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PFTauDiscriminantManager.h

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#ifndef RecoTauTag_TauTagTools_PFTauDiscriminantManager_h
#define RecoTauTag_TauTagTools_PFTauDiscriminantManager_h

#include "PhysicsTools/MVAComputer/interface/Variable.h"
#include "DataFormats/TauReco/interface/PFTauDecayMode.h"
#include "FWCore/Framework/interface/Event.h"
#include "RecoTauTag/TauTagTools/interface/PFTauDiscriminantBase.h"
#include "RecoTauTag/TauTagTools/interface/TauTagTools.h"
#include "TTree.h"

using namespace std;

namespace PFTauDiscriminants
{

class Discriminant;

class PFTauDiscriminantManager {
   public:
      PFTauDiscriminantManager();
      ~PFTauDiscriminantManager();

      typedef vector<const reco::Candidate*> candPtrVector;
      //maps string (discriminant name, ( (discriminantComputer), links)
      typedef map<string, Discriminant* const> discriminantHolder;
      void addDiscriminant(Discriminant* const aDiscriminant);
      bool branchTree(TTree* const treeToBranch);
      void buildMVAComputerLink(std::vector<PhysicsTools::Variable::Value>&);
      bool setEventData(const reco::PFTauDecayMode& theTau, const edm::Event& iEvent, 
                        const double& eventWeight = 1., bool prePass = false, bool preFail = false);
      bool setNullResult(const edm::Event& iEvent, const double& eventWeight = 1.);
      void setSignalFlag(bool isSignal) { iAmSignal_ = isSignal; };

      //TODO: Discriminant should be a friend and these should be private...

      const reco::PFTauDecayMode* getDecayMode() const { return currentTauDecayMode_; };
      const edm::Event*           getEvent()     const { return eventData_; };

      const reco::Candidate*      mainTrack();
      const vector<const reco::Candidate*>& signalObjectsSortedByPt();
      const vector<const reco::Candidate*>& signalObjectsSortedByDR();
      const vector<const reco::Candidate*>& outlierObjectsSortedByPt();
      const vector<const reco::Candidate*>& outlierObjectsSortedByDR();

      candPtrVector                         filterByCharge(const candPtrVector& input, bool isCharged) const;

   protected:

   private:
      // magic variables
      Bool_t                                                    iAmSignal_;
      Bool_t                                                    iAmNull_;
      Bool_t                                                    prePass_;
      Bool_t                                                    preFail_;

      Double_t                                                  eventWeight_;
      discriminantHolder                                        myDiscriminants_;
      const reco::PFTauDecayMode*                               currentTauDecayMode_;
      const edm::Event*                                         eventData_;

      void                                                      clearCache();
      //cached objects 
      const reco::Candidate*                                    mainTrack_;
      candPtrVector                                             signalObjectsSortedByPt_;
      candPtrVector                                             signalObjectsSortedByDR_;
      candPtrVector                                             outlierObjectsSortedByPt_;
      candPtrVector                                             outlierObjectsSortedByDR_;

      //utility functions for filling caches
      void                                                      fillSignalObjects(candPtrVector& input);                                     
      void                                                      fillOutlierObjects(candPtrVector& input);                                     
      void                                                      computeMainTrack();

};

}
#endif

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