JSONPath Expression in wso2 esb

I have a json payload that looks like below:

{
   "orders" : {
    "order.id" : 1024,
    "order.name" : "Ruffled-top"
}
}

I need to fetch order.id and order.name. Dot notation of JSONpath expression anyways won't work here. So I tried bracket notation like:

<property name="order-id" expression="json-eval($[orders][order.id])"/>

But the bracket notation is not working in wso2. Is there any other way this can be achieved? Thanks in advance.

You need to have order.id surrounded by '' inside the []. To access the orders object you can use the dot notation as well.

<property expression="json-eval($.orders.['order.id'])" name="order-id" scope="default" type="STRING"/>

or

<property expression="json-eval($['orders']['order.id'])" name="order-id" scope="default" type="STRING"/>