[cdi-dev] [JBoss JIRA] (CDI-502) Clarify "contains" meaning in "Legal bean types" specification.

[Jozef Hartinger (JIRA)]

    [ https://issues.jboss.org/browse/CDI-502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13035932#comment-13035932 ] 

Jozef Hartinger commented on CDI-502:
-------------------------------------

"Assignability of raw and parameterized types" rules which do not currently allow this usecase. That indirectly indicates that this scenario is not supported by the spec. If we want to change it we'll need to update the rules also.

> Clarify "contains" meaning in "Legal bean types" specification.
> ---------------------------------------------------------------
>
>                 Key: CDI-502
>                 URL: https://issues.jboss.org/browse/CDI-502
>             Project: CDI Specification Issues
>          Issue Type: Clarification
>          Components: Beans, Inheritance and Specialization
>            Reporter: Tomasz Krakowiak
>
> CDI 1.1, section 2.2.1. Legal bean types says:
> {quote}
> A parameterized type that contains a wildcard type parameter is not a legal bean type.
> {quote}
> Does it means direct containment or deep/recursive containment?
> I understand this is clearly illegal:
> {code}
> @Produces
> List<?> produceList(){
> //...
> }
> {code}
> But, are those two bean definitions legal:
> {code}
> @Produces
> List<Optional<?>> produceList(){
> //...
> }
> {code}
> {code}
> // Bean types: MyList, List<Optional<?>>, Object
> // or
> // Bean types: MyList, Object
> @Dependent
> MyList extends List<Optional<?>> {
> //...
> }
> {code}



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