Github user wuchong commented on a diff in the pull request:
https://github.com/apache/flink/pull/3330#discussion_r101445785
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/functions/utils/UserDefinedFunctionUtils.scala
---
@@ -324,4 +325,19 @@ object UserDefinedFunctionUtils {
candidate == classOf[Time] && (expected == classOf[Int] || expected ==
classOf[JInt]) ||
candidate == classOf[Timestamp] && (expected == classOf[Long] ||
expected == classOf[JLong])
+ @throws[Exception]
+ def serialize(function: UserDefinedFunction): String = {
+ val byteArrayOutPut = new ByteArrayOutputStream
+ val objectOutPut = new ObjectOutputStream(byteArrayOutPut)
+ objectOutPut.writeObject(function)
+ objectOutPut.close()
+ Base64.encodeBase64URLSafeString(byteArrayOutPut.toByteArray)
+ }
+
+ @throws[Exception]
+ def deserialize(data: String): UserDefinedFunction = {
+ val byteData = Base64.decodeBase64(data)
+ new ObjectInputStream(
--- End diff --
You can get the object from byte array by
`InstantiationUtil.deserializeObject`
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