LUMIERA.clone/src/proc/asset/unknown.cpp

/*
  Unknown  -  placeholder for unknown or unavailable media source

  Copyright (C)         Lumiera.org
    2008,               Hermann Vosseler <Ichthyostega@web.de>

  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., 675 Mass Ave, Cambridge, MA 02139, USA.

* *****************************************************/


/** @file unknown.cpp
 ** Implementation functions regarding a marker asset for unknown media.
 */


#include "proc/asset/unknown.hpp"
#include "lib/format-string.hpp"

using util::_Fmt;

namespace proc {
namespace asset {
  
  LUMIERA_ERROR_DEFINE (ORIG_NOT_FOUND, "Media referred by placeholder not found");
  
  
  
  /** create a placeholder for a media with the given identity.
   *  the denoted original media (identity) can be accessed later
   *  on using the Unknown::getOrg() function.
   *  @note we don't depend on the refered media...
   */
  Unknown::Unknown (const Asset::Ident& idi, string name, Duration length)
    : Media (idi, name, length)
  {
    TODO ("implement some sensible behaviour for the »unknown media« placeholder...");
  }  
  
  
  /** using the information stored in this placeholder asset, 
   *  try to access the "real" media it stands for.
   */
  Media::PMedia 
  Unknown::getOrg()
  {
    UNIMPLEMENTED ("how to get at the original media from a »Unknown« placeholder");
    if (1==0)
      throw lumiera::error::Invalid (_Fmt("Unable to locate original media "
                                          "for ID=%s, filename=\"%s\".")
                                         % this->ident
                                         % this->getFilename()
                                    ,LUMIERA_ERROR_ORIG_NOT_FOUND);
  }
  
  
  
}} // namespace asset