Mirth -> HL7 into XML conversion Ques - mirth

Question

I'm new to the Mirth Connect When I tried to convert HL7 into XML I 'm struggling.Suppose my HL7 messages have repeat segments like ORC in ORM Messages how to iterate that.
below is my code:
tmp['Messages']['orderList']['order'][count]['provider']=msg['ORC'][count]['ORC.10']['ORC.10.1'].toString();
but it is throwing an error:
`TypeError: Cannot read property "provider"` from undefined.
please help me to proceed further.

Answer 1

It's failing because your count is higher than the number of elements returned by tmp['Messages']['orderList']['order'], so it is returning undefined. The short answer is that you need to add another order node to tmp['Messages']['orderList'] before you can access it. It's hard to say how best to do that without seeing more of your code, requirements, outbound template, etc... Most frequently I build the node first, and then use appendChild to add it.
A simple example would be:
var tmp = <xml>
<Messages>
<orderList />
</Messages>
</xml>;
var prov = 12345;
var nextOrder = <order>
<provider>{prov}</provider>
</order>;
tmp.Messages.orderList.appendChild(nextOrder);
After which, tmp will look like:
<xml>
<Messages>
<orderList>
<order>
<provider>12345</provider>
</order>
</orderList>
</Messages>
</xml>
The technology you are using to work with xml is called e4x, and it's running on the Mozilla Rhino Javascript engine. Here are a couple resources that might help you.
https://web.archive.org/web/20181120184304/https://wso2.com/project/mashup/0.2/docs/e4xquickstart.html
https://developer.mozilla.org/en-US/docs/Archive/Web/E4X/Processing_XML_with_E4X