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vdbl_row.h

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// Row class implementation -*- C++ -*-

// Copyright (C) 2003 Hermann Schichl
//
// This file is part of the Vienna Database Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the Library GNU General Public License as published by the
// Free Software Foundation; either version 2, 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
// Library GNU General Public License for more details.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the Library GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the Library GNU General Public License.

#ifndef __VDBL_ROW_H
#define __VDBL_ROW_H

#include <algorithm>
#include <map>
#include <vdbl_config.h>
#include <vdbl_types.h>
#include <vdbl_col.h>

__VDBL_BEGIN_NAMESPACE

#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
#pragma set woff 1209
#endif

static _VDBL_col ___empty_col_return;


class _VDBL_row
{ 
private:
  typedef std::map<_VDBL_colid, _VDBL_col> _R_map;

  _R_map _R_i;

public:
  _VDBL_row() : _R_i() {}
  _VDBL_row(const _VDBL_row& __r) : _R_i(__r._R_i) {}
  virtual ~_VDBL_row() {}

  const _VDBL_col& get_col(const _VDBL_colid& _id, bool& error) const
  {
    _R_map::const_iterator __i(_R_i.find(_id));

    if(__i == _R_i.end())
    {
      error = true;
      return ___empty_col_return;
    }
    else
    {
      error = false;
      return (*__i).second;
    }
  }

  _VDBL_col& get_col(const _VDBL_colid& _id, bool& error)
  {
    _R_map::iterator __i(_R_i.find(_id));

    if(__i == _R_i.end())
    {
      error = true;
      return ___empty_col_return;
    }
    else
    {
      error = false;
      return (*__i).second;
    }
  }

  bool has_col(const _VDBL_colid& _id) const
  {
    _R_map::const_iterator __i(_R_i.find(_id));
    return __i != _R_i.end();
  }

  bool insert(const _VDBL_colid& _id, const _VDBL_col& _col)
  {
    _R_map::iterator __i(_R_i.find(_id));
    if(__i != _R_i.end())
      return false;
    else
    {
      _R_i.insert(std::make_pair(_id,_col));
      return true;
    }
  }

  bool drop(const _VDBL_colid& _id)
  {
    _R_map::iterator __i(_R_i.find(_id));
    if(__i == _R_i.end())
      return false;
    else
    {
      _R_i.erase(__i);
      return true;
    }
  }

  void update(const _VDBL_colid& _id, const _VDBL_col& _col)
  {
    _R_map::iterator __i(_R_i.find(_id));
    if(__i != _R_i.end())
      _R_i.erase(__i);
    _R_i.insert(std::make_pair(_id,_col));
  }
};


class row : public _VDBL_row
{
private:
  typedef _VDBL_row _Base;
public:
  typedef _VDBL_colid id;
  typedef _VDBL_col col;

  row() : _Base() {}
  row(const row& __r) : _Base(__r) {}
  row(const _Base& __r) : _Base(__r) {}

  row& operator=(const row& _x)
  {
    return *(row*)&(this->_Base::operator=(_x));
  }

  row& operator=(const _Base& _x)
  {
    return *(row*)&(this->_Base::operator=(_x));
  }
};

#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
#pragma reset woff 1209
#endif

__VDBL_END_NAMESPACE

#endif /* __VDBL_ROW_H */

// Local Variables:
// mode:C++
// End:

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