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# /home/coin/svn-release/Bcps-0.93.10/Alps/examples/Abc/AbcHeuristic.h

Go to the documentation of this file.

    00001 /*===========================================================================*
    00002  * This file is part of the Abstract Library for Parallel Search (ALPS).     *
    00003  *                                                                           *
    00004  * ALPS is distributed under the Eclipse Public License as part of the       *
    00005  * COIN-OR repository (http://www.coin-or.org).                              *
    00006  *                                                                           *
    00007  * Authors:                                                                  *
    00008  *                                                                           *
    00009  *          Yan Xu, Lehigh University                                        *
    00010  *          Ted Ralphs, Lehigh University                                    *
    00011  *                                                                           *
    00012  * Conceptual Design:                                                        *
    00013  *                                                                           *
    00014  *          Yan Xu, Lehigh University                                        *
    00015  *          Ted Ralphs, Lehigh University                                    *
    00016  *          Laszlo Ladanyi, IBM T.J. Watson Research Center                  *
    00017  *          Matthew Saltzman, Clemson University                             *
    00018  *                                                                           *
    00019  *                                                                           *
    00020  * Copyright (C) 2001-2013, Lehigh University, Yan Xu, and Ted Ralphs.       *
    00021  *===========================================================================*/
    00022
    00023 //#############################################################################
    00024 // This file is modified from SbbHeuristic.hpp
    00025 //#############################################################################
    00026
    00027 #ifndef AbcHeuristic_h_
    00028 #define AbcHeuristic_h_
    00029
    00030 #include <string>
    00031 #include <vector>
    00032 #include "CoinPackedMatrix.hpp"
    00033 #include "OsiCuts.hpp"
    00034
    00035 class OsiSolverInterface;
    00036 class AbcModel;
    00037
    00038 //#############################################################################
    00039
    00041 class AbcHeuristic {
    00042 public:
    00043   // Default Constructor
    00044   AbcHeuristic ();
    00045
    00046   // Constructor with model - assumed before cuts
    00047   AbcHeuristic (AbcModel & model);
    00048
    00049   virtual ~AbcHeuristic();
    00050
    00052   virtual void setModel(AbcModel * model);
    00053
    00055   virtual AbcHeuristic * clone() const=0;
    00056
    00062   virtual int solution(double & objectiveValue,
    00063                        double * newSolution)=0;
    00064
    00072   virtual int solution(double & objectiveValue,
    00073                        double * newSolution,
    00074                        OsiCuts & cs) {return 0;}
    00075
    00076 protected:
    00077
    00079   AbcModel * model_;
    00080 private:
    00081
    00083   AbcHeuristic & operator=(const AbcHeuristic& rhs);
    00084
    00085 };
    00086
    00090 class AbcRounding : public AbcHeuristic {
    00091 public:
    00092
    00093   // Default Constructor
    00094   AbcRounding ();
    00095
    00096   // Constructor with model - assumed before cuts
    00097   AbcRounding (AbcModel & model);
    00098
    00099   // Copy constructor
    00100   AbcRounding ( const AbcRounding &);
    00101
    00102   // Destructor
    00103   ~AbcRounding ();
    00104
    00106   virtual AbcHeuristic * clone() const;
    00107
    00109   virtual void setModel(AbcModel * model);
    00110
    00116   virtual int solution(double & objectiveValue,
    00117                        double * newSolution);
    00118
    00119
    00121   void setSeed(int value)
    00122   { seed_ = value;}
    00123
    00124 protected:
    00125   // Data
    00126
    00127   // Original matrix by column
    00128   CoinPackedMatrix matrix_;
    00129
    00130   // Original matrix by
    00131   CoinPackedMatrix matrixByRow_;
    00132
    00133   // Seed for random stuff
    00134   int seed_;
    00135
    00136 private:
    00138   AbcRounding & operator=(const AbcRounding& rhs);
    00139 };
    00140
    00141
    00142 #endif
    00143