Github user jerrypeng commented on the pull request: https://github.com/apache/storm/pull/785#issuecomment-146948299 @revans2 I don't think you solution will work either. I don't think we can get recursion and java annotations to work, since fields in annotations cannot default to a specific non-null type. To have annotations that contain fields of it self will result in a unending recursive definition: ComplexValidator key() default @ComplexValidator(type=Object.class, key=@ComplexValidator(type=Object.class, key=@ComplexValidator(...), value=ComplexValidator(ype=Object.class, key=@ComplexValidator(...));
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