     126                           "val"
     127                       end + %{
     128       end
     129     }
     130   end


regards,
George Moschovitis

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