Github user tedyu commented on a diff in the pull request:
https://github.com/apache/spark/pull/10664#discussion_r59631589
--- Diff: mllib/src/main/scala/org/apache/spark/mllib/fpm/PrefixSpan.scala
---
@@ -566,4 +576,88 @@ object PrefixSpan extends Logging {
@Since("1.5.0")
class PrefixSpanModel[Item] @Since("1.5.0") (
@Since("1.5.0") val freqSequences: RDD[PrefixSpan.FreqSequence[Item]])
- extends Serializable
+ extends Saveable with Serializable {
+
+ /**
+ * Save this model to the given path.
+ * It only works for Item datatypes supported by DataFrames.
+ *
+ * This saves:
+ * - human-readable (JSON) model metadata to path/metadata/
+ * - Parquet formatted data to path/data/
+ *
+ * The model may be loaded using [[PrefixSpanModel.load]].
+ *
+ * @param sc Spark context used to save model data.
+ * @param path Path specifying the directory in which to save this
model.
+ * If the directory already exists, this method throws an
exception.
+ */
+ @Since("2.0.0")
+ override def save(sc: SparkContext, path: String): Unit = {
--- End diff --
Is sc used ?
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