core/src/main/scala/spark/rdd/FlatMappedRDD.scala


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package spark.rdd

import spark.{RDD, Partition, TaskContext}


private[spark]
class FlatMappedRDD[U: ClassManifest, T: ClassManifest](
    prev: RDD[T],
    f: T => TraversableOnce[U])
  extends RDD[U](prev) {

  override def getPartitions: Array[Partition] = firstParent[T].partitions

  override def compute(split: Partition, context: TaskContext) =
    firstParent[T].iterator(split, context).flatMap(f)
}