From: Albert Wagner <alwagner@...>
Date: 2002-08-27T22:58:03+09:00
Subject: Re: proxy class / little factory

On Monday 26 August 2002 10:01 pm, Tom Sawyer wrote:
> maybe someone can help me. i am trying to make a class such that when it
> is used it acts like one or another class based on an attribute. i wrote
> this little factory version:
>
> class Text
>
>   def new(component)
>     if component <= 1
>       return TextSingle.new
>     else
>       return TextMultiple.new
>     end
>   end
>
>   class TextSingle
>     def initilaize
>       ...
>     end
>   end
>
>   class TextMultiple
>     def initilaize
>       ...
>     end
>   end
>
> end
>
> this could work (i actually haven't run it) but the problem is that the
> type of the object returned is not Text, but TextSingle or TextMultiple.
> i need it to be Text. eg.
>
>   atext = Text.new(1)
>   p atext.class  # --> TextSingle
>
> for it it needs to be:
>
>   p atext.class  # --> Text
>
> suggestions?
>
> ~transami

Any reason why TextSingle and TextMultiple can't be subclassed from Text?