struct.hpp

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/*
  STRUCT.hpp  -  key abstraction: structural asset

   Copyright (C)
     2008,            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 ASSET_STRUCT_H
#define ASSET_STRUCT_H

#include "lib/symbol.hpp"
#include "steam/asset.hpp"
#include "common/query.hpp"
#include "lib/nocopy.hpp"

#include <memory>
#include <string>



namespace steam {
namespace asset {
  
  using std::string;
  using std::unique_ptr;
  using lumiera::Query;
  using lib::Symbol;
  
  class Struct;
  class StructFactory;
  class StructFactoryImpl;
  class Pipe;
  
  
  template<>
  class ID<Struct> : public ID<Asset>
    {
    public:
      ID (HashVal id);
      ID (const Struct&);
    };
  
  
  
  class Struct : public Asset
    {
    public:
      static StructFactory retrieve;
      
      virtual const ID<Struct>&
      getID()  const             
        { 
          return static_cast<const ID<Struct>& > (Asset::getID()); 
        }
      
      
      
    protected:
      Struct (const Asset::Ident& idi) : Asset(idi) {}
    };
    
    
    // definition of ID<Struct> ctors is possible now,
   //  after providing full definition of class Struct
  
  inline ID<Struct>::ID(HashVal id)         : ID<Asset> (id)           {};
  inline ID<Struct>::ID(const Struct& stru) : ID<Asset> (stru.getID()) {};
  
  
  
  
  
  
  class StructFactory
    : util::NonCopyable
    {
      unique_ptr<StructFactoryImpl> impl_;
      
    protected:
      StructFactory ();
      friend class Struct;
      
      
    public:
      template<class STRU>
      lib::P<STRU> operator() (Query<STRU> const& query);
      
//    lib::P<Timeline> operator() (MORef<Binding>);  ///////////TODO doesn't this create circular includes?? Any better idea how to refer to an existing binding?
      
      template<class STRU>
      lib::P<STRU> newInstance (Symbol nameID  ="");
      
      template<class STRU>
      lib::P<STRU> made4fake  (Query<STRU> const& query);  
      
      lib::P<Pipe> newPipe (string pipeID, string streamID);
    };
  
  
  
}} // namespace steam::asset
#endif