Eclipse Community Forums: QVT-OML » Pass a type as an argument

Help

Home

Home » Modeling » QVT-OML » Pass a type as an argument

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

Pass a type as an argument [message #1273604]

Thu, 20 March 2014 08:50

Denis Nikiforov

Messages: 167
Registered: August 2013

Senior Member

Hi!

Is it possible to pass a type as an argument to a mapping or query? Something like this:

modeltype ECORE uses 'http://www.eclipse.org/emf/2002/Ecore';

query ExprSingle::addParens(type : ECORE::EClass) : ExprSingle =
    if self.oclIsKindOf(type) then
        self
    else
        object ParenthesizedExpr { expr := self }
    endif;

Report message to a moderator

Re: Pass a type as an argument [message #1273633 is a reply to message #1273604]

Thu, 20 March 2014 09:41

Ed Willink

Messages: 5347
Registered: July 2009

Senior Member

Hi

Type arguments are under-specified in OCL at present, but should be
sorted out in OCL 2.5; the Pivot OCL supports a Metaclass(T) analoguous
to Java's Class<T>.

For Classic OCL and consequently QVTo, you will need to use EMF for
reflective operation, so self.eClass().isSuperTypeOf(...)

Regards

Ed Willink

On 20/03/2014 08:50, Denis Nikiforov wrote:
> Hi!
>
> Is it possible to pass a type as an argument to a mapping or query?
> Something like this:
>
> modeltype ECORE uses 'http://www.eclipse.org/emf/2002/Ecore';
>
> query ExprSingle::addParens(type : ECORE::EClass) : ExprSingle =
> if self.oclIsKindOf(type) then
> self
> else
> object ParenthesizedExpr { expr := self }
> endif;

Report message to a moderator

Previous Topic:	Swapping out EvaluationVisitor to add instrumentation (dependency injection...?)
Next Topic:	Change in Helper/Mapping behaviour from QVTO 3.2.2 to 3.3.0

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Fri Aug 18 03:17:03 GMT 2017

.:: Contact :: Home ::.