Add missing class

core/src/main/scala/org/apache/spark/api/java/function/MapPartitionsWithIndexFunction.scala

@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function
+
+import scala.reflect.ClassTag
+
+/**
+ * A function that takes the a partition 
+ */
+abstract class MapPartitionsWithIndexFunction[A, B] extends Function2[Integer,
+  java.util.Iterator[A], java.util.Iterator[B]] {
+  def elementType() : ClassTag[B] = ClassTag.Any.asInstanceOf[ClassTag[B]]
+}