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From "Jean-Philippe CLEMENT (JIRA)" <>
Subject [jira] [Commented] (ARIES-1500) Conversion fails with generics
Date Thu, 03 Mar 2016 16:15:18 GMT


Jean-Philippe CLEMENT commented on ARIES-1500:

Even if you create a factory method which returns the proper generic type to be injected in
another bean, the injection may fail (the equivalent code in regular Java would of course
compile and run). I experienced this issue several times. Maybe, can you share the spec about
the generics, so it will be clearer what is expected?

Furthermore, in that case the Blueprint syntax would not be correct as it should provide a
way to express the generic type, for instance:
<bean class="org.sample.MyBean<Integer>"/>

Could you tell more about the converters, how to make and "publish" them?

> Conversion fails with generics
> ------------------------------
>                 Key: ARIES-1500
>                 URL:
>             Project: Aries
>          Issue Type: Bug
>          Components: Blueprint
>    Affects Versions: blueprint-core-1.5.0
>         Environment: All
>            Reporter: Jean-Philippe CLEMENT
> Let's take a bean with the method setSomething(Something<T>) called via blueprint
with another bean implementing Something => exception saying that bean conversion is not
possible. But, if I change the method signature without the generic type setSomething(Something),
then it works as expected.
> Blueprint should not care for the generic type as Java is type erasure and do not exceed
the spec.
> There is no nice work around. Have to change all APIs used via Blueprint and take note
for all deviations. This is really heavy.

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