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# /home/coin/svn-release/Blis-0.94.1/Bcps/examples/Blis/BlisHeuristic.h

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    00001 /*===========================================================================*
    00002  * This file is part of the Bcps Linear Solver (BLIS).                       *
    00003  *                                                                           *
    00004  * BLIS 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  * Corporation, Lehigh University, Yan Xu, Ted Ralphs, Matthew Salzman and   *
    00021  * others. All Rights Reserved.                                              *
    00022  *===========================================================================*/
    00023
    00024
    00025 //#############################################################################
    00026 // This file is modified from COIN/Cbc/CbcHeuristic.hpp
    00027 //#############################################################################
    00028
    00029
    00030 #ifndef BlisHeuristic_h_
    00031 #define BlisHeuristic_h_
    00032
    00033 #include <string>
    00034 #include <vector>
    00035
    00036 #include "CoinPackedMatrix.hpp"
    00037 #include "OsiCuts.hpp"
    00038
    00039 class BlisModel;
    00040
    00041
    00042 //#############################################################################
    00043
    00044
    00046 class BlisHeuristic {
    00047
    00048  private:
    00049
    00051     BlisHeuristic & operator = (const BlisHeuristic& rhs);
    00052
    00053  protected:
    00054
    00056     BlisModel *model_;
    00057
    00059     char *name_;
    00060
    00067     int strategy_;
    00068
    00070     int numSolutions_;
    00071
    00073     double time_;
    00074
    00076     int calls_;
    00077
    00078  public:
    00079
    00081     BlisHeuristic() {
    00082         model_ = NULL;
    00083         name_ = strdup("Unknown");
    00084         strategy_ = 0;
    00085         numSolutions_ = 0;
    00086         time_ = 0.0;
    00087         calls_ = 0;
    00088     }
    00089
    00091     BlisHeuristic(BlisModel *model, const char *name, int strategy) {
    00092         model_ = model;
    00093         if (name) {
    00094             name_ = strdup(name);
    00095         }
    00096         else {
    00097             name_ = strdup("Unknown");
    00098         }
    00099         strategy_ = strategy;
    00100         numSolutions_ = 0;
    00101         time_ = 0.0;
    00102         calls_ = 0;
    00103     }
    00104
    00106     virtual ~BlisHeuristic() { if (name_) free(name_); }
    00107
    00109     BlisHeuristic(const BlisHeuristic & rhs) {
    00110         model_ = rhs.model_;
    00111         name_ = strdup(rhs.name_);
    00112         strategy_ = rhs.strategy_; // What if disabled?
    00113         numSolutions_ = 0;
    00114         time_ = 0.0;
    00115         calls_ = 0;
    00116     }
    00117
    00119     virtual void setModel(BlisModel * model) { model_ = model ;}
    00120
    00123     virtual void setStrategy(int strategy) { strategy_ = strategy; }
    00124     virtual int strategy() { return strategy_; }
    00125     //@]
    00126
    00128     virtual BlisHeuristic * clone() const = 0;
    00129
    00135     virtual bool searchSolution(double & objectiveValue,
    00136                                 double * newSolution)=0;
    00137
    00146     virtual int searchSolution(double & objectiveValue,
    00147                                double * newSolution,
    00148                                OsiCuts & cs) { return 0; }
    00149
    00151     int numSolutions() { return numSolutions_; }
    00152
    00154     inline double time() { return time_; }
    00155
    00157     inline int calls() { return calls_; }
    00158 };
    00159
    00160 #endif
    00161