IncreasingAxisValidator.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 "MantidAPI/IncreasingAxisValidator.h"
#include "MantidAPI/Axis.h"
#include "MantidAPI/MatrixWorkspace_fwd.h"
 
namespace Mantid::API {
 
Kernel::IValidator_sptr IncreasingAxisValidator::clone() const {
  return std::make_shared<IncreasingAxisValidator>(*this);
}
 
std::string IncreasingAxisValidator::checkValidity(const MatrixWorkspace_sptr &value) const {
  const Axis *xAxis{nullptr};
  try {
    // 0 for X axis
    xAxis = value->getAxis(0);
  } catch (Kernel::Exception::IndexError &) {
    return "No X axis available in the workspace";
  }
 
  // Left-most axis value should be less than the right-most, if ws has
  // more than one X axis value
  if (xAxis->length() > 1 && xAxis->getValue(0) >= xAxis->getValue(xAxis->length() - 1))
    return "X axis of the workspace should be increasing from left to "
           "right";
  else
    return "";
}
 
} // namespace Mantid::API