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+// $Id: CbcBranchDecision.hpp 1899 2013-04-09 18:12:08Z stefan $
+// Copyright (C) 2002, International Business Machines
+// Corporation and others.  All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+
+// Edwin 11/12/2009 carved from CbcBranchBase
+
+#ifndef CbcBranchDecision_H
+#define CbcBranchDecision_H
+
+#include "CbcBranchBase.hpp"
+
+/** Abstract branching decision base class
+
+  In the abstract, an CbcBranchDecision object is expected to be able to
+  compare two possible branching choices.
+
+  The #betterBranch() method is the crucial routine. It is expected to be able
+  to compare two \link CbcBranchingObject CbcBranchingObjects \endlink.
+
+  See CbcObject for an overview of the three classes (CbcObject,
+  CbcBranchingObject, and CbcBranchDecision) which make up cbc's branching
+  model.
+*/
+class CbcModel;
+class OsiChooseVariable;
+
+class CbcBranchDecision {
+public:
+    /// Default Constructor
+    CbcBranchDecision ();
+
+    // Copy constructor
+    CbcBranchDecision ( const CbcBranchDecision &);
+
+    /// Destructor
+    virtual ~CbcBranchDecision();
+
+/// Clone
+    virtual CbcBranchDecision * clone() const = 0;
+
+    /// Initialize <i>e.g.</i> before starting to choose a branch at a node
+    virtual void initialize(CbcModel * model) = 0;
+
+    /** \brief Compare two branching objects. Return nonzero if branching
+           using \p thisOne is better than branching using \p bestSoFar.
+
+      If \p bestSoFar is NULL, the routine should return a nonzero value.
+      This routine is used only after strong branching.
+      Either this or bestBranch is used depending which user wants.
+
+    */
+
+    virtual int
+    betterBranch (CbcBranchingObject * thisOne,
+                  CbcBranchingObject * bestSoFar,
+                  double changeUp, int numberInfeasibilitiesUp,
+                  double changeDown, int numberInfeasibilitiesDown) = 0 ;
+
+    /** \brief Compare N branching objects. Return index of best
+        and sets way of branching in chosen object.
+
+      Either this or betterBranch is used depending which user wants.
+    */
+
+    virtual int
+    bestBranch (CbcBranchingObject ** objects, int numberObjects, int numberUnsatisfied,
+                double * changeUp, int * numberInfeasibilitiesUp,
+                double * changeDown, int * numberInfeasibilitiesDown,
+                double objectiveValue) ;
+
+    /** Says whether this method can handle both methods -
+        1 better, 2 best, 3 both */
+    virtual int whichMethod() {
+        return 2;
+    }
+
+    /** Saves a clone of current branching object.  Can be used to update
+        information on object causing branch - after branch */
+    virtual void saveBranchingObject(OsiBranchingObject * ) {}
+    /** Pass in information on branch just done.
+        assumes object can get information from solver */
+    virtual void updateInformation(OsiSolverInterface * ,
+                                   const CbcNode * ) {}
+    /** Sets or gets best criterion so far */
+    virtual void setBestCriterion(double ) {}
+    virtual double getBestCriterion() const {
+        return 0.0;
+    }
+    /// Create C++ lines to get to current state
+    virtual void generateCpp( FILE * ) {}
+    /// Model
+    inline CbcModel * cbcModel() const {
+        return model_;
+    }
+    /* If chooseMethod_ id non-null then the rest is fairly pointless
+       as choosemethod_ will be doing all work
+     This comment makes more sense if you realise that there's a conversion in
+     process from the Cbc branching classes to Osi branching classes. The test
+     for use of the Osi branching classes is CbcModel::branchingMethod_
+     non-null (i.e., it points to one of these CbcBranchDecision objects) and
+     that branch decision object has an OsiChooseVariable method set. In which
+     case, we'll use it, rather than the choose[*]Variable methods defined in
+     CbcNode.
+	*/
+
+    OsiChooseVariable * chooseMethod() const {
+        return chooseMethod_;
+    }
+    /// Set (clone) chooseMethod
+    void setChooseMethod(const OsiChooseVariable & method);
+
+protected:
+
+    // Clone of branching object
+    CbcBranchingObject * object_;
+    /// Pointer to model
+    CbcModel * model_;
+    /* If chooseMethod_ id non-null then the rest is fairly pointless
+       as choosemethod_ will be doing all work
+    */
+    OsiChooseVariable * chooseMethod_;
+private:
+    /// Assignment is illegal
+    CbcBranchDecision & operator=(const CbcBranchDecision& rhs);
+
+};
+#endif
+