Convert JSON to Parquet directly

In order to convert JSON payload to Parquet, the "established" way seems to be to go first through a JSON to Avro conversion, provided the JSON payload is covered by a JSON-Schema or part of a OpenAPI definition. The rest of the process relies on the parquet-avro implementation.

Since JSON payload can be loaded to a generic JsonNode (jackson library) and since a JSON payload can be described and checked against a JSON-Schema or an OpenAPI definition, wouldn't it be theoretically possible to convert a JSON payload to a Parquet "record" directly (somehow implementing a similar approach than parquet-avro but this a JsonNode as a data holder)?

**Reporter**: [Emmanuel Brard](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=ebrard) / @ebrard

_{**Note**: *This issue was originally created as [PARQUET-1880](https://issues.apache.org/jira/browse/PARQUET-1880). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Beginne mit der Überprüfung der bestehenden parquet-avro-Implementierung und damit, wie Jackson JsonNode JSON darstellt und anhand von JSON-Schema- oder OpenAPI-Definitionen validiert. Lege den Umfang und das Design für die direkte Erstellung eines Parquet-Datensatzes aus JSON fest, einschließlich dessen, was eine vollständige Konvertierung ausmacht.

Vom Indexierungsmodell aus dem Issue-Text verfasst.