FacilityHelper.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
/*********************************************************************************
 *  PLEASE READ THIS!!!!!!!
 *
 *  This file MAY NOT be modified to use anything from a package other than
 *Kernel.
 *********************************************************************************/
#pragma once
 
#include "MantidKernel/ConfigService.h"
#include "MantidKernel/FacilityInfo.h"
#include <Poco/Path.h>
 
namespace FacilityHelper {
 
struct ScopedFacilities {
  ScopedFacilities(const std::string &filename, const std::string &defFacility) {
    auto &config = Mantid::Kernel::ConfigService::Instance();
    defFacilityOnStart = config.getFacility().name();
    Poco::Path testFile = Poco::Path(config.getInstrumentDirectory()).resolve(filename);
    // Load the test facilities file
    config.updateFacilities(testFile.toString());
    config.setFacility(defFacility);
  }
 
  ~ScopedFacilities() {
    auto &config = Mantid::Kernel::ConfigService::Instance();
    // Restore the main facilities file
    config.updateFacilities(); // no file loads the default
    config.setFacility(defFacilityOnStart);
  }
 
private:
  std::string defFacilityOnStart;
};
} // namespace FacilityHelper