EigenproblemEquationSystem.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 "EquationSystem.h"

namespace Moose::MFEM
{
class EigensolverBase;

class EigenproblemEquationSystem : public EquationSystem
{
public:
  EigenproblemEquationSystem() = default;
  ~EigenproblemEquationSystem() override = default;

  void BuildEigenproblemJacobian(mfem::BlockVector & trueX);

  void PrepareEigensolver(EigensolverBase & solver);

  bool IsEigen() const override { return true; }

protected:
  virtual void ApplyEssentialBCs() override;

  void FormEigenproblemMatrix();

  void FormMassMatrix();

private:
  friend class EigenproblemESProblemOperator;

  mfem::OperatorHandle _mass_rhs;
};

} // namespace Moose::MFEM

#endif