Mirth, transform a simple tag value of inbound xml file

Question

I would like to use mirth in the following scenario: 1. Receive a xml file 2. Change value of a tag if this tag has a specific value 3. Outbound the resulting xml

So i've in mirth a filereader inbound connector and a filewriter outbound connector. How can i transform this xml:

<?xml version="1.0" encoding="ISO-8859-1" ?>
<R>
  <NDOSM />
  <NADM>20060552</NADM>
  <DATECONS>20200205</DATECONS>
  <PRODNR />
  <PRODUCTID>1602235</PRODUCTID>
  <PRODUCTDESC>relaxine compr. pellic. 500 mg</PRODUCTDESC>
  <QTY>1.0</QTY>
  <PARSTOCKID>ethilog</PARSTOCKID>
  <PRIX />
  <STUPNR />
  <MEDNR>16822372</MEDNR>
  <CODEIDENTIFICATION />
  <SERIALNO />
  <NOMARGE />
  <PATIENTNAME>CLINT</PATIENTNAME>
  <PATIENTLASTNAME>EASTWOOD</PATIENTLASTNAME>
  <DATEOFBIRTH>19420910</DATEOFBIRTH>
  <LOTNR />
  <SERVICE />
  <SERVICEDIST>160</SERVICEDIST>
  <KEYFROMPM>20200205163309_05604132</KEYFROMPM>
  <TYPEMOUVEMENT>PREDISPOSITION</TYPEMOUVEMENT>
  <ANNULATION>N</ANNULATION>
  <PARSTOCKID-DOTATION />
  <COMMENTAIREMVT />
</R>

in this one

<?xml version="1.0" encoding="ISO-8859-1" ?>
<R>
  <NDOSM />
  <NADM>20060552</NADM>
  <DATECONS>20200205</DATECONS>
  <PRODNR />
  <PRODUCTID>1602235</PRODUCTID>
  <PRODUCTDESC>relaxine compr. pellic. 500 mg</PRODUCTDESC>
  <QTY>1.0</QTY>
  <PARSTOCKID>51</PARSTOCKID>
  <PRIX />
  <STUPNR />
  <MEDNR>16822372</MEDNR>
  <CODEIDENTIFICATION />
  <SERIALNO />
  <NOMARGE />
  <PATIENTNAME>CLINT</PATIENTNAME>
  <PATIENTLASTNAME>EASTWOOD</PATIENTLASTNAME>
  <DATEOFBIRTH>19420910</DATEOFBIRTH>
  <LOTNR />
  <SERVICE />
  <SERVICEDIST>160</SERVICEDIST>
  <KEYFROMPM>20200205163309_05604132</KEYFROMPM>
  <TYPEMOUVEMENT>PREDISPOSITION</TYPEMOUVEMENT>
  <ANNULATION>N</ANNULATION>
  <PARSTOCKID-DOTATION />
  <COMMENTAIREMVT />
</R>

I must change inbound xml only if value of tag PARSTOCKID is ethilog. In this case, i've to replace ethilog by 51. I've tried a couple of thing without success :(

Thanks

Answer 1

This is pretty straightforward to do with a javascript step in mirth.

if (msg.PARSTOCKID.toString() == 'ethilog') {
    msg.PARSTOCKID = '51';
}