src/DAL/DatabaseMgr.h

   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Sverre Rabbelier                                *
   3  *   sverre@rabbelier.nl                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 3 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #pragma once
  21
  22 /**
  23  * @file DatabaseMgr.h
  24  * This file contains the DatabaseMgr class.
  25  *
  26  * @see DatabaseMgr
  27  */
  28
  29 #include "Database.h"
  30 #include "Types.h"
  31
  32 /**
  33  * This class manages the database connection.
  34  *
  35  * Before calling the <code>Get</code> method <code>Initialize</code> should have been called at least once.
  36  * <code>Initialize</code> will set the path to the database to use when the instance is created.
  37  * Since the path is specific to each instance each call to <code>Free</code> should be followed by <code>Initialize</code>.
  38  * Ofcourse, the last call to <code>Free</code> (when shutting down) should not be followed by <code>Initialize</code>.
  39  *
  40  * @see Get
  41  * @see Initialize
  42  * @see Free
  43  */
  44 class DatabaseMgr : public Singleton<DatabaseMgr>
  45 {
  46 public:
  47         /** Initialize the DatabaseMgr with a specific path. */
  48         static void Initialize(const std::string& path);
  49
  50         /** Returns a pointer to the Database. */
  51         Database* DB();
  52
  53         /** Returns a reference to the Database. */
  54         Database& DBref();
  55
  56 private:
  57         /** This is a singleton class, use <code>Get</code> to get the instance. */
  58         DatabaseMgr();
  59
  60         /** Hide the copy constructor. */
  61         DatabaseMgr(const DatabaseMgr& rhs);
  62
  63         /** Hide the assignment constructor. */
  64         DatabaseMgr operator=(const DatabaseMgr& rhs);
  65
  66         /** This is a singleton class, use <code>Free</code> to free the instance. */
  67         ~DatabaseMgr();
  68
  69         friend class Singleton<DatabaseMgr>;
  70
  71         std::string m_path; /**< The path to the database to use. */
  72         Database* m_db; /**< A pointer to the database. */
  73
  74         static std::string m_staticpath; /**< The path to the database to use for the next instance. */
  75 };