Saxon

Well, it looks like you're supplying JSON to an API that expects XML (specifically, a SAXSource). How are you running the XPath evaluation (what API calls are you making?)

Hi Michael,

As mentioned above we are using Camel and corresponding tag is as below.

<camel:xpath documentType="javax.xml.transform.sax.SAXSource" factoryRef="saxonEEXpathFactory" resultType="java.lang.String">apply(concat#3, ["a", "b", "c"])</camel:xpath>

-Trinath.

Thanks. I'm afraid we're not familiar with Camel and I've no idea how Camel will interpret this in terms of calling the Saxon API underneath.

The information given at https://wiki.apache.org/confluence/display/CAMEL/XPath is very XML-oriented and suggests that Camel is using the JAXP API javax.xml.xpath.XPathFactory which of course hasn't been updated since XPath 1.0 and is therefore entirely focused on querying XML.

Unless someone who knows Camel can suggest another way of doing this, you may be out of luck. We can help you using XPath to query JSON at the level of telling you how to use the Java API, but only the Camel support people can tell you whether it's possible within Camel.

Or perhaps you can find a way to wrap the JSON payload in an XML wrapper and pass that to the Camel API? If you can do that, XPath 3.1 is quite capable of parsing the JSON within the wrapper and then querying it.