Github user ScrapCodes commented on a diff in the pull request:
https://github.com/apache/spark/pull/11410#discussion_r54555457
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/OuterScopes.scala
---
@@ -39,4 +41,35 @@ object OuterScopes {
def addOuterScope(outer: AnyRef): Unit = {
outerScopes.putIfAbsent(outer.getClass.getName, outer)
}
+
+ def getOuterScope(innerCls: Class[_]): AnyRef = {
+ assert(innerCls.isMemberClass)
+ val outerCls = innerCls.getDeclaringClass.getName
+ val outer = outerScopes.get(outerCls)
+ if (outer == null) {
+ outerCls match {
+ case REPLClass(line) =>
+ val loader = Utils.getContextOrSparkClassLoader
+ def loadCls(clsName: String): Class[_] = Class.forName(clsName,
true, loader)
+
+ val cls1 = loadCls(line + "$read$")
+ val obj1 = cls1.getField("MODULE$").get(null)
+
+ val obj2 = cls1.getMethod("INSTANCE").invoke(obj1)
+ val cls2 = loadCls(line + "$read")
+
+ val obj3 = cls2.getMethod("$iw").invoke(obj2)
+ val cls3 = loadCls(line + "$read$$iw")
+
+ cls3.getMethod("$iw").invoke(obj3)
+
+ case _ => null
+ }
+ } else {
+ outer
+ }
+ }
+
+ // The format of REPL generated wrapper class's name, e.g.
`$line12.$read$$iw$$iw`
--- End diff --
Ping @som-snytt and @retronym, Am I correct about the assumption that these
wrappers are not likely to change very frequently ?
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