Eclipse Community Forums: Papyrus » Default value specified in OCL for properties

Help

Home

Home » Modeling » Papyrus » Default value specified in OCL for properties

Show: Today's Messages :: Show Polls :: Message Navigator

Default value specified in OCL for properties [message #1721727]

Fri, 29 January 2016 13:54

Sebastien GABEL

Messages: 16
Registered: July 2013

Junior Member

Hi,

Does anymore know if it's still possible to use OCL expressions to initialize default value for (derived) properties coming from a profile ?
After reading the "OCL in UML (using Papyrus)" chapter of the OCL documentation (Cf. section Property Initializers), I tried this from Papyrus Mars SR1 and Neon (Nighlty build) without success. Nothing particular into the Error log.
The documentation applies only to Papyrus Luna, in the newest versions, for example, it is no more possible to specify the context through the property pages.
Any clarification or any status on this point are welcome.
Thanks !

Report message to a moderator

Re: Default value specified in OCL for properties [message #1721781 is a reply to message #1721727]

Sat, 30 January 2016 10:09

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

This is an area that has been a bit vague in Ecore (no specification)
and UML/OCL (inadequate specification). The UML specification can be
interpreted as prohibiting it but I think we have drifted to trying to
make it work. There are however a number of hurdles to fall at between
your source and execution. Please provide a repro of what doesn't work
for you.

Regards

Ed Willink

On 29/01/2016 13:54, Sebastien GABEL wrote:
> Hi,
> Does anymore know if it's still possible to use OCL expressions to
> initialize default value for (derived) properties coming from a profile ?
> After reading the "OCL in UML (using Papyrus)" chapter of the OCL
> documentation (Cf. section Property Initializers), I tried this from
> Papyrus Mars SR1 and Neon (Nighlty build) without success. Nothing
> particular into the Error log.
> The documentation applies only to Papyrus Luna, in the newest versions,
> for example, it is no more possible to specify the context through the
> property pages.
> Any clarification or any status on this point are welcome.
> Thanks !

Report message to a moderator

Re: Default value specified in OCL for properties [message #1721786 is a reply to message #1721727]

Sat, 30 January 2016 13:30

Klaas Gadeyne

Messages: 165
Registered: July 2009

Senior Member

Hi Sebastien,

Sebastien GABEL wrote on Fri, 29 January 2016 08:54

Hi,

Does anymore know if it's still possible to use OCL expressions to initialize default value for (derived) properties coming from a profile ?

Do you refer to the specification of the initialValue, or to the evaluation of the expression you specify in a model to which your profile is applied?

The former is possible, although the context is not correctly set (yet?) the first time you type an expression. Don't know if there is a bug report about this in papyrus. You will/should note that, when you revisit the expression, that the expression parses correctly.

The latter is only possible if you use a static profile, IIRC. This is https://bugs.eclipse.org/bugs/show_bug.cgi?id=417845

Quote:

After reading the "OCL in UML (using Papyrus)" chapter of the OCL documentation (Cf. section Property Initializers), I tried this from Papyrus Mars SR1 and Neon (Nighlty build) without success. Nothing particular into the Error log.
The documentation applies only to Papyrus Luna, in the newest versions, for example, it is no more possible to specify the context through the property pages.
Any clarification or any status on this point are welcome.
Thanks !

The context should be set 'automatically', but it (at least on my mac) appears it is not yet set correctly the first time.

HTH,

Klaas

Report message to a moderator

Re: Default value specified in OCL for properties [message #1721875 is a reply to message #1721786]

Mon, 01 February 2016 08:58

Sebastien GABEL

Messages: 16
Registered: July 2013

Junior Member

Hi Klass, Hi Ed,
Thanks for your feedbacks.
Yes, I was referring to the specification of the initial value. I have to point out that my tests had been done in the context of a dynamic profile, probably the source of my initial question.

Report message to a moderator