SplitStrategy.h

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/* Frobby: Software for monomial ideal computations.
   Copyright (C) 2007 Bjarke Hammersholt Roune (www.broune.com)
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see http://www.gnu.org/licenses/.
*/
#ifndef SPLIT_STRATEGY_GUARD
#define SPLIT_STRATEGY_GUARD
 
class Term;
class Slice;
class Ideal;
class TermGrader;
 
class SplitStrategy {
 public:
  virtual ~SplitStrategy();
 
  virtual void getPivot(Term& pivot, Slice& slice) const = 0;
 
  virtual void getPivot(Term& pivot, Slice& slice, const TermGrader& grader) const = 0;
 
  virtual size_t getLabelSplitVariable(const Slice& slice) const = 0;
 
  virtual bool isPivotSplit() const = 0;
 
  virtual bool isLabelSplit() const = 0;
 
  virtual const char* getName() const = 0;
 
  static auto_ptr<SplitStrategy> createStrategy(const string& prefix);
 
 protected:
  SplitStrategy();
 
  // To make these inaccessible. They are not implemented.
  SplitStrategy(const SplitStrategy&);
  SplitStrategy& operator=(const SplitStrategy&);
  bool operator==(const SplitStrategy&);
};
 
#endif