DiscreteFactor.h

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/* ----------------------------------------------------------------------------

 * GTSAM Copyright 2010, Georgia Tech Research Corporation,
 * Atlanta, Georgia 30332-0415
 * All Rights Reserved
 * Authors: Frank Dellaert, et al. (see THANKS for the full author list)

 * See LICENSE for the license information

 * -------------------------------------------------------------------------- */

#pragma once

#include <gtsam/discrete/Assignment.h>
#include <gtsam/inference/Factor.h>
#include <gtsam/base/Testable.h>

namespace gtsam {

class DecisionTreeFactor;
class DiscreteConditional;

class GTSAM_EXPORT DiscreteFactor: public Factor {

public:

  // typedefs needed to play nice with gtsam
  typedef DiscreteFactor This; 
  typedef boost::shared_ptr<DiscreteFactor> shared_ptr; 
  typedef Factor Base; 

  typedef Assignment<Key> Values;
  typedef boost::shared_ptr<Values> sharedValues;

public:


  DiscreteFactor() {}

  template<typename CONTAINER>
  DiscreteFactor(const CONTAINER& keys) : Base(keys) {}

  virtual ~DiscreteFactor() {
  }


  // equals
  virtual bool equals(const DiscreteFactor& lf, double tol = 1e-9) const = 0;

  // print
  virtual void print(const std::string& s = "DiscreteFactor\n",
      const KeyFormatter& formatter = DefaultKeyFormatter) const {
    Factor::print(s, formatter);
  }

  virtual bool empty() const { return size() == 0; }


  virtual double operator()(const Values&) const = 0;

  virtual DecisionTreeFactor operator*(const DecisionTreeFactor&) const = 0;

  virtual DecisionTreeFactor toDecisionTreeFactor() const = 0;

};
// DiscreteFactor

// traits
template<> struct traits<DiscreteFactor> : public Testable<DiscreteFactor> {};
template<> struct traits<DiscreteFactor::Values> : public Testable<DiscreteFactor::Values> {};

}// namespace gtsam