Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/9358#discussion_r43398228
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
---
@@ -37,3 +35,39 @@ trait Encoder[T] extends Serializable {
/** A ClassTag that can be used to construct and Array to contain a
collection of `T`. */
def clsTag: ClassTag[T]
}
+
+object Encoder {
+ import scala.reflect.runtime.universe._
+
+ def forBoolean: Encoder[java.lang.Boolean] = ExpressionEncoder(flat =
true)
+ def forByte: Encoder[java.lang.Byte] = ExpressionEncoder(flat = true)
+ def forShort: Encoder[java.lang.Short] = ExpressionEncoder(flat = true)
+ def forInt: Encoder[java.lang.Integer] = ExpressionEncoder(flat = true)
+ def forLong: Encoder[java.lang.Long] = ExpressionEncoder(flat = true)
+ def forFloat: Encoder[java.lang.Float] = ExpressionEncoder(flat = true)
+ def forDouble: Encoder[java.lang.Double] = ExpressionEncoder(flat = true)
+ def forString: Encoder[java.lang.String] = ExpressionEncoder(flat = true)
+
+ def typeTagOfTuple2[T1 : TypeTag, T2 : TypeTag]: TypeTag[(T1, T2)] =
typeTag[(T1, T2)]
+
+ private def getTypeTag[T](c: Class[T]): TypeTag[T] = {
--- End diff --
This is really really hacky, I'm not sure if I did it right...
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