////////////////////////////////////////////////////////////////////////
// Helper class used by root io classes to keep track of meta information
// across runs, later written to the DS::Meta object in the CompletePass
// method
//
// Author: Jack Dunger <jack.dunger@physics.ox.ac.uk> - contact person
//
// REVISION HISTORY:
//   2017-04-12 : J. Dunger - First commit
////////////////////////////////////////////////////////////////////////

#ifndef __RAT_MetaHelper__
#define __RAT_MetaHelper__

namespace RAT{
    namespace DS{
        class Run;
        class Meta;
    }

class MetaHelper{
public:
    MetaHelper() : fContainsMC(false), fContainsData(false), fNgenerated(0),
                   fNstored(0) {}
    void AddRun(const RAT::DS::Run& run);
    void SetStoredEvents(int);
    // loads the most recent pass in meta
    void LoadLastPass(const RAT::DS::Meta& meta);

    bool GetContainsMC() const;
    bool GetContainsData() const;
    int  GetEventsGenerated() const;
    int  GetEventsStored() const;

private:
    // these two are not mutually exclusive
    bool fContainsMC;
    bool fContainsData;

    int  fNgenerated; // number requested
    int  fNstored; // number that actually made it into the tree
    };
}
#endif