Re: [henshin-dev] programatically creating rules and Graphs

[huma@xxxxxxxxxxxxxxxxxxxxx]

Hi,

My task is that i want to dynamically match rules in two different  
transformation systems on the basis of the elements in their LHS and  
RHS. This matching is to decide whether the two transformation systems  
have similar rules or not. The matching of element may consider  
multiple factors, e.g., the types of the elements, the structure of  
LHS and RHS of the two rules, etc. Can matching API help me in this  
regard? if not is there any support by henshin to do such a matching?


Quoting Christian Krause <henshin.ck@xxxxxxxxx>:

> Hi Zilla,
>
> I am not sure what you mean by "compare/match rules with each  
> other". Henshin targets arbitrary EMF models. Since the Henshin  
> model for defining transformations is itself an EMF model, you can  
> define rules that match other rules. This is the whole idea of  
> HO-transformations. If you meant something else, maybe try to  
> explain in more detail what you are trying to achieve.
>
> Cheers,
> Christian
>
> On 07/12/2012 03:19 PM, Zille Huma wrote:
> > Hi,
> >
> > As a related question to my last query, I am curious to know  
> > whether any of the henshin plugins provide the facility to  
> > compare/match rules with eachother. By this i mean whether it is  
> > possible to compare the elements in the LHS or RHS of different  
> > rules. As far as i understood, the matching plugin is used to match  
> > actual graphs to the transformation rules.
> >
> > best Regards,
> > Zille
> >
> > On 7/12/2012 8:03 AM, Christian Krause wrote:
> > > Hi.
> > >
> > > that is very easy. You can use the HenshinFactory to create rules  
> > > etc. at runtime. It would look like this:
> > >
> > > Rule rule = HenshinFactory.eINSTANCE.createRule();
> > > ...
> > >
> > > After you have created your rules or units, you can directly apply  
> > > them using the interpreter (see the interpreter wiki and the  
> > > source code in the examples).
> > >
> > > Another way to create a rule (or transformation unit etc.) is  
> > > using higher-order (HO) transformations. Here the idea is to  
> > > create or modify a rule or unit using a transformation. We  
> > > currently have two examples of HO-transformations on our website.  
> > > This one here is good starting point:
> > >
> > > http://www.eclipse.org/modeling/emft/henshin/examples.php?example=combpattern
> > >
> > > There a rule which matches a comb-like pattern of variable width  
> > > is created using a HO-order transformation (see section  
> > > "Generating and matching the comb pattern").
> > >
> > > I hope this helps.
> > >
> > > Cheers,
> > > Christian
> > >
> > >
> > >
> > > On 07/11/2012 05:54 PM, ? wrote:
> > > > hi all,
> > > > I want to programatically create a Rule in a transformation  
> > > > system. I want to create rules programatically and then  
> > > > programatically combine their left and right hand side. Is there  
> > > > a way to create Graph, Rule programatically?
> > > >
> > > > Best
> > > >
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> > >
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> >
> > --
> > Zille Huma
> > Database and Information Systems
> > Institute of Computer Science
> > University of Paderborn
> > Zukunftsmeile 1
> > 33102 Paderborn, Germany
> >
> > Tel : +49(0)5251/60-3355
> > Fax : +49(0)5251/60-3431
> >
> > Email:zille.huma@xxxxxx
> >
> >
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