roweditbuffer.h

/* This file is part of the KDE project
   Copyright (C) 2003, 2006 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_ROWEDITBUFFER_H
#define KEXIDB_ROWEDITBUFFER_H
 
#include <tqmap.h>
 
#include <kexidb/field.h>
#include <kexidb/queryschema.h>
 
namespace KexiDB {

class KEXI_DB_EXPORT RowEditBuffer {
public:
    typedef TQStringVariantMap SimpleMap;
    typedef TQMap<QueryColumnInfo*,TQVariant> DBMap;
 
    RowEditBuffer(bool dbAwareBuffer);
    ~RowEditBuffer();
 
    inline bool isDBAware() const { return m_dbBuffer!=0; }
 
    void clear();
 
    bool isEmpty() const;

    inline void insert( QueryColumnInfo& ci, TQVariant &val ) {
        if (m_dbBuffer) {
            m_dbBuffer->insert(&ci, val);
            m_defaultValuesDbBuffer->remove(&ci);
        }
    }

    inline void insert( const TQString& fname, TQVariant &val ) 
        { if (m_simpleBuffer) m_simpleBuffer->insert(fname,val); }

    const TQVariant* at( QueryColumnInfo& ci, bool useDefaultValueIfPossible = true ) const;
    
    const TQVariant* at( Field& f ) const;

    const TQVariant* at( const TQString& fname ) const;

    inline bool hasDefaultValueAt( QueryColumnInfo& ci ) const {
        return m_defaultValuesDbBuffer->contains(&ci) && (*m_defaultValuesDbBuffer)[ &ci ];
    }
 
    inline const SimpleMap simpleBuffer() { return *m_simpleBuffer; }
    inline const DBMap dbBuffer() { return *m_dbBuffer; }

    void debug();
 
protected:
    SimpleMap *m_simpleBuffer;
    SimpleMap::ConstIterator *m_simpleBufferIt;
    DBMap *m_dbBuffer;
    DBMap::Iterator *m_dbBufferIt;
    TQMap<QueryColumnInfo*,bool> *m_defaultValuesDbBuffer;
    TQMap<QueryColumnInfo*,bool>::ConstIterator *m_defaultValuesDbBufferIt;
};
 
} //namespace KexiDB
 
#endif