Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/9674#discussion_r44983864
--- Diff: mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala ---
@@ -166,6 +173,34 @@ class Pipeline(override val uid: String) extends
Estimator[PipelineModel] {
"Cannot have duplicate components in a pipeline.")
theStages.foldLeft(schema)((cur, stage) => stage.transformSchema(cur))
}
+
+ override def write: Writer = new PipelineWriter(this)
+}
+
+object Pipeline extends Readable[Pipeline] {
+
+ override def read: Reader[Pipeline] = new PipelineReader
+
+ override def load(path: String): Pipeline = read.load(path)
+}
+
+private[ml] class PipelineWriter(instance: Pipeline) extends Writer {
+
+ PipelineSharedWriter.validateStages(instance.getStages)
--- End diff --
Should users be able to save an incomplete pipeline? For example, I could
make a template pipeline, send it to other users, and they only need to fill in
some required params like inputCol after they load it back.
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