[cdi-dev] [JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method

[Jozef Hartinger (JIRA)]

    [ https://issues.jboss.org/browse/CDI-271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12755973#comment-12755973 ] 

Jozef Hartinger commented on CDI-271:
-------------------------------------

Furthermore the spec does not currently define the behaviour of other InjectionPoint methods besides getType() and getQualifiers(). For example getMember(), getAnnotated(), etc. are well defined when the InjectionPoint represents an Instance but not for Event.
                
> Provide a way to inject Event metadata into an observer method
> --------------------------------------------------------------
>
>                 Key: CDI-271
>                 URL: https://issues.jboss.org/browse/CDI-271
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>          Components: Events
>            Reporter: Arne Limburg
>            Assignee: Arne Limburg
>             Fix For: 1.1.PFD
>
>
> Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
> Consider the following example:
> {code}
> @Inject @MyQualifier
> Event<MyObject> event;
> public void fireEvent(MyObject object, MyTypeValue type) {
>     event.select(new MyTypeAnnotationLiteral(type)).fire(object);
> }
> {code}
> Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
> {code}
> public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
>     MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
>     MyTypeValue value = annotation.value();
>     ...
> }
> {code}

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