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-- F393A00.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.
--*
--
-- FOUNDATION DESCRIPTION:
--      This foundation provides a simple background for a class family
--      based on an abstract type.  It is to be used to test the
--      dispatching of various forms of subprogram defined/inherited and
--      overridden with the abstract type.
--
--  type                       procedures                  functions
--  ----                       ----------                  ---------
--  Object                     Initialize, Swap(abstract)  Create(abstract)
--        Object'Class                                     Initialized
--    Windmill is new Object   Swap, Stop, Add_Spin        Create, Spin
--      Pump is new Windmill   Set_Rate                    Create, Rate
--      Mill is new Windmill   Swap, Stop                  Create
--
-- CHANGE HISTORY:
--      06 Dec 94   SAIC    ACVC 2.0
--
--!
 
package F393A00_0 is
   procedure TC_Touch ( A_Tag : Character );
   procedure TC_Validate( Expected: String; Message: String );
end F393A00_0;
 
with Report;
package body F393A00_0 is
   Expectation : String(1..20);
   Finger      : Natural := 0;
 
   procedure TC_Touch ( A_Tag : Character ) is
   begin
     Finger := Finger+1;
     Expectation(Finger) := A_Tag;
   end TC_Touch;
 
   procedure TC_Validate( Expected: String; Message: String ) is
   begin
     if Expectation(1..Finger) /= Expected then
       Report.Failed( Message & " Expecting: " & Expected 
 			     & " Got: " & Expectation(1..Finger) );
     end if;
     Finger := 0;
   end TC_Validate;
end F393A00_0;
 
----------------------------------------------------------------------
 
package F393A00_1 is
   type Object is abstract tagged private;
   procedure Initialize( An_Object: in out Object );
   function  Initialized( An_Object: Object'Class ) return Boolean;
   procedure Swap( A,B: in out Object ) is abstract;
   function  Create return Object is abstract;
private
   type Object is abstract tagged record
     Initialized : Boolean := False;
   end record;
end F393A00_1;
 
with F393A00_0;
package body F393A00_1 is
   procedure Initialize( An_Object: in out Object ) is
   begin
     An_Object.Initialized := True;
     F393A00_0.TC_Touch('a');
   end Initialize;
 
   function  Initialized( An_Object: Object'Class ) return Boolean is
   begin
     F393A00_0.TC_Touch('b');
     return An_Object.Initialized;
   end Initialized;
end F393A00_1;
 
----------------------------------------------------------------------
 
with F393A00_1;
package F393A00_2 is
 
   type Rotational_Measurement is range -1_000 .. 1_000;
   type Windmill is new F393A00_1.Object with private;
 
   procedure Swap( A,B: in out Windmill );  
 
   function  Create return Windmill;        
 
   procedure Add_Spin( To_Mill : in out Windmill;
 		      RPMs    : in     Rotational_Measurement );
 
   procedure Stop( Mill : in out Windmill );
 
   function  Spin( Mill : Windmill ) return Rotational_Measurement;
 
private
   type Windmill is new F393A00_1.Object with
     record
       Spin : Rotational_Measurement := 0;
     end record;
end F393A00_2;
 
with F393A00_0;
package body F393A00_2 is
 
   procedure Swap( A,B: in out Windmill ) is
     T : constant Windmill := B;
   begin
     F393A00_0.TC_Touch('c');
     B := A;
     A := T;
   end Swap;
 
   function  Create return Windmill is
     A_Mill : Windmill;
   begin
     F393A00_0.TC_Touch('d');
     return A_Mill;
   end Create;
 
   procedure Add_Spin( To_Mill : in out Windmill;
 		      RPMs    : in     Rotational_Measurement ) is
   begin
     F393A00_0.TC_Touch('e');
     To_Mill.Spin := To_Mill.Spin + RPMs;
   end Add_Spin;
 
   procedure Stop( Mill : in out Windmill ) is
   begin
     F393A00_0.TC_Touch('f');
     Mill.Spin := 0;
   end Stop;
 
   function  Spin( Mill : Windmill ) return Rotational_Measurement is
   begin
     F393A00_0.TC_Touch('g');
     return Mill.Spin;
   end Spin;
 
end F393A00_2;
 
----------------------------------------------------------------------
 
with F393A00_2;
package F393A00_3 is
   type Pump is new F393A00_2.Windmill with private;
   function Create return Pump;
 
   type Gallons_Per_Revolution is digits 3;
   procedure Set_Rate( A_Pump: in out Pump; To_Rate: Gallons_Per_Revolution);
   function  Rate( Of_Pump: Pump ) return Gallons_Per_Revolution;
private
   type Pump is new F393A00_2.Windmill with
     record
       GPRPM : Gallons_Per_Revolution := 0.0; -- Gallons/RPM
     end record;
end F393A00_3;
 
with F393A00_0;
package body F393A00_3 is
   function Create return Pump is
     Sump : Pump;
   begin
     F393A00_0.TC_Touch('h');
     return Sump;
   end Create;
 
   procedure Set_Rate( A_Pump: in out Pump; To_Rate: Gallons_Per_Revolution)
   is
   begin
     F393A00_0.TC_Touch('i');
     A_Pump.GPRPM := To_Rate;
   end Set_Rate;
 
   function  Rate( Of_Pump: Pump ) return Gallons_Per_Revolution is
   begin
     F393A00_0.TC_Touch('j');
     return Of_Pump.GPRPM;
   end Rate;
end F393A00_3;
 
----------------------------------------------------------------------

with F393A00_2;
with F393A00_3;
package F393A00_4 is
   type Mill is new F393A00_2.Windmill with private;
 
   procedure Swap( A,B: in out Mill );
   function  Create return Mill;
   procedure Stop( It: in out Mill );
 private
   type Mill is new F393A00_2.Windmill with
     record
       Pump: F393A00_3.Pump := F393A00_3.Create;
     end record;
end F393A00_4;
 
with F393A00_0;
package body F393A00_4 is
   procedure Swap( A,B: in out Mill ) is
     T: constant Mill := A;
   begin
     F393A00_0.TC_Touch('k');
     A := B;
     B := T;
   end Swap;
 
   function  Create return Mill is
     A_Mill : Mill;
   begin
     F393A00_0.TC_Touch('l');
     return A_Mill;
   end Create;
 
   procedure Stop( It: in out Mill ) is
   begin
     F393A00_0.TC_Touch('m');
     F393A00_3.Stop( It.Pump ); 
     F393A00_2.Stop( F393A00_2.Windmill( It ) ); 
   end Stop;
end F393A00_4;