Preserving the parent element in XML document with XMLReader

[#1]

When using the XMLReader service, how do you retain the outermost parent element of an XML document so when I convert it to JSON I have the outermost element in the JSON version too?

For example, given the following XML document how do I capture the "<a>" element rather than just the "<b>" element?  

<a>
  <b>45</b>
</a>

What I want:

{"a": {"b":45}}

What I get:

{"b":45}

[#2 · Accepted solution]

@ChuckE ,

You can use a JoltTransformRecord processor to perform the conversion to JSON and, at the same time, add the root node back to it.

The JOLT specification I used is this:

{
  "*": "a.&"
}

Cheers,

André

[#3]

I create an XMLRecordSetWriter in the Controller Services, then using a ConvertRecord processor I'm able to read the xml record and then immediately write it out with a new root tag, which I can then pass to my next processor.  I discovered this when I was reading the documentation for the XMLRecordSetWriter.  Very first line in the documentation. 😃

https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-record-serialization-services...

[#4]

Ahh! Good catch, @ChuckE !! So simple!