[GitHub] incubator-spark pull request: [java8API] SPARK-964 Investigate the...

[ScrapCodes <gi...@git.apache.org>]

Github user ScrapCodes commented on a diff in the pull request:

    https://github.com/apache/incubator-spark/pull/539#discussion_r10023650
  
    --- Diff: core/src/main/java/org/apache/spark/api/java/function/DoubleFunction.java ---
    @@ -15,13 +15,10 @@
      * limitations under the License.
      */
     
    -package org.apache.spark.api.java.function
    +package org.apache.spark.api.java.function;
     
    -import scala.reflect.ClassTag
    +import java.io.Serializable;
     
    -/**
    - * A function that takes two inputs and returns zero or more output records.
    - */
    -abstract class FlatMapFunction2[A, B, C] extends Function2[A, B, java.lang.Iterable[C]] {
    -  def elementType() : ClassTag[C] = ClassTag.Any.asInstanceOf[ClassTag[C]]
    +public interface DoubleFunction<T> extends Serializable {
    +  public Double call(T t) throws Exception;
    --- End diff --
    
    Hey Matei and Patrick, I was curious what would be its benefit ?


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