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data_source.hh

00001 /*
00002 *  Name:      data_source.hh
00003 *  Author:    Rafael Jesus Alcantara Perez
00004 *  Summary:   Definition of a general query class
00005 *  Date:      $Date: 2003/10/06 13:21:35 $
00006 *  Revision:  $Revision: 1.1 $
00007 *
00008 *  Copyright (C) 2001-2002  Rafael Jesus Alcantara Perez <rafa@dedalo-ing.com>
00009 *
00010 *  This program is free software; you can redistribute it and/or modify
00011 *  it under the terms of the GNU General Public License as published by
00012 *  the Free Software Foundation; either version 2 of the License, or
00013 *  (at your option) any later version.
00014 *
00015 *  This program is distributed in the hope that it will be useful,
00016 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00017 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00018 *  GNU General Public License for more details.
00019 *
00020 *  You should have received a copy of the GNU General Public License
00021 *  along with this program; if not, write to the Free Software
00022 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
00023 *  MA 02111-1307, USA.
00024 */
00025 #ifndef _UESQL_DATA_SOURCE__
00026 #define _UESQL_DATA_SOURCE__
00027 
00028 #include <cstdlib>
00029 #include <mpcl/text/string.hh>
00030 
00031 
00033 namespace uesqlc
00034 {
00035 
00040   template <typename TInstance, typename TSize = std::size_t>
00041   class IDataSource
00042   {
00043 
00044     public:
00045 
00047       typedef
00048         TSize
00049         size_type;
00050 
00051 
00052     public:
00053 
00054       //
00055       //  C O N S T R U C T O R S
00056       //
00057 
00062       virtual void closeCursor (const mpcl::text::TString& rkyCURSOR_NAME) = 0;
00063 
00069       virtual size_type declareCursor (const mpcl::text::TString& rkyCURSOR_NAME) = 0;
00070 
00077       virtual void fetchNext ( const mpcl::text::TString& rkyCURSOR_NAME ,
00078                                TInstance&                 rtINSTANCE     ) = 0;
00079 
00087       virtual void fetchAbsolute ( const mpcl::text::TString& rkyCURSOR_NAME ,
00088                                    TInstance&                 rtINSTANCE     ,
00089                                    size_type                  zINDEX         ) = 0;
00090 
00095       virtual void openCursor (const mpcl::text::TString& rkyCURSOR_NAME) = 0;
00096 
00098       virtual void setErrorException (void) = 0;
00099 
00100   };  // class IDataSource
00101 
00102 }  // namespace uesqlc
00103 
00104 
00105 #endif  // not _UESQL_DATA_SOURCE__

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