WweiL commented on code in PR #41558:
URL: https://github.com/apache/spark/pull/41558#discussion_r1227294305
##########
connector/connect/common/src/main/scala/org/apache/spark/sql/connect/common/UdfUtils.scala:
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@@ -95,6 +96,26 @@ private[sql] object UdfUtils extends Serializable {
}
}
+ def mapValuesAdaptor[K, V, S, U, IV](
+ f: (K, Iterator[V], GroupState[S]) => U,
+ valueMapFunc: IV => V): (K, Iterator[IV], GroupState[S]) => U = {
+ (k: K, itr: Iterator[IV], s: GroupState[S]) =>
+ {
+ f(k, itr.map(v => valueMapFunc(v)), s)
+ }
+ }
+
+ def mapGroupsWithStateFuncToScalaFunc[K, V, S, U](
+ f: MapGroupsWithStateFunction[K, V, S, U]): (K, Iterator[V],
GroupState[S]) => U = {
+ (key, data, groupState) => f.call(key, data.asJava, groupState)
+ }
+
+ def flatMapGroupsWithStateFuncToScalaFunc[K, V, S, U](
Review Comment:
With this function, I think we also need to add `java-specific` APIs to
`KeyValueGroupedDataset`?
For example:
https://github.com/apache/spark/blob/28869401eff8fcd94aa68d662fdd4d3dbe2f58af/connector/connect/client/jvm/src/main/scala/org/apache/spark/sql/KeyValueGroupedDataset.scala#L118-L136
and this:
https://github.com/apache/spark/blob/28869401eff8fcd94aa68d662fdd4d3dbe2f58af/sql/core/src/main/scala/org/apache/spark/sql/KeyValueGroupedDataset.scala#L575-L603
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