kexi

relationship.h

00001 /* This file is part of the KDE project
00002    Copyright (C) 2003-2004 Jaroslaw Staniek <js@iidea.pl>
00003 
00004    This library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Library General Public
00006    License as published by the Free Software Foundation; either
00007    version 2 of the License, or (at your option) any later version.
00008 
00009    This library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Library General Public License for more details.
00013 
00014    You should have received a copy of the GNU Library General Public License
00015    along with this library; see the file COPYING.LIB.  If not, write to
00016    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00017  * Boston, MA 02110-1301, USA.
00018  */
00019 
00020 #ifndef KEXIDB_RELATIONSHIP_H
00021 #define KEXIDB_RELATIONSHIP_H
00022 
00023 #include <kexidb/field.h>
00024 
00025 namespace KexiDB {
00026 
00073 class IndexSchema;
00074 class TableSchema;
00075 class QuerySchema;
00076 
00077 class KEXI_DB_EXPORT Relationship
00078 {
00079     public:
00080         typedef QPtrList<Relationship> List;
00081         typedef QPtrListIterator<Relationship> ListIterator;
00082 
00086         Relationship();
00087 
00091         Relationship(IndexSchema* masterIndex, IndexSchema* detailsIndex);
00092 
00093         virtual ~Relationship();
00094 
00097         IndexSchema* masterIndex() const { return m_masterIndex; }
00098 
00101         IndexSchema* detailsIndex() const { return m_detailsIndex; }
00102 
00106         Field::PairList* fieldPairs() { return &m_pairs; }
00107 
00108         bool isEmpty() const { return m_pairs.isEmpty(); }
00109 
00112         TableSchema* masterTable() const;
00113 
00116         TableSchema* detailsTable() const;
00117 
00129         void setIndices(IndexSchema* masterIndex, IndexSchema* detailsIndex);
00130 
00131     protected:
00132         Relationship( QuerySchema *query, Field *field1, Field *field2 );
00133 
00134         void createIndices( QuerySchema *query, Field *field1, Field *field2 );
00135 
00138         void setIndices(IndexSchema* masterIndex, IndexSchema* detailsIndex, bool ownedByMaster);
00139 
00140     IndexSchema *m_masterIndex;
00141         IndexSchema *m_detailsIndex;
00142 
00143         Field::PairList m_pairs;
00144 
00145         bool m_masterIndexOwned : 1;
00146         bool m_detailsIndexOwned : 1;
00147 
00148     friend class Connection;
00149     friend class TableSchema;
00150     friend class QuerySchema;
00151     friend class IndexSchema;
00152 };
00153 
00154 } //namespace KexiDB
00155 
00156 #endif
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