[cdi-dev] [JBoss JIRA] (CDI-460) Support repeating qualifiers in CDI SPI

Antonin Stefanutti (JIRA) issues at jboss.org
Thu Sep 11 06:34:19 EDT 2014

     [ https://issues.jboss.org/browse/CDI-460?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antonin Stefanutti updated CDI-460:
    Summary: Support repeating qualifiers in CDI SPI  (was: Support repeating qualifiers)

> Support repeating qualifiers in CDI SPI
> ---------------------------------------
>                 Key: CDI-460
>                 URL: https://issues.jboss.org/browse/CDI-460
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>          Components: Portable Extensions
>    Affects Versions: 2.0 (discussion)
>            Reporter: Antonin Stefanutti
> In CDI 1.2, it is not explicitly stated whether altering the annotation-based metadata in a way to add multiple annotations of the same type is possible or not. That situation occurs with the following combinations:
> {{AnnotatedType.getAnnotations()}} and {{ProcessAnnotatedType.setAnnotatedType(AnnotatedType at)}},
> {{BeanAttributes.getQualifiers()}}, and {{ProcessBeanAttributes.setBeanAttributes(BeanAttributes ba)}},
> {{InjectionPoint.getQualifiers}} and {{ProcessInjectionPoint.setInjectionPoint(InjectionPoint ip)}}.
> Being able to decorate these metadata with repeating annotations enables powerful and elegant use cases as discussed in [OWB-1004|https://issues.apache.org/jira/browse/OWB-1004], that is the ability to use an annotation both as a CDI qualifier and a metadata provider during injection.
> Given that Java 8 provides support for [repeating annotations|http://docs.oracle.com/javase/tutorial/java/annotations/repeating.html], it seems logical to have repeating annotations supported at the CDI SPI level. Tough, that's important to have that support explicitly stated and specified in CDI.
> Indeed, while Weld permits metadata alteration with repeating annotations, OpenWebBeans does not for the moment though developers understand the need and are willing to open that behavior as discussed in [OWB-1004|https://issues.apache.org/jira/browse/OWB-1004] as long as that support will be made explicit in the specification.
> That applies as well for {{EventMetadata.getQualifiers}} in _read-only_.

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