[
http://issues.ops4j.org/browse/QI-330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13951#action_13951
]
Niclas Hedhman commented on QI-330:
-----------------------------------
They are used outside Qi4j.
GutFeeling(tm) also tells me that there are more complex cases;
- Subtype must be oneOf....
- Don't allow these types to reside in Application Layer.
(I like constraints, like "You are not allowed to buy guns", to save me from
myself ;-) )
> Constraining subtypes
> ---------------------
>
> Key: QI-330
> URL: http://issues.ops4j.org/browse/QI-330
> Project: Qi4j
> Issue Type: Improvement
> Reporter: Niclas Hedhman
>
> I have a usecase where a supertype of a composite can not declare being a
> Value Composite, but all subtypes of it MUST be value composites. It is an
> assumption in the design.
> It would be cool to be able to put a Type Constraint on a super type, of what
> the sub types of it must adhere to. For instance,
> {code}
> @MustBeValueComposite
> public interface DomainEvent
> {}
> @TypeConstraints( MustBeValueCompositeContraint.class )
> public @interface MustBeValueComposite
> {}
> public class MustBeValueCompositeConstraint extends TypeConstraint
> {
> public boolean isValid( Class subType, Module creationIn )
> {
> return subType instanceof ValueComposite;
> }
> }
> {code}
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://issues.ops4j.org/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
_______________________________________________
qi4j-dev mailing list
[email protected]
http://lists.ops4j.org/mailman/listinfo/qi4j-dev
