base/VFileSystem

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/* **-*-c++-*-**************************************************************
  Copyright (C)1996 David Jung <opensim@pobox.com>

  This program/file 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. (http://www.gnu.org)
  
  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
  
  $Id: VFileSystem 1029 2004-02-11 20:45:54Z jungd $
  $Revision: 1.5 $
  $Date: 2004-02-11 15:45:54 -0500 (Wed, 11 Feb 2004) $
  $Author: jungd $
 
****************************************************************************/

#ifndef _BASE_VFILESYSTEM_
#define _BASE_VFILESYSTEM_

#include <base/base>
#include <base/ReferencedObject>
#include <base/path_not_found>
#include <base/io_error>

#include <base/PathName>
#include <base/VEntry>
#include <base/VDirectory>
#include <base/VFile>


namespace base {


class VFileSystem : public ReferencedObject
{
public:
  VFileSystem() {}
  virtual ~VFileSystem() {}

  virtual ref<VDirectory> root() = 0; ///< get the root directory of this VFileSystem (e.g. "/")
  virtual ref<VDirectory> temp() = 0; ///< get directory in which temporary files can be stored
  virtual ref<VDirectory> current() = 0; ///< get the current working directory
  virtual void setCurrent(const PathName& path) throw (path_not_found, io_error, std::invalid_argument) = 0; ///< set the current directory (defaults to root)

  virtual ref<VDirectory> getDirectory(const PathName& path)   throw (path_not_found, io_error, std::invalid_argument) = 0;
  virtual ref<VFile>      getFile(const PathName& path)        throw (path_not_found, io_error, std::invalid_argument) = 0;
  virtual bool            exists(const PathName& path)         throw (io_error) = 0;

protected:  
  VFileSystem(const VFileSystem& vfs) {}

};

} // base

#endif

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