ArrayNodalKernel.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

#include "NodalKernelBase.h"
#include "MooseVariableInterface.h"

class ArrayNodalKernel : public NodalKernelBase, public MooseVariableInterface<RealEigenVector>
{
public:
  static InputParameters validParams();

  ArrayNodalKernel(const InputParameters & parameters);

  virtual void computeResidual() override;

  virtual void computeJacobian() override;

  virtual void computeOffDiagJacobian(unsigned int jvar) override;

  const MooseVariableFE<RealEigenVector> & variable() const override { return _var; }

protected:
  virtual void computeQpResidual(RealEigenVector & residual) = 0;

  virtual void computeQpJacobian() {}

  virtual void computeQpOffDiagJacobian(unsigned int /*jvar*/) {}

  void setJacobian(unsigned int i, unsigned int j, Real value);

  MooseVariableFE<RealEigenVector> & _var;

  const ArrayVariableValue & _u;

  const unsigned int _count;

private:
  RealEigenVector _work_vector;

  const std::vector<dof_id_type> * _ivar_indices;
  const std::vector<dof_id_type> * _jvar_indices;

  const std::vector<Real> & _scaling;
};