Datasets of lists of data classes / tuples don't work

While support for data classes in arrays works fine:

dsOf(
    arrayOf(1 to 2, 3 to 4)
).show()

This doesn’t work

dsOf(
    listOf(1 to 2, 3 to 4)
).show()

The exception is:

Exception in thread "main" java.lang.UnsupportedOperationException: No Encoder found for kotlin.Pair[A,B]
- array element class: "kotlin.Pair"
- root class: "java.util.List"

I suspect this is because the encoding for lists in the schema() function of the API misses a recursive call on its subtypes somehow. Needs to be investigated though, as it would also fix Datasets of lists of Tuples I think.

[asm0dey]

Currently, the plan is to release version 1.0 after Kotlin 1.5.20 release because a couple of things is fixed there:

1. In 1.5.0, lambda serialization is broken and requires an additional, potentially dangerous compiler flag to WA
2. In 1.5.20, interop with Scala may be improved, which will allow upgrading Scala to the latest minor

Thank you very much for your effort; you will be most definitely mentioned (ping me if you want something specific to be written, please) in the next post 😃

[asm0dey]

Yes, fixed now. Yesterday Firefox told me, that it’s not secured.