[news.eclipse.modeling.mdt.ocl] Re: New to EMF and OCL

[Richard Catlin <richard.m.catlin@xxxxxxxxx>]

Ed,

I'm not sure where I should use
self.hardwareNotes = 'hw1'

I am using the OCL text file, so should it be something like this?

package sizing

context: Architecture
if(true)
	self.hardwareNotes = 'hw1'
end

endpackage

Thank you for your help.

Regards,
Richard Catlin


On 8/6/2009 12:26 PM, Ed Willink wrote:
> Hi Richard
>
> setHardwareNotes is an implementation artefact created by EMF, it is not 
> part of the Ecore class, so it is not accessible from OCL, although the 
> OCL implementation may use it.
>
> You have defined a property so that is what you should use.
>
>     self.hardwareNotes = 'hw1'
>
>    Regards
>     
>     Ed Willink
>
>
> Richard Catlin wrote:
> > Further thoughts on this question:
> >
> > If I create a simple EClass called Architecture in Ecore with a 
> > property of "hardwareNotes", then when I generate the model, a 
> > setHardwareNotes(String name) method is generated.  When I use the 
> > Interactive OCL Console, I get the following error:
> >
> > self.setHardwareNotes('hw1')
> >
> > Cannot find operation (setHardwareNotes(String)) for the type 
> > (Architecture)
> >
> > How can I go about setting this?
> >
> > Thank you,
> > Richard
> >
> > On 8/4/2009 8:13 PM, Richard Catlin wrote:
> > > All,
> > >
> > > I am using the EMF Framework Validation Plug-in: "OCL Example".  It 
> > > allows me to write OCL expressions in a text file.
> > >
> > > Is it possible to set properties in the model based on OCL 
> > > expressions?  The OCL 2.0 Spec says that expressions are guaranteed 
> > > to be without side effects, but then goes on to say that OCL 
> > > expressio can be used to specify a state change (eg. in a 
> > > post-condition).
> > >
> > > Pardon me if this is an obvious question.  I am new to EMF and OCL.
> > >
> > > Thank you,
> > > Richard Catlin