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MySQLaux 0.6 is free software from written by Thomas Langen.

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MySQLaux/TypedField.h

Go to the documentation of this file.

/* 
 * MySQLaux - auxiliary classes for communication with MySQL databases
 * Copyright © 2001  Thomas Langen (mailto:langen@langensoft.com)
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * $Source: TypedField.h $
 * $Id: TypedField.h 1.5 Fri, 06 Apr 2001 10:30:48 +0200 langen $
 * $ProjectHeader: MySQLaux 0.6 Fri, 06 Apr 2001 10:30:48 +0200 langen $
 */

#ifndef __MySQLaux_TypedField_h__
#define __MySQLaux_TypedField_h__

#include "Exception.h"
#include "Field.h"
#include <sstream>

namespace MySQLaux
{
  template<class T>
  class TypedField
    : public Field
  {
  private:
    T _value;
  public:
#if 0

    TypedField (std::string const & name,
                T const & value)
        : Field (name),
          _value (value)
    {
    }
#endif
    
    TypedField (std::string const & name,
                std::string const & data)
        : Field (name)
    {
      std::istringstream is (data);
      is >> _value;
    }
    
    TypedField (string const & name)
        : Field (name, true)
    {
    }
    
    T const & value() const
      throw (NullFieldIndicator)
    {
      if (_is_null)
        throw NullFieldIndicator ();
      return _value;
    }
    
    std::string to_string () const
      throw (NullFieldIndicator)
    {
      if (_is_null)
        throw NullFieldIndicator ();
      
      std::ostringstream os;
      os << _value;
      return os.str();
    }

    std::size_t size () const { return sizeof(_value); }
  };
}

#endif // __MySQLaux_TypedField_h__ 

/*
 * Local Variables:
 * mode: C++
 * fill-column: 80
 * c-comment-continuation-stars: " * "
 * End:
 */

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