[cdi-dev] [JBoss JIRA] (CDI-277) Clarify inheritance behavior of observer methods

Sat Oct 13 15:14:01 EDT 2012

    [ https://issues.jboss.org/browse/CDI-277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12726225#comment-12726225 ] 

Mark Struberg commented on CDI-277:
-----------------------------------

Y extends X
X will be scanned and a Bean<X> will be created for it
Y will be scanned and a Bean<Y> will be created for it

If Y @Specializes extends X then Bean<X> is disabled.
But Y still inherits all the methods of X.
Assume X has a method doSomething(@Observes SomeEvent e) {..
Then this method is also part of any instance of type Y. 

We are perfectly d' accord that there will be no contextual instance created for Bean<X> ever. But imo it's not clear what should happen with the methods which get inherited by any contextual instance for Bean<Y>. At least it's not clear to me right now ;)

> Clarify inheritance behavior of observer methods
> ------------------------------------------------
>
>                 Key: CDI-277
>                 URL: https://issues.jboss.org/browse/CDI-277
>             Project: CDI Specification Issues
>          Issue Type: Clarification
>            Reporter: Arne Limburg
>
> Chapter 4.2 of the (1.0) spec misses a bullet point about inheritance of observer methods.
> Either
> - If X declares a non-static observer method x() then Y does inherit this method.
> or
> - If X declares a non-static observer method x() then Y does not inherit this method.
> (This behavior is different to what is defined in the Common Annotations for the Java Platform specification.)
> should be added.
> Don't know, what's right through...

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