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From "James Song (JIRA)" <beehive-...@incubator.apache.org>
Subject [jira] Closed: (BEEHIVE-257) control inheritance: annotation on a jcx not inherited correctly
Date Mon, 20 Jun 2005 17:52:20 GMT
     [ http://issues.apache.org/jira/browse/BEEHIVE-257?page=all ]
     
James Song closed BEEHIVE-257:
------------------------------


Test is added by r191519 and passes.

> control inheritance: annotation on a jcx not inherited correctly
> ----------------------------------------------------------------
>
>          Key: BEEHIVE-257
>          URL: http://issues.apache.org/jira/browse/BEEHIVE-257
>      Project: Beehive
>         Type: Bug
>   Components: Controls
>     Versions: V1Beta
>     Reporter: James Song
>     Assignee: James Song
>      Fix For: V1Beta

>
> This is reported by David Read, and might blocks OAM developments.
> The inheritance hirachey:
> The JCX hierarchy looks like:
> =====================
> TopLevelJcx extends InheritanceTest
> ^
> FirstLevelJcx extends TopLevelJcx
> ^
> SecondLevelJcx extends FirstLevelJcx
> The annotation:
> @PropertySet(externalConfig = true)
> @Retention(RetentionPolicy.RUNTIME)
> @Inherited
> public @interface MyAnnotation
> {
>   String value() default "DEFAULT";
> } 
> The annotation exists on TopLevelJcx and on SecondLevelJcx, but not in the "middle" (FirstLevelJcx).
 The "client side is a JPF that has two fields for each type ... one with no annotation on
the field and one with an annotation on the field.
>  
> I see the field overrides working and the override where there is an annotation on the
JCX (SecondLevelJcx).  It's the one in the middle that seems busted.  What's odd is that the
value that is returned from the context is the default value for the property.  I would have
expected a null value for the annotation itself.  It's like it's stuck half way between being
there and not being there.
>  
> Ken's comment on this:
> "I thought this might have been done as part of the general "support inheritance" work,
but looking at the code I can believe it doesn't work :).  
>  
> Dave, what's your example look like from the client access perspective?  Ie, how are
you attempting to get the inherited annotation?
>  
> Seems like the right place to do this is in AnnotatedElementMap.getProperty(), where
today we just call getAnnotation() on the java.lang.reflect.AnnotatedElement (which, per docs,
will not walk up the interface tree), we need to manually do a breadth-first walk up."

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