[SPARK-5123][SQL] Reconcile Java/Scala API for data types.

Having two versions of the data type APIs (one for Java, one for Scala) requires downstream libraries to also have two versions of the APIs if the library wants to support both Java and Scala. I took a look at the Scala version of the data type APIs - it can actually work out pretty well for Java out of the box.

As part of the PR, I created a sql.types package and moved all type definitions there. I then removed the Java specific data type API along with a lot of the conversion code.

This subsumes https://github.com/apache/spark/pull/3925

Author: Reynold Xin <rxin@databricks.com>

Closes #3958 from rxin/SPARK-5123-datatype-2 and squashes the following commits:

66505cc [Reynold Xin] [SPARK-5123] Expose only one version of the data type APIs (i.e. remove the Java-specific API).

1 files changed, 2 insertions, 2 deletions

diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 46a54c6818..b2c546da21 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -254,10 +254,10 @@ object SQL {
         |import org.apache.spark.sql.catalyst.expressions._
         |import org.apache.spark.sql.catalyst.plans.logical._
         |import org.apache.spark.sql.catalyst.rules._
-        |import org.apache.spark.sql.catalyst.types._
         |import org.apache.spark.sql.catalyst.util._
         |import org.apache.spark.sql.execution
         |import org.apache.spark.sql.test.TestSQLContext._
+        |import org.apache.spark.sql.types._
         |import org.apache.spark.sql.parquet.ParquetTestData""".stripMargin,
     cleanupCommands in console := "sparkContext.stop()"
   )
@@ -284,11 +284,11 @@ object Hive {
         |import org.apache.spark.sql.catalyst.expressions._
         |import org.apache.spark.sql.catalyst.plans.logical._
         |import org.apache.spark.sql.catalyst.rules._
-        |import org.apache.spark.sql.catalyst.types._
         |import org.apache.spark.sql.catalyst.util._
         |import org.apache.spark.sql.execution
         |import org.apache.spark.sql.hive._
         |import org.apache.spark.sql.hive.test.TestHive._
+        |import org.apache.spark.sql.types._
         |import org.apache.spark.sql.parquet.ParquetTestData""".stripMargin,
     cleanupCommands in console := "sparkContext.stop()",
     // Some of our log4j jars make it impossible to submit jobs from this JVM to Hive Map/Reduce