src/DAL/KeyDef.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 KeyDef.h
  24  * This file contains the KeyDef class.
  25  *
  26  * @see KeyDef
  27  */
  28
  29 #include "FieldDef.h"
  30 #include "Types.h"
  31
  32 /**
  33  * This class represents the definition of a key field in a table.
  34  *
  35  * Based on this class KeyImpl's will be generated.
  36 */
  37 class KeyDef : public FieldDef
  38 {
  39 public:
  40         /** Constructs a key for the specified foreign table with the specified name. */
  41         KeyDef(TableDefPtr foreignTable, cstring name, bool primary) : FieldDef(name, false, false), m_foreignTable(foreignTable), m_primary(primary) { Assert(foreignTable); }
  42
  43         /** Destructor, a noop. */
  44         ~KeyDef() { }
  45
  46
  47         /** Returns that this field is a key field. */
  48         bool isKey() const { return true; }
  49
  50         /** Whether this field is a primary key field. */
  51         bool isPrimaryKey() const { return m_primary; }
  52
  53         /** Returns the foreign table for this key, is NULL for native keys. */
  54         TableDefPtr getForeignTable() { return m_foreignTable; }
  55
  56 private:
  57         TableDefPtr m_foreignTable; /**< The foreign table for this key. */
  58         bool m_primary; /**< Whether this key is a primary key. */
  59 };