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PrimitiveTypes For Metamodel [message #1162163]

Wed, 30 October 2013 03:40

Eclipse User

Hi all,

I need to create primitive types for my metamodel. When user create ScalarProperty

type must be one of Int32 or Binary. But i dont want to create Instance of Int32 or

Binary. I just need to ref this class so

How can i do this ?

my metamodel;

class ScalarProperty extends SingleProperty {
  attr String defaultValue;
  ref  EDataType[1] type;
}

class Type {
}

class Int32 extends Type{
}

class Binary extends Type {
}

...

Regards

Re: PrimitiveTypes For Metamodel [message #1162437 is a reply to message #1162163]

Wed, 30 October 2013 07:21

Eclipse User

Serhat,

Comments below.

On 30/10/2013 8:40 AM, serhat gezgin wrote:
> Hi all,
>
> I need to create primitive types for my metamodel.
Or you mean more like built-in types?
> When user create ScalarProperty
> type must be one of Int32 or Binary. But i dont want to create
> Instance of Int32 or
> Binary.
So you likely need some type of "library" resource that contains your
definitions of such things and that resource should be packaged in your
bundle so it can be referenced by other model instances.
> I just need to ref this class so
> How can i do this ?
You can look at how Ecore makes things like EString available. Or at
how Xcore's org.eclipse.emf.xcore.lib provides library files, in this
case to define built-in annotation declarations...
>
> my metamodel;
>
>
> class ScalarProperty extends SingleProperty {
> attr String defaultValue;
> ref EDataType[1] type;
> }
>
> class Type {
> }
>
> class Int32 extends Type{
> }
>
> class Binary extends Type {
> }
>
> ..
>
>
> Regards

Re: PrimitiveTypes For Metamodel [message #1162898 is a reply to message #1162437]

Wed, 30 October 2013 13:54

Eclipse User

Hi Ed,

Yes i mean built-in types Smile

i look to ecore.ecore but don't understand. They do this with datatypes ?


@Ecore(constraints="WellFormedInstanceTypeName UniqueTypeParameterNames")
abstract class EClassifier extends ENamedElement {
  op EBoolean isInstance(EJavaObject object);
  op EInt getClassifierID();

  @GenModel(suppressedIsSetVisibility="true", suppressedUnsetVisibility="true")
  volatile unsettable attr EString instanceClassName;
  readonly volatile transient derived attr EJavaClass<?> instanceClass;
  readonly volatile transient derived attr EJavaObject defaultValue;

  @GenModel(suppressedIsSetVisibility="true", suppressedUnsetVisibility="true")
  volatile unsettable attr EString instanceTypeName;
  readonly transient ref EPackage#eClassifiers ePackage;
  val ETypeParameter[*] eTypeParameters;
}

class EDataType extends EClassifier {
  attr EBoolean serializable = "true";
}

@ExtendedMetaData(baseType="http://www.w3.org/2001/XMLSchema#short")
datatype EShort : short;

@ExtendedMetaData(baseType="EShort", name="EShort:Object")
datatype EShortObject : java.lang.Short;

@ExtendedMetaData(baseType="http://www.w3.org/2001/XMLSchema#string")
datatype EString : java.lang.String;

...

i dont understand where is the resource of types ?

Regards

Re: PrimitiveTypes For Metamodel [message #1163911 is a reply to message #1162898]

Thu, 31 October 2013 05:54

Eclipse User

Serhat,

Things like platform:/plugin/org.eclipse.emf.ecore/model/Ecore.ecore can
be used to load the resource contained in that plugin/bundle. So you can
always define instance of any model, and keep them in your plugin and
ensure (via the build.properties) that the end up on the classpath of
the binary bundle and then they'll be available for any other model that
needs them.

On 30/10/2013 6:54 PM, serhat gezgin wrote:
> Hi Ed,
>
> Yes i mean built-in types :)
>
> i look to ecore.ecore but don't understand. They do this with datatypes ?
>
>
>
> @Ecore(constraints="WellFormedInstanceTypeName UniqueTypeParameterNames")
> abstract class EClassifier extends ENamedElement {
> op EBoolean isInstance(EJavaObject object);
> op EInt getClassifierID();
>
> @GenModel(suppressedIsSetVisibility="true",
> suppressedUnsetVisibility="true")
> volatile unsettable attr EString instanceClassName;
> readonly volatile transient derived attr EJavaClass<?> instanceClass;
> readonly volatile transient derived attr EJavaObject defaultValue;
>
> @GenModel(suppressedIsSetVisibility="true",
> suppressedUnsetVisibility="true")
> volatile unsettable attr EString instanceTypeName;
> readonly transient ref EPackage#eClassifiers ePackage;
> val ETypeParameter[*] eTypeParameters;
> }
>
> class EDataType extends EClassifier {
> attr EBoolean serializable = "true";
> }
>
> @ExtendedMetaData(baseType="http://www.w3.org/2001/XMLSchema#short")
> datatype EShort : short;
>
> @ExtendedMetaData(baseType="EShort", name="EShort:Object")
> datatype EShortObject : java.lang.Short;
>
> @ExtendedMetaData(baseType="http://www.w3.org/2001/XMLSchema#string")
> datatype EString : java.lang.String;
>
> ..
>
>
>
> i dont understand where is the resource of types ?
>
> Regards

Re: PrimitiveTypes For Metamodel [message #1167304 is a reply to message #1163911]

Sat, 02 November 2013 11:07

Eclipse User

Hi Ed,

If i understand correctly, i must create MyMeta.ecore

than i must create insteance from this model MyMeta.xmi (Because .ecore file include my Type Clasees) and create insteance of types

after that i must load MyMeta.xmi to MyMeta.ecore ?

Am i right ? is this the correct way ?

or do i completely wrong Embarrassed

?

Regards

Re: PrimitiveTypes For Metamodel [message #1167446 is a reply to message #1167304]

Sat, 02 November 2013 13:23

Eclipse User

Serhat,

No, the point is you can store any resource in your bundle itself and
access it using
platform:/plugin/<plugin-id>/<path-to-resource>/<resource-name> and you
can load that into any resource set. So you can store "static
instances" of any model. Ecore.ecore is just an example. There's also
Ecore.genmodel in there. So just store your MyMeta.xmi with your
"library" instance.

On 02/11/2013 4:07 PM, serhat gezgin wrote:
> Hi Ed,
>
> If i understand correctly, i must create MyMeta.ecore
>
> than i must create insteance from this model MyMeta.xmi (Because
> .ecore file include my Type Clasees) and create insteance of types
>
> after that i must load MyMeta.xmi to MyMeta.ecore ?
>
> Am i right ? is this the correct way ?
>
> or do i completely wrong :blush: ?
>
> Regards

Re: PrimitiveTypes For Metamodel [message #1168641 is a reply to message #1167446]

Sun, 03 November 2013 07:58

Eclipse User

Hi Ed,

Finally I solved the problem with your suggestions Smile

Regards

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