[cdi-dev] Getting injection point from Bean#create

[arjan tijms]

Hi

On Thu, Nov 20, 2014 at 9:42 PM, Jozef Hartinger <jharting at redhat.com>
wrote:

> The simplest thing you can do is:
>
> Bean<InjectionPoint> bean = (Bean<InjectionPoint>)
> manager.resolve(manager.getBeans(InjectionPoint.class));
> InjectionPoint ip = (InjectionPoint) manager.getReference(bean,
> InjectionPoint.class, manager.createCreationalContext(bean));


I just tried this again, and unfortunately it now fails on Weld.

I quickly tried a series of Weld versions and this is the result:

Weld
2.2.6 works
2.2.8 works
2.2.9 fails
2.2.13 fails
2.2.14 fails
2.2.16 fails
2.3.0 fails
2.3.2 fails

So apparently it broke between 2.2.8 and 2.2.9.

Would it be possible to add a TCK test for this? This would be really
helpful as we'd like to use this for the JSF 2.3 RI.

Kind regards,
Arjan Tijms







>
>
> On 11/19/2014 05:06 PM, arjan tijms wrote:
>
>> Hi,
>>
>> In a producer method it's trivial to get access to an InjectionPoint
>> instance representing the point where the value produced by the
>> producer will be injected.
>>
>> When registering a Bean manually from an extension using
>> AfterBeanDiscovery#addBean, this is not immediately obvious.
>>
>> After some fumbling with the CDI APIs I came up with the following
>> code that seems to work on both Weld and OWB (didn't test CanDI yet).
>>
>> It uses a small "dummy" class, which is used to grab an InjectionPoint
>> off:
>>
>> In a Bean:
>>
>> public Object create(CreationalContext<Object> creationalContext) {
>>
>> InjectionPoint injectionPoint = (InjectionPoint)
>> beanManager.getInjectableReference(
>>              resolve(beanManager,
>> InjectionPointGenerator.class).getInjectionPoints().iterator().next(),
>> creationalContext
>> );
>>
>> With InjectionPointGenerator being the following class:
>>
>> public class InjectionPointGenerator {
>>      @Inject
>>      private InjectionPoint injectionPoint;
>> }
>>
>> And resolve being the following method:
>>
>> public static <T> Bean<T> resolve(BeanManager beanManager, Class<T>
>> beanClass) {
>>          Set<Bean<?>> beans = beanManager.getBeans(beanClass);
>>
>>          for (Bean<?> bean : beans) {
>>              if (bean.getBeanClass() == beanClass) {
>>                  return (Bean<T>)
>> beanManager.resolve(Collections.<Bean<?>>singleton(bean));
>>              }
>>          }
>>
>>          return (Bean<T>) beanManager.resolve(beans);
>>      }
>>
>> As mentioned, while this seems to work, I wonder if it's the best
>> approach.
>>
>> Kind regards,
>> Arjan
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>>
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>
>
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