ExtendedNFTA.h

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/*
 * This file is part of Algorithms library toolkit.
 * Copyright (C) 2017 Jan Travnicek (jan.travnicek@fit.cvut.cz)
 
 * Algorithms library toolkit 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 3 of the License, or
 * (at your option) any later version.
 
 * Algorithms library toolkit 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 Algorithms library toolkit.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#pragma once
 
#include <ostream>
 
#include <alib/map>
#include <alib/set>
#include <alib/vector>
 
#include <core/components.hpp>
 
#include <core/normalize.hpp>
 
#include <common/DefaultStateType.h>
#include <common/DefaultSymbolType.h>
 
#include <automaton/AutomatonException.h>
 
#include <core/normalize.hpp>
#include <alphabet/common/SymbolNormalize.h>
#include <automaton/common/AutomatonNormalize.h>
 
#include <rte/formal/FormalRTEElements.h>
#include <rte/formal/FormalRTEStructure.h>
 
#include "DFTA.h"
#include "NFTA.h"
 
namespace automaton {
 
class InputAlphabet;
class States;
class FinalStates;
 
template < class SymbolType = DefaultSymbolType, class StateType = DefaultStateType >
class ExtendedNFTA final : public core::Components < ExtendedNFTA < SymbolType, StateType >, ext::set < common::ranked_symbol < SymbolType > >, component::Set, InputAlphabet, ext::set < StateType >, component::Set, std::tuple < States, FinalStates > > {
    ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, ext::set < StateType > > transitions;
 
public:
    explicit ExtendedNFTA ( );
 
    explicit ExtendedNFTA ( ext::set < StateType > states, ext::set < common::ranked_symbol < SymbolType > > inputAlphabet, ext::set < StateType > finalStates );
 
    /*
     * \brief Creates a new instance of the automaton based on the Deterministic finite tree automaton.
     *
     * \param other the Deterministic finite tree automaton
     */
    explicit ExtendedNFTA ( const DFTA < SymbolType, StateType > & other );
 
    /*
     * \brief Creates a new instance of the automaton based on the Nondeterministic finite tree automaton.
     *
     * \param other the Deterministic finite tree automaton
     */
    explicit ExtendedNFTA ( const NFTA < SymbolType, StateType > & other );
 
    const ext::set < StateType > & getStates ( ) const & {
        return this->template accessComponent < States > ( ).get ( );
    }
 
    ext::set < StateType > && getStates ( ) && {
        return std::move ( this->template accessComponent < States > ( ).get ( ) );
    }
 
    bool addState ( StateType state ) {
        return this->template accessComponent < States > ( ).add ( std::move ( state ) );
    }
 
    void setStates ( ext::set < StateType > states ) {
        this->template accessComponent < States > ( ).set ( std::move ( states ) );
    }
 
    void removeState ( const StateType & state ) {
        this->template accessComponent < States > ( ).remove ( state );
    }
 
    const ext::set < StateType > & getFinalStates ( ) const & {
        return this->template accessComponent < FinalStates > ( ).get ( );
    }
 
    ext::set < StateType > && getFinalStates ( ) && {
        return std::move ( this->template accessComponent < FinalStates > ( ).get ( ) );
    }
 
    bool addFinalState ( StateType state ) {
        return this->template accessComponent < FinalStates > ( ).add ( std::move ( state ) );
    }
 
    void setFinalStates ( ext::set < StateType > states ) {
        this->template accessComponent < FinalStates > ( ).set ( std::move ( states ) );
    }
 
    void removeFinalState ( const StateType & state ) {
        this->template accessComponent < FinalStates > ( ).remove ( state );
    }
 
    const ext::set < common::ranked_symbol < SymbolType > > & getInputAlphabet ( ) const & {
        return this->template accessComponent < InputAlphabet > ( ).get ( );
    }
 
    ext::set < common::ranked_symbol < SymbolType > > && getInputAlphabet ( ) && {
        return std::move ( this->template accessComponent < InputAlphabet > ( ).get ( ) );
    }
 
    bool addInputSymbol ( common::ranked_symbol < SymbolType > symbol ) {
        return this->template accessComponent < InputAlphabet > ( ).add ( std::move ( symbol ) );
    }
 
    void addInputSymbols ( ext::set < common::ranked_symbol < SymbolType > > symbols ) {
        this->template accessComponent < InputAlphabet > ( ).add ( std::move ( symbols ) );
    }
 
    void setInputAlphabet ( ext::set < common::ranked_symbol < SymbolType > > symbols ) {
        this->template accessComponent < InputAlphabet > ( ).set ( std::move ( symbols ) );
    }
 
    void removeInputSymbol ( const common::ranked_symbol < SymbolType > & symbol ) {
        this->template accessComponent < InputAlphabet > ( ).remove ( symbol );
    }
 
    bool addTransition ( rte::FormalRTEStructure < ext::variant < SymbolType, StateType > > rte, ext::vector < StateType >, StateType next );
 
    void addTransitions ( rte::FormalRTEStructure < ext::variant < SymbolType, StateType > > rte, ext::vector < StateType >, ext::set < StateType > next );
 
    bool removeTransition ( const rte::FormalRTEStructure < ext::variant < SymbolType, StateType > > & rte, const ext::vector < StateType > & prevStates, const StateType& next );
 
    const ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, ext::set < StateType > > & getTransitions ( ) const & {
        return transitions;
    }
 
    ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, ext::set < StateType > > && getTransitions ( ) && {
        return std::move ( transitions );
    }
 
    ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, StateType > getTransitionsToState ( const StateType & to ) const;
 
    ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, ext::set < StateType > > getTransitionsFromState ( const StateType & from ) const;
 
    bool isDeterministic ( ) const;
 
    unsigned transitionsSize ( ) const;
 
    auto operator <=> ( const ExtendedNFTA & other ) const {
        return std::tie(getStates(), getInputAlphabet(), getFinalStates(), transitions) <=> std::tie(other.getStates(), other.getInputAlphabet(), other.getFinalStates(), other.transitions);
    }
 
    bool operator == ( const ExtendedNFTA & other ) const {
        return std::tie(getStates(), getInputAlphabet(), getFinalStates(), transitions) == std::tie(other.getStates(), other.getInputAlphabet(), other.getFinalStates(), other.transitions);
    }
 
    friend ext::ostream & operator << ( ext::ostream & out, const ExtendedNFTA & instance ) {
        return out << "(ExtendedNFTA"
               << " states = " << instance.getStates ( )
               << " inputAlphabet = " << instance.getInputAlphabet ( )
               << " finalStates = " << instance.getFinalStates ( )
               << " transitions = " << instance.getTransitions ( )
               << ")";
    }
};
 
template < class SymbolType, class StateType >
ExtendedNFTA < SymbolType, StateType >::ExtendedNFTA ( ext::set < StateType > states, ext::set < common::ranked_symbol < SymbolType > > inputAlphabet, ext::set < StateType > finalStates ) : core::Components < ExtendedNFTA, ext::set < common::ranked_symbol < SymbolType > >, component::Set, InputAlphabet, ext::set < StateType >, component::Set, std::tuple < States, FinalStates > > ( std::move ( inputAlphabet ), std::move ( states ), std::move ( finalStates ) ) {
}
 
template < class SymbolType, class StateType >
ExtendedNFTA < SymbolType, StateType >::ExtendedNFTA() : ExtendedNFTA ( ext::set < StateType > { }, ext::set < common::ranked_symbol < SymbolType > > { }, ext::set < StateType > { } ) {
}
 
template < class SymbolType, class StateType >
ExtendedNFTA < SymbolType, StateType >::ExtendedNFTA(const DFTA < SymbolType, StateType > & other) : ExtendedNFTA ( other.getStates(), other.getInputAlphabet(), other.getFinalStates() ) {
    for ( const auto & transition : other.getTransitions ( ) ) {
        // ( symbol, prevStates ) -> nextState
        // ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, ext::set < StateType > > transitions;
 
        ext::ptr_vector < rte::FormalRTEElement < ext::variant < SymbolType, StateType > > > children;
        for ( const StateType & state : transition.first.second )
            children.push_back ( rte::FormalRTESymbolSubst < ext::variant < SymbolType, StateType > > ( common::ranked_symbol < ext::variant < SymbolType, StateType > > ( state, 0 ) ) );
 
        common::ranked_symbol < ext::variant < SymbolType, StateType > > symbol ( transition.first.first.getSymbol ( ), transition.first.first.getRank ( ) );
        rte::FormalRTEStructure < ext::variant < SymbolType, StateType > > rte ( rte::FormalRTESymbolAlphabet < ext::variant < SymbolType, StateType > > ( symbol, children ) );
        transitions [ ext::make_pair ( rte, transition.first.second ) ].insert ( transition.second );
    }
}
 
template < class SymbolType, class StateType >
ExtendedNFTA < SymbolType, StateType >::ExtendedNFTA(const NFTA < SymbolType, StateType > & other) : ExtendedNFTA ( other.getStates(), other.getInputAlphabet(), other.getFinalStates() ) {
    for ( const auto & transition : other.getTransitions ( ) ) {
        // ( symbol, prevStates ) -> nextState
        // ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, ext::set < StateType > > transitions;
 
        ext::ptr_vector < rte::FormalRTEElement < ext::variant < SymbolType, StateType > > > children;
        for ( const StateType & state : transition.first.second )
            children.push_back ( rte::FormalRTESymbolSubst < ext::variant < SymbolType, StateType > > ( common::ranked_symbol < ext::variant < SymbolType, StateType > > ( state, 0 ) ) );
 
        common::ranked_symbol < ext::variant < SymbolType, StateType > > symbol ( transition.first.first.getSymbol ( ), transition.first.first.getRank ( ) );
        rte::FormalRTEStructure < ext::variant < SymbolType, StateType > > rte ( rte::FormalRTESymbolAlphabet < ext::variant < SymbolType, StateType > > ( symbol, children ) );
        transitions [ ext::make_pair ( rte, transition.first.second ) ].insert ( transition.second );
    }
}
 
template < class SymbolType, class StateType >
bool ExtendedNFTA < SymbolType, StateType >::addTransition ( rte::FormalRTEStructure < ext::variant < SymbolType, StateType > > rte, ext::vector < StateType > prevStates, StateType next ) {
    /*
    if (prevStates.size() != symbol.getRank() )
        throw AutomatonException("Number of states doesn't match rank of the symbol");
 
    if (! getInputAlphabet().count(symbol))
        throw AutomatonException("Input symbol \"" + ext::to_string ( symbol ) + "\" doesn't exist.");
    */
 
    if (! getStates().count(next))
        throw AutomatonException("State \"" + ext::to_string ( next ) + "\" doesn't exist.");
 
    for (const StateType& it : prevStates) {
        if (! getStates().count(it))
            throw AutomatonException("State \"" + ext::to_string ( it ) + "\" doesn't exist.");
    }
 
    ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > > key = ext::make_pair ( std::move ( rte ), std::move ( prevStates ) );
    return transitions [ std::move ( key ) ].insert ( std::move ( next ) ).second;
}
 
template < class SymbolType, class StateType >
void ExtendedNFTA < SymbolType, StateType >::addTransitions ( rte::FormalRTEStructure < ext::variant < SymbolType, StateType > > rte, ext::vector < StateType > prevStates, ext::set < StateType > next ) {
    /*
    if (prevStates.size() != symbol.getRank() )
        throw AutomatonException("Number of states doesn't match rank of the symbol");
 
    if (! getInputAlphabet().count(symbol))
        throw AutomatonException("Input symbol \"" + ext::to_string ( symbol ) + "\" doesn't exist.");
    */
 
    if ( !std::includes ( getStates ( ).begin ( ), getStates ( ).end ( ), next.begin ( ), next.end ( ) ) )
        throw AutomatonException ( "Some target states don't exist." );
 
    for (const StateType& it : prevStates) {
        if (! getStates().count(it))
            throw AutomatonException("State \"" + ext::to_string ( it ) + "\" doesn't exist.");
    }
 
    ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > > key = ext::make_pair ( std::move ( rte ), std::move ( prevStates ) );
    transitions [ std::move ( key ) ].insert ( ext::make_mover ( next ).begin ( ), ext::make_mover ( next ).end ( ) );
}
 
template < class SymbolType, class StateType >
bool ExtendedNFTA < SymbolType, StateType >::removeTransition ( const rte::FormalRTEStructure < ext::variant < SymbolType, StateType > > & rte, const ext::vector < StateType > & prevStates, const StateType& next ) {
    ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > > key = ext::make_pair ( rte, prevStates );
    return transitions [ key ].erase ( next );
}
 
template < class SymbolType, class StateType >
bool ExtendedNFTA < SymbolType, StateType >::isDeterministic() const {
    return false;
}
 
 
template < class SymbolType, class StateType >
unsigned ExtendedNFTA < SymbolType, StateType >::transitionsSize() const {
    int res = 0;
 
    for(const auto& transition : transitions )
        res += transition.second.size();
 
    return res;
}
 
template<class SymbolType, class StateType >
ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, StateType > ExtendedNFTA < SymbolType, StateType >::getTransitionsToState ( const StateType & to ) const {
    if ( !getStates ( ).count ( to ) )
        throw AutomatonException ( "State \"" + ext::to_string ( to ) + "\" doesn't exist" );
 
    ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, StateType > res;
 
    for ( const auto & transition : transitions )
        if ( transition.second.count ( to ) > 0 )
            res.insert ( ext::make_pair ( transition.first, to ) );
 
    return res;
}
 
template<class SymbolType, class StateType >
ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, ext::set < StateType > > ExtendedNFTA < SymbolType, StateType >::getTransitionsFromState ( const StateType & from ) const {
    if ( !getStates ( ).count ( from ) )
        throw AutomatonException ( "State \"" + ext::to_string ( from ) + "\" doesn't exist" );
 
    ext::map < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, ext::set < StateType > > res;
 
    for ( const auto & transition : transitions )
        if ( std::find ( transition.first.second.begin ( ), transition.first.second.end ( ), from ) != transition.first.second.end ( ) )
            res.insert ( transition );
 
    return res;
}
 
} /* namespace automaton */
 
namespace core {
 
template < class SymbolType, class StateType >
class SetConstraint< automaton::ExtendedNFTA < SymbolType, StateType >, common::ranked_symbol < SymbolType >, automaton::InputAlphabet > {
public:
    static bool used ( const automaton::ExtendedNFTA < SymbolType, StateType > & /*automaton*/, const common::ranked_symbol < SymbolType > & /*symbol*/ ) {
/*      for ( const std::pair<const ext::pair<rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector<StateType> >, ext::set<StateType>>& t : automaton.getTransitions())
            if (t.first.first == symbol)
                return true;
 
        return false;*/
        return true; // TODO
    }
 
    static bool available ( const automaton::ExtendedNFTA < SymbolType, StateType > &, const common::ranked_symbol < SymbolType > & ) {
        return true;
    }
 
    static void valid ( const automaton::ExtendedNFTA < SymbolType, StateType > &, const common::ranked_symbol < SymbolType > & ) {
    }
};
 
template < class SymbolType, class StateType >
class SetConstraint< automaton::ExtendedNFTA < SymbolType, StateType >, StateType, automaton::States > {
public:
    static bool used ( const automaton::ExtendedNFTA < SymbolType, StateType > & automaton, const StateType & state ) {
        if ( automaton.getFinalStates ( ).count ( state ) )
            return true;
 
        for ( const std::pair<const ext::pair<rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector<StateType> >, ext::set<StateType>>& t : automaton.getTransitions())
            if(ext::contains(t.first.second.begin(), t.first.second.end(), state ) || t . second.count ( state ) )
                return true;
 
        return false;
    }
 
    static bool available ( const automaton::ExtendedNFTA < SymbolType, StateType > &, const StateType & ) {
        return true;
    }
 
    static void valid ( const automaton::ExtendedNFTA < SymbolType, StateType > &, const StateType & ) {
    }
};
 
template < class SymbolType, class StateType >
class SetConstraint< automaton::ExtendedNFTA < SymbolType, StateType >, StateType, automaton::FinalStates > {
public:
    static bool used ( const automaton::ExtendedNFTA < SymbolType, StateType > &, const StateType & ) {
        return false;
    }
 
    static bool available ( const automaton::ExtendedNFTA < SymbolType, StateType > & automaton, const StateType & state ) {
        return automaton.template accessComponent < automaton::States > ( ).get ( ).count ( state );
    }
 
    static void valid ( const automaton::ExtendedNFTA < SymbolType, StateType > &, const StateType & ) {
    }
};
 
template < class SymbolType, class StateType >
struct normalize < automaton::ExtendedNFTA < SymbolType, StateType > > {
    static automaton::ExtendedNFTA < > eval ( automaton::ExtendedNFTA < SymbolType, StateType > && value ) {
        ext::set < common::ranked_symbol < > > alphabet = alphabet::SymbolNormalize::normalizeRankedAlphabet ( std::move ( value ).getInputAlphabet ( ) );
        ext::set < DefaultStateType > states = automaton::AutomatonNormalize::normalizeStates ( std::move ( value ).getStates ( ) );
        ext::set < DefaultStateType > finalStates = automaton::AutomatonNormalize::normalizeStates ( std::move ( value ).getFinalStates ( ) );
 
        automaton::ExtendedNFTA < > res ( std::move ( states ), std::move ( alphabet ), std::move ( finalStates ) );
 
        for ( std::pair < ext::pair < rte::FormalRTEStructure < ext::variant < SymbolType, StateType > >, ext::vector < StateType > >, ext::set < StateType > > && transition : ext::make_mover ( std::move ( value ).getTransitions ( ) ) ) {
            rte::FormalRTEStructure < ext::variant < SymbolType, StateType > > rte = transition.first.first; // TODO alphabet::SymbolNormalize::normalizeRankedSymbol ( std::move ( transition.first.first ) );
            ext::vector < DefaultStateType > from = automaton::AutomatonNormalize::normalizeStates ( std::move ( transition.first.second ) );
            ext::set < DefaultStateType > to = automaton::AutomatonNormalize::normalizeStates ( std::move ( transition.second ) );
 
            res.addTransitions ( std::move ( rte ), std::move ( from ), std::move ( to ) );
        }
 
        return res;
    }
};
 
} /* namespace core */
 
extern template class automaton::ExtendedNFTA < >;