relationship.h

/* This file is part of the KDE project
   Copyright (C) 2003-2004 Jaroslaw Staniek <js@iidea.pl>
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */
 
#ifndef KEXIDB_RELATIONSHIP_H
#define KEXIDB_RELATIONSHIP_H
 
#include <kexidb/field.h>
 
namespace KexiDB {

 
class IndexSchema;
class TableSchema;
class QuerySchema;
 
class KEXI_DB_EXPORT Relationship
{
    public:
        typedef TQPtrList<Relationship> List;
        typedef TQPtrListIterator<Relationship> ListIterator;

        Relationship();

        Relationship(IndexSchema* masterIndex, IndexSchema* detailsIndex);
 
        virtual ~Relationship();

        IndexSchema* masterIndex() const { return m_masterIndex; }

        IndexSchema* detailsIndex() const { return m_detailsIndex; }

        Field::PairList* fieldPairs() { return &m_pairs; }
 
        bool isEmpty() const { return m_pairs.isEmpty(); }

        TableSchema* masterTable() const;

        TableSchema* detailsTable() const;

        void setIndices(IndexSchema* masterIndex, IndexSchema* detailsIndex);
 
    protected:
        Relationship( QuerySchema *query, Field *field1, Field *field2 );
 
        void createIndices( QuerySchema *query, Field *field1, Field *field2 );

        void setIndices(IndexSchema* masterIndex, IndexSchema* detailsIndex, bool ownedByMaster);
 
        IndexSchema *m_masterIndex;
        IndexSchema *m_detailsIndex;
 
        Field::PairList m_pairs;
 
        bool m_masterIndexOwned : 1;
        bool m_detailsIndexOwned : 1;
 
    friend class Connection;
    friend class TableSchema;
    friend class QuerySchema;
    friend class IndexSchema;
};
 
} //namespace KexiDB
 
#endif