dongjoon-hyun commented on code in PR #51509:
URL: https://github.com/apache/spark/pull/51509#discussion_r2209176334
##########
common/utils/src/main/scala/org/apache/spark/util/SparkClassUtils.scala:
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@@ -136,6 +137,33 @@ private[spark] trait SparkClassUtils {
}
}
}
+
+ /**
+ * Gets a list of all interfaces implemented by the given class and its
superclasses.
+ */
+ def getAllInterfaces(cls: Class[_]): List[Class[_]] = {
+ if (cls == null) {
+ return null
+ }
+ val interfacesFound = LinkedHashSet[Class[_]]()
+ getAllInterfacesHelper(cls, interfacesFound)
+ interfacesFound.toList
+ }
+
+ private def getAllInterfacesHelper(
+ clazz: Class[_],
+ interfacesFound: LinkedHashSet[Class[_]]): Unit = {
+ var currentClass = clazz
+ while (currentClass != null) {
+ val interfaces = currentClass.getInterfaces
+ for (i <- interfaces) {
+ if (interfacesFound.add(i)) {
+ getAllInterfacesHelper(i, interfacesFound)
+ }
+ }
+ currentClass = currentClass.getSuperclass
+ }
+ }
Review Comment:
Technically, this is a Scala version of
https://github.com/apache/commons-lang/blob/3abb3a25509bcf0a6e631e2b7bef1a8f30b299c6/src/main/java/org/apache/commons/lang3/ClassUtils.java#L352-L361
https://github.com/apache/commons-lang/blob/3abb3a25509bcf0a6e631e2b7bef1a8f30b299c6/src/main/java/org/apache/commons/lang3/ClassUtils.java#L369-L381
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