How do you retrieve the value?

Question

Hi There,
XML request is:
<?xml version="1.0" encoding="utf-8"?>
<payload>
  <region>
    <__type>Category:#Test.XYZ.Framework.Categorization</__type>
    <Extension></Extension>
    <Id></Id>
    <Name>
      <en></en>   
    </Name>   
  </region>
</payload>
I did an XML to JSON conversion on the above and stored the value of "en" node under "Name" in an attribute named "payload.region.Name.en" by extracting using JSON path filter - using "$.payload.region.Name.en".
But, when I print the value of the attribute, it is printing as "null". Any idea why? I was expecting "" as I do not want the string null to be send as the value for "en".
Regards,
ET

Answer 1

Hi,
The XML to JSON filter does actually converty empty value into the string "null" in the JSON and when you read it out with the path it actually reads the string "null". It does look a bit flawed in my opinion and I recommend creating a support case for it..
But a solution for you!
Create a script filter (JavaScript) after you have read the parameter and do this:
function invoke(msg)
    var att = msg.get("payload.region.Name.en");
   if (att == "null") {
      msg.put("payload.region.Name.en", "");
    return true;
It will just replace null with an empty string!
Cheers,
Stefan