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field.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 FIELD_H
#define FIELD_H

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

#include "kdb.h"
#include "object.h"

#include <qlist.h>
#include <qstring.h>
#include <qdatetime.h>


namespace KDB {

class Handler;

class Field;
typedef QList<Field>         FieldList;
typedef QListIterator<Field> FieldIterator;

 //BIG TODO: conversion operators and logic
class Field :public Object {
    
    friend class Recordset;
    friend class Record;
    friend class Table;
    
    Q_OBJECT
  
 public:

    ~Field();

    void setPrecision(unsigned int size);
    unsigned int precision();

    void setSize(unsigned int size);
    unsigned int size();

    void setType(DataType t);
    DataType type() ;

    QString nativeType();

    void setConstraint(const QString &val);
    QString constraint() ;

    void setAcceptNull(bool);
    bool acceptNull();

    bool isNull();
    
    void operator =(const QString &newVal) ;  
    void operator =(const QDateTime &newVal) ;      
    void operator =(int newVal) ; 
    void operator =(double newVal)  ;   
    
    operator QString() ;                      
    operator QDateTime() ;
    operator int() ;
    operator double() ;                                   

 private:
    Field (const QString &name, QObject *parent = 0);
    Field (Handler *h,  const QString &name, const QByteArray &val, QObject *parent = 0);

    QByteArray m_val;
    Handler *m_handler;

    DataType m_type;
    unsigned int m_size;
    unsigned int m_precision;
    QString m_constraint;
    bool m_acceptNull;
};
 
}

#endif

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