include/dlvhex2/SATSolver.h

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/* dlvhex -- Answer-Set Programming with external interfaces.
 * Copyright (C) 2005-2007 Roman Schindlauer
 * Copyright (C) 2006-2015 Thomas Krennwallner
 * Copyright (C) 2009-2016 Peter Schüller
 * Copyright (C) 2011-2016 Christoph Redl
 * Copyright (C) 2015-2016 Tobias Kaminski
 * Copyright (C) 2015-2016 Antonius Weinzierl
 *
 * This file is part of dlvhex.
 *
 * dlvhex 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 2.1 of
 * the License, or (at your option) any later version.
 *
 * dlvhex 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 dlvhex; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */

#ifndef SATSOLVER_H
#define SATSOLVER_H

#include "dlvhex2/Nogood.h"
#include "dlvhex2/Interpretation.h"

DLVHEX_NAMESPACE_BEGIN

// forward declaration
class PropagatorCallback;

class ProgramCtx;

class SATSolver : virtual public NogoodContainer
{
    public:
        typedef boost::shared_ptr<SATSolver> Ptr;
        typedef boost::shared_ptr<const SATSolver> ConstPtr;

        virtual void restartWithAssumptions(const std::vector<ID>& assumptions) = 0;

        virtual void addPropagator(PropagatorCallback* pb) = 0;

        virtual void removePropagator(PropagatorCallback* pb) = 0;

        virtual InterpretationPtr getNextModel() = 0;

        virtual Nogood getInconsistencyCause(InterpretationConstPtr explanationAtoms) = 0;

        virtual void addNogoodSet(const NogoodSet& ns, InterpretationConstPtr frozen = InterpretationConstPtr()) = 0;

        static Ptr getInstance(ProgramCtx& ctx, NogoodSet& ns, InterpretationConstPtr frozen = InterpretationConstPtr());
};

typedef SATSolver::Ptr SATSolverPtr;
typedef SATSolver::ConstPtr SATSolverConstPtr;

DLVHEX_NAMESPACE_END
#endif

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