CreateSingleValuedWorkspace.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 "MantidAlgorithms/CreateSingleValuedWorkspace.h"
#include "MantidDataObjects/WorkspaceCreation.h"
#include "MantidDataObjects/WorkspaceSingleValue.h"
#include "MantidIndexing/IndexInfo.h"
#include "MantidKernel/BoundedValidator.h"
 
namespace Mantid::Algorithms {
 
// Register the algorithm into the AlgorithmFactory
DECLARE_ALGORITHM(CreateSingleValuedWorkspace)
 
void CreateSingleValuedWorkspace::init() {
  using namespace Mantid::Kernel;
  using namespace Mantid::API;
  declareProperty(std::make_unique<WorkspaceProperty<>>("OutputWorkspace", "", Direction::Output),
                  "Name to use for the output workspace");
  declareProperty("DataValue", 0.0, "The value to place in the workspace");
  auto mustBePositive = std::make_shared<BoundedValidator<double>>();
  mustBePositive->setLower(0.0);
  declareProperty("ErrorValue", 0.0, mustBePositive, "The error value to place in the workspace (default 0.0)");
}
 
void CreateSingleValuedWorkspace::exec() {
  double dataValue = getProperty("DataValue");
  double errorValue = getProperty("ErrorValue");
 
  Indexing::IndexInfo indexInfo(1);
  auto singleValued = DataObjects::create<DataObjects::WorkspaceSingleValue>(indexInfo, HistogramData::Points(1));
 
  singleValued->mutableX(0)[0] = 0.0;
  singleValued->mutableY(0)[0] = dataValue;
  singleValued->mutableE(0)[0] = errorValue;
 
  setProperty("OutputWorkspace", std::move(singleValued));
}
} // namespace Mantid::Algorithms