parser.h

/* This file is part of the KDE project
   Copyright (C) 2003 Lucijan Busch <lucijan@kde.org>
   Copyright (C) 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 KEXIDBPARSER_H
#define KEXIDBPARSER_H
 
#include <tqobject.h>
#include <tqptrlist.h>
#include <tqvariant.h>
 
#include <kexidb/field.h>
#include <kexidb/expression.h>
 
namespace KexiDB
{
 
class Connection;
class QuerySchema;
class TableSchema;
class Field;

class KEXI_DB_EXPORT ParserError
{
    public:

        ParserError();

        ParserError(const TQString &type, const TQString &error, const TQString &hint, int at);

        ~ParserError();

        TQString    type() { return m_type; }

        TQString    error() { return m_error; }

        int at() { return m_at; }
 
    private:
        TQString m_type;
        TQString m_error;
        TQString m_hint;
        int m_at;
//      bool    m_isNull;
};
 
class ParserPrivate;

class KEXI_DB_EXPORT Parser
{
    public:

        enum OPCode
        {
            OP_None = 0, 
            OP_Error, 
            OP_CreateTable, 
            OP_AlterTable, 
            OP_Select, 
            OP_Insert, 
            OP_Update, 
            OP_Delete  
        };

        Parser(Connection *connection);
        ~Parser();

        bool parse(const TQString &statement);

        void clear();

        OPCode operation() const;

        TQString operationString() const;

        TableSchema *table();

        QuerySchema *query();

        Connection  *db() const;

        ParserError error() const;

        TQString statement() const;

        void setOperation(OPCode op);

        void createTable(const char *t);

//todo: other query types
        void setQuerySchema(QuerySchema *query);

        QuerySchema *select() const;

        void setError(const ParserError &err);

        bool isReservedKeyword(const char *str);
 
    protected:
        void init();
 
        ParserError m_error; 
        ParserPrivate *d; 
};
 
}
 
#endif