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how to create programatically an instance of given DataType in UML [message #1073724]

Thu, 25 July 2013 11:27

hongyu liu

Messages: 6
Registered: March 2012

Junior Member

Need:

Given a UML self-defined DataType, not UML pre-defined DataType (e.g. MyType), how to create its instance programatically?

Use case:

In a UML profile, we define a stereotype which has some attributes of MyType. In order to specify a UML model correctly, we need to create an instance of MyType after we apply the stereotype.

Current Papyrus UI Capability

In the "applied stereotype view", we can select the stereotype and a panel to create those instance is ready on the right side. It needs only to click "+" to open a dialog and initialize an instance. How this is done by code ?

Example Pseudo Code:

Element target;
Stereotype st = getStereotypeByName("name");
target.applyStereotype(st);

DataType dt = getDataTypeByName("MyType");

EObject instance = createInstance(dt);

target.setValue(st, "myTypeAttr", instance);

Question:

How this method "EObject createInstance(DataType dt)" can be implemented ?

Thanks in advance.

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Re: how to create programatically an instance of given DataType in UML [message #1073729 is a reply to message #1073724]

Thu, 25 July 2013 11:44

Simon Schwichtenberg

Messages: 127
Registered: September 2011

Senior Member

UMLFactory.eINSTANCE.createDataType();

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Re: how to create programatically an instance of given DataType in UML [message #1073738 is a reply to message #1073729]

Thu, 25 July 2013 12:01

hongyu liu

Messages: 6
Registered: March 2012

Junior Member

In fact, your response is to create a DataType, while the question is for "create an instance of given DataType". Do you have some ideas ?

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Re: how to create programatically an instance of given DataType in UML [message #1073776 is a reply to message #1073738]

Thu, 25 July 2013 13:13

Simon Schwichtenberg

Messages: 127
Registered: September 2011

Senior Member

If I understand correctly you have a stereotype with a tagged value of type MyDataType. I am not sure if it is possible at all to create an instance of MyDataType. Is it possible to move the MyDataType's attributes (assuming they are primitive datatypes or enumerations) to the stereotype directly? That would be much easier.

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Re: how to create programatically an instance of given DataType in UML [message #1073830 is a reply to message #1073776]

Thu, 25 July 2013 15:08

Camille Letavernier

Messages: 952
Registered: February 2011

Senior Member

Hi,

You can instantiate the definition of the DataType, which is an Ecore EClass.

To retrieve the definition:

Profile p = ...;
DataType dt = ...;
EClass datatypeDefinition = (EClass)p.getDefinition(dt);
EObject datatypeInstance = datatypeDefinition.getEPackage().getEFactoryInstance().create(datatypeDefinition);

It is however much simpler to use static profiles and generate the Java API. Then this snippet becomes:

MyType = MyProfileFactory.eINSTANCE.createMyType();

Regards,
Camille

Camille Letavernier

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Re: how to create programatically an instance of given DataType in UML [message #1077200 is a reply to message #1073830]

Thu, 01 August 2013 11:08

hongyu liu

Messages: 6
Registered: March 2012

Junior Member

Thanks a lot.

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