Design Patterns discussion

[Ray Ye <rayye AT Catena.com>]

The abstraction level is different. The Factory Method pattern is on the
Object that is returned by factory method, which could be of different types
with common interface. The Abstract Factory pattern is on the factory
itself, which is composed of multiple factory methods.

Hope this helps,

Cheers,

Ray


-----Original Message-----
From: Pablo Schor 
[mailto:pablo.schor AT lobruno.com.ar]
Sent: Thursday, October 30, 2003 8:53 AM
To: Mikal Ziane; 
gang-of-4-patterns AT cs.uiuc.edu
Subject: Re: [gang-of-4-patterns] Doubt on creational patterns..


Mikal, the thing is Abstract Factory always relies on Factory Method or
Prototype, cannot be implemented by itself, and I suppose that's the reason
of the confusion. Is that right?

Thanks,

Pablo


----- Original Message -----
From: "Mikal Ziane" 
<Mikal.Ziane AT lip6.fr>
To: 
<gang-of-4-patterns AT cs.uiuc.edu>
Sent: Tuesday, September 23, 2003 3:04 PM
Subject: RE : [gang-of-4-patterns] Doubt on creational patterns..


>    Abstract Factory addreses (parallel) families of products. Think of a
> matrix of products. Columns are families and rows are product "kinds".
Cells
> are concrete products. Abtract Factory lets you choose the column first
and
> the forget about this choice and think in terms of rows instead of
concrete
> (family-dependent) products.
>    Abstract Factory may rely on Factory Method or Prototype.
>    As for the so-called "class" versus "object" scope I would not pay too
> much attention to it: it's a pretty vague concept.
>    Hope this helps.
>
>    Mikal
>
>
>
> _______________________________________________
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> gang-of-4-patterns AT cs.uiuc.edu
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