On 9/11/06, jeffrschneider <[EMAIL PROTECTED]> wrote:
Let's take REST out of the equation for a second.
Do you consider the standard relational database as having a
polymorphic interface?
do('Select * from Employees')
Is 'do' polymorphic? Depends on the API suite that 'do' is part of. If 'do' is a unique operation on only relational datasets, then no. If 'do' is overloaded to apply to lots of different types of "objects", then yes.
Is 'select' polymorphic? Yes, since it works for all relational objects (ie tables).
Why/Why Not?
Thanks,
Jeff
--- In [email protected], "Nick Gall"
<[EMAIL PROTECTED]> wrote:
>
> "Using this definition, you could say that the combination of REST
services
> are polymorphic. You can not, however, say that an *individual*
service is
> polymorphic"
>
> Why in the world not? Different URIs can have the "same verb
applied to
> them", e.g., GET. So GET is polymorphic. What's so hard to grasp
about this?
>
> If basic OO concepts are this widely misunderstood, no wonder REST
is so
> widely misunderstood.
>
> "If the interface is explicit, then the polymorphic context should
be
> implied in the message." Actually it's dispatched off he URI.
> http://rest.nick.com/employee/123 dispatches to my employee
processing code
> and http://rest.nick.com/product/123 dispatches to my product
processing
> code. URI dispatching is done billions of times every day with
great ease
> and good enough efficiency. So what's the problem with polymorphic
REST
> verbs.
--
Nick Gall
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