InputStream.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#pragma once

#include <memory>
#include <istream>
#include <vector>
#include <filesystem>
#include <optional>

class InputStream
{
public:
  virtual ~InputStream();

  virtual std::shared_ptr<std::istream> get() const = 0;

  bool inUse() const;

  virtual std::optional<std::filesystem::path> getFilename() const;

protected:
  void addSharedStream(const std::weak_ptr<std::istream> stream) const;

private:
  mutable std::vector<std::weak_ptr<std::istream>> _shared_streams;
};