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

/* $Id$ */

//-------------------------------------------------------------------------
//                      Class AliRsnEvent
//  Simple collection of reconstructed tracks, selected from an ESD event
// 
// author: A. Pulvirenti             (email: alberto.pulvirenti@ct.infn.it)
//-------------------------------------------------------------------------

#ifndef ALIRSNEVENT_H
#define ALIRSNEVENT_H

#include <TClonesArray.h>

#include "AliPID.h"

class AliRsnDaughter;

class AliRsnEvent : public TObject
{
public:
	
	AliRsnEvent();
	AliRsnEvent(const AliRsnEvent& copy);
	AliRsnEvent& operator=(const AliRsnEvent& copy);
	
	virtual       ~AliRsnEvent() {Clear("DELETE");}
	
	void           AddTrack(AliRsnDaughter track);
	void           Clear(Option_t *option = "");
	void           ComputeMultiplicity();
	Int_t          GetMultiplicity() const {return fMultiplicity;}
	Double_t       GetPrimaryVertexX() const {return fPVx;}
	Double_t       GetPrimaryVertexY() const {return fPVy;}
	Double_t       GetPrimaryVertexZ() const {return fPVz;}
	void           GetPrimaryVertex(Double_t &x, Double_t &y, Double_t &z) const {x=fPVx;y=fPVy;z=fPVz;}
	TClonesArray*  GetTracks(Char_t sign, AliPID::EParticleType type);
	void           Init();
	Int_t          PDG2Enum(Int_t pdgcode);
	void           PrintTracks();
	void           SetPrimaryVertex(Double_t x, Double_t y, Double_t z) {fPVx=x;fPVy=y;fPVz=z;}

private:

	Double_t       fPVx;                      // position of
	Double_t       fPVy;                      // primary
	Double_t       fPVz;                      // vertex
	
	Int_t          fMultiplicity;             // global event multiplicity

	TClonesArray  *fPos[AliPID::kSPECIES];    // collections of positive particles
	TClonesArray  *fNeg[AliPID::kSPECIES];    // collections of negative particles
	TClonesArray  *fPosNoPID;                 // collection of unidentified positive particles
	TClonesArray  *fNegNoPID;                 // collection of unidentified positive particles
	
	ClassDef(AliRsnEvent,1);
};

#endif