Github user kl0u commented on a diff in the pull request:
https://github.com/apache/flink/pull/3963#discussion_r117985885
--- Diff:
flink-libraries/flink-cep-scala/src/main/scala/org/apache/flink/cep/scala/package.scala
---
@@ -40,7 +44,11 @@ package object scala {
private[flink] def cleanClosure[F <: AnyRef](f: F, checkSerializable:
Boolean = true): F = {
ClosureCleaner.clean(f, checkSerializable)
- return f
+ f
+ }
+
+ private[flink] def mapToScala[T](map: JMap[String, JList[T]]):
Map[String, Iterable[T]] = {
+ map.asScala.mapValues(_.asScala.toIterable).toMap
--- End diff --
Why not getting rid of the last `.toMap` and return a `collection.Map`?
This will avoid an iteration over the elements of the `JMap` which is important
given that this method will be invoked at every incoming element. From the
rest, I think we are ok as the `asScala`s are just wrappers and the
`.mapValues` are lazily evaluated.
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