Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/5930#discussion_r29736652
--- Diff: mllib/src/main/scala/org/apache/spark/ml/param/params.scala ---
@@ -218,6 +219,22 @@ class BooleanParam(parent: Params, name: String, doc:
String) // No need for isV
override def w(value: Boolean): ParamPair[Boolean] = super.w(value)
}
+/** Specialized version of [[Param[Array[T]]]] for Java. */
+class ArrayParam[T : ClassTag](
--- End diff --
Having `ClassTag` is not Java friendly. `Array[T]` will be translated into
`Object` in Java to handle both primitive arrays and object arrays. How about
adding `StringArrayParam` instead of `ArrayParam[T]` in this PR?
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