----------------------------------------------
----------------------------------
--                                                                          --
--                           OCARINA COMPONENTS                             --
--                                                                          --
--                   O C A R I N A . D I A . P A R S E R                    --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--               Copyright (C) 2005-2006, GET-Telecom Paris.                --
--                                                                          --
-- Ocarina  is free software;  you  can  redistribute  it and/or  modify    --
-- it under terms of the GNU General Public License as published by the     --
-- Free Software Foundation; either version 2, or (at your option) any      --
-- later version. Ocarina is distributed  in  the  hope  that it will be    --
-- useful, but WITHOUT ANY WARRANTY;  without even the implied warranty of  --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General --
-- Public License for more details. You should have received  a copy of the --
-- GNU General Public License distributed with Ocarina; see file COPYING.   --
-- If not, write to the Free Software Foundation, 51 Franklin Street, Fifth --
-- Floor, Boston, MA 02111-1301, USA.                                       --
--                                                                          --
-- As a special exception,  if other files  instantiate  generics from this --
-- unit, or you link  this unit with other files  to produce an executable, --
-- this  unit  does not  by itself cause  the resulting  executable to be   --
-- covered  by the  GNU  General  Public  License. This exception does not  --
-- however invalidate  any other reasons why the executable file might be   --
-- covered by the GNU Public License.                                       --
--                                                                          --
--                 Ocarina is maintained by the Ocarina team                --
--                       (ocarina-users@listes.enst.fr)                     --
--                                                                          --
------------------------------------------------------------------------------

--  This package contains the top-level procedures to convert the XML/Dia file
--  into a abstract syntax tree

with Ada.Text_IO;        use Ada.Text_IO;
with Input_Sources.File;
with DOM.Readers;
with DOM.Core;
with DOM.Core.Documents;

with Ocarina.Dia.Parser.Core;
with Ocarina.Dia.Parser.Core.Diagram;
with Ocarina.Dia.Parser.Translate;
with Ocarina.Parser;

package body Ocarina.Dia.Parser is

   ----------
   -- Init --
   ----------

   procedure Init is
   begin
      Ocarina.Parser.Register_Parser (".dia", Process'Access);
   end Init;

   --  Parse the file File_Name and return the Node_Id or the root of
   --  the resulting AADL tree, or No_Node if the parsing failed. If
   --  AADL_Root is not No_Node, then return itself, as it is the tree
   --  root.
   function Process
     (File_Name : String;
      AADL_Root : Types.Node_Id)
      return      Node_Id
   is
      use DOM.Core;
      use Ocarina.Dia.Parser.Core.Diagram;

      pragma Unreferenced (AADL_Root);

      F : Input_Sources.File.File_Input;
      T : DOM.Readers.Tree_Reader;
      R : Types.Node_Id;
   begin
      --  Open file
      Put_Line ("Opening file : " & File_Name);
      Input_Sources.File.Open (File_Name, F);
      Put_Line ("Parsing file with DOM...");
      DOM.Readers.Parse (T, F);

      Put_Line ("Processing Diagram objects...");

      declare
         use Ocarina.Dia.Parser.Core;
         use Ocarina.Dia.Parser.Translate;

         D    : constant Document                          :=
            DOM.Readers.Get_Tree (T);
         Root : constant Element                           :=
            Documents.Get_Element (D);
         NL   : constant Ocarina.Dia.Parser.Core.Node_List :=
            Process_Diagram (Root);

      begin
         --  Put_Line ("Printing nodes :");
         --  for I in 0 .. (Length (NL) - 1) loop
         --     Print_Node (Item (NL, I));
         --  end loop;

         --  Translate from the internal representation to the Ocarina
         --  Core Internal Tree

         Put_Line ("Translating to the internal tree");
         R := Ocarina.Dia.Parser.Translate.Translate (NL);
      end;

      Put_Line ("Freeing Memory");
      DOM.Readers.Free (T);

      Put_Line ("Closing input file");
      Input_Sources.File.Close (F);

      return R;
   end Process;

end Ocarina.Dia.Parser;