In the documentation there is an example mentioned to prefill an AEM Form via a service.
There is mentioned to open a java file for editing. But the Java file is not included in the boilerplate package zip. Or is the Java file from somewhere else?
Adobe Experience Manager Help | Prefill adaptive form fields
Christofhe De Bock
I put an example here too Prepopulate logged in user using prefill service in adaptive form
Someone else was looking for this, does the below help:
Create and run a prefill service, sample boilerplate project download link is missing