[cdi-dev] [JBoss JIRA] (CDI-471) Support repeating qualifiers in typesafe resolution mechanism

Support repeating qualifiers in typesafe resolution mechanism ------------------------------------------------------------- Key: CDI-471 URL: https://issues.jboss.org/browse/CDI-471 Project: CDI Specification Issues Issue Type: Feature Request Components: Resolution Reporter: Antonin Stefanutti Labels: F2F2016 Fix For: 2.0 .Final As Java 8 provides improved support for [repeating annotations|http://docs.oracle.com/javase/tutorial/java/annotations/repea...], it would be valuable to percolate that support into the CDI typesafe resolution mechanism. For example, one could write: {code} @Qualifier @Repeatable(ContextNames.class) public interface @ContextName { String value; } public @interface ContextNames { ContextName[] value(); } {code} And then: {code} @ContextName("ctx1") class CamelContext1 { } @ContextName("ctx2") class CamelContext2 { } @Uri("") @Produces @ContextName("ctx1") @ContextName("ctx2") static ProducerTemplate producerTemplate(InjectionPoint ip, @Any Instance<CamelContext> instance) { } {code} That enables to use annotations both as a CDI qualifiers and a metadata providers while still be relying on standard typesafe resolution mechanism during the deployment phase to detect unsatisfied or ambiguous dependencies. Support of the annotation container / list for backward compatibility could be provided as well.