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https://issues.apache.org/jira/browse/NIFI-9862?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Handermann resolved NIFI-9862.
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Fix Version/s: 1.17.0
1.16.1
Resolution: Fixed
> Update JsonTreeReader to read Records from a Nested Array
> ---------------------------------------------------------
>
> Key: NIFI-9862
> URL: https://issues.apache.org/jira/browse/NIFI-9862
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Extensions
> Reporter: David Handermann
> Assignee: Lehel Boér
> Priority: Minor
> Fix For: 1.17.0, 1.16.1
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> The {{JsonTreeReader}} leverages the Jackson JSON streaming API to read one
> or more records from an {{{}InputStream{}}}. The supporting {{RecordReader}}
> implementation expects input JSON to be formatted with the an array as the
> root element, or an object containing the entire Record. This approach
> supports streamed reading of JSON objects contained within an array as the
> root element, but does not support streaming of JSON objects contained within
> an array nested inside a wrapping root object.
> Some services provide JSON responses that include multiple records in a
> wrapping root object as follows:
> {noformat}
> {
> "total": 2,
> "records": [
> {
> "id": 1
> },
> {
> "id": 2
> }
> ]
> }
> {noformat}
> In order to enable streamed processing of nested records, the
> {{JsonTreeReader}} should be updated to support an optional property defining
> the Property Name of a nested field containing records.
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