lib/hexapdf/document.rb in hexapdf-0.20.4 vs lib/hexapdf/document.rb in hexapdf-0.21.0

@@ -636,10 +636,13 @@
     #
     # The signing handler to be used is determined by the +handler+ argument together with the rest
     # of the keyword arguments (see HexaPDF::Document::Signatures#handler for details).
     #
     # If not changed, the default signing handler is HexaPDF::Document::Signatures::DefaultHandler.
+    #
+    # *Note*: Once signing is done the document cannot be changed anymore since it was written. If a
+    # document needs to be signed multiple times, it needs to be loaded again after writing.
     def sign(file_or_io, handler: :default, signature: nil, write_options: {}, **handler_options)
       handler = signatures.handler(name: handler, **handler_options)
       signatures.add(file_or_io, handler, signature: signature, write_options: write_options)
     end
 
@@ -710,9 +713,13 @@
       if file_or_io.kind_of?(String)
         File.open(file_or_io, 'w+') {|file| Writer.write(self, file, incremental: incremental) }
       else
         Writer.write(self, file_or_io, incremental: incremental)
       end
+    end
+
+    def inspect #:nodoc:
+      "<#{self.class.name}:#{object_id}>"
     end
 
   end
 
 end