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connector.h

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/*
   This file is part of the KDB libraries
   Copyright (c) 2000 Praduroux Alessandro <pradu@thekompany.com>
 
   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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
*/     
#ifndef CONNECTOR_H
#define CONNECTOR_H

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <qstring.h>
#include <qstringlist.h>

#include "exception.h"
#include "kdb.h"

#define QUERYTABLE "__KDBQueries"

namespace KDB {

class Exception;
class Handler;
class Table;

class Connector {

 public:
    Connector();
    Connector(const Connector& c);
    virtual ~Connector();

    // nonvirtual methods
    void setHost(const QString & host);
    void setPort(int port);
    void setUser(const QString & user);
    void setPassword(const QString & pwd);

    QString host() const;
    int port() const;
    QString user() const;
    QString password() const;
    bool isConnected() const;
    // virtual methods: must be overridden in the subclass

    virtual void close();

    virtual bool connect() = 0;

    virtual QString protocol() const = 0;

    virtual QStringList databases() = 0;

    virtual QStringList tables() = 0;
    virtual QStringList queries() = 0;

    virtual QStringList fields(const QString & tableName) = 0;

    virtual unsigned long long execute(const QString &sql) = 0;

    virtual bool createDatabase(const QString & name) = 0;

    virtual bool createTable(const Table & tab) = 0;

    virtual Connector * clone() = 0;

    virtual bool setCurrentDatabase(const QString &name) = 0;

    virtual DataType nativeToKDB(const QString &type) = 0;

    virtual QString KDBToNative(DataType type) = 0;

    virtual Handler *query(const QString &SQL) = 0;

 protected:

    void setConnected(bool conn);

 private:

    QString _host;
    int _port;
    QString _user;
    QString _pwd;

    bool _connected;

};

};
#endif

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