If you are looking to do data validation from the JVM, you may try Baleen (written in Kotlin): https://github.com/ShopRunner/baleen/

I'm one of the contributors. We created a DSL in the language to describe the data and create tests. You can then use that data description to validate against json, csv, avro... One of the neat things we came up with was the concept of a data trace which is like a stack trace but is a path through the data to a particular error.