OIC file reading/mapping help

Summary

How to map lines to header and lines

Content

Hi,

I am hoping this common use-case is quite simple but I am relatively new to OIC.

Use-Case:

Source system sends a CSV file of AR Invoice lines.  Each invoice can have one or more lines. I want to make a call per invoice to the AR Create Simple Invoice Service

I understand I need to do the following:

Get file from FTP server

Loop through each line of the file

Build the payload

Make a SOAP call

This is where I have a problem - I only want to make a call to the SOAP service for each invoice, not for each line of the file.