SpectrumIndexSet.h

#ifndef MANTID_KERNEL_SPECTRUMINDEXSET_H_
#define MANTID_KERNEL_SPECTRUMINDEXSET_H_

#include <vector>

#include "MantidKernel/DllConfig.h"

namespace Mantid {
namespace Kernel {

class MANTID_KERNEL_DLL SpectrumIndexSet {
public:
  SpectrumIndexSet(size_t numberOfHistograms);
  SpectrumIndexSet(int64_t min, int64_t max, size_t numberOfHistograms);
  SpectrumIndexSet(const std::vector<size_t> indices,
                   size_t numberOfHistograms);

  size_t size() const { return m_size; }

  size_t operator[](size_t index) const {
    if (m_isRange)
      return m_min + index;
    return m_indices[index];
  }

private:
  bool m_isRange;
  // Default here to avoid uninitialized warning for m_isRange = true.
  size_t m_min = 0;
  size_t m_size;
  std::vector<size_t> m_indices;
};

} // Namespace Kernel
} // Namespace Mantid

#endif /* MANTID_KERNEL_SPECTRUMINDEXSET_H_ */