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/*!
* \file codec_stack_builder.hh
* \brief Header file for ITS protocol stack builder.
* \author ETSI STF525
* \copyright ETSI Copyright Notification
* No part may be reproduced except as authorized by written permission.
* The copyright and the foregoing restriction extend to reproduction in all media.
* All rights reserved.
* \version 0.1
*/
#pragma once
#include "codec_factory.hh"
class Record_Type; //! TITAN forward declaration
/*!
* \class codec_stack_builder
* \brief This class provides a factory class to create Codec class instances
*/
class codec_stack_builder {
private: //! \privatesection
static codec_stack_builder* _instance; //! Smart pointer to the unique instance of the logger framework
std::map<std::string, codec_factory*> _codecs; //! The list of the registered \see t_codec factories
/*!
* \brief Default constructor
* Create a new instance of the codec_stack_builder class
* \private
*/
codec_stack_builder() { }; // can not be created manually
public: //! \publicsection
/*!
* \fn codec_stack_builder* get_instance();
* \brief Accessor for the unique instance of the logger framework
* \static
*/
static codec_stack_builder* get_instance() { return _instance ? _instance : _instance = new codec_stack_builder(); };
/*!
* \fn void register_codec_factory(const std::string & p_type, codec_factory<TPDUEnc, TPDUDec>* p_codec_factory);
* \brief Add a new codec factory
* \param[in] p_type The codec identifier (e.g. GN for the GeoNetworking codec...)
* \param[in] p_codec_factory A reference to the \see codec_factory
* \static
*/
static void register_codec_factory(const std::string & p_type, codec_factory* p_codec_factory) { codec_stack_builder::get_instance()->_register_codec_factory(p_type, p_codec_factory); };
private: //! \privatesection
/*!
* \fn void _register_codec_factory(const std::string & p_type, codec_factory<TPDUEnc, TPDUDec>* p_codec_factory);
* \brief Add a new codec factory
* \param[in] p_type The codec identifier (e.g. GN for the GeoNetworking codec...)
* \param[in] p_codec_factory A reference to the \see codec_factory
*/
void _register_codec_factory(const std::string & p_type, codec_factory* p_codec_factory) { _codecs[p_type] = p_codec_factory; };
public: //! \publicsection
/*!
* \fn codec* get_codec(const char* p_codec_name);
* \brief Retrieve the specified codec name from the list of the registered codecs
* \param[in] p_codec_name The codec indentifier
* \return The pointer to the codec object on success, nullptr otherwise
*/
inline codec<Record_Type, Record_Type>* get_codec(const char* p_codec_name) { // NOTE A virtual method cannot not be a template ==> polymorphism required here
typename std::map<std::string, codec_factory*>::const_iterator it = _codecs.find(p_codec_name);
if (it != _codecs.cend()) {
return it->second->create_codec();
}
return nullptr;
}
}; // End of class codec_stack_builder