include/dlvhex2/UnfoundedSetCheckHeuristicsInterface.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 UNFOUNDEDSETCHECKHEURISTICSINTERFACE_H
#define UNFOUNDEDSETCHECKHEURISTICSINTERFACE_H

#include "dlvhex2/PlatformDefinitions.h"
#include "dlvhex2/fwd.h"
#include "dlvhex2/ID.h"
#include "dlvhex2/Registry.h"
#include "dlvhex2/AnnotatedGroundProgram.h"

#include <boost/unordered_map.hpp>
#include <boost/shared_ptr.hpp>

DLVHEX_NAMESPACE_BEGIN

// ============================== Base ==============================

class DLVHEX_EXPORT UnfoundedSetCheckHeuristics
{
    protected:
        RegistryPtr reg;

        const AnnotatedGroundProgram& groundProgram;

        InterpretationPtr previouslyAssignedAndVerifiedAtoms;

        InterpretationPtr notYetVerifiedExternalAtoms;

        std::map<IDAddress, std::set<int> > rulesOfAtom;

        std::vector<int> atomsInRule, assignedAndVerifiedAtomsInRule;

        std::set<ID> skipProgram;
    public:
        UnfoundedSetCheckHeuristics(const AnnotatedGroundProgram& groundProgram, RegistryPtr reg);

        virtual bool doUFSCheck(InterpretationConstPtr verifiedAuxes, InterpretationConstPtr partialAssignment, InterpretationConstPtr assigned, InterpretationConstPtr changed) = 0;

        virtual void notify(InterpretationConstPtr verifiedAuxes, InterpretationConstPtr partialAssignment, InterpretationConstPtr assigned, InterpretationConstPtr changed);

        void updateSkipProgram(InterpretationConstPtr verifiedAuxes, InterpretationConstPtr partialAssignment, InterpretationConstPtr assigned, InterpretationConstPtr changed);

        inline const std::set<ID>& getSkipProgram() const { return skipProgram; }
};

typedef boost::shared_ptr<UnfoundedSetCheckHeuristics> UnfoundedSetCheckHeuristicsPtr;

class DLVHEX_EXPORT UnfoundedSetCheckHeuristicsFactory
{
    public:
        virtual UnfoundedSetCheckHeuristicsPtr createHeuristics(const AnnotatedGroundProgram& groundProgram, RegistryPtr reg) = 0;

        virtual ~UnfoundedSetCheckHeuristicsFactory(){}
};

typedef boost::shared_ptr<UnfoundedSetCheckHeuristicsFactory> UnfoundedSetCheckHeuristicsFactoryPtr;

DLVHEX_NAMESPACE_END
#endif

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