[omniORB] type checking

[Michael Brenner]

Thanks, Richard.  But, you specify the return types by hand, right? Given that 
they are already defined in the IDL I had thought there was a way to access them 
directly somehow.  However, the only thing I have is pthe ython stubs generated 
by omniIDL -bpython.  And those are very underspecified, so can't really be used 
for type checking (I think, but hope to be proven wrong).

Cheers,

	michael





Ridgway, Richard (London) schrieb:
> I use something like this decorator (borrowed from pyExcelerator. I
> think I've seen similar but more convoluted example in zope?). Not quite
> what you want, but maybe workable.
> 
> def returns(t):
>   def check_returns(f):
>     def new_f(*args,**kwds):
>       val = f(*args,**kwds)
>       assert isinstance(val,t)
>       return val
>     return new_f
>   return check_returns
> 
> @returns(str)
> def bob():
>   return "string"
> 
> @returns(str)
> def bob_not_str():
>   return 1
> 
>>>> bob()
> 'string'
> 
>>>> bob_not_str()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<stdin>", line 5, in new_f
> AssertionError
> 
> 
> 
> -----Original Message-----
> From: omniorb-list-bounces at omniorb-support.com
> [mailto:omniorb-list-bounces at omniorb-support.com] On Behalf Of Michael
> Brenner
> Sent: 03 July 2008 17:39
> To: omniorb-list at omniorb-support.com
> Subject: [omniORB] type checking
> 
> 
> Hi,
> 
> I'm calling a python server from a java client.  Is there a way I can
> type check 
> the return values in python, ie assert that they confirm to the out
> parameters 
> specified in the IDL, and die gracefully (and with a helful message) if
> they 
> don't?  Right now, I'm getting org.omg.CORBA.BAD_PARAM errors - which
> don't give 
> me any clue about what went wrong.
> 
> Cheers,
> 
>      michael
> 
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