Is it an oversight that ObserverMethod doesn't have getInjectionPoints()?

[ljnelson]

I naïvely assumed that once I got ahold of an ObserverMethod I could find out what injection points it has.

I know that I can get the AnnotatedMethod, go through the AnnotatedParameters and weed out the one that is the event parameter.  But that seems quite clumsy.  I was assuming that much like a Producer an ObserverMethod would have a set of InjectionPoints representing its parameters.  I seem to recall the specification even talks about the parameters being injection points.

Mainly just because I'm curious, was there a design decision to leave this method off?  Or was it just an oversight?

Best,

Laird

[manovotn]

Hi,

the ability to have injection point has been there since forever (it was possible even in 1.0) yet the option you are asking for is lacking. I certainly haven't been there when/is the design decision was taken

Javadoc of InjectionPoint even mentions that it can be a parameter of an Observer method.

I'd say what you ask is a feature request material for CDI spec.

Not sure how user friendly would be any solution on Weld side, we could probably have something like WeldProcessObserverMethod lifecycle event with a method returning it but that's hardly friendlier than just going over the params as you suggested.

Also note that Producer#getInjectionPoints() is really only good for browsing them as you cannot swap them out with another. At that point, they are only used for validation purposes.

[manovotn]

Actually, our implementation already has the very method you are after, so if you would be fine doing some casting, be our guest.

core/ObserverMethodImpl.java at 3.1.0.Final · weld/core · GitHub