[webbeans-dev] TypeVariabe Event Type

[Pete Muir]

On 26 Aug 2009, at 20:42, Pete Muir wrote:

>
> On 26 Aug 2009, at 20:33, Gurkan Erdogdu wrote:
>
>> I also implemented ProcessAnnotatedType like
>>
>> public class ProcessAnnotatedTypeImpl<X> impements
>> ProcessAnnotatedType<X>{}
>>
>> then firing event like this
>> ProcessAnnotatedType<X> event = new ProcessAnnotatedTypeImpl<X>();
>> or
>> ProcessAnnotatedType<?> event = new ProcessAnnotatedType();
>
> Thats not quite what I wrote, note the includsion of a pair of braces,
> causing an anonymous inner class to be created () {}
>
>> Then in BeanManagerImpl.fireEvent(Object event, ....)
>> event.getClass.getTypeParameters always returns TypeVariables.
>
> I believe this method all return's type variables.

*always* returns type variables.

>
>>
>>>>> You must create a sub class, this then allows Java to resolve the
>> type variables
>> What do you mean by saying "allows Java to resolve the type
>> variables"?
>
> The type variables of a parameterized type can sometimes be resolved
> to an actual type, sometimes they can't. This is defined by the Java
> Language Spec (where it discusses type inference).
>
> They can in the case of a subclass of a generic type, they can't for
> the class itself.
>
>>
>> --Gurkan
>>
>> From: Pete Muir <pmuir at redhat.com>
>> To: Gurkan Erdogdu <gurkanerdogdu at yahoo.com>
>> Cc: webbeans-dev at lists.jboss.org
>> Sent: Wednesday, August 26, 2009 10:21:54 PM
>> Subject: Re: [webbeans-dev] TypeVariabe Event Type
>>
>> Yes, you can't fire an event of type Foo<T>. You must create a sub
>> class, this then allows Java to resolve the type variables. In the
>> RI we do
>>
>> new ProcessAnnotatedTypeImpm<T>() {};
>>
>> to achieve this.
>>
>> On 26 Aug 2009, at 20:15, Gurkan Erdogdu wrote:
>>
>>> Hi;
>>>
>>> In method, public void fireEvent(Object event, Annotation...
>> qualifiers) in BeanManager; spec specifies that runtime event type
>> can not be TypeVariable. But when I look at portable events, all of
>> them contain type variable.
>>>
>>> For Example;
>>>
>>> ProcessAnnotatedType<X>
>>>
>>> When fires this event, event.getClass.getTypeVariables always
>> contain TypeVariable.
>>>
>>> Is this true?
>>>
>>> Thanks;
>>>
>>> --Gurkan
>>>
>>>
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>>
>>
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