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Struts & Hibernate
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| | | Subject: Doubts on design patterns | Subject: Doubts on design patterns 2004-04-28 - By Ben Hill
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> -- --Original Message-- --
> From: Ram Kishore [mailto:ramkishore.pasupunoori@(protected)]
> Sent: 28 April 2004 10:52
> To: J2EEPATTERNS-INTEREST@(protected)
> Subject: Re: Doubts on design patterns
>
>
> Hi Ben,
> Both Decorator and Chain of Responsibility (CoR) are
> dynamic in nature. Decorator attach/detach the
> responsibilities at run time and COR propagates the request
> thru a series of request handlers (decouples the sender and
> receiver) and can do some pre or post processing on the request.
>
> Correct me If I'm wrong...don't you find any similarities b/w
> both of them.
They are similar - as a banana is similar to a melon - but that wasn't the
question though. The original question was what is the *main difference*
between the two. I attempted to explain that thinking about these two
patterns in terms of their dissimilarity is not necessarily the right way to
think.
They are placed in their categories to make it easier to select a pattern to
use in a particular context. The fact that they are both dynamic doesn't
change the intention that the COR is used in a very different way to a
Decorator.
Cheers,
Ben
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