LC.h

// LC.h -- The LC (Local Changes) decomposition algorithm interface.

/*
 * Copyright (C) 2003 Tudor Hulubei <tudor@hulubei.net>.
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2, or (at
 * your option) any later version.
 *
 * This library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA,
 * 02111-1307, USA.
 */

// $Id: LC_8h-source.html,v 1.1 2005/05/25 12:37:18 tudor Exp $

#ifndef _CSP_DECOMPOSITIONS_LC_H
#define _CSP_DECOMPOSITIONS_LC_H


CSP_NAMESPACE_BEGIN(csp);
CSP_NAMESPACE_BEGIN(decompositions);


class CSP_API LC :
    public Decomposition
{
  public:
    LC(Problem& problem,
       Filter& filter,
       Retraction& retraction,
       Randomizer& randomizer);

    ~LC();

  protected:
    LC(const wstring& fullName,
       const wstring& shortName,
       Problem& problem,
       Filter& filter,
       Retraction& retraction,
       Randomizer& randomizer) :
        Decomposition(
            fullName,
            shortName,
            problem,
            filter,
            retraction,
            randomizer),
        m_mcExtension(false) {}

    bool m_mcExtension;

  private:
    LC(const LC&);

    LC& operator=(const LC&);

    virtual bool init();

    virtual void decompose();

    void addUncertainVariable(Variable& variable);

    void assignUncertainVariables(int depth);

    void unassignUncertainVariables(int depth);

    void getConsistentUncertainVariables(
        Variable& variable,
        vlist_type& consistentUncertainVariables);

    bool propagateWithUncertainVariables(Variable& variable);

    bool propagateWithInstantiatedVariables(Variable& variable);

    void selectUncertainVariables();

    bool searchSubProblem(Variable& variable);

    bool mcPropagation(Variable& variable, Domain& failed);

    int decomposeVariable(Variable& variable);

    bool decomposeValue(Variable& variable);

    vector<vlist_type> m_uncertainVariables;

    typedef hash_map<Variable*, Value*> vv_type;

    vv_type m_uncertainValues;
};


CSP_NAMESPACE_END(decompositions);
CSP_NAMESPACE_END(csp);


#endif // _CSP_DECOMPOSITIONS_LC_H

// Local Variables:
// mode: C++
// End:

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