placement-index-query-resolver.hpp

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

   Copyright (C)
     2009,            Hermann Vosseler <Ichthyostega@web.de>

  **Lumiera** 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. See the file COPYING for further details.

*/


#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