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https://issues.apache.org/jira/browse/NIFI-3010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15654811#comment-15654811
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Andrew Grande commented on NIFI-3010:
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Hi, here's the use case we'd like the transformer to support in simpler terms.
* FlowFile content is a JSON document
* JOLT transformer runs a spec to shape it into another JSON structure
* JOLT specification has some expression to reference the *FlowFile* attribute
and value, which is made part of the JSON structure. I.e. we are 'merging in'
the contextual information from FF with the JSON while still treating
everything as a structured document.
> Add expression language support for JoltTransformJson processor
> ---------------------------------------------------------------
>
> Key: NIFI-3010
> URL: https://issues.apache.org/jira/browse/NIFI-3010
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Affects Versions: 1.0.0
> Reporter: Yolanda M. Davis
>
> Provide the ability to incorporate expression language within a Jolt
> Specification so that certain operations, such as dynamic creation of
> key/value pairs can be achieved.
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