-- File:	Storage_CallBack.cdl
-- Created:	Thu Feb 27 17:58:37 1997
-- Author:	Christophe LEYNADIER
--		<cle@parigox.paris1.matra-dtv.fr>
---Copyright:	 Matra Datavision 1997

deferred class CallBack from Storage

inherits TShared from MMgt

uses Schema from Storage,
     BaseDriver from Storage
     
is
   New(me) returns mutable Persistent is deferred;
   
   Add(me; aPers : Persistent from Standard; aSchema : Schema from Storage) is deferred;
   
   Write(me; aPers : Persistent from Standard; aDriver : in out BaseDriver from Storage; aSchema : Schema from Storage) is deferred;
   
   Read(me; aPers : mutable Persistent from Standard; aDriver : in out BaseDriver from Storage; aSchema : Schema from Storage) is deferred;
   
end;