refactoring using writeByteBuffer() from Utils.

core/src/main/scala/spark/Utils.scala

@@ -35,6 +35,7 @@ import org.apache.hadoop.fs.{Path, FileSystem, FileUtil}
 
 import spark.serializer.SerializerInstance
 import spark.deploy.SparkHadoopUtil
+import java.nio.ByteBuffer
 
 
 /**
@@ -68,6 +69,19 @@ private object Utils extends Logging {
     return ois.readObject.asInstanceOf[T]
   }
 
+  /**
+   * Primitive often used when writing {@link java.nio.ByteBuffer} to {@link java.io.DataOutput}.
+   */
+  def writeByteBuffer(bb: ByteBuffer, out: ObjectOutput) = {
+    if (bb.hasArray) {
+      out.write(bb.array(), bb.arrayOffset() + bb.position(), bb.remaining())
+    } else {
+      val bbval = new Array[Byte](bb.remaining())
+      bb.get(bbval)
+      out.write(bbval)
+    }
+  }
+
   def isAlpha(c: Char): Boolean = {
     (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')
   }

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

@@ -54,13 +54,7 @@ private[spark] class ParallelCollectionPartition[T: ClassManifest](
     values.foreach(x => {
       val bb = ser.serialize(x)
       out.writeInt(bb.remaining())
-      if (bb.hasArray) {
-        out.write(bb.array(), bb.arrayOffset() + bb.position(), bb.remaining())
-      } else {
-        val b = new Array[Byte](bb.remaining())
-        bb.get(b)
-        out.write(b)
-      }
+      Utils.writeByteBuffer(bb, out)
     })
   }
 

core/src/main/scala/spark/scheduler/TaskResult.scala

@@ -21,7 +21,7 @@ import java.io._
 
 import scala.collection.mutable.Map
 import spark.executor.TaskMetrics
-import spark.SparkEnv
+import spark.{Utils, SparkEnv}
 import java.nio.ByteBuffer
 
 // Task result. Also contains updates to accumulator variables.
@@ -37,13 +37,7 @@ class TaskResult[T](var value: T, var accumUpdates: Map[Long, Any], var metrics:
     val bb = objectSer.serialize(value)
 
     out.writeInt(bb.remaining())
-    if (bb.hasArray) {
-      out.write(bb.array(), bb.arrayOffset() + bb.position(), bb.remaining())
-    } else {
-      val bbval = new Array[Byte](bb.remaining())
-      bb.get(bbval)
-      out.write(bbval)
-    }
+    Utils.writeByteBuffer(bb, out)
 
     out.writeInt(accumUpdates.size)
     for ((key, value) <- accumUpdates) {