------------------------------------------------------------------------------
-- --
-- Matreshka Project --
-- --
-- Localization, Internationalization, Globalization for Ada --
-- --
-- Runtime Library Component --
-- --
------------------------------------------------------------------------------
-- --
-- Copyright © 2011, Vadim Godunko <vgodunko@gmail.com> --
-- All rights reserved. --
-- --
-- Redistribution and use in source and binary forms, with or without --
-- modification, are permitted provided that the following conditions --
-- are met: --
-- --
-- * Redistributions of source code must retain the above copyright --
-- notice, this list of conditions and the following disclaimer. --
-- --
-- * Redistributions in binary form must reproduce the above copyright --
-- notice, this list of conditions and the following disclaimer in the --
-- documentation and/or other materials provided with the distribution. --
-- --
-- * Neither the name of the Vadim Godunko, IE nor the names of its --
-- contributors may be used to endorse or promote products derived from --
-- this software without specific prior written permission. --
-- --
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS --
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT --
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR --
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT --
-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, --
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED --
-- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR --
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF --
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING --
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS --
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --
-- --
------------------------------------------------------------------------------
-- $Revision: 1793 $ $Date: 2011-06-11 11:40:44 +0400 (Сб, 11 июн 2011) $
------------------------------------------------------------------------------
-- This package provides proxy settings storage which implements fallbacks
-- mechanism on top of several underling settings storages.
------------------------------------------------------------------------------
private with Ada.Containers.Vectors;
package Matreshka.Internals.Settings.Fallbacks is
type Fallback_Settings is new Abstract_Settings with private;
function Create
(Manager : not null access Abstract_Manager'Class)
return not null Settings_Access;
-- Creates fallbacks proxy.
procedure Add
(Self : not null access Fallback_Settings'Class;
Storage : not null Settings_Access);
-- Adds specified settings storage to be used to retrieve settings. First
-- added storage is used to modify settings also.
private
package Vectors is
new Ada.Containers.Vectors (Positive, Settings_Access);
type Fallback_Settings is new Abstract_Settings with record
Storages : Vectors.Vector;
end record;
overriding function Contains
(Self : Fallback_Settings;
Key : League.Strings.Universal_String) return Boolean;
overriding procedure Finalize
(Self : not null access Fallback_Settings);
overriding function Name
(Self : not null access Fallback_Settings)
return League.Strings.Universal_String;
-- Returns name of the first underling settings storage.
overriding procedure Remove
(Self : in out Fallback_Settings;
Key : League.Strings.Universal_String);
overriding procedure Set_Value
(Self : in out Fallback_Settings;
Key : League.Strings.Universal_String;
Value : League.Holders.Holder);
overriding procedure Sync (Self : in out Fallback_Settings);
overriding function Value
(Self : Fallback_Settings;
Key : League.Strings.Universal_String)
return League.Holders.Holder;
end Matreshka.Internals.Settings.Fallbacks;