Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/5431#discussion_r28290695
--- Diff: mllib/src/main/scala/org/apache/spark/ml/param/params.scala ---
@@ -179,52 +179,96 @@ trait Params extends Identifiable with Serializable {
/**
* Sets a parameter (by name) in the embedded param map.
*/
- private[ml] def set(param: String, value: Any): this.type = {
+ protected final def set(param: String, value: Any): this.type = {
set(getParam(param), value)
}
/**
- * Gets the value of a parameter in the embedded param map.
+ * Optionally returns the user-supplied value of a param.
+ */
+ final def get[T](param: Param[T]): Option[T] = {
--- End diff --
I made this change in my last commit. `set` cannot be public because
`Model` also extends `Params` and some params should be immutable in models.
Maybe `clear` shouldn't be public either. But for get, getDefault, and
getOrDefault, I think those could be public.
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