Minor changes about naming and order

Author: jerryshao

core/src/main/scala/org/apache/spark/Dependency.scala

@@ -66,8 +66,6 @@ class ShuffleDependency[K, V, C](
     val ascending: Boolean = true)
   extends Dependency(rdd.asInstanceOf[RDD[Product2[K, V]]]) {
 
-  def isKeySorted = keyOrdering.isDefined
-
   val shuffleId: Int = rdd.context.newShuffleId()
 
   val shuffleHandle: ShuffleHandle = rdd.context.env.shuffleManager.registerShuffle(

core/src/main/scala/org/apache/spark/rdd/OrderedRDDFunctions.scala

@@ -59,6 +59,6 @@ class OrderedRDDFunctions[K : Ordering : ClassTag,
     val part = new RangePartitioner(numPartitions, self, ascending)
     new ShuffledRDD[K, V, V, P](self, part)
       .setKeyOrdering(ordering)
-      .setAscendingFlag(ascending)
+      .setSortFlag(ascending)
   }
 }

core/src/main/scala/org/apache/spark/rdd/ShuffledRDD.scala

@@ -65,11 +65,6 @@ class ShuffledRDD[K, V, C, P <: Product2[K, C] : ClassTag](
     this
   }
 
-  def setAscendingFlag(ascending: Boolean): ShuffledRDD[K, V, C, P] = {
-    this.ascending = ascending
-    this
-  }
-
   /** Set aggregator for RDD's shuffle. */
   def setAggregator(aggregator: Aggregator[K, V, C]): ShuffledRDD[K, V, C, P] = {
     this.aggregator = Option(aggregator)
@@ -82,6 +77,12 @@ class ShuffledRDD[K, V, C, P <: Product2[K, C] : ClassTag](
     this
   }
 
+  /** Set sort flag for RDD's sorting. */
+  def setSortFlag(ascending: Boolean): ShuffledRDD[K, V, C, P] = {
+    this.ascending = ascending
+    this
+  }
+
   override def getDependencies: Seq[Dependency[_]] = {
     List(new ShuffleDependency(prev, part, serializer,
       keyOrdering, aggregator, mapSideCombine, ascending))