Use #text on JSON to convert on XML using Json.org

I'm converting a json string into a XML by using json.org, everything is ok about this because I know how to use the library but I have a problem, I'd like to be able to convert from JSON to XML something like this:

XML:

<ocs:price exponent="-1">2</ocs:price>

JSON:

"ocs:price": {
            "-exponent": "-1",
            "#text": "2"
          }

If I use json.org with this I'm getting the following when I have everything converted to XML:

<ocs:price>
   <#text>2</#text>
   <exponent>-1</exponent>
</ocs:price>

That's not what I'm looking for, How could convert <ocs:price exponent="-1">2</ocs:price> into a JSON value string for JSON.org library?

Regards.