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109 | ------------------------------------------------------------------------------
-- --
-- Matreshka Project --
-- --
-- SQL Database Access --
-- --
-- Runtime Library Component --
-- --
------------------------------------------------------------------------------
-- --
-- Copyright © 2012, 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: 3381 $ $Date: 2012-11-11 16:41:14 +0400 (Вс, 11 ноя 2012) $
------------------------------------------------------------------------------
-- Plugin interface for Oracle database.
------------------------------------------------------------------------------
with System.Storage_Elements;
with SQL.Databases;
package Matreshka.Internals.SQL_Drivers.Oracle.Plug_In is
type Control_Side is (Driver, Plug_In);
type Column_Description is record
Column_Type : aliased Data_Type; -- OCI_ATTR_DATA_TYPE
Size : aliased Ub2; -- OCI_ATTR_DATA_SIZE
Precision : aliased Sb2; -- OCI_ATTR_PRECISION
Scale : aliased Sb1; -- OCI_ATTR_SCALE
end record;
type Abstract_Plug_In is abstract tagged private;
not overriding procedure Check_Parameter
(Self : Abstract_Plug_In;
Holder : League.Holders.Holder;
Control : in out Control_Side;
SQLT_Type : out Data_Type;
Extra_Size : out System.Storage_Elements.Storage_Count) is abstract;
-- If given plugin supports given Holder as statement parameter
-- set Control to Plug_In, SQLT_Type to expected data type and Extra_Size
-- to size of binding area
not overriding procedure Check_Column
(Self : Abstract_Plug_In;
Column : Column_Description;
Control : in out Control_Side;
SQLT_Type : out Data_Type;
Extra_Size : out System.Storage_Elements.Storage_Count) is abstract;
-- If given plugin supports Column set Control to Plug_In and Extra_Size
-- to size of define area
not overriding procedure Encode
(Self : Abstract_Plug_In;
Holder : League.Holders.Holder;
Buffer : in out System.Storage_Elements.Storage_Array) is abstract;
-- Convert Holder to Storage_Array
not overriding procedure Decode
(Self : Abstract_Plug_In;
Holder : in out League.Holders.Holder;
Buffer : System.Storage_Elements.Storage_Array) is abstract;
-- Convert Storage_Array to Holder
procedure Register
(Database : in out SQL.Databases.SQL_Database;
Plug_In : access Abstract_Plug_In'Class);
-- register plugin in given Database
function Next
(Self : Abstract_Plug_In'Class)
return access Abstract_Plug_In'Class;
-- To iterate over registered plugins
private
type Abstract_Plug_In is abstract tagged record
Next : access Abstract_Plug_In'Class;
end record;
end Matreshka.Internals.SQL_Drivers.Oracle.Plug_In;
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