lib/libis/format/converter/pdf_converter.rb in libis-format-0.9.22 vs lib/libis/format/converter/pdf_converter.rb in libis-format-0.9.23

@@ -11,14 +11,15 @@
   module Format
     module Converter
 
       class PdfConverter < Libis::Format::Converter::Base
 
-        def self.input_types(_ = nil)
+        def self.input_types
           [:PDF]
         end
 
-        def self.output_types(_ = nil)
+        def self.output_types(format = nil)
+          return [] unless input_types.include?(format)
           [:PDF, :PDFA]
         end
 
         def pdf_convert(_)
           #force usage of this converter