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LinkMap constraint not get evaluated at runtime [message #62781]

Sun, 15 October 2006 12:58

Eclipse User

Originally posted by: greenl.mot.com

I found my LinkMap constraint (C1) was not evaluated at runtime, while my
Source End Constraint (C2) and Target End Constraint (C3) did get evaluated.

I searched the code and found the expression of C1 was copied to a generated
file named XXXVisualIDRegistry.java while C2 and C3 was copied to a
generated file named XXXBaseItemSemanticEditPolicy.java. I wonder why there
are this sort of difference and hope you guys can give me some hints.

Thanks,
Green

Re: LinkMap constraint not get evaluated at runtime [message #62861 is a reply to message #62781]

Mon, 16 October 2006 03:34

Eclipse User

Hi Green,

LinkMapping constraint is a constraint that allows one to differentiate
between several element types which are bound to the same domain model
EClass. E.g., in the MindMap example, there are three links bound to the
domain EClass Relationship, but their visual aspects are different based on
the value of the feature Relationship::type.

These constraints are rarely, if at all, evaluated at creation time, but are
evaluated by, e.g., XXXCanonicalEditPolicy to find out which element (or
element with which visualID) to create when an underlying model element is
created.

In contrast, LinkConstraints element and its direct children, Source End
Constraint and Target End Constraint are creation constraints. They are used
at creation time to disable creation of links if a link violates any of the
given constraints.

Best regards,
Boris

"Green Law" <greenl@mot.com> wrote in message
news:egtpcc$395$1@utils.eclipse.org...
>I found my LinkMap constraint (C1) was not evaluated at runtime, while my
>Source End Constraint (C2) and Target End Constraint (C3) did get
>evaluated.
>
> I searched the code and found the expression of C1 was copied to a
> generated file named XXXVisualIDRegistry.java while C2 and C3 was copied
> to a generated file named XXXBaseItemSemanticEditPolicy.java. I wonder why
> there are this sort of difference and hope you guys can give me some
> hints.
>
> Thanks,
> Green
>

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