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goal for new objects in a transformation [message #1214821]

Wed, 27 November 2013 21:41

Rudolf Weber

Messages: 11
Registered: February 2013

Junior Member

Hello,

I want to create Objects in the modelpackage itself.
The Objects are created directly in the xmi-Model at first level, and not as childs in a package.

The following QVTo transforms a Component Diagramm in a special Class Diagramm, with an Administration class and a Monitoring-Class for each component and each port
and shows the Problem:

modeltype UML uses "http://www.eclipse.org/uml2/4.0.0/UML";

transformation kompo2administration(in Compo: UML, out decomp: UML);

property curadminclass : UML::Class = null;
property curmonitorclass : UML::Class = null;
property model : UML::Model = null;

main() 
{
    model = object Model { name='model' };
    Compo.objectsOfType(Component) -> map toAdminDecomp();
}

mapping Component::toAdminDecomp() : a: Class, m:Class
{
   object a: Class
   {
	  name := "Administation_"+self.name;
   };
   
   object m: Class
   {
   	   name := "Monitoring_"+self.name;
   };
   curadminclass := a;
   curmonitorclass := m;   
   model.ownedType += a; // Try: add to the model, but in the result,
                         // the model remain empty 
   model.ownedType += m; // this too
   self.ownedPort-> map toAdmin();
}

mapping Port::toAdmin() : a: Class, m:Class
{
   object a: Class
   {
	  name := "Administation_".concat(self.name);
   };
   
   object m: Class
   {
   	   name := "Monitoring_"+self.name;
   };
   
   var pa = object Property
   {
      name := self.name;
      aggregation := uml::AggregationKind::composite;
      type := a;
      lower := 1;
      upper := 1;
   };

   curadminclass.ownedAttribute += pa;
   
   var pm = object Property
   {
      name := self.name;
      aggregation := uml::AggregationKind::composite;
      type := a;
      lower := 1;
      upper := 1;
   };
   curmonitorclass.ownedAttribute += pm;
}

The result is:

<?xml version="1.0" encoding="UTF-8"?>
<xmi:XMI xmi:version="20110701" xmlns:xmi="http://www.omg.org/spec/XMI/20110701" xmlns:uml="http://www.eclipse.org/uml2/4.0.0/UML">
  <uml:Model xmi:id="_4LFAoFelEeOXFqUo7lQK7Q"/>
  <uml:Class xmi:id="_4LFAoVelEeOXFqUo7lQK7Q" name="Administation_ISP">
    <ownedAttribute xmi:id="_4LFAolelEeOXFqUo7lQK7Q" name="Gateway" type="_4LFAr1elEeOXFqUo7lQK7Q" aggregation="composite">
      <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_4LFAo1elEeOXFqUo7lQK7Q" value="1"/>
      <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_4LFApFelEeOXFqUo7lQK7Q" value="1"/>
    </ownedAttribute>
    <ownedAttribute xmi:id="_4LFApVelEeOXFqUo7lQK7Q" name="AccessRouter" type="_4LFAsVelEeOXFqUo7lQK7Q" aggregation="composite">
      <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_4LFAplelEeOXFqUo7lQK7Q" value="1"/>
      <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_4LFAp1elEeOXFqUo7lQK7Q" value="1"/>
    </ownedAttribute>
  </uml:Class>

you see, the generated Objekts are in the first level.
and not as I expect, the Objekts should be ownedTypes in the Model:

<xmi:XMI xmi:version="20110701" xmlns:xmi="http://www.omg.org/spec/XMI/20110701" xmlns:uml="http://www.eclipse.org/uml2/4.0.0/UML">
  <uml:Model xmi:id="_4LFAoFelEeOXFqUo7lQK7Q">
  <uml:packagedElement xmi:type="uml:Class" xmi:id="_4LFAoVelEeOXFqUo7lQK7Q" name="Administation_ISP">
    <ownedAttribute xmi:id="_4LFAolelEeOXFqUo7lQK7Q" name="Gateway" type="_4LFAr1elEeOXFqUo7lQK7Q" aggregation="composite">
      <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_4LFAo1elEeOXFqUo7lQK7Q" value="1"/>
      <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_4LFApFelEeOXFqUo7lQK7Q" value="1"/>
    </ownedAttribute>
    <ownedAttribute xmi:id="_4LFApVelEeOXFqUo7lQK7Q" name="AccessRouter" type="_4LFAsVelEeOXFqUo7lQK7Q" aggregation="composite">
      <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_4LFAplelEeOXFqUo7lQK7Q" value="1"/>
      <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_4LFAp1elEeOXFqUo7lQK7Q" value="1"/>
    </ownedAttribute>
  </uml:PackagedElement>
  <uml:Packagedlement xmi:typ="uml:Class" xmi:id="_4LFAqFelEeOXFqUo7lQK7Q" name="Monitoring_ISP">
    <ownedAttribute xmi:id="_4LFAqVelEeOXFqUo7lQK7Q" name="Gateway" type="_4LFAr1elEeOXFqUo7lQK7Q" aggregation="composite">
     </uml:PackagedElement>
   </uml:Model>

Thank you very much
Rudolf Weber, Germany

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Re: goal for new objects in a transformation [message #1215935 is a reply to message #1214821]

Thu, 28 November 2013 08:52

Matteo M.

Messages: 40
Registered: May 2012

Member

Quote:

model.ownedType += a; // Try: add to the model, but in the result,
                      // the model remain empty
model.ownedType += m; // this too

try this:

model.packagedElement += a;

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Re: goal for new objects in a transformation [message #1219434 is a reply to message #1215935]

Tue, 03 December 2013 20:36

Rudolf Weber

Messages: 11
Registered: February 2013

Junior Member

I changed it, but the effect is the same.

I added simple objects

main() 
{
    model = object Model { name='model' };
    model.packagedElement += object Class { name :='Packman'; };
    model.ownedType += object Class { name :='Type'; };

This has nothing to do with my mapping - but the effect is the same:

'model', 'Packman',and 'Type' are in the same level, and not packaged in model.

What is the problem ?

Thank you very much

Rudolf

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Re: goal for new objects in a transformation [message #1220027 is a reply to message #1219434]

Mon, 09 December 2013 08:56

Christopher Gerking

Messages: 115
Registered: April 2011

Senior Member

Your problem is that "=" is not an assignment operator. That's why in your code, the model variable remains unassigned. Consequently, it is not possible to populate your model. Instead, all created objects will be top-level.

Just try

model := object Model { name='model' };

i.e. replace '=' by ':='.

As of QVTo 3.4.0, there will be a warning message printed in this situation.

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Re: goal for new objects in a transformation [message #1222215 is a reply to message #1220027]

Thu, 19 December 2013 22:59

Rudolf Weber

Messages: 11
Registered: February 2013

Junior Member

Thank you for the answers, the answer of Christopher Gerking helped:

modeltype UML uses "http://www.eclipse.org/uml2/4.0.0/UML";

transformation kompo2administration(in Compo: UML, out decomp: UML);

property curadminclass : UML::Class = null;
property curmonitorclass : UML::Class = null;
property model : UML::Model = null;

main() 
{
    model := object Model { name='model' };
    // excercise polulating the model
    model.packagedElement += object Class { name :='Packman'; };
    model.ownedType += object Class { name :='Type'; };
    // The transformation
    Compo.objectsOfType(Component) -> map toAdminDecomp();
}

mapping Component::toAdminDecomp() : a: Class, m:Class
{
   object a: Class
   {
	  name := "Administation_"+self.name;
   };
   
   object m: Class
   {
   	   name := "Monitoring_"+self.name;
   };
   curadminclass := a;
   curmonitorclass := m;   
   model.ownedType += a;
   model.ownedType += m;
   self.ownedPort-> map toAdmin();
}

mapping Port::toAdmin() : a: Class, m:Class
{
   object a: Class
   {
	  name := "Administation_".concat(self.name);
   };
   
   object m: Class
   {
   	   name := "Monitoring_"+self.name;
   };
  
   model.ownedType += a;
   model.ownedType += m;
    
   var pa = object Property
   {
      name := self.name;
      aggregation := uml::AggregationKind::composite;
      type := a;
      lower := 1;
      upper := 1;
   };

   curadminclass.ownedAttribute += pa;
  
   
   var pm = object Property
   {
      name := self.name;
      aggregation := uml::AggregationKind::composite;
      type := a;
      lower := 1;
      upper := 1;
   };
   curmonitorclass.ownedAttribute += pm;
}

The solution was
* using := as assignment populates the model
* The created objects are added explicitly to the model.

But I still don't understand:
* is the model the output-Model which is referred in the output parameter decomp ?
* why I need the allocaton of a model ? (first line in main() in the above code)
* (Ok, I have a manual model, and I have to explicitly add the objects)

Greetings
Rudolf

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Re: goal for new objects in a transformation [message #1223208 is a reply to message #1222215]

Sun, 22 December 2013 19:32

Christopher Gerking

Messages: 115
Registered: April 2011

Senior Member

Rudolf Weber wrote on Thu, 19 December 2013 17:59

* is the model the output-Model which is referred in the output parameter decomp ?

No. I'm not familiar with the UML meta model, but it seems as if every model requires an explicit instance of class Model, maybe as a root container.

Rudolf Weber wrote on Thu, 19 December 2013 17:59

* why I need the allocaton of a model ? (first line in main() in the above code)

Because Model is just a class in your meta model, and you need an instance of this class to accommodate other model objects. As stated above, this seems to be a particularity with the UML meta model.

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Re: goal for new objects in a transformation [message #1226613 is a reply to message #1223208]

Thu, 02 January 2014 07:44

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

Model is a derivation of Package and it is conventional for the root of
UML models to be a Model rather than a Package. This provides a single
root for potentially diverse contents.

However you could have a "http://www.eclipse.org/uml2/4.0.0/UML" model
whoose root was a Comment.

As you discovered from the accidental comparison rather than assignment,
everything that lacks a parent is placed at the root.

Beware that QVTo provides a built-in Model class too. This doesn't seem
to have caused you a problem; yet.

Regards

Ed Willink

On 22/12/2013 19:32, Christopher Gerking wrote:
> Rudolf Weber wrote on Thu, 19 December 2013 17:59
>> * is the model the output-Model which is referred in the output
>> parameter decomp ?
>
>
> No. I'm not familiar with the UML meta model, but it seems as if every
> model requires an explicit instance of class Model, maybe as a root
> container.
>
> Rudolf Weber wrote on Thu, 19 December 2013 17:59
>> * why I need the allocaton of a model ? (first line in main() in the
>> above code)
>
>
> Because Model is just a class in your meta model, and you need an
> instance of this class to accommodate other model objects. As stated
> above, this seems to be a particularity with the UML meta model.
>

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