Github user PieterJanVanAeken commented on the pull request: https://github.com/apache/flink/pull/1033#issuecomment-132495162 Fixed the style issues. At this point in time, it is not possible to run Scala-based graph algorithms from inside the Java API. Do you think this would be desirable behaviour? Using "Scala stuff" in the Java API seems wrong. But we could probably get it to work by having scala.GraphAlgorithm extend java.GraphAlgorithm where the java run method simply wraps the scala layer around the graph before applying the algorithm and then unwraps it afterwards.
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