Eclipse Community Forums: EMF "Technology" (Ecore Tools, EMFatic, etc)

Help

Home

Home » Modeling » EMF "Technology" (Ecore Tools, EMFatic, etc) » bi Directional Cross-Document Reference

Show: Today's Messages :: Show Polls :: Message Navigator

bi Directional Cross-Document Reference [message #1067339]

Mon, 08 July 2013 10:57

serhat gezgin

Messages: 243
Registered: January 2013
Location: Izmir

Senior Member

Hi all,

is it possible biDirectional cross-document referance ?

I m searching but cant find any sample.

Regards

[Updated on: Mon, 08 July 2013 11:00]

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1067343 is a reply to message #1067339]

Mon, 08 July 2013 11:20

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

Yes, it's possible. Just try it.

On 08/07/2013 12:57 PM, serhat gezgin wrote:
> Hi all,
>
> is it possible biDirectional cross-document referance ?
>
> I m searching but cant find any sample.
>
> Regards

Ed Merks
Professional Support: https://www.macromodeling.com/

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1067346 is a reply to message #1067343]

Mon, 08 July 2013 11:31

serhat gezgin

Messages: 243
Registered: January 2013
Location: Izmir

Senior Member

But i have a.ecore on project A and

b.ecore on project B so if i done cross Document Referance java projects give me a error like ;

"A cycle was detected in the built path......" reference plug-in error.

So i cant use each metamodels Model codes. How can i solve this (i make dsl for each ecore files. so project must be seperate (XTEXT))

Regards

[Updated on: Mon, 08 July 2013 11:32]

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1067363 is a reply to message #1067346]

Mon, 08 July 2013 12:14

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

Serhat,

Comments below.

On 08/07/2013 1:31 PM, serhat gezgin wrote:
> But i have a.ecore on project A and
>
> b.ecore on project B so if i done cross Document Referance java
> projects give me a error like ;
>
> "A cycle was detected in the built path......" reference plug-in error.
>
> How can i solve this (i make dsl for each ecore files. so project must
> be seperate (XTEXT))
They can't be in separate projects if those projects need to be mutually
dependent; dependencies must form a DAG. That's true even for Java
code you write yourself.
>
> Regards

Ed Merks
Professional Support: https://www.macromodeling.com/

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1067376 is a reply to message #1067346]

Mon, 08 July 2013 13:06

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

You can break the cycle by making the looped reference to a common
abstract type.

Regards

Ed Willink

On 08/07/2013 12:31, serhat gezgin wrote:
> But i have a.ecore on project A and
>
> b.ecore on project B so if i done cross Document Referance java
> projects give me a error like ;
>
> "A cycle was detected in the built path......" reference plug-in error.
>
> How can i solve this (i make dsl for each ecore files. so project must
> be seperate (XTEXT))
>
> Regards

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1067381 is a reply to message #1067376]

Mon, 08 July 2013 13:16

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

Then the types of the references would be of some unhelpful type and
there would be all the overhead of a third model. Of course all this
begs the question of why there are two models when they're
interdependent anyway...

On 08/07/2013 3:06 PM, Ed Willink wrote:
> Hi
>
> You can break the cycle by making the looped reference to a common
> abstract type.
>
> Regards
>
> Ed Willink
>
> On 08/07/2013 12:31, serhat gezgin wrote:
>> But i have a.ecore on project A and
>>
>> b.ecore on project B so if i done cross Document Referance java
>> projects give me a error like ;
>>
>> "A cycle was detected in the built path......" reference plug-in error.
>>
>> How can i solve this (i make dsl for each ecore files. so project
>> must be seperate (XTEXT))
>>
>> Regards
>

Ed Merks
Professional Support: https://www.macromodeling.com/

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1067400 is a reply to message #1067381]

Mon, 08 July 2013 14:13

serhat gezgin

Messages: 243
Registered: January 2013
Location: Izmir

Senior Member

Hi,

i dont undestand. How can i break the cycle by making the looped reference to a common

abstract type ?

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1067411 is a reply to message #1067400]

Mon, 08 July 2013 14:35

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

I assume he means that you could define another model with classes A and
B with a bidirectional reference between them and then you've you second
and third model respective classes inherit from A and B. It seems like
an ugly solution and in the end, the references are no longer typed
according to the types in the two models you already have. So the
questions remains: 1) why do you need two separate models? 2) and if
you really do, why aren't they truly separate but rather mutually dependant?

On 08/07/2013 4:13 PM, serhat gezgin wrote:
> Hi,
>
> i dont undestand. How can i break the cycle by making the looped
> reference to a common
> abstract type ?
>
>

Ed Merks
Professional Support: https://www.macromodeling.com/

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1067446 is a reply to message #1067411]

Mon, 08 July 2013 18:22

serhat gezgin

Messages: 243
Registered: January 2013
Location: Izmir

Senior Member

Hi,

i need 2 dsl for my meta-model because i have 2 veawpoint of my metamodel. If i don't seperate this metamodel to viewPoints my dsl(xtext) became useless because dsl program file become not readable cause of being too long.

and i think on a xtext project i can only generate one dsl.

so i am confused

[Updated on: Mon, 08 July 2013 18:26]

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1067455 is a reply to message #1067446]

Mon, 08 July 2013 19:10

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

Serhat,

Best you asked clear direct questions on the Xtext newsgroup. E.g., can
I have more than one grammar for just one Ecore model? My impression is
that you can define any number of grammars for a single model, but only
if you don't expect Xtext to generate the model from the grammar, but
best you ask direct questions like that where the questions below.

On 08/07/2013 8:22 PM, serhat gezgin wrote:
> Hi,
>
> i need 2 dsl for my meta-model because i have 2 veawpoint of my
> metamodel if i dont seperate this viewPoints my dsl(xtext) became
> useless because dsl program file become not readable cause of being
> too long
>
> and i think on xtext project i can only generate one dsl.
>
> so i am confused
>
>

Ed Merks
Professional Support: https://www.macromodeling.com/

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1078567 is a reply to message #1067455]

Sat, 03 August 2013 07:04

Arshad Adavani

Messages: 163
Registered: July 2013
Location: Bangalore

Senior Member

Hi,
I am using .xcore file as meta model for my grammar, which looks something like this,

class Sample{
Integer bit
....
.....
....
}

And my grammar:
Sample:
'Sample'....
....

('BIT' | 'BYTE') bit=INT

This "bit=INT" I am referring from my xcore model.
MY PROBLEM IS THAT I WANT TO EITHER TYPE "BIT AND THEN BIT VALUE" OR "BYTE AND THEN BYTE VALUE" IN MY LANGUAGE.
BUT WHEN I WRITE "BYTE AND BYTE VALUE" , I AM CONVERTING BITS INTO BYTES AND THEN STORING IT IN SAME METAMODEL FIELD "bit".
SO LATER WHEN I READ THE "RESOURCE" I WILL GET THE BIT VALUE BUT I AM UNAWARE WHETHER IT IS "BIT OR BYTE"...
"I DON'T WANT TO STORE ONE MORE VARIABLE FOR BYTE IN XCORE".
CAN ANYONE HELP ME OUT WITH THIS PROBLEM ? OR ANY BETTER SUGGESTIONS FOR THIS ??
Thanks in advance ! Smile

Arshad

Report message to a moderator

Re: bidirectional Cross-Document Reference [message #1078611 is a reply to message #1078567]

Sat, 03 August 2013 08:34

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

Arshad,

Comments below.

On 03/08/2013 9:04 AM, Arshad Adavani wrote:
> Hi,
> I am using .xcore file as meta model for my grammar, which looks
> something like this,
>
> class Sample{
> Integer bit
> ...
> ....
> ...
> }
>
> And my grammar:
> Sample:
> 'Sample'....
> ...
>
> ('BIT' | 'BYTE') bit=INT
> This "bit=INT" I am referring from my xcore model.
> MY PROBLEM IS THAT I WANT TO EITHER TYPE "BIT AND THEN BIT VALUE" OR
> "BYTE AND THEN BYTE VALUE" IN MY LANGUAGE.
> BUT WHEN I WRITE "BYTE AND BYTE VALUE" , I AM CONVERTING BITS INTO
> BYTES AND THEN STORING IT IN SAME METAMODEL FIELD "bit".
> SO LATER WHEN I READ THE "RESOURCE" I WILL GET THE BIT VALUE BUT I AM
> UNAWARE WHETHER IT IS "BIT OR BYTE"...
> "I DON'T WANT TO STORE ONE MORE VARIABLE FOR BYTE IN XCORE".
> CAN ANYONE HELP ME OUT WITH THIS PROBLEM ? OR ANY BETTER SUGGESTIONS
> FOR THIS ??
If I understand correctly, your model has no way to record or to know
whether you've represented the value in the grammar as bit or byte. So,
given just an instance of a Sample with a field of type Integer (why not
use int?) you'd have no way to know how that should be serialized
according to your grammar as either a BIT or a BYTE. You need something
else in your model to record such information, e.g., a boolean field or
an enum field for recording the BIT verses BYTE keyword.
> Thanks in advance ! :)

Ed Merks
Professional Support: https://www.macromodeling.com/

Report message to a moderator

Previous Topic:	TENEO COLUMN NAME GENERATION
Next Topic:	Ecore Tools and Xcore Problem and Synchronization

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Fri Apr 19 11:55:45 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter