JPMML is a great library for evaluating PMML models, including things like feature transformation and a good range of model support. However, it's license is AGPL3, which makes it hard to include in Apache projects.
I'm looking to evaluate PMML models as part of a custom NIFI processor, so need an evaluator library with and Apache license.
That's a start, however PMML support in Spark is a way off being complete. In particular no support for transformations yet. Spark would be a great platform for this, though is a very heavy platform to spin up for simple scoring in a NiFi.
pattern has a dependency on jpmml-model listed in their build. Looking at the licensing for that package - its BSD-3 which is actually pretty open from looking at this license comparison site, unless I'm missing something it seems this would be ok otherwise why would Cascading include in as they are Apache2. Here is the Pattern license link as well calling out the jpmml-model inclusion which again doesn't look to be too restrictive at all. Let me know if you think I'm misunderstanding the licensing at all.