Projection processor recognizes 'Array' return type of UDF as String.

[eduardzl]

Hello.
First would like to a big positive feedback to Hortonworks for the Streamline product. :)

Now..
I have a case when the output of Kafka source component is a string field and I would like to feed it as input to my custom processor which requests array of strings as input.
So it seems that this can be handled using Projection. I have implemented the UDF that simply converts string to list of strings.

Uploaded this udf to the Streamline, it recognizes the output type of udf as Array.

So far, so good.
Now when I try to apply this udf in Projection :

The Projection produces the output field with type String and not Array.

How can I resolve this problem ?
I would like to work with arrays as event fields.