How do I process FDF files created by the Acrobat Forms plug-in?
Created May 7, 2012
Arun Bharathan [ The files are uploaded with content type = application/vnd.fdf ]
There are some caveats at the site. Read it first before jumping in.
To update/complete or recover data from a FDF you need adobe java classes which are JNI for Adobe DLLs.
I think it is available in Abobe's site
And as for running it in VisualAge, you need FDFtk.jar file and the JfdfTk.DLL in the VAJ's classpath.