statistic_node.h

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#pragma once
#ifndef SYDEVS_SYSTEMS_STATISTIC_NODE_H_
#define SYDEVS_SYSTEMS_STATISTIC_NODE_H_

#include <sydevs/systems/function_node.h>

namespace sydevs {
namespace systems {


template<typename T>
class statistic_node : public function_node
{
public:
    statistic_node(const std::string& node_name, const node_context& external_context);

    port<flow, input, T> statistic;  

    const T& value() const;  

private:
    pointer val_;

    virtual void flow_event();
};


template<typename T>
inline statistic_node<T>::statistic_node(const std::string& node_name, const node_context& external_context)
    : function_node(node_name, external_context)
    , statistic("statistic", external_interface())
    , val_()
{
}


template<typename T>
inline const T& statistic_node<T>::value() const
{
    return val_.dereference<T>();
}


template<typename T>
inline void statistic_node<T>::flow_event()
{
    val_ = qualified_type<T>::copy(statistic.value());
}


}  // namespace
}  // namespace

#endif