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/**
* @file
* @author 2016 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
* @copyright Simplified BSD
*
* @cond
* This program is free software: you can redistribute it and/or modify
* it under the terms of the FreeBSD license as published by the FreeBSD
* project.
*
* This program 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.
*
* You should have received a copy of the FreeBSD license along with this
* program. If not, see <http://www.opensource.org/licenses/bsd-license>.
* @endcond
*/
#ifndef MICROSTEPIMPL_H_98233709
#define MICROSTEPIMPL_H_98233709
#include <memory>
#include <mutex>
#include <list>
#include <map>
#include <string>
#include "uscxml/Common.h"
#include "uscxml/messages/Event.h"
#include "uscxml/interpreter/InterpreterMonitor.h"
#include "uscxml/util/DOM.h"
#include <xercesc/dom/DOM.hpp>
namespace uscxml {
enum InterpreterState {
USCXML_FINISHED = -2, ///< machine reached a final configuration and is done
USCXML_INTERRUPTED = -1, ///< machine received the empty event on the external queue
USCXML_UNDEF = 0, ///< not an actual state
USCXML_IDLE = 1, ///< stable configuration and queues empty
USCXML_INITIALIZED = 2, ///< DOM is setup and all external components instantiated
USCXML_INSTANTIATED = 3, ///< nothing really, just instantiated
USCXML_MICROSTEPPED = 4, ///< processed one transition set
USCXML_MACROSTEPPED = 5, ///< processed all transition sets and reached a stable configuration
USCXML_CANCELLED = 6, ///< machine was cancelled, step once more to finalize
};
class USCXML_API MicroStepCallbacks {
public:
/** Event Queues / Matching */
virtual Event dequeueInternal() = 0;
virtual Event dequeueExternal(bool blocking) = 0;
virtual bool isMatched(const Event& event, const std::string& eventDesc) = 0;
virtual void raiseDoneEvent(xercesc::DOMElement* state, xercesc::DOMElement* doneData) = 0;
/** Datamodel */
virtual bool isTrue(const std::string& expr) = 0;
virtual void initData(xercesc::DOMElement* element) = 0;
/** Executable Content */
virtual void process(xercesc::DOMElement* block) = 0;
/** Invocations */
virtual void invoke(xercesc::DOMElement* invoke) = 0;
virtual void uninvoke(xercesc::DOMElement* invoke) = 0;
/** Monitoring */
virtual InterpreterMonitor* getMonitor() = 0;
};
class USCXML_API MicroStepImpl {
public:
enum Binding {
EARLY = 0,
LATE = 1
};
MicroStepImpl(MicroStepCallbacks* callbacks) : _callbacks(callbacks) {}
virtual InterpreterState step(bool blocking) = 0;
virtual void reset() = 0; ///< Reset state machine
virtual bool isInState(const std::string& stateId) = 0;
virtual std::list<xercesc::DOMElement*> getConfiguration() = 0;
virtual void init(xercesc::DOMElement* scxml) = 0;
virtual void markAsCancelled() = 0;
protected:
MicroStepCallbacks* _callbacks;
};
class USCXML_API MicroStep {
public:
PIMPL_OPERATORS(MicroStep)
virtual InterpreterState step(bool blocking) {
return _impl->step(blocking);
}
virtual void reset() {
return _impl->reset();
}
virtual bool isInState(const std::string& stateId) {
return _impl->isInState(stateId);
}
std::list<xercesc::DOMElement*> getConfiguration() {
return _impl->getConfiguration();
}
virtual void init(xercesc::DOMElement* scxml) {
_impl->init(scxml);
}
virtual void markAsCancelled() {
_impl->markAsCancelled();
}
protected:
std::shared_ptr<MicroStepImpl> _impl;
};
}
#endif /* end of include guard: MICROSTEPIMPL_H_98233709 */
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