c3900052.a

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-- C3900052.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 C3900051;       -- Extended alert system abstraction.
package C3900052 is  -- Further extended alert system abstraction.


   -- Declarations used by component Action_Officer;

   type Person_Enum is (Nobody,          Duty_Officer,
                        Watch_Commander, Commanding_Officer);


   type Medium_Alert_Type is new C3900051.Low_Alert_Type
     with private;                                      -- Private extension of
                                                        -- private extension.

   -- Inherits (inherited) procedure Display from Low_Alert_Type.
   -- Inherits function Level_Of from Low_Alert_Type.

   procedure Handle (MA : in out Medium_Alert_Type);    -- Override parent's
                                                        -- primitive subprog.

   procedure Assign_Officer (MA : in out Medium_Alert_Type;
                             To : in     Person_Enum);


   -- The following functions are needed to verify the values of the
   -- extension's private components.

   function Initial_Values_Okay (MA : in Medium_Alert_Type)
     return Boolean;                                    -- Override parent's
                                                        -- primitive subprog.

   function Bad_Final_Values (MA: in Medium_Alert_Type) -- Override parent's
     return Boolean;                                    -- primitive subprog.

private

   type Medium_Alert_Type is new C3900051.Low_Alert_Type with record
      Action_Officer : Person_Enum := Nobody;
   end record;

end C3900052;


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


with C3900050;            -- Basic alert abstraction.
with Ada.Calendar;
pragma Elaborate (Ada.Calendar);

package body C3900052 is  -- Further extended alert system abstraction.

   use C3900050;  -- Enumeration values directly visible.
   use C3900051;  -- Extended alert system abstraction.


   procedure Assign_Officer (MA : in out Medium_Alert_Type;
                             To : in     Person_Enum) is
   begin
      MA.Action_Officer := To;
   end Assign_Officer;


   procedure Handle (MA : in out Medium_Alert_Type) is
   begin
      Handle (Low_Alert_Type (MA));      -- Call parent's op (type conversion).
      Set_Level (MA, 2);                 -- Call inherited operation.
      Assign_Officer (MA, Duty_Officer); -- Call newly declared operation.
      Set_Display (MA, Console);         -- Call inherited operation.
      Display (MA);                      -- Call doubly inherited operation.
   end Handle;


   function Initial_Values_Okay (MA : in Medium_Alert_Type) return Boolean is
   begin
      -- Call parent's operation (type conversion).
      return (Initial_Values_Okay (Low_Alert_Type (MA)) and
              MA.Action_Officer = Nobody);
   end Initial_Values_Okay;


   function Bad_Final_Values (MA : in Medium_Alert_Type) return Boolean is
      use type Ada.Calendar.Time;
   begin
      return (Get_Time(MA)      /= Alert_Time or
              Get_Display(MA)   /= Console    or
              Get_Level(MA)     /= 2          or
              MA.Action_Officer /= Duty_Officer);
   end Bad_Final_Values;


end C3900052;