Github user huangjs commented on the pull request:
https://github.com/apache/spark/pull/3099#issuecomment-63115229
@mengxr, Thanks for the explanation. Statically type checked pipelines is a
nice, but I don't think we need it for parameters, as usually the parameters
are read either from user inputs or some database. And we'll need to check
their range anyway (e.g. positive non zero values, or [0, 1), etc. ).
Input validation would be good enough. And we can just use a Map[String,
Any] for inputs. And we can have a Map for pipeline -> parameters too.
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