Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/5740#discussion_r29273820
--- Diff: mllib/src/main/scala/org/apache/spark/ml/param/params.scala ---
@@ -65,38 +90,129 @@ class Param[T] (val parent: Params, val name: String,
val doc: String) extends S
}
}
+/**
+ * Factory methods for common validation functions for [[Param.isValid]].
+ * The numerical methods only support Int, Long, Float, and Double.
+ */
+object ParamValidate {
--- End diff --
We might need `sealed abstract class ParamValidate` to make it show up
correctly in Java. For the name, I recommend `ParamValidators` instead of
`ParamValidate`.
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