xfa_stuff.rb

require 'java'
require 'itextpdf-5.2.0.jar'
require 'itext-xtra-5.2.0.jar'

java_import java.io.FileOutputStream

java_import com.itextpdf.text.pdf.PdfReader
java_import com.itextpdf.text.pdf.AcroFields
java_import com.itextpdf.text.pdf.XfaForm
java_import com.itextpdf.text.pdf.PdfStamper

def is_xfa_form?(file)
  reader = PdfReader.new(file)
  xfa = reader.getAcroFields.getXfa
  xfa.isXfaPresent
end

def get_fields(file)
  reader = PdfReader.new(file)
  fos = FileOutputStream.new('/tmp/durka')
  stamper = PdfStamper.new(reader, fos)
  stamper.getAcroFields
end