placement-index-query-resolver.hpp

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/*
  PLACEMENT-INDEX-QUERY-RESOLVER.hpp  -  using PlacementIndex to resolve scope queries

  Copyright (C)         Lumiera.org
    2009,               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.

*/


#ifndef MOBJECT_SESSION_PLACEMENT_INDEX_QUERY_RESOLVER_H
#define MOBJECT_SESSION_PLACEMENT_INDEX_QUERY_RESOLVER_H

#include "steam/mobject/session/placement-index.hpp"
#include "steam/mobject/session/scope-query.hpp"

#include "common/query.hpp"

#include <functional>


namespace steam {
namespace mobject {
namespace session {
 
  using std::function;
  using lumiera::Goal;
  
  typedef PlacementIndex& IndexLink(void);
  
  class Explorer;
  
  
  class PlacementIndexQueryResolver
    : public lumiera::QueryResolver
    {
      
      function<IndexLink> _getIndex;
      
      
      virtual bool canHandleQuery(Goal::QueryID const&)  const override;
      
      virtual operator string()  const override { return "PlacementIndex"; }
      
      
      Explorer* setupExploration (PlacementIndex::ID startID, ScopeQueryKind direction);
      
      void preGenerateInvocationContext();
      
      template<typename MO>
      void defineHandling();
        
      template<typename MO>
      lumiera::Resolution* resolutionFunction (Goal const& goal);
      
      
    public:
      PlacementIndexQueryResolver (PlacementIndex& theIndex);
      PlacementIndexQueryResolver (function<IndexLink> const& accessIndex);
    };
  
  
}}} // namespace steam::mobject::session
#endif