platform/src/Codec.cpp

// ------------------------------------------------------------------------
// Pion is a development platform for building Reactors that process Events
// ------------------------------------------------------------------------
// Copyright (C) 2007-2008 Atomic Labs, Inc.  (http://www.atomiclabs.com)
//
// Pion is free software: you can redistribute it and/or modify it under the
// terms of the GNU Affero General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// Pion 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 Affero General Public License for
// more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with Pion.  If not, see <http://www.gnu.org/licenses/>.
//

#include <pion/platform/Codec.hpp>
#include <pion/platform/ConfigManager.hpp>


namespace pion {        // begin namespace pion
namespace platform {    // begin namespace platform (Pion Platform Library)


// static members of Codec
const std::string           Codec::EVENT_ELEMENT_NAME = "EventType";
    
        
// Codec member functions

void Codec::setConfig(const Vocabulary& v, const xmlNodePtr config_ptr)
{
    PlatformPlugin::setConfig(v, config_ptr);
    
    // determine the type of event used by the codec
    std::string codec_event_str;
    if (! ConfigManager::getConfigOption(EVENT_ELEMENT_NAME, codec_event_str,
                                         config_ptr))
        throw EmptyEventException(getId());

    // find the Term reference number for the event type
    Vocabulary::TermRef event_type = v.findTerm(codec_event_str);
    if (event_type == Vocabulary::UNDEFINED_TERM_REF)
        throw UnknownTermException(codec_event_str);
    m_event_term = v[event_type];

    // make sure that it is an object type Term
    if (m_event_term.term_type != Vocabulary::TYPE_OBJECT)
        throw NotAnObjectException(codec_event_str);
}
    
void Codec::updateVocabulary(const Vocabulary& v)
{
    PlatformPlugin::updateVocabulary(v);

    // assume that term references never change
}

}   // end namespace platform
}   // end namespace pion

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