IpPDPerturbationHandler.hpp

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// Copyright (C) 2005, 2007 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Eclipse Public License.
//
// Authors:  Carl Laird, Andreas Waechter              IBM    2005-08-04
 
#ifndef __IPPDPERTURBATIONHANDLER_HPP__
#define __IPPDPERTURBATIONHANDLER_HPP__
 
#include "IpAlgStrategy.hpp"
 
namespace Ipopt
{
 
class PDPerturbationHandler: public AlgorithmStrategyObject
{
public:
 
   PDPerturbationHandler();
 
   virtual ~PDPerturbationHandler()
   { }
 
   /* overloaded from AlgorithmStrategyObject */
   virtual bool InitializeImpl(
      const OptionsList& options,
      const std::string& prefix
   );
 
   virtual bool ConsiderNewSystem(
      Number& delta_x,
      Number& delta_s,
      Number& delta_c,
      Number& delta_d
   );
 
   virtual bool PerturbForSingularity(
      Number& delta_x,
      Number& delta_s,
      Number& delta_c,
      Number& delta_d
   );
 
   virtual bool PerturbForWrongInertia(
      Number& delta_x,
      Number& delta_s,
      Number& delta_c,
      Number& delta_d);
 
   virtual void CurrentPerturbation(
      Number& delta_x,
      Number& delta_s,
      Number& delta_c,
      Number& delta_d
   );
 
   static void RegisterOptions(
      SmartPtr<RegisteredOptions> roptions
   );
 
protected:
 
   PDPerturbationHandler(
      const PDPerturbationHandler&
   );
 
   void operator=(
      const PDPerturbationHandler&
   );
 
 
   Number delta_x_last_;
   Number delta_s_last_;
   Number delta_c_last_;
   Number delta_d_last_;
 
 
   Number delta_x_curr_;
   Number delta_s_curr_;
   Number delta_c_curr_;
   Number delta_d_curr_;
 
   bool get_deltas_for_wrong_inertia_called_;
 
 
   enum DegenType
   {
      NOT_YET_DETERMINED,
      NOT_DEGENERATE,
      DEGENERATE
   };
 
   DegenType hess_degenerate_;
 
   DegenType jac_degenerate_;
 
   Index degen_iters_;
 
   enum TrialStatus
   {
      NO_TEST,
      TEST_DELTA_C_EQ_0_DELTA_X_EQ_0,
      TEST_DELTA_C_GT_0_DELTA_X_EQ_0,
      TEST_DELTA_C_EQ_0_DELTA_X_GT_0,
      TEST_DELTA_C_GT_0_DELTA_X_GT_0
   };
 
   TrialStatus test_status_;
 
 
   Number delta_xs_max_;
   Number delta_xs_min_;
   Number delta_xs_first_inc_fact_;
   Number delta_xs_inc_fact_;
   Number delta_xs_dec_fact_;
   Number delta_xs_init_;
   Number delta_cd_val_;
   Number delta_cd_exp_;
   bool reset_last_;
   Index degen_iters_max_;
   bool perturb_always_cd_;
 
 
   bool get_deltas_for_wrong_inertia(
      Number& delta_x,
      Number& delta_s,
      Number& delta_c,
      Number& delta_d
   );
 
   void finalize_test();
 
   Number delta_cd();
 
};
 
} // namespace Ipopt
 
#endif