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uml2 genmodel, abstract classes and operations [message #476357]

Wed, 10 October 2007 14:28

Javi

Messages: 23
Registered: July 2009

Junior Member

Hello,

When a class implements an interface and the operations package
is turned on, I found that the operations class is created for the
interface instead of for the concrete class.

Thank you.

This is the situation in depth:

I have a model in UML like this:
- Interface A
- op()
- Class B implements A

When I create a genmodel from it, I get an ecore like this:
- Class A (abstract)
- op()
- Class B extends A

When I generate model code with an (operations package) I get:
ImplPackage
- Class BImpl
- op() {OperationsPackage.AOperations.op(this)}

OperationsPackage
- Class AOperations
- op() {throw new UnsupportedOperationException();}

I expected:
ImplPackage
- Class BImpl
- op() {OperationsPackage.BOperations.op(this)}

OperationsPackage
- Class BOperations
- op() {throw new UnsupportedOperationException();}

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Re: uml2 genmodel, abstract classes and operations [message #476361 is a reply to message #476357]

Thu, 11 October 2007 03:27

james bruck

Messages: 1724
Registered: July 2009

Senior Member

Hi Javi,

When you say "Class B implements A" are you creating an interface
realization or a generalization to from ClassB to Interface A?
If I create a class B, interface A, and an interface realization, I get the
expected results.

Please post your model so I can have a more careful look at the issue.

- James.

"Javi" <jfbriones_tech@yahoo.es> wrote in message
news:c6bf52b356920058f94cc80aaef7985a$1@www.eclipse.org...
> Hello,
>
> When a class implements an interface and the operations package
> is turned on, I found that the operations class is created for the
> interface instead of for the concrete class.
>
> Thank you.
>
> This is the situation in depth:
>
> I have a model in UML like this:
> - Interface A
> - op()
> - Class B implements A
>
> When I create a genmodel from it, I get an ecore like this:
> - Class A (abstract)
> - op()
> - Class B extends A
>
> When I generate model code with an (operations package) I get:
> ImplPackage
> - Class BImpl
> - op() {OperationsPackage.AOperations.op(this)}
>
> OperationsPackage
> - Class AOperations
> - op() {throw new UnsupportedOperationException();}
>
> I expected:
> ImplPackage
> - Class BImpl
> - op() {OperationsPackage.BOperations.op(this)}
>
> OperationsPackage
> - Class BOperations
> - op() {throw new UnsupportedOperationException();}
>
>

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Re: uml2 genmodel, abstract classes and operations [message #476382 is a reply to message #476361]

Thu, 11 October 2007 08:56

Javi

Messages: 23
Registered: July 2009

Junior Member

Hi James,

I meant Interface Realization, but I do not get the expected results.
I reproduce here a basic uml model for testing.
Create the genmodel and set Pkg."Operations Package" = Pkg.operations
Generate the code.

Thank you.

<?xml version="1.0" encoding="UTF-8"?>
<uml:Model xmi:version="2.1"
xmlns:xmi="http://schema.omg.org/spec/XMI/2.1"
xmlns:uml="http://www.eclipse.org/uml2/2.1.0/UML"
xmi:id="_0WJsIHfVEdyEboBJ9-54sA" name="Pkg">
<packagedElement xmi:type="uml:Class" xmi:id="_3WFA8HfVEdyEboBJ9-54sA"
name="B" clientDependency="_9EWLUHfVEdyEboBJ9-54sA">
<interfaceRealization xmi:id="_9EWLUHfVEdyEboBJ9-54sA" name="ir"
supplier="_4tZZMHfVEdyEboBJ9-54sA" client="_3WFA8HfVEdyEboBJ9-54sA"
contract="_4tZZMHfVEdyEboBJ9-54sA"/>
</packagedElement>
<packagedElement xmi:type="uml:Interface"
xmi:id="_4tZZMHfVEdyEboBJ9-54sA" name="A">
<ownedOperation xmi:id="_7fK9QHfVEdyEboBJ9-54sA" name="op"/>
</packagedElement>
</uml:Model>

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Re: uml2 genmodel, abstract classes and operations [message #476386 is a reply to message #476357]

Thu, 11 October 2007 12:53

Kenn Hussey

Messages: 1620
Registered: July 2009

Senior Member

Javi,

This by design. The names of the operations classes are generated based on
the names of the classes/interfaces in which the operations are defined. One
of the reasons for introducing the concept of an operations class was to
reduce the number of redundant implementations of the same operation in
cases where the class/interface containing the operation is mixed into
(multiply inherited/realized) by more than one class...

Kenn

"Javi" <jfbriones_tech@yahoo.es> wrote in message
news:c6bf52b356920058f94cc80aaef7985a$1@www.eclipse.org...
> Hello,
>
> When a class implements an interface and the operations package
> is turned on, I found that the operations class is created for the
> interface instead of for the concrete class.
>
> Thank you.
>
> This is the situation in depth:
>
> I have a model in UML like this:
> - Interface A
> - op()
> - Class B implements A
>
> When I create a genmodel from it, I get an ecore like this:
> - Class A (abstract)
> - op()
> - Class B extends A
>
> When I generate model code with an (operations package) I get:
> ImplPackage
> - Class BImpl
> - op() {OperationsPackage.AOperations.op(this)}
>
> OperationsPackage
> - Class AOperations
> - op() {throw new UnsupportedOperationException();}
>
> I expected:
> ImplPackage
> - Class BImpl
> - op() {OperationsPackage.BOperations.op(this)}
>
> OperationsPackage
> - Class BOperations
> - op() {throw new UnsupportedOperationException();}
>
>

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Re: uml2 genmodel, abstract classes and operations [message #476387 is a reply to message #476386]

Thu, 11 October 2007 13:47

Javi

Messages: 23
Registered: July 2009

Junior Member

Thank you Kenn,

Now I understand it, and it is a good reason to avoid the redundancy of
method implementations.

I suppose there is no variable in the genmodel file to change this
behavior.
It would be really nice to have it in order the uml2.codegen could be
reused by more people.

At first sight I cannot make it by changing only the templates. I seems
that the names are created in the genmodel.

Could you please confirm me this point.

Javi

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Re: uml2 genmodel, abstract classes and operations [message #476396 is a reply to message #476387]

Wed, 17 October 2007 13:33

Kenn Hussey

Messages: 1620
Registered: July 2009

Senior Member

Javi,

Yes, the names are calculated in the generator model based on the class
(interface) names. I'm not sure that I understand how/why you need the
behavior to be different, but if you can justify this as something that
would be generally useful, feel free to open an enhancement request in
Bugzilla.

Kenn

"Javi" <jfbriones_tech@yahoo.es> wrote in message
news:c02364e7f23320f9ccb40fffade84c8a$1@www.eclipse.org...
> Thank you Kenn,
>
> Now I understand it, and it is a good reason to avoid the redundancy of
> method implementations.
>
> I suppose there is no variable in the genmodel file to change this
> behavior.
> It would be really nice to have it in order the uml2.codegen could be
> reused by more people.
>
> At first sight I cannot make it by changing only the templates. I seems
> that the names are created in the genmodel.
>
> Could you please confirm me this point.
>
> Javi
>
>

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