anytype_reader.h

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/* This software and supporting documentation are distributed by
 *     Institut Federatif de Recherche 49
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 *
 * This software is governed by the CeCILL-B license under
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 * You can  use, modify and/or redistribute the software under the
 * terms of the CeCILL-B license as circulated by CEA, CNRS
 * and INRIA at the following URL "http://www.cecill.info".
 *
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 */
#ifndef AIMS_ANYTYPE_READER_H
#define AIMS_ANYTYPE_READER_H
 
// includes from STL
#include <iostream>
#include <string>
 
// includes from AIMS
#include "aims/data/data_g.h"
#include "aims/io/process.h"
#include "aims/utility/converter_g.h"
 
namespace aims
{
 
  namespace
  {
    // TODO: Add specializations for type couples we wish to use.
    // NB: The reason why it is not a member class of RawConverterWithAllocation is that
    // it then cannot be partially specialized :(
    template < typename T1, typename T2 >
    struct Allocator;

    template < typename T1, typename T2 >
    struct Allocator< AimsData<T1>, AimsData<T2> >
    {
      void operator()(const AimsData<T1> & im1, AimsData<T2> & im2) const
      {
        im2 = AimsData<T2>(im1.dimX(), im1.dimY(), im1.dimZ());
        im2.setSizeX(im1.sizeX());
        im2.setSizeY(im1.sizeY());
        im2.setSizeZ(im1.sizeZ());
      }
    };
  }
 
  namespace
  {
    template < typename T1, typename T2 >
    class RawConverterWithAllocation
    {
    public: // constructors

      RawConverterWithAllocation()
        : m_cartoConverter()
        , m_allocator()
      {}
 
    public: // functions

      void convert(const T1 & in, T2 & out) const
      {
        m_allocator(in, out);
        m_cartoConverter.convert(in, out);
      }
 
    private: // data
 
      carto::RawConverter<T1, T2>   m_cartoConverter;
      Allocator<T1,T2>              m_allocator;
    };
  }
 
 
  namespace
  {
    // TODO: If found useful elsewhere, could be de-anonymized and put in a separate file.
    template < template <typename, typename> class TArg2 >
    struct TArgWrapper2
    {
      template <typename T1, typename T2 >
      struct Type
      {
        typedef TArg2<T1, T2> type;
      };
    };
  }
 
  //----------------------------------------------------------------------------------
 
    //------------------------//
   //  AnyTypeReaderProcess  //
  //------------------------//

  template < typename T, typename TConvertorFamily = TArgWrapper2<RawConverterWithAllocation> >
  class AnyTypeReaderProcess : public Process
  {
  public: // typedefs
    typedef T                 return_type;
    typedef TConvertorFamily  convertor_type;
 
  public: // constructors

    explicit AnyTypeReaderProcess(const T & init);
 
  public: // set & get

    T       & get()       { return m_res; }
    T const & get() const { return m_res; }
 
  private: // functions
 
    void registerProcesses();
 
  private: // data
 
    T m_res;
  };
 
 
  //----------------------------------------------------------------------------------
 
    //-----------------//
   //  AnyTypeReader  //
  //-----------------//
  
 
  template < typename T, typename TConvertorFamily = TArgWrapper2<RawConverterWithAllocation> >
  // private inheritance to hide Process members.
  class AnyTypeReader : private AnyTypeReaderProcess<T, TConvertorFamily>
  {
  public: // typedefs
 
    typedef AnyTypeReaderProcess<T, TConvertorFamily> Base;
 
  public: // constructors

    explicit AnyTypeReader(std::string filename);
 
  public: // functions

    void read(T & out);
 
  private: // data
 
    std::string m_filename;
  };
 
} // namespace aims
 
 
// implementation
#include "aims/utility/anytype_reader_details.h"
 
#endif