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Re: Call a method from a class [message #47563 is a reply to message #47555]

Thu, 16 February 2006 04:43

Antonio Santiago
Messages: 201
Registered: February 2004

Senior Member

vcarlos wrote:
> Hi all,
>
> In some languages is possible to call methods from a Class, instead of
> a object. For instance, the class Messager could call a method
> reportError, message. This is useful when I just need a "instance" of
> that object and everybody takes advantage of that (I think that is
> similar to Singleton design pattern). Is there any way to the same in
> IDL? Or I should set up some kind of library procedures/functions and
> use through my program?
>
> Thanks a lot
>
> Vinicius
>

Take care betweem "call methods from a Class" and a "Singleton".

The Singleton is a design pattern and it means that only exists one
instance of an object in the whole application.

a= OBJ_NEW('Some_thing')

b= OBJ_NEW('Some_thing')

'a' and 'b' are the same reference.

"Call methods of a class" is known in other languages as "static
methods" or "class methods" and it means you don't need to create an
instance to invoque a methods, only put the name of the class and the
method.

d = Image.getData()

I hope this will be usefull for you,
bye :)

--
-----------------------------------------------------
Antonio Santiago Pï¿½rez
( email: santiago<<at>>grahi.upc.edu )
( www: http://www.grahi.upc.edu/santiago )
( www: http://asantiago.blogsite.org )
-----------------------------------------------------
Grup de Recerca Aplicada en Hidrometeorologia (GRAHI)
Universitat Politï¿½cnica de Catalunya
Barcelona - SPAIN
-----------------------------------------------------
http://www.grahi.upc.edu
-----------------------------------------------------

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[Message index]

		Re: Call a method from a class By: vcarlos on Thu, 16 February 2006 10:06
		Re: Call a method from a class By: Antonio Santiago on Thu, 16 February 2006 04:43
		Re: Call a method from a class By: David Fanning on Wed, 15 February 2006 11:41

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