Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/5930#discussion_r29789116
--- Diff: mllib/src/main/scala/org/apache/spark/ml/param/params.scala ---
@@ -218,6 +219,18 @@ 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 StringArrayParam(parent: Params, name: String, doc: String, isValid:
Array[String] => Boolean)
+ extends Param[Array[String]](parent, name, doc, isValid) {
+
+ def this(parent: Params, name: String, doc: String) =
+ this(parent, name, doc, ParamValidators.alwaysTrue)
+
+ override def w(value: Array[String]): ParamPair[Array[String]] =
super.w(value)
+
+ private[param] def wCast(value: Seq[String]): ParamPair[Array[String]] =
w(value.toArray)
--- End diff --
Would renaming `wCast` -> `w` work? I think it should compile.
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