/data/refman/pasoursint/CMSSW_5_3_3/src/FWCore/PluginManager/src/PresenceFactory.cc

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#include "FWCore/PluginManager/interface/PresenceFactory.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "FWCore/Utilities/interface/DebugMacros.h"

#include <iostream>

EDM_REGISTER_PLUGINFACTORY(edm::PresencePluginFactory,"CMS EDM Framework Presence");

namespace edm {
  
  PresenceFactory::~PresenceFactory() {
  }

  PresenceFactory::PresenceFactory() {
  }


  PresenceFactory* PresenceFactory::get() {
    static PresenceFactory singleInstance_;
    return &singleInstance_;
  }

  std::auto_ptr<Presence>
  PresenceFactory::
  makePresence(std::string const & presence_type) const {
    std::auto_ptr<Presence> sp(PresencePluginFactory::get()->create(presence_type));

    if(sp.get()==0) {
        throw edm::Exception(errors::Configuration, "NoPresenceModule")
          << "Presence Factory:\n"
          << "Cannot find presence type: "
          << presence_type << "\n"
          << "Perhaps the name is misspelled or is not a Plugin?\n"
          << "Try running EdmPluginDump to obtain a list of available Plugins.";
    }

    FDEBUG(1) << "PresenceFactory: created presence "
              << presence_type
              << std::endl;

    return sp;
  }
}