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 Assignee: Antoine Sabot-Durand Fix For: 2.0 (discussion) 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}