FullHistoryToReducedHistoryMap.h

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#ifndef DataFormats_Provenance_FullHistoryToReducedHistoryMap_h
#define DataFormats_Provenance_FullHistoryToReducedHistoryMap_h

#include "DataFormats/Provenance/interface/ProcessHistoryID.h"

#include <map>

namespace edm {

  class FullHistoryToReducedHistoryMap {
  public:

    FullHistoryToReducedHistoryMap();

    ProcessHistoryID const& reduceProcessHistoryID(ProcessHistoryID const& fullID);

  private:
    FullHistoryToReducedHistoryMap(FullHistoryToReducedHistoryMap const&);
    FullHistoryToReducedHistoryMap& operator=(FullHistoryToReducedHistoryMap const&);

    typedef std::map<ProcessHistoryID, ProcessHistoryID> Map;
    Map cache_;
    Map::const_iterator previous_;
  };
}
#endif