In one of my wizard's steps I have a upload form and a textarea. The textarea is used to enter serial numbers(seperated by newline) and is connected to a object property of type Set<String> using a propertymodel. I've written a custom converter to turn the entered input to a Set<String> and from a Set<String> back to simple string.
When pressing the wizard's next the input is validated and if valid the backing model will have Set<String> of serials. I want the upload form to be used to upload a file containing serial numbers. I would like that the content of the uploaded file will be placed into the textarea, so that when Next is pressed again it is validated. Is this possible? Can I put the file's content into the text area by pressing upload without ruining the property model the textarea uses?
