Helper.h

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/*
 *    scampl4cpp/engine
 *
 *    Copyright by European Southern Observatory, 2012
 *    All rights reserved
 *
 *    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 2.1 of the License, 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: Helper.h 1139 2016-07-20 14:57:28Z landolfa $
 */

#ifndef SCXML4CPP_HELPER_H
#define SCXML4CPP_HELPER_H

#ifndef __cplusplus
#error This is a C++ include file and cannot be used from plain C
#endif


#include <string>
#include <set>
#include <list>


namespace scxml4cpp {

class Transition;
class StateMachine;
class State;
class Action;
class Activity;
class Event;


class Helper
{
 public:
    Helper();
    ~Helper();

    const std::string printStateType(State* s);
    const std::string printTransition(Transition* t);
    const std::string printTransitions(std::list<Transition*>& transitions);
    const std::string printTargetState(Transition* transitions);
    const std::string printTargetStates(std::list<Transition*>& transitions);
    const std::string printActions(std::list<Action*>& actions);
    const std::string printActivities(std::list<Activity*>& activities);
    const std::string printStates(State* s);
    const std::string printStateMachine(StateMachine&);

    const std::string formatStatus(std::set<State*>& status);

    int               countParents(State*);
    bool              isDescendant(State*, State*);

    std::set<State*>  getAncestors(std::list<State*>& states);
    std::list<State*> getAncestorsList(std::set<State*>& states);
    std::set<State*>  getAncestors(State*);
    std::list<State*> getAncestorsList(State*);
    std::list<State*> getProperAncestors(State*, State*);

    State*            findLeastCommonAncestor(State*, State*);
    bool              eventMatch(const Event&, const Event&);

    std::list<State*> getAtomicStates(std::set<State*>& states);
    std::list<State*> getAtomicStates(std::list<State*>& states);

    bool              isPreempted(State*, std::list<Transition*>& transitions);

 private:
    Helper(const Helper&);             
    Helper& operator= (const Helper&); 
};

}  // namespace scxml4cpp

#endif  // SCXML4CPP_HELPER_H