LHESource.h

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#ifndef GeneratorInterface_LHEInterface_LHESource_h
#define GeneratorInterface_LHEInterface_LHESource_h

#include <memory>

#include <boost/shared_ptr.hpp>
#include <boost/ptr_container/ptr_deque.hpp>

#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/Run.h"
#include "FWCore/Sources/interface/ExternalInputSource.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "SimDataFormats/GeneratorProducts/interface/LesHouches.h"

namespace lhef {
    class LHERunInfo;
    class LHEEvent;
    class LHEReader;
}

class LHERunInfoProduct;

class LHESource : public edm::ExternalInputSource {
    public:
    explicit LHESource(const edm::ParameterSet &params,
                       const edm::InputSourceDescription &desc);
    virtual ~LHESource();

    protected:
    virtual void endJob();
    virtual void beginRun(edm::Run &run);
    virtual void endRun(edm::Run &run);
    virtual bool produce(edm::Event &event);

    virtual void nextEvent();

    std::auto_ptr<lhef::LHEReader>      reader;

    boost::shared_ptr<lhef::LHERunInfo> runInfoLast;
    boost::shared_ptr<lhef::LHERunInfo> runInfo;
    boost::shared_ptr<lhef::LHEEvent>   partonLevel;

    boost::ptr_deque<LHERunInfoProduct> runInfoProducts;
    bool                    wasMerged;
};

#endif // GeneratorInterface_LHEInterface_LHESource_h