Mark Payne created NIFI-12456:
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Summary: Improve leniency of JSON readers and flexibility of JSON
Writer
Key: NIFI-12456
URL: https://issues.apache.org/jira/browse/NIFI-12456
Project: Apache NiFi
Issue Type: Improvement
Components: Extensions
Reporter: Mark Payne
Currently, we adhere to the JSON specification fairly strictly, with the
exception of allowing for "JSON Lines" / ndjson / ldjson.
However, the Jackson library allows for several {{Features}} that we do not
expose, which may be helpful for handling data that does not strictly adhere to
the schema, or where there are preferences in serialization.
For example, {{JsonParser.Feature}} allows for the ability to allow comments in
JSON (to include lines beginning with {{{}//{}}}, {{{}/*{}}}, and "YAML Style"
comments (#)). Additionally, it allows for single-quotes for field names or no
quoting at all. While these do not adhere to the specification, they are common
enough for the parser to support them, and we should do.
Similarly, on the serialization side, we have had requests to support writing
decimal values without use of scientific notation, which can be achieved by
enabling the {{WRITE_BIGDECIMAL_AS_PLAIN}} feature.
We should expose these options on the JsonTreeReader and the JSON Writer. I
don't know of any downside to enabling the leniency / non-standard options, so
it probably makes sense to simply enable them all by default. Though there is
argument for introducing a new "Parsing Leniency" option that allows the user
to disable these features.
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