[jira] [Commented] (NIFI-3010) Add expression language support for JoltTransformJson processor

["Andrew Grande (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NIFI-3010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15654811#comment-15654811 ] 

Andrew Grande commented on NIFI-3010:
-------------------------------------

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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