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EMF metmodel [message #1754727]

Tue, 21 February 2017 19:37

taghreed altamimi

Messages: 184
Registered: October 2014

Senior Member

Hi,
This my first time using EMF language can you please help me .
@namespace(uri="mapping", prefix="mapping")
package mapping;

class mapping {
val sourceType[+]#hasSource contents;

}
class sourceType{
attr String Sname;
ref targetType[+] hasTargets;
ref mapping[1]#contents hasSource;

}
class targetType{
attr String Tname;

i have started creating the metamodel step by step not all at once but i am facing problem between the class sourceType and class targetType when i tried to create an instance from that metamodel ,what i mean by the relation between them that source has many targets .
Can you please help me.

Taghreed.

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Re: EMF metmodel [message #1754736 is a reply to message #1754727]

Tue, 21 February 2017 20:38

Dimitris Kolovos

Messages: 2163
Registered: July 2009
Location: York, UK

Senior Member

Hi Taghreed,

I'm not sure I fully understand the problem you're reporting. Could you please elaborate a bit more?

Cheers,
Dimitris

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Re: EMF metmodel [message #1754738 is a reply to message #1754736]

Tue, 21 February 2017 21:08

taghreed altamimi

Messages: 184
Registered: October 2014

Senior Member

Hi Dimitris,
i created the metamodel then i tried to create an instance from that metamodel i have chosen mapping as a root element then added sourceType as child ,i think i have something wrong with the relations .I attached screenshot for what i have.

Thanks
Taghreed,

Attachment: mapping.png
(Size: 118.69KB, Downloaded 143 times)

[Updated on: Tue, 21 February 2017 21:08]

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Re: EMF metmodel [message #1754745 is a reply to message #1754738]

Tue, 21 February 2017 22:02

Dimitris Kolovos

Messages: 2163
Registered: July 2009
Location: York, UK

Senior Member

What does the Problems view say?

Cheers,
Dimitris

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Re: EMF metmodel [message #1754746 is a reply to message #1754745]

Tue, 21 February 2017 22:26

taghreed altamimi

Messages: 184
Registered: October 2014

Senior Member

I changed the code to be like this
@namespace(uri="mapping", prefix="")
package mapping;

class mapping {
val sourceType[+] #sources sourceType;
val targetType[+] #targets targetType ;
}
class sourceType{
attr String Sname;
val targetType[+] #hasSource targetType;
ref mapping[1]#sourceType sources;
}
class targetType{
attr String Tname;
ref sourceType[1]#targetType hasSource;
ref mapping[1]#targetType targets;

i got warning on the bold lines says that:
A containment reference of a type with a container feature org.eclipse.emf.ecore.impl.EReferenceImpl@23199524{platform:/resource/evolving%20Source%20Model/mapping.emf#//targetType/targets} that requires instances to be contained elsewhere cannot be populated

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Re: EMF metmodel [message #1754748 is a reply to message #1754746]

Tue, 21 February 2017 22:31

Dimitris Kolovos

Messages: 2163
Registered: July 2009
Location: York, UK

Senior Member

Hi Taghreed,

val targetType[+] #hasSource targetType;

should be

ref targetType[+] #hasSource targetType;

instead.

Cheers,
Dimitris

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Re: EMF metmodel [message #1754750 is a reply to message #1754748]

Tue, 21 February 2017 23:14

taghreed altamimi

Messages: 184
Registered: October 2014

Senior Member

Hi Dimitris,
That correction removed the warning but when i created the instance model i had to add sourceType as a child and then add targetType as a child then set the feature target type manually by choosing the target type that i want to match it with sourceType .
How can i make sourceType a container for targetType and each sourceType has a relation targetType with targetType

Thanks,
Taghreed

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Re: EMF metmodel [message #1754751 is a reply to message #1754750]

Tue, 21 February 2017 23:40

Dimitris Kolovos

Messages: 2163
Registered: July 2009
Location: York, UK

Senior Member

Hi Taghreed,

If you turn SourceType.targetType to a containment reference (val) then each target type can only be connected to one SourceType. Does this sound like what you're after?

On a related note, it's common for class names to start with an upper case letter (i.e. SourceType instead of sourceType) to avoid naming conflicts with references/attributes.

Cheers,
Dimitris

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Re: EMF metmodel [message #1754820 is a reply to message #1754751]

Wed, 22 February 2017 18:30

taghreed altamimi

Messages: 184
Registered: October 2014

Senior Member

Hi Dimitris,

Thanks.
Taghreed

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