InputFileFormat.h

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//
//
#ifndef __stir_IO_InputFileFormat_h__
#define __stir_IO_InputFileFormat_h__
/*
    Copyright (C) 2006- 2011, Hammersmith Imanet Ltd
    Copyright (C) 2021, University College London
    This file is part of STIR.
    SPDX-License-Identifier: Apache-2.0
 
    See STIR/LICENSE.txt for details
*/
#include "stir/IO/FileSignature.h"
#include "stir/utilities.h"
#include "stir/unique_ptr.h"
#include <fstream>
#include <string>
 
START_NAMESPACE_STIR


template <class DataT>
class InputFileFormat
{
public:
  typedef DataT data_type;
  virtual ~InputFileFormat() {}
 
  virtual bool can_read(const FileSignature& signature, std::istream& input) const
  {
    return this->actual_can_read(signature, input);
  }
  virtual bool can_read(const FileSignature& signature, const std::string& filename) const
  {
    std::ifstream input;
    open_read_binary(input, filename);
    return this->actual_can_read(signature, input);
  }


  virtual unique_ptr<DataT> read_from_file(std::istream& input) const = 0;


  virtual unique_ptr<DataT> read_from_file(const std::string& filename) const
  {
    std::ifstream input;
    open_read_binary(input, filename);
    return read_from_file(input);
  }
 
  virtual const std::string get_name() const = 0;
 
protected:
  virtual bool actual_can_read(const FileSignature& signature, std::istream& input) const = 0;
};
 
END_NAMESPACE_STIR
 
#endif