[cdi-dev] Clarification for manually resolving 'Instance'

[Mark Struberg]

>The parameterized type resolution rules are correct, it's just there 
> is no raw type of Instance to resolve.


Yes, I think too, but was not sure if everyone do see it that way.


> Should there be? Not sure if it would just be more confusing?

I already saw the usage of Instance.class without the TypeLiteral (which is pretty well hidden in the specs).
And people wondered why that doesn't work ...

LieGrue,
strub



----- Original Message -----
> From: Pete Muir <pmuir at redhat.com>
> To: Mark Struberg <struberg at yahoo.de>
> Cc: "cdi-dev at lists.jboss.org" <cdi-dev at lists.jboss.org>
> Sent: Sunday, September 25, 2011 9:44 PM
> Subject: Re: [cdi-dev] Clarification for manually resolving 'Instance'
> 
> See section 5.6.2. The built-in Instance - the spec only requires a bean of type 
> Instance<X> not of raw type Instance<>
> 
> I'm not sure there is a generalization here (or I don't understand 
> yours). The parameterized type resolution rules are correct, it's just there 
> is no raw type of Instance to resolve.
> 
> Should there be? Not sure if it would just be more confusing?
> 
> On 24 Sep 2011, at 11:41, Mark Struberg wrote:
> 
>>  Hi!
>> 
>>  Currently both Weld and OWB blow up if I resolve an unparameterized 
> 'Instance' object.
>> 
>>  beanManager.getBeans(Instance.class);
>> 
>>  will return zero beans, so there is no way to call beanManager.getReference 
> ...
>> 
>> 
>>  Of course with a little trick I was able to get it working in OWB:
>>  Type instanceType = new 
> TypeLiteral<Instance<Object>>(){}.getType();
>>  Set<Bean<?>> beans = beanManager.getBeans(instanceType);
>> 
>>  (did not test it on Weld yet)
> 
> This should work on Weld to.
> 
>> 
>> 
>>  My question is which behaviour is expected.
>>  This question could maybe be generalized to: how do beans for parameterized 
> types need to get handled?
>> 
>> 
>>  LieGrue,
>>  strub
>> 
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