LHEReader.h

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#ifndef GeneratorInterface_LHEInterface_LHEReader_h
#define GeneratorInterface_LHEInterface_LHEReader_h

#include <string>
#include <vector>
#include <memory>

#include <boost/shared_ptr.hpp>

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

namespace lhef {

class XMLDocument;
class LHERunInfo;
class LHEEvent;

class LHEReader {
    public:
    LHEReader(const edm::ParameterSet &params);
    LHEReader(const std::vector<std::string> &fileNames,
              unsigned int skip = 0);
    LHEReader(const std::string & inputs,
              unsigned int skip = 0);
    ~LHEReader();

    boost::shared_ptr<LHEEvent> next(bool* newFileOpened = nullptr);

    private:
    class Source;
    class FileSource;
    class StringSource;
    class XMLHandler;

    const std::vector<std::string>  fileURLs;
    const std::string               strName;
    unsigned int            firstEvent;
    int             maxEvents;
    unsigned int            curIndex;
    std::vector<std::string>        weightsinconfig;

    std::unique_ptr<Source>     curSource;
    std::unique_ptr<XMLDocument>    curDoc;
    boost::shared_ptr<LHERunInfo>   curRunInfo;
    std::unique_ptr<XMLHandler> handler;
};

} // namespace lhef

#endif // GeneratorInterface_LHEInterface_LHEReader_h