[jira] [Created] (TAMAYA-74) Support for type narrowing

["Oliver B. Fischer (JIRA)" <ji...@apache.org>]

Oliver B. Fischer created TAMAYA-74:
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             Summary: Support for type narrowing
                 Key: TAMAYA-74
                 URL: https://issues.apache.org/jira/browse/TAMAYA-74
             Project: Tamaya
          Issue Type: New Feature
          Components: Core
    Affects Versions: 0.2-incubating
            Reporter: Oliver B. Fischer
             Fix For: 0.2-incubating


Tamays should support type narrowing. Currently a user of Tamaya can only specify the concrete target type when getting a property value as object value.

I would like to see support for type narrowing in Tamaya to according to these rules:

Given an interface or abstract class A and a class B implementing or inheriting from A. If a user requests a property of type A Tamaya should be able to determine that B is a valid return value for this request and return an instance of B.

Given an interface  or abstract class A and two classes B and C implementing or inheriting from A. If a user requests a property of type A Tamays should be able to determine that B and C are valid return values for this request and return an instance of B or C.



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