如何从包含Enums的案例类创建Spark Dataset或Dataframe

I have been trying to create Spark Dataset using case classes that contain Enums but I'm not able to. I'm using Spark version 1.6.0. The exceptions is complaining about that there are no encoder found for my Enum. Is this not possible in Spark, to have enums in the data? I have been trying to create Spark Dataset usin