hyperrowcolgraph.h

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*                                                                           */
/*                  This file is part of the program                         */
/*          GCG --- Generic Column Generation                                */
/*                  a Dantzig-Wolfe decomposition based extension            */
/*                  of the branch-cut-and-price framework                    */
/*         SCIP --- Solving Constraint Integer Programs                      */
/*                                                                           */
/* Copyright (C) 2010-2021 Operations Research, RWTH Aachen University       */
/*                         Zuse Institute Berlin (ZIB)                       */
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/* This program is free software; you can redistribute it and/or             */
/* modify it under the terms of the GNU Lesser General Public License        */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             */
/* GNU Lesser General Public License for more details.                       */
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
/**@file   hyperrowcolgraph.h
 * @brief  A hypergraph with row and column nodes
 * @author Martin Bergner
 */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#ifndef GCG_HYPERROWCOLGRAPH_H_
#define GCG_HYPERROWCOLGRAPH_H_
 
#include "matrixgraph.h"
#include "hypergraph.h"
#include "class_partialdecomp.h"
#include "class_detprobdata.h"
 
namespace gcg {
template <class T>
class HyperrowcolGraph: public MatrixGraph<T>
{
private:
   Graph<T> graph;
public:
   HyperrowcolGraph(
         SCIP*                 scip,              /**< SCIP data structure */
         Weights               w                  /**< weights for the given graph */
      );
   virtual ~HyperrowcolGraph();
 
   SCIP_RETCODE createFromMatrix(
      SCIP_CONS**           conss,              /**< constraints for which graph should be created */
      SCIP_VAR**            vars,               /**< variables for which graph should be created */
      int                   nconss,             /**< number of constraints */
      int                   nvars               /**< number of variables */
      );
 
   /** creates a graph with open constraints and open variables of the partialdec */
   virtual SCIP_RETCODE createFromPartialMatrix(
      DETPROBDATA*          detprobdata,        /**< detection process information and data */
      PARTIALDECOMP*        partialdec          /**< partial decomposition to use for matrix */
      );
 
   /** writes the graph to the given file.
    *  The format is graph dependent
    */
   virtual SCIP_RETCODE writeToFile(
      int                fd,                  /**< file descriptor where the graph should be written to */
      SCIP_Bool          writeweights         /**< whether to write weights */
    );
 
 
   virtual SCIP_RETCODE createDecompFromPartition(
      DEC_DECOMP**       decomp              /**< decomposition structure to generate */
      );
 
   /** creates a new partialdec by dint of a graph created with all constraints and variables */
   virtual SCIP_RETCODE createPartialdecFromPartition(
      PARTIALDECOMP**      firstpartialdec,         /**< pointer to buffer the new partialdec created by dint of the graph */
      PARTIALDECOMP**      secondpartialdec,        /**< pointer to buffer the new partialdec whose border is amplified by dint of the graph */
      DETPROBDATA*         detprobdata              /**< detection process information and data */
      );
 
   /** amplifies a partialdec by dint of a graph created with open constraints and open variables of the partialdec */
   virtual SCIP_RETCODE createPartialdecFromPartition(
      PARTIALDECOMP*      oldpartialdec,            /**< partialdec which should be amplifies */
      PARTIALDECOMP**     firstpartialdec,          /**< pointer to buffer the new partialdec amplified by dint of the graph */
      PARTIALDECOMP**     secondpartialdec,         /**< pinter to buffer the new partialdec whose border is amplified by dint of the graph */
      DETPROBDATA*        detprobdata               /**< detection process information and data */
      );
 
   /**
    * reads the partition from the given file.
    * The format is graph dependent. The default is a file with one line for each node a
    */
   virtual SCIP_RETCODE readPartition(
      const char*        filename            /**< filename where the partition is stored */
   );
 
   virtual std::vector<int> getNeighbors(
         int i
      );
 
   virtual std::vector<int> getHyperedgeNodes(
         int i
      );
 
   std::vector<int> getConsNonzeroNodes(
         int i
   );
 
   std::vector<int> getVarNonzeroNodes(
         int i
   );
 
};
 
} /* namespace gcg */
#endif /* GCG_HYPERROWCOLGRAPH_H_ */