[SPARK-2314][SQL] Override collect and take in JavaSchemaRDD, forwarding to...

[SPARK-2314][SQL] Override collect and take in JavaSchemaRDD, forwarding to SchemaRDD implementations.

Author: Aaron Staple <aaron.staple@gmail.com>

Closes #1421 from staple/SPARK-2314 and squashes the following commits:

73e04dc [Aaron Staple] [SPARK-2314] Override collect and take in JavaSchemaRDD, forwarding to SchemaRDD implementations.

sql/core/src/main/scala/org/apache/spark/sql/api/java/JavaSchemaRDD.scala

@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql.api.java
 
+import java.util.{List => JList}
+
 import org.apache.spark.Partitioner
 import org.apache.spark.api.java.{JavaRDDLike, JavaRDD}
 import org.apache.spark.api.java.function.{Function => JFunction}
@@ -96,6 +98,20 @@ class JavaSchemaRDD(
     this
   }
 
+  // Overridden actions from JavaRDDLike.
+
+  override def collect(): JList[Row] = {
+    import scala.collection.JavaConversions._
+    val arr: java.util.Collection[Row] = baseSchemaRDD.collect().toSeq.map(new Row(_))
+    new java.util.ArrayList(arr)
+  }
+
+  override def take(num: Int): JList[Row] = {
+    import scala.collection.JavaConversions._
+    val arr: java.util.Collection[Row] = baseSchemaRDD.take(num).toSeq.map(new Row(_))
+    new java.util.ArrayList(arr)
+  }
+
   // Transformations (return a new RDD)
 
   /**