iti.h

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/***************************************************************************
 *   Copyright (C) 2005 by Christophe GONZALES and Pierre-Henri WUILLEMIN  *
 *   {prenom.nom}_at_lip6.fr                                               *
 *                                                                         *
 *   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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
// =========================================================================
#ifndef GUM_ITI_H
#define GUM_ITI_H
// =========================================================================
#include <agrum/core/multiPriorityQueue.h>
// =========================================================================
#include <agrum/multidim/implementations/multiDimFunctionGraph.h>
// =========================================================================
#include <agrum/FMDP/learning/core/templateStrategy.h>
#include <agrum/FMDP/learning/datastructure/incrementalGraphLearner.h>
// =========================================================================
#include <agrum/variables/discreteVariable.h>
// =========================================================================

namespace gum {

  template < TESTNAME AttributeSelection, bool isScalar = false >
  class ITI : public IncrementalGraphLearner< AttributeSelection, isScalar > {
    public:
    // ###################################################################
    // ###################################################################

    // ==========================================================================
    // ==========================================================================
    ITI(MultiDimFunctionGraph< double >* target,
        double                           attributeSelectionThreshold,
        Set< const DiscreteVariable* >   attributeListe,
        const DiscreteVariable*          learnedValue);

    // ==========================================================================
    // ==========================================================================
    ITI(MultiDimFunctionGraph< double >* target,
        double                           attributeSelectionThreshold,
        Set< const DiscreteVariable* >   attributeListe);

    // ==========================================================================
    // ==========================================================================
    ~ITI() { GUM_DESTRUCTOR(ITI); }


    // ###################################################################
    // ###################################################################
    public:
    // ==========================================================================
    // ==========================================================================
    void addObservation(const Observation* obs);

    protected:
    // ==========================================================================
    // ==========================================================================
    void _updateNodeWithObservation(const Observation* newObs,
                                    NodeId             currentNodeId);


    // ###################################################################
    // ###################################################################
    public:
    // ==========================================================================
    // ==========================================================================
    void updateGraph();

    protected:
    // ==========================================================================
    // ==========================================================================
    NodeId _insertNode(NodeDatabase< AttributeSelection, isScalar >* nDB,
                       const DiscreteVariable*                       boundVar);

    // ==========================================================================
    // ==========================================================================
    void _chgNodeBoundVar(NodeId chgedNodeId, const DiscreteVariable* desiredVar);

    // ==========================================================================
    // ==========================================================================
    void _removeNode(NodeId removedNodeId);


    public:
    // ###################################################################
    // ###################################################################

    // ==========================================================================
    // ==========================================================================
    void updateFunctionGraph();

    private:
    // ==========================================================================
    // ==========================================================================
    NodeId __insertNodeInFunctionGraph(NodeId src);

    // ==========================================================================
    // ==========================================================================
    NodeId __insertTerminalNode(NodeId src) {
      return __insertTerminalNode(src, Int2Type< isScalar >());
    }

    // ==========================================================================
    // ==========================================================================
    NodeId __insertTerminalNode(NodeId src, Int2Type< true >);

    // ==========================================================================
    // ==========================================================================
    NodeId __insertTerminalNode(NodeId src, Int2Type< false >);



    protected:
    // ==========================================================================
    // ==========================================================================
    void _insertSetOfVars(MultiDimFunctionGraph< double >* ret) {
      for (SetIteratorSafe< const DiscreteVariable* > varIter =
              this->_setOfVars.beginSafe();
           varIter != this->_setOfVars.endSafe();
           ++varIter)
        ret->add(**varIter);
    }

    private:
    HashTable< NodeId, bool > __staleTable;

    Idx __nbTotalObservation;

    double __attributeSelectionThreshold;
  };


} /* namespace gum */

#include <agrum/FMDP/learning/datastructure/iti_tpl.h>

#endif   // GUM_ITI_H