LinearTimeIntegratorInterface.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

#pragma once

// Moose includes
#include "MooseTypes.h"

// Forward declarations
class SystemBase;
class LinearSystem;

namespace libMesh
{
template <typename T>
class NumericVector;
class LinearImplicitSystem;
} // namespace libMesh

class LinearTimeIntegratorInterface
{
public:
  LinearTimeIntegratorInterface(SystemBase & system);

  virtual Real timeDerivativeRHSContribution(dof_id_type dof_id,
                                             const std::vector<Real> & factors = {}) const;

  virtual Real timeDerivativeMatrixContribution(const Real factor) const;

protected:
  LinearSystem * _linear_system;

  libMesh::LinearImplicitSystem * _linear_implicit_system;
};