Home » Modeling » GMF (Graphical Modeling Framework) » Link Constraints For Special Target Features
| Link Constraints For Special Target Features [message #177799] |
Tue, 18 March 2008 07:56  |
Eclipse User |
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Originally posted by: martin.baus.web.de
Hi All,
sorry that I post this again, but I need a workaround and can't find one by
myself:
I have a metamodel with 'Tablecolumns' that have a reference to their
'Columntype : iDataType'.
iDataType is an abstract class which has to specializations:
DistinctType ------|> iDataType <|------ PrimitiveType
I want to draw a Link between DistinctTypes and their Tablecolumn where they
are used in. But no links to PrimitiveTypes.
So I made a LinkMapping in my mappingdef and set the TargetFeature
to 'Columntype : iDataType'.
Then I added a Target-LinkConstraint 'not oclIsKindOf(PrimitiveType)'.
If I use the Tool from the palette to draw a new Link it works, because I
can't target a primitvetype.
But if I assign a primitivetype in the propertiessheet to a tablecolumn and
reopen the editor, then the link is drawn.
How can I restrict links to primitivetypes in both situations?
Any help would be appreciated.
Thanks
Martin
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| Re: Link Constraints For Special Target Features [message #177856 is a reply to message #177799] |
Tue, 18 March 2008 15:15  |
 Boris Blajer
Messages: 217
Registered: July 2009 |
Senior Member |
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Hi Martin,
You may try using audits in the live validation mode.
Alternatively, you may add a ResourceSetListener to the transactional
editing domain and check the integrity of your model before every
transaction commit (I believe there is essentially no difference between
these approaches, except that the logic is coded in OCL or Java,
respectively).
Best regards,
Boris
Martin Baus wrote:
> Hi All,
>
> sorry that I post this again, but I need a workaround and can't find one by
> myself:
>
> I have a metamodel with 'Tablecolumns' that have a reference to their
> 'Columntype : iDataType'.
>
> iDataType is an abstract class which has to specializations:
>
> DistinctType ------|> iDataType <|------ PrimitiveType
>
> I want to draw a Link between DistinctTypes and their Tablecolumn where they
> are used in. But no links to PrimitiveTypes.
>
> So I made a LinkMapping in my mappingdef and set the TargetFeature
> to 'Columntype : iDataType'.
> Then I added a Target-LinkConstraint 'not oclIsKindOf(PrimitiveType)'.
>
> If I use the Tool from the palette to draw a new Link it works, because I
> can't target a primitvetype.
> But if I assign a primitivetype in the propertiessheet to a tablecolumn and
> reopen the editor, then the link is drawn.
>
> How can I restrict links to primitivetypes in both situations?
>
> Any help would be appreciated.
>
> Thanks
> Martin
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| Re: Link Constraints For Special Target Features [message #177919 is a reply to message #177856] |
Tue, 18 March 2008 16:54 |
| Eclipse User |
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Originally posted by: martin.baus.web.de
--nextPart1378737.A0hR4ajdoc
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8Bit
Hi Boris,
thanks for help, but I think I meant something different.
I don't want to constrain the Reference from TableColumn to PrimitiveType,
because it should be allowed to set PrimitiveType as Columntype in the
PropertiesView.
But I don't want the Link to be drawn between a TableColumn and its
ColumnType if (and only if) it's a PrimitiveType.
So any validation will not cause an error, because the semantic is alright,
only the visualization isn't.
I added an attachement for you to see how it looks right now. Because of the
definition of the linkmapping in my .map I have Links to both possible
iDataTypes. But I want to disable the ones to PrimitiveTypes like Varchar
in this case.
Thanks for your help.
----------
Martin
Boris Blajer wrote:
> Hi Martin,
>
> You may try using audits in the live validation mode.
> Alternatively, you may add a ResourceSetListener to the transactional
> editing domain and check the integrity of your model before every
> transaction commit (I believe there is essentially no difference between
> these approaches, except that the logic is coded in OCL or Java,
> respectively).
>
> Best regards,
> Boris
>
>
> Martin Baus wrote:
>> Hi All,
>>
>> sorry that I post this again, but I need a workaround and can't find one
>> by myself:
>>
>> I have a metamodel with 'Tablecolumns' that have a reference to their
>> 'Columntype : iDataType'.
>>
>> iDataType is an abstract class which has to specializations:
>>
>> DistinctType ------|> iDataType <|------ PrimitiveType
>>
>> I want to draw a Link between DistinctTypes and their Tablecolumn where
>> they are used in. But no links to PrimitiveTypes.
>>
>> So I made a LinkMapping in my mappingdef and set the TargetFeature
>> to 'Columntype : iDataType'.
>> Then I added a Target-LinkConstraint 'not oclIsKindOf(PrimitiveType)'.
>>
>> If I use the Tool from the palette to draw a new Link it works, because I
>> can't target a primitvetype.
>> But if I assign a primitivetype in the propertiessheet to a tablecolumn
>> and reopen the editor, then the link is drawn.
>>
>> How can I restrict links to primitivetypes in both situations?
>>
>> Any help would be appreciated.
>>
>> Thanks
>> Martin
--nextPart1378737.A0hR4ajdoc
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--nextPart1378737.A0hR4ajdoc--
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| Re: Link Constraints For Special Target Features [message #177927 is a reply to message #177919] |
Tue, 18 March 2008 17:25 |
Boris Blajer
Messages: 217
Registered: July 2009 |
Senior Member |
|
|
Hi Martin,
Sorry for the misunderstanding. Now I see what you mean.
You have added a creation constraint that is only checked when the link
is created. You also need the element not to be recognized as a link by
the diagram updater. This can be done by attaching a domain
specialization constraint to the link mapping in the mapping model.
Best regards,
Boris
Martin Baus wrote:
> Hi Boris,
>
> thanks for help, but I think I meant something different.
>
> I don't want to constrain the Reference from TableColumn to PrimitiveType,
> because it should be allowed to set PrimitiveType as Columntype in the
> PropertiesView.
> But I don't want the Link to be drawn between a TableColumn and its
> ColumnType if (and only if) it's a PrimitiveType.
>
> So any validation will not cause an error, because the semantic is alright,
> only the visualization isn't.
>
> I added an attachement for you to see how it looks right now. Because of the
> definition of the linkmapping in my .map I have Links to both possible
> iDataTypes. But I want to disable the ones to PrimitiveTypes like Varchar
> in this case.
>
> Thanks for your help.
>
> ----------
> Martin
>
>
> Boris Blajer wrote:
>
>> Hi Martin,
>>
>> You may try using audits in the live validation mode.
>> Alternatively, you may add a ResourceSetListener to the transactional
>> editing domain and check the integrity of your model before every
>> transaction commit (I believe there is essentially no difference between
>> these approaches, except that the logic is coded in OCL or Java,
>> respectively).
>>
>> Best regards,
>> Boris
>>
>>
>> Martin Baus wrote:
>>> Hi All,
>>>
>>> sorry that I post this again, but I need a workaround and can't find one
>>> by myself:
>>>
>>> I have a metamodel with 'Tablecolumns' that have a reference to their
>>> 'Columntype : iDataType'.
>>>
>>> iDataType is an abstract class which has to specializations:
>>>
>>> DistinctType ------|> iDataType <|------ PrimitiveType
>>>
>>> I want to draw a Link between DistinctTypes and their Tablecolumn where
>>> they are used in. But no links to PrimitiveTypes.
>>>
>>> So I made a LinkMapping in my mappingdef and set the TargetFeature
>>> to 'Columntype : iDataType'.
>>> Then I added a Target-LinkConstraint 'not oclIsKindOf(PrimitiveType)'.
>>>
>>> If I use the Tool from the palette to draw a new Link it works, because I
>>> can't target a primitvetype.
>>> But if I assign a primitivetype in the propertiessheet to a tablecolumn
>>> and reopen the editor, then the link is drawn.
>>>
>>> How can I restrict links to primitivetypes in both situations?
>>>
>>> Any help would be appreciated.
>>>
>>> Thanks
>>> Martin
>
>
> ------------------------------------------------------------ ------------
>
|
|
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| Re: Link Constraints For Special Target Features [message #178148 is a reply to message #177927] |
Mon, 17 March 2008 05:04 |
| Eclipse User |
|
|
|
Originally posted by: martin.baus.web.de
Hi Boris,
thanks for your great help!
It's now doing what I expected.
For these who have a similar problem, here is the solution:
Use in the your mapping definition under your link mapping
- a 'link constraint' for constraining the creation of the link when you use
the corresponding creation tool
- a 'constraint' for constraining the link at all to appear
In my solution I used the OCL Syntax for the 'constraint':
not self.columnType.oclIsKindOf(PrimitiveType)
And additionally I had to set ContainmentFeature and Element in the Link
Mapping. But that was easy.
-----------
Martin
Boris Blajer wrote:
> Hi Martin,
>
> Sorry for the misunderstanding. Now I see what you mean.
>
> You have added a creation constraint that is only checked when the link
> is created. You also need the element not to be recognized as a link by
> the diagram updater. This can be done by attaching a domain
> specialization constraint to the link mapping in the mapping model.
>
> Best regards,
> Boris
>
> Martin Baus wrote:
>> Hi Boris,
>>
>> thanks for help, but I think I meant something different.
>>
>> I don't want to constrain the Reference from TableColumn to
>> PrimitiveType, because it should be allowed to set PrimitiveType as
>> Columntype in the PropertiesView.
>> But I don't want the Link to be drawn between a TableColumn and its
>> ColumnType if (and only if) it's a PrimitiveType.
>>
>> So any validation will not cause an error, because the semantic is
>> alright, only the visualization isn't.
>>
>> I added an attachement for you to see how it looks right now. Because of
>> the definition of the linkmapping in my .map I have Links to both
>> possible iDataTypes. But I want to disable the ones to PrimitiveTypes
>> like Varchar in this case.
>>
>> Thanks for your help.
>>
>> ----------
>> Martin
>>
>>
>> Boris Blajer wrote:
>>
>>> Hi Martin,
>>>
>>> You may try using audits in the live validation mode.
>>> Alternatively, you may add a ResourceSetListener to the transactional
>>> editing domain and check the integrity of your model before every
>>> transaction commit (I believe there is essentially no difference between
>>> these approaches, except that the logic is coded in OCL or Java,
>>> respectively).
>>>
>>> Best regards,
>>> Boris
>>>
>>>
>>> Martin Baus wrote:
>>>> Hi All,
>>>>
>>>> sorry that I post this again, but I need a workaround and can't find
>>>> one by myself:
>>>>
>>>> I have a metamodel with 'Tablecolumns' that have a reference to their
>>>> 'Columntype : iDataType'.
>>>>
>>>> iDataType is an abstract class which has to specializations:
>>>>
>>>> DistinctType ------|> iDataType <|------ PrimitiveType
>>>>
>>>> I want to draw a Link between DistinctTypes and their Tablecolumn where
>>>> they are used in. But no links to PrimitiveTypes.
>>>>
>>>> So I made a LinkMapping in my mappingdef and set the TargetFeature
>>>> to 'Columntype : iDataType'.
>>>> Then I added a Target-LinkConstraint 'not oclIsKindOf(PrimitiveType)'.
>>>>
>>>> If I use the Tool from the palette to draw a new Link it works, because
>>>> I can't target a primitvetype.
>>>> But if I assign a primitivetype in the propertiessheet to a tablecolumn
>>>> and reopen the editor, then the link is drawn.
>>>>
>>>> How can I restrict links to primitivetypes in both situations?
>>>>
>>>> Any help would be appreciated.
>>>>
>>>> Thanks
>>>> Martin
>>
>>
>> ------------------------------------------------------------ ------------
>>
|
|
|
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