SundanceNonlinearProblem.hpp

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//                              Sundance
//                 Copyright (2005) Sandia Corporation
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#ifndef SUNDANCE_NONLINEARPROBLEM_H
#define SUNDANCE_NONLINEARPROBLEM_H

#include "SundanceDefs.hpp"
#include "SundanceNLOp.hpp"
#include "PlayaNOXSolver.hpp"
#include "PlayaNonlinearSolver.hpp"
#include "PlayaNewtonArmijoSolverDecl.hpp"
#ifndef HAVE_TEUCHOS_EXPLICIT_INSTANTIATION
#include "PlayaNewtonArmijoSolverImpl.hpp"
#endif

namespace Sundance
{
using namespace Teuchos;


/** 
 * NonlinearProblem encapsulates a discrete nonlinear problem
 */
class NonlinearProblem 
  : public ObjectWithClassVerbosity<NonlinearProblem>
{
public:
  /** Empty ctor */
  NonlinearProblem();

  /** Construct with a mesh, equation set, bcs, test and unknown funcs,
   * and a vector type */
  NonlinearProblem(const Mesh& mesh, const Expr& eqn, const Expr& bc,
    const Expr& test, const Expr& unk, const Expr& u0, 
    const Playa::VectorType<double>& vecType);

  /** Construct with a mesh, equation set, bcs, test and unknown funcs,
   * parameters, and a vector type */
  NonlinearProblem(const Mesh& mesh, const Expr& eqn, const Expr& bc,
    const Expr& test, const Expr& unk, const Expr& u0, 
    const Expr& params, const Expr& paramVals,  
    const Playa::VectorType<double>& vecType);

  /** Construct with a mesh, equation set, bcs, test and unknown funcs,
   * and a vector type */
  NonlinearProblem(const Mesh& mesh, const Expr& eqn, const Expr& bc,
    const BlockArray& test, const BlockArray& unk, const Expr& u0);


  /** */
  NonlinearProblem(const RCP<Assembler>& assembler, 
    const Expr& u0);

  /** Compute direct sensitivities to parameters */
  Expr computeSensitivities(const LinearSolver<double>& solver) const 
    {return op_->computeSensitivities(solver);}

  /** Solve the nonlinear problem */
  SolverState<double> solve(const NOXSolver& solver) const ;

  /** Solve the nonlinear problem */
  SolverState<double> solve(const NonlinearSolver<double>& solver) const ;

  /** Return the current evaluation point as a Sundance expression */
  Expr getU0() const {return op_->getU0();}

  /** Set an initial guess */
  void setInitialGuess(const Expr& u0New) {op_->setInitialGuess(u0New);}

  /** Set the current evaluation point */
  void setEvalPoint(const Expr& u0New) {op_->setInitialGuess(u0New);}
      

  /** Compute the residual and Jacobian at the current evaluation point */
  LinearOperator<double> computeJacobianAndFunction(Vector<double>& functionValue) const 
    {return op_->computeJacobianAndFunction(functionValue);}
      
  /** Write the Jacobian and residual into the objects provided */
  void computeJacobianAndFunction(LinearOperator<double>& J,
    Vector<double>& resid) const 
    {op_->computeJacobianAndFunction(J, resid);}

  /** Compute the residual at the current eval point */
  Playa::Vector<double> computeFunctionValue() const 
    {return op_->computeFunctionValue();}
      
  /** Write the residual into the object provided */
  void computeFunctionValue(Vector<double>& resid) const 
    {op_->computeFunctionValue(resid);}
      
  /** Get an initial guess */
  Playa::Vector<double> getInitialGuess() const 
    {return op_->getInitialGuess();}
      
  /** Create the Jacobian object, but don't fill it in. */
  LinearOperator<double> allocateJacobian() const 
    {return op_->allocateJacobian();}

  /** This function forces the assembler to reassemble the matrix */
  void reAssembleProblem() const { op_->reAssembleProblem();}

private:
  RCP<NLOp> op_;
};
}




#endif

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