Nifi RecordReader for Json?

[l vic]

I need to save two different json messages according to json schemas
available for each to different relational database tables.
I saw this blog:
https://blogs.apache.org/nifi/entry/record-oriented-data-with-nifi
with example using CSVRecordReader for csv->json transformation.
but what would be RecordReader for schema-based transformation from json?
Is this a valid approach, or what would be best approach to solve this
problem?
I am using: nifi-1.7.1-RC1...
Thank you,