MFEMEigensolverBase.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#ifdef MOOSE_MFEM_ENABLED

#pragma once

#include "MFEMLinearSolverBase.h"

namespace Moose::MFEM
{
class EigensolverBase : public LinearSolverBase
{
public:
  static InputParameters validParams();

  EigensolverBase(const InputParameters & parameters);

  virtual void SetOperator(mfem::OperatorHandle & op) override = 0;

  virtual void SetMassMatrix(mfem::OperatorHandle & mass) = 0;

  virtual void GetEigenvalues(mfem::Array<mfem::real_t> & eigenvalues) const = 0;

  virtual const mfem::HypreParVector & GetEigenvector(int index) const = 0;

protected:
  int _num_modes;
};
}

#endif