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RandomEngineStateProducer.cc

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// $Id: RandomEngineStateProducer.cc,v 1.2 2006/10/23 15:27:41 wdd Exp $

#include "IOMC/RandomEngine/src/RandomEngineStateProducer.h"

#include <vector>
#include <string>
#include "boost/cstdint.hpp"

#include "FWCore/Framework/interface/Event.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "SimDataFormats/RandomEngine/interface/RandomEngineState.h"

#include "FWCore/ServiceRegistry/interface/Service.h"
#include "FWCore/Utilities/interface/RandomNumberGenerator.h"


RandomEngineStateProducer::RandomEngineStateProducer(const edm::ParameterSet& iConfig)
{
  //register your products
  produces<std::vector<RandomEngineState> >();
}


RandomEngineStateProducer::~RandomEngineStateProducer()
{
}


void
RandomEngineStateProducer::produce(edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  std::auto_ptr<std::vector<RandomEngineState> > stateVector(new std::vector<RandomEngineState>);

  edm::Service<edm::RandomNumberGenerator> randomService;
  if (randomService.isAvailable()) {

    const std::vector<std::string>& strings = randomService->getCachedLabels();
    const std::vector<std::vector<uint32_t> >& states = randomService->getCachedStates();
    const std::vector<std::vector<uint32_t> >& seeds = randomService->getCachedSeeds();

    std::vector<std::string>::const_iterator iString = strings.begin();
    std::vector<std::vector<uint32_t> >::const_iterator iState = states.begin();
    std::vector<std::vector<uint32_t> >::const_iterator iSeed = seeds.begin();

    for ( ; iString != strings.end(); ++iString, ++iState, ++iSeed) {

      RandomEngineState engineState;
      engineState.setLabel(*iString);
      engineState.setState(*iState);
      engineState.setSeed(*iSeed);
      stateVector->push_back(engineState);
    }

    iEvent.put(stateVector);
  }
}


void 
RandomEngineStateProducer::beginJob(const edm::EventSetup&)
{
}


void 
RandomEngineStateProducer::endJob()
{
}

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