EpsilonNFA.h

Go to the documentation of this file.

 
/*
 * 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 <core/xmlApi.hpp>
#include <automaton/FSM/EpsilonNFA.h>
#include "../common/AutomatonFromXMLParser.h"
#include "../common/AutomatonToXMLComposer.h"
 
namespace core {
 
template < class SymbolType, class StateType >
struct xmlApi < automaton::EpsilonNFA < SymbolType, StateType > > {
    static std::string xmlTagName() {
        return "EpsilonNFA";
    }
 
    static bool first ( const ext::deque < sax::Token >::const_iterator & input ) {
        return sax::FromXMLParserHelper::isToken ( input, sax::Token::TokenType::START_ELEMENT, xmlTagName ( ) );
    }
 
    static automaton::EpsilonNFA < SymbolType, StateType > parse ( ext::deque < sax::Token >::iterator & input );
 
    static void parseTransition ( ext::deque < sax::Token >::iterator & input, automaton::EpsilonNFA < SymbolType, StateType > & automaton );
 
    static void compose ( ext::deque < sax::Token > & out, const automaton::EpsilonNFA < SymbolType, StateType > & automaton );
 
    static void composeTransitions ( ext::deque < sax::Token > & out, const automaton::EpsilonNFA < SymbolType, StateType > & automaton );
};
 
template < class SymbolType, class StateType >
automaton::EpsilonNFA < SymbolType, StateType > xmlApi < automaton::EpsilonNFA < SymbolType, StateType > >::parse ( ext::deque < sax::Token >::iterator & input ) {
    sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::START_ELEMENT, xmlTagName ( ) );
 
    ext::set < StateType > states = automaton::AutomatonFromXMLParser::parseStates < StateType > ( input );
    ext::set < SymbolType > inputSymbols = automaton::AutomatonFromXMLParser::parseInputAlphabet < SymbolType > ( input );
    StateType initialState = automaton::AutomatonFromXMLParser::parseInitialState < StateType > ( input );
    ext::set < StateType > finalStates = automaton::AutomatonFromXMLParser::parseFinalStates < StateType > ( input );
 
    automaton::EpsilonNFA < SymbolType, StateType > automaton ( std::move ( initialState ) );
 
    automaton.setStates ( std::move ( states ) );
    automaton.setInputAlphabet ( std::move ( inputSymbols ) );
    automaton.setFinalStates ( std::move ( finalStates ) );
 
    automaton::AutomatonFromXMLParser::parseTransitions ( input, automaton );
 
    sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::END_ELEMENT, xmlTagName() );
    return automaton;
}
 
template < class SymbolType, class StateType >
void xmlApi < automaton::EpsilonNFA < SymbolType, StateType > >::parseTransition ( ext::deque < sax::Token >::iterator & input, automaton::EpsilonNFA < SymbolType, StateType > & automaton ) {
    sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::START_ELEMENT, "transition" );
    StateType from = automaton::AutomatonFromXMLParser::parseTransitionFrom < StateType > ( input );
    common::symbol_or_epsilon < SymbolType > inputVariant = automaton::AutomatonFromXMLParser::parseTransitionInputSymbol < common::symbol_or_epsilon < SymbolType > > ( input );
    StateType to = automaton::AutomatonFromXMLParser::parseTransitionTo < StateType > ( input );
    sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::END_ELEMENT, "transition" );
 
    automaton.addTransition ( std::move ( from ), std::move ( inputVariant ), std::move ( to ) );
}
 
template < class SymbolType, class StateType >
void xmlApi < automaton::EpsilonNFA < SymbolType, StateType > >::compose ( ext::deque < sax::Token > & out, const automaton::EpsilonNFA < SymbolType, StateType > & automaton ) {
    out.emplace_back ( xmlTagName ( ), sax::Token::TokenType::START_ELEMENT );
 
    automaton::AutomatonToXMLComposer::composeStates ( out, automaton.getStates ( ) );
    automaton::AutomatonToXMLComposer::composeInputAlphabet ( out, automaton.getInputAlphabet ( ) );
    automaton::AutomatonToXMLComposer::composeInitialState ( out, automaton.getInitialState ( ) );
    automaton::AutomatonToXMLComposer::composeFinalStates ( out, automaton.getFinalStates ( ) );
    composeTransitions ( out, automaton );
 
    out.emplace_back ( xmlTagName ( ), sax::Token::TokenType::END_ELEMENT );
}
 
template < class SymbolType, class StateType >
void xmlApi < automaton::EpsilonNFA < SymbolType, StateType > >::composeTransitions ( ext::deque < sax::Token > & out, const automaton::EpsilonNFA < SymbolType, StateType > & automaton ) {
    out.emplace_back ( "transitions", sax::Token::TokenType::START_ELEMENT );
 
    for ( const auto & transition : automaton.getTransitions ( ) ) {
        out.emplace_back ( "transition", sax::Token::TokenType::START_ELEMENT );
 
        automaton::AutomatonToXMLComposer::composeTransitionFrom ( out, transition.first.first );
        automaton::AutomatonToXMLComposer::composeTransitionInputSymbol ( out, transition.first.second );
        automaton::AutomatonToXMLComposer::composeTransitionTo ( out, transition.second );
 
        out.emplace_back ( "transition", sax::Token::TokenType::END_ELEMENT );
    }
 
    out.emplace_back ( "transitions", sax::Token::TokenType::END_ELEMENT );
}
 
} /* namespace core */