Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/2455#discussion_r18423433
--- Diff:
core/src/main/scala/org/apache/spark/util/random/RandomSampler.scala ---
@@ -39,13 +42,46 @@ trait RandomSampler[T, U] extends Pseudorandom with
Cloneable with Serializable
/** take a random sample */
def sample(items: Iterator[T]): Iterator[U]
+ /** return a copy of the RandomSampler object */
override def clone: RandomSampler[T, U] =
throw new NotImplementedError("clone() is not implemented.")
}
+@DeveloperApi
+private [spark]
+object RandomSampler {
+ /** Default random number generator used by random samplers */
+ def rngDefault: Random = new XORShiftRandom
+
+ /**
+ * Default gap sampling maximum
--- End diff --
add `.` to the end or insert an empty line. You can check the generated doc
by `sbt/sbt unidoc`.
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