/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               *
 **************************************************************************/

/* $Id$ */

//
// *** Class AliRsnEvent ***
//
// A container for a collection of AliRsnDaughter objects from an event.
// Contains also the primary vertex, useful for some cuts.
// In order to retrieve easily the tracks which have been identified
// as a specific type and charge, there is an array of indexes which
// allows to avoid to loop on all tracks and have only the neede ones.
//
// authors: A. Pulvirenti (email: alberto.pulvirenti@ct.infn.it)
//          M. Vala (email: martin.vala@cern.ch)
//

#ifndef ALIRSNEVENT_H
#define ALIRSNEVENT_H

#include "AliRsnDaughter.h"

class AliVEvent;
class AliMCEvent;

class AliRsnEvent : public TObject
{
  public:

    AliRsnEvent(AliVEvent *ref = 0, AliMCEvent *refMC = 0);
    AliRsnEvent(const AliRsnEvent& copy);
    AliRsnEvent& operator= (const AliRsnEvent& copy);
    virtual ~AliRsnEvent();

    void SetRef(AliVEvent *event, AliMCEvent *mc = 0) {fRef = event; fRefMC = mc;}
    void SetRefMC(AliMCEvent *mc) {fRefMC = mc;}

    void            SetDaughter(AliRsnDaughter &daughter, Int_t index);
    AliRsnDaughter  GetDaughter(Int_t i);
    Int_t           GetMultiplicity();
    Double_t        GetVz();
    AliRsnDaughter  GetLeadingParticle(Double_t ptMin = 0.0, AliPID::EParticleType type = AliPID::kUnknown);
    Double_t        GetAverageMomentum(Int_t &count, AliPID::EParticleType type = AliPID::kUnknown);
    Bool_t          GetAngleDistr(Double_t &angleMean, Double_t &angleRMS, AliRsnDaughter d);

  private:

    Bool_t AcceptTrackPID(AliRsnDaughter *d, AliPID::EParticleType type = AliPID::kUnknown);

    AliVEvent  *fRef;   // pointer to input event (if it is an AOD, this is NULL)
    AliMCEvent *fRefMC; // pointer to reference MC event (if any)

    ClassDef(AliRsnEvent, 3);
};

#endif