Github user tillrohrmann commented on the pull request: https://github.com/apache/flink/pull/871#issuecomment-119548250 Really good work @thvasilo. I had some minor comments. The only thing we have to discuss is whether `score` should be part of the `Predictor` interface. With the current implementation, this implies that every `Predictor` has to produce a double prediction value. This does not hold for every `Predictor`. Why not using the `Scorer` class to calculate score values?
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