------------------------------------------------------------------------------
--                                                                          --
--                           POLYORB COMPONENTS                             --
--                                                                          --
--                POLYORB.GIOP_P.TAGGED_COMPONENTS.POLICIES                 --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--         Copyright (C) 2003-2007, Free Software Foundation, Inc.          --
--                                                                          --
-- PolyORB 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. PolyORB is distributed  in the hope that it will be  useful,    --
-- but WITHOUT ANY WARRANTY;  without even the implied warranty of MERCHAN- --
-- TABILITY 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 PolyORB; see file COPYING. If    --
-- not, write to the Free Software Foundation, 51 Franklin Street, Fifth    --
-- Floor, Boston, MA 02111-1301, USA.                                       --
--                                                                          --
--                                                                          --
--                  PolyORB is maintained by AdaCore                        --
--                     (email: sales@adacore.com)                           --
--                                                                          --
------------------------------------------------------------------------------

--  TAG_POLICIES tagged component

with PolyORB.Representations.CDR.Common;
with PolyORB.Types;
with PolyORB.Utils.Chained_Lists;

package PolyORB.GIOP_P.Tagged_Components.Policies is

   use PolyORB.GIOP_P.Tagged_Components;

   type TC_Policies is new Tagged_Component
     (Tag => Tag_Policies, At_Most_Once => True) with private;
   --  Note: the at-most-once semantics of this component is not
   --  specified in the CORBA specification, par. 22.3.2, use default
   --  value.

   procedure Marshall_Component_Data
     (C : access TC_Policies; Buffer : access Buffer_Type);

   procedure Unmarshall_Component_Data
     (C      : access TC_Policies;
      Buffer : access Buffer_Type;
      Error  : out PolyORB.Errors.Error_Container);

   procedure Release_Contents (C : access TC_Policies);

   function Duplicate (C : TC_Policies) return Tagged_Component_Access;

private

   type Encapsulation_Access is access all
     PolyORB.Representations.CDR.Common.Encapsulation;

   type Policy_Value is record
      P_Type  : PolyORB.Types.Unsigned_Long;
      P_Value : Encapsulation_Access;
   end record;

   Invalid_Policy_Type : constant := PolyORB.Types.Unsigned_Long'Last;

   type Fetch_Sub_Component_Func_Access is access
     function (Oid : access PolyORB.Objects.Object_Id) return Policy_Value;

   procedure Register (Fetch_Sub_Component : Fetch_Sub_Component_Func_Access);
   --  Register an allocator for a TAG_POLICIES sub component

   package Policy_Value_Seq is new PolyORB.Utils.Chained_Lists (Policy_Value);
   --  Implementation Note: CORBA/GIOP defines Policy_Value_Seq as an
   --  unbounded sequence. We implement it using as a chain list to
   --  avoid dragging unbounded sequences, which is unneeded.

   type TC_Policies is new Tagged_Component
     (Tag => Tag_Policies, At_Most_Once => True)
     with record
        Policies : Policy_Value_Seq.List;
     end record;

end PolyORB.GIOP_P.Tagged_Components.Policies;
