Address review comments: http://mail.openjdk.java.net/pipermail/core-libs-dev/2016-September/043655.html There are ... "some concerns about the evolvability of this API. The filter already receives a handful of parameters; it seems quite unlikely that a use case will not emerge where the filter needs more information in the future (say, the caller context, the caller class loader, etc.) One strategy for evolution is, rather than pass a handful of parameters, pass an aggregate, where the aggregate has getters for the parameters. "