LoadMappingTable.cpp

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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 +
#include "MantidDataHandling/LoadMappingTable.h"
#include "LoadRaw/isisraw2.h"
#include "MantidAPI/FileProperty.h"
#include "MantidAPI/MatrixWorkspace.h"
#include "MantidAPI/SpectrumDetectorMapping.h"
 
namespace Mantid::DataHandling {
 
using namespace Kernel;
using namespace API;
 
DECLARE_ALGORITHM(LoadMappingTable)
 
LoadMappingTable::LoadMappingTable() : Algorithm() {}
 
void LoadMappingTable::init() {
  declareProperty(std::make_unique<FileProperty>("Filename", "", FileProperty::Load),
                  "The name of the RAW file from which to obtain the mapping "
                  "information, including its full or relative path.");
  declareProperty(std::make_unique<WorkspaceProperty<>>("Workspace", "Anonymous", Direction::InOut),
                  "The name of the input and output workspace on which to perform the "
                  "algorithm.");
}
 
void LoadMappingTable::exec() {
  // Get the raw file name
  m_filename = getPropertyValue("Filename");
  // Get the input workspace
  const MatrixWorkspace_sptr localWorkspace = getProperty("Workspace");
 
  auto iraw = std::make_unique<ISISRAW2>();
 
  if (iraw->readFromFile(m_filename.c_str(), false) != 0) // ReadFrom File with no data
  {
    g_log.error("Unable to open file " + m_filename);
    throw Kernel::Exception::FileError("Unable to open File:", m_filename);
  }
  progress(0.5);
  const int number_spectra = iraw->i_det; // Number of entries in the spectra/udet table
  if (number_spectra == 0) {
    g_log.warning("The spectra to detector mapping table is empty");
  }
  // Fill in the mapping in the workspace's ISpectrum objects
  localWorkspace->updateSpectraUsing(SpectrumDetectorMapping(iraw->spec, iraw->udet, number_spectra));
  progress(1);
}
 
} // namespace Mantid::DataHandling