orbit-python-list

[Orbit-python-list] two questions

[Eugene S. <eu...@en...>]

hello all ppl!
i have a question: what's about interface inheritance in o-p? as i can
see, i need to implement methods of parent interface for all children?
or i'm not?
also i don't understand how to work with CORBA exception declaration in
o-p.

Re: [Orbit-python-list] two questions

[Jason T. <ta...@au...>]

On Mon, 2002-02-11 at 01:40, Eugene Sizikov wrote:
> hello all ppl!

Hi Eugene.

> i have a question: what's about interface inheritance in o-p? as i can
> see, i need to implement methods of parent interface for all children?
> or i'm not?

CORBA supports inheritance only at the interface level.  Implementors of
a hierarchy can inherit their own implementation, of course, but CORBA
does not provide a means to inherit someone else's.

> also i don't understand how to work with CORBA exception declaration in
> o-p.

You might want to look at the test suite under the src/ directory
(test-suite.idl, test-server, and test-client) for an example of custom
exceptions.  If you have any specific questions, feel free to ask here.

Jason.

-- 
Academic Computing Support Specialist
Algoma University College
Sault Ste. Marie, Ontario
705-949-2301 x330                                   Personal Home Page
http://www.auc.ca                                     http://sault.org

Re: [Orbit-python-list] two questions

[<eu...@en...>]

From: "Jason Tackaberry" <ta...@au...>
To: "Eugene Sizikov" <eu...@en...>
Cc: <orb...@li...>
Sent: Monday, February 11, 2002 11:16 PM
Subject: Re: [Orbit-python-list] two questions


> On Mon, 2002-02-11 at 01:40, Eugene Sizikov wrote:
> > hello all ppl!
> 
> Hi Eugene.
> 
> > i have a question: what's about interface inheritance in o-p? as i can
> > see, i need to implement methods of parent interface for all children?
> > or i'm not?
> 
> CORBA supports inheritance only at the interface level.  Implementors of
> a hierarchy can inherit their own implementation, of course, but CORBA
> does not provide a means to inherit someone else's.

But it would be nice to use the python class inheritance here, wouldn't it?

> 
> > also i don't understand how to work with CORBA exception declaration in
> > o-p.
> 
> You might want to look at the test suite under the src/ directory
> (test-suite.idl, test-server, and test-client) for an example of custom
> exceptions.  If you have any specific questions, feel free to ask here.
> 
> Jason.
> 
> -- 
> Academic Computing Support Specialist
> Algoma University College
> Sault Ste. Marie, Ontario
> 705-949-2301 x330                                   Personal Home Page
> http://www.auc.ca                                     http://sault.org

Re: [Orbit-python-list] two questions

[Christian R. R. <ki...@as...>]

On Tue, 12 Feb 2002, [koi8-r] =E5=D7=C7=C5=CE=C9=CA =F3=C9=DA=C9=CB=CF=D7 w=
rote:

> > CORBA supports inheritance only at the interface level.  Implementors o=
f
> > a hierarchy can inherit their own implementation, of course, but CORBA
> > does not provide a means to inherit someone else's.
>
> But it would be nice to use the python class inheritance here, wouldn't i=
t?

I think you can, simply by having something like:

IDL class -> base class -> your class

You can probably use mixins too.

Take care,
--
Christian Reis, Senior Engineer, Async Open Source, Brazil.
http://async.com.br/~kiko/ | [+55 16] 272 3330 | NMFL

Re: [Orbit-python-list] two questions

[Jason T. <ta...@au...>]

> I think you can, simply by having something like:
> IDL class -> base class -> your class

Not quite.  You're right about mix-ins though.  You want something like
this.

    module Example {
    	interface A {
    		void one();
    	};
    	interface B : A {
    		void two();
    	};
    };
    

    import CORBA
    import Example, Example__POA
    
    class A(Example__POA.A):
    	def one(self):
    		print "A::one"
    
    class B(Example__POA.B, A):
    	def one(self):
    		A.one(self)
    		print "B::one"
    
    	def two(self):
    		print "B::two"
    
Cheers,
Jason.
	
-- 
Academic Computing Support Specialist
Algoma University College
Sault Ste. Marie, Ontario
705-949-2301 x330                                   Personal Home Page
http://www.auc.ca                                     http://sault.org