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-- C3900051.A

--

--                             Grant of Unlimited Rights

--

--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,

--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained

--     unlimited rights in the software and documentation contained herein.

--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making

--     this public release, the Government intends to confer upon all

--     recipients unlimited rights  equal to those held by the Government.

--     These rights include rights to use, duplicate, release or disclose the

--     released technical data and computer software in whole or in part, in

--     any manner and for any purpose whatsoever, and to have or permit others

--     to do so.

--

--                                    DISCLAIMER

--

--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR

--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED

--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE

--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE

--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A

--     PARTICULAR PURPOSE OF SAID MATERIAL.

--*

--

-- OBJECTIVE:

--      See C3900053.AM.

--

-- TEST DESCRIPTION:

--      See C3900053.AM.

--

-- TEST FILES:

--      This test consists of the following files:

--

--         C3900050.A

--      => C3900051.A

--         C3900052.A

--         C3900053.AM

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--      15 May 96   SAIC    ACVC 2.1: Modified prologue. Added pragma Elaborate

--                          for Ada.Calendar.

--

--!

with C3900050;       -- Alert system abstraction.

package C3900051 is  -- Extended alert system abstraction.

   type Low_Alert_Type is new C3900050.Alert_Type

     with private;                                      -- Private extension of

                                                        -- root tagged type.

   -- Inherits procedure Display from Alert_Type.

   procedure Handle (LA : in out Low_Alert_Type);       -- Override parent's

                                                        -- primitive subprog.

   procedure Set_Level (LA : in out Low_Alert_Type;     -- To be inherited by

                        L  : in     Integer);           -- all derivatives.

   -- The following functions are needed to verify the values of the

   -- extension's private components.

   function Get_Level (LA: Low_Alert_Type) return Integer;

   function Initial_Values_Okay (LA : in Low_Alert_Type)

     return Boolean;                                    -- Override parent's

                                                        -- primitive subprog.

   function Bad_Final_Values (LA : in Low_Alert_Type)   -- Override parent's

     return Boolean;                                    -- primitive subprog.

private

   type Low_Alert_Type is new C3900050.Alert_Type with record

      Level : Integer := 0;

   end record;

end C3900051;

     --==================================================================--

with Ada.Calendar;

pragma Elaborate (Ada.Calendar);

package body C3900051 is  -- Extended alert system abstraction.

   use C3900050;  -- Alert system abstraction.

   procedure Set_Level (LA : in out Low_Alert_Type;

                        L  : in     Integer) is

   begin

      LA.Level := L;

   end Set_Level;

   procedure Handle (LA : in out Low_Alert_Type) is

   begin

      Handle (Alert_Type (LA));   -- Call parent's operation (type conversion).

      Set_Level (LA, 1);          -- Call newly declared operation.

      Set_Display (Alert_Type(LA),

                   Teletype);     -- Call parent's operation (type conversion).

      Display (LA);

   end Handle;

   function Get_Level (LA: Low_Alert_Type) return Integer is

   begin

      return LA.Level;

   end Get_Level;

   function Initial_Values_Okay (LA : in Low_Alert_Type) return Boolean is

   begin

      -- Call parent's operation (type conversion).

      return (Initial_Values_Okay (Alert_Type (LA)) and

              LA.Level = 0);

   end Initial_Values_Okay;

   function Bad_Final_Values (LA : in Low_Alert_Type) return Boolean is

      use type Ada.Calendar.Time;

   begin

      return (Get_Time(LA)    /= Alert_Time or

              Get_Display(LA) /= Teletype or

              LA.Level        /= 1);

   end Bad_Final_Values;

end C3900051;