As is, it's not good for much beyond looking cool. (Maybe implementing Postel's Law for a json API, but I think that's considered bad taste these days.)
If instead of transforming a single object it would output a table of src_field->dst_field, it could potentially be a useful first pass in some ETL development.
If instead of transforming a single object it would output a table of src_field->dst_field, it could potentially be a useful first pass in some ETL development.