/***************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/*
 $Id$
*/

////////////////////////////////////////////////////////////////////////
// This class defines the "Standard" reconstruction for the ITS       // 
// detector.                                                          //
//                                                                    //
////////////////////////////////////////////////////////////////////////
#include "TObjArray.h"
#include "TTree.h"

#include "AliITSClusterFinder.h"
#include "AliITSClusterFinderV2.h"
#include "AliITSClusterFinderV2SPD.h"
#include "AliITSClusterFinderV2SDD.h"
#include "AliITSClusterFinderV2SSD.h"
#include "AliITSClusterFinderSPD.h"
#include "AliITSClusterFinderSDD.h"
#include "AliITSClusterFinderSSD.h"
#include "AliITSclusterV2.h"
#include "AliITSgeom.h"
#include "AliITSDetTypeRec.h"
#include "AliITSRawCluster.h"
#include "AliITSRawClusterSPD.h"
#include "AliITSRawClusterSDD.h"
#include "AliITSRawClusterSSD.h"
#include "AliITSRecPoint.h"
#include "AliITSresponseSPD.h"
#include "AliITSresponseSDD.h"
#include "AliITSresponseSSD.h"
#include "AliITSsegmentationSPD.h"
#include "AliITSsegmentationSDD.h"
#include "AliITSsegmentationSSD.h"


const Int_t AliITSDetTypeRec::fgkNdettypes = 3;
ClassImp(AliITSDetTypeRec)

//________________________________________________________________
AliITSDetTypeRec::AliITSDetTypeRec(): TObject(),
fGeom(),        //
fReconstruction(),// [NDet]
fSegmentation(),  // [NDet]
fCalibration(),   // [NMod]
fPreProcess(),    // [] e.g. Find Calibration values
fPostProcess(),   // [] e.g. find primary vertex
fDigits(),        //! [NMod][NDigits]
fClusterClassName(), // String with Cluster class name
fDigClassName(),     // String with digit class name.
fRecPointClassName(){// String with RecPoint class name
    // Default Constructor
    // Inputs:
    //    none.
    // Outputs:
    //    none.
    // Return:
    //    A properly zero-ed AliITSDetTypeRec class.

  fGeom = 0;
  fReconstruction = new TObjArray(fgkNdettypes);
  fSegmentation = 0;
  fCalibration = 0;
  fPreProcess = 0;
  fPostProcess = 0;
  fDigits = new TObjArray(fgkNdettypes);
  fNdtype = new Int_t[fgkNdettypes];
  fCtype = new TObjArray(fgkNdettypes);
  fNctype = new Int_t[fgkNdettypes];
  fRecPoints = new TClonesArray("AliITSRecPoint",1000);
  fNRecPoints = 0;
  fClustersV2 = new TClonesArray("AliITSclusterV2",3000);
  fNClustersV2 = 0;
  
  for(Int_t i=0;i<fgkNdettypes;i++){
    fNdtype[i]=0;
    fNctype[i]=0;
  }
  
  SelectVertexer(" ");
  fLoader = 0;
}
//______________________________________________________________________
AliITSDetTypeRec::AliITSDetTypeRec(const AliITSDetTypeRec &/*rec*/):TObject(/*rec*/){
    // Copy constructor. 

  Error("Copy constructor","Copy constructor not allowed");
  
}
//______________________________________________________________________
AliITSDetTypeRec& AliITSDetTypeRec::operator=(const AliITSDetTypeRec& /*source*/){
    // Assignment operator. This is a function which is not allowed to be
    // done.
    Error("operator=","Assignment operator not allowed\n");
    return *this; 
}

//_____________________________________________________________________
AliITSDetTypeRec::~AliITSDetTypeRec(){
 
  //Destructor
  if(fGeom) delete fGeom;
  if(fReconstruction) delete fReconstruction;
  if(fSegmentation) delete fSegmentation;
  if(fCalibration) delete fCalibration;
  if(fPreProcess) delete fPreProcess;
  if(fPostProcess) delete fPostProcess;

  if(fDigits){
    fDigits->Delete();
    delete fDigits;
    fDigits=0;
  }
  if(fRecPoints){
    fRecPoints->Delete();
    delete fRecPoints;
    fRecPoints=0;
  }
  if(fClustersV2){
    fClustersV2->Delete();
    delete fClustersV2;
    fClustersV2=0;
  }
  if(fCtype) {
    fCtype->Delete();
    delete fCtype;
    fCtype = 0;
  }
  delete [] fNctype;
  if(fLoader) delete fLoader;
  
}
//___________________________________________________________________
void AliITSDetTypeRec::SetReconstructionModel(Int_t dettype,AliITSClusterFinder *clf){

  //Set reconstruction model for detector type

  if(fReconstruction==0) fReconstruction = new TObjArray(fgkNdettypes);
  if(fReconstruction->At(dettype)!=0) delete fReconstruction->At(dettype);
  fReconstruction->AddAt(clf,dettype);
}
//______________________________________________________________________
AliITSClusterFinder* AliITSDetTypeRec::GetReconstructionModel(Int_t dettype){

  //Get reconstruction model for detector type
  if(fReconstruction==0)  {
    Warning("GetReconstructionModel","fReconstruction is 0!");
    return 0;     
  }
  return (AliITSClusterFinder*)fReconstruction->At(dettype);
}

//______________________________________________________________________
void AliITSDetTypeRec::SetSegmentationModel(Int_t dettype,AliITSsegmentation *seg){
   
  //Set segmentation model for detector type
  
  if(fSegmentation==0) fSegmentation = new TObjArray(fgkNdettypes);
  if(fSegmentation->At(dettype)!=0) delete fSegmentation->At(dettype);
  fSegmentation->AddAt(seg,dettype);

}
//______________________________________________________________________
AliITSsegmentation* AliITSDetTypeRec::GetSegmentationModel(Int_t dettype){

  //Get segmentation model for detector type
   
   if(fSegmentation==0) {
     Warning("GetSegmentationModel","fSegmentation is 0!");
     return 0; 
   } 
   return (AliITSsegmentation*)fSegmentation->At(dettype);

}
//_______________________________________________________________________
void AliITSDetTypeRec::SetCalibrationModel(Int_t dettype,AliITSresponse *resp){

  
  //Set segmentation model for module number
  if(fCalibration==0) fCalibration = new TObjArray(fgkNdettypes);
  if(fCalibration->At(dettype)!=0) delete fCalibration->At(dettype);
  fCalibration->AddAt(resp,dettype);
 
}
//_______________________________________________________________________
AliITSresponse* AliITSDetTypeRec::GetCalibrationModel(Int_t dettype){
  
  //Get segmentation model for module number
  
  if(fCalibration==0) {
    Warning("GetalibrationModel","fResponse is 0!");
    return 0; 
  }  
  return (AliITSresponse*)fCalibration->At(dettype);
}

//______________________________________________________________________
void AliITSDetTypeRec::SetTreeAddress(){
    // Set branch address for the Trees.
 
  TTree *treeR = fLoader->TreeR();
  TTree *treeD = fLoader->TreeD();
 
  SetTreeAddressD(treeD);
  SetTreeAddressR(treeR);
}
//______________________________________________________________________
void AliITSDetTypeRec::SetTreeAddressD(TTree *treeD){
    // Set branch address for the tree of digits.

    const char *det[4] = {"SPD","SDD","SSD","ITS"};
    TBranch *branch;
    Char_t* digclass;
    Int_t i;
    char branchname[30];

    if(!treeD) return;
    if (fDigits == 0x0) fDigits = new TObjArray(fgkNdettypes);
    for (i=0; i<fgkNdettypes; i++) {
        digclass = GetDigitClassName(i);
	if(!(fDigits->At(i))) {
            fDigits->AddAt(new TClonesArray(digclass,1000),i);
        }else{
            ResetDigits(i);
        } 
        if (fgkNdettypes==3) sprintf(branchname,"%sDigits%s",det[3],det[i]);
        else  sprintf(branchname,"%sDigits%d",det[3],i+1);
        if (fDigits) {
            branch = treeD->GetBranch(branchname);
            if (branch) branch->SetAddress(&((*fDigits)[i]));
        } 
    } 
}

//_______________________________________________________________________
TBranch* AliITSDetTypeRec::MakeBranchInTree(TTree *tree, const char* name, 
                                       const char *classname, 
                                       void* address,Int_t size, 
                                       Int_t splitlevel, const char */*file*/)
{ 
//
// Makes branch in given tree and diverts them to a separate file
// 
//
//
    
  if (tree == 0x0) {
    Error("MakeBranchInTree","Making Branch %s Tree is NULL",name);
    return 0x0;
  }
  TBranch *branch = tree->GetBranch(name);
  if (branch) {  
    return branch;
  }
  if (classname){
    branch = tree->Branch(name,classname,address,size,splitlevel);
  }
  else {
    branch = tree->Bronch(name, "TClonesArray", address, size, splitlevel);
  }
  
  return branch;
}

//____________________________________________________________________
void AliITSDetTypeRec::SetDefaults(){
  
  //Set defaults for segmentation and response


  if(fGeom==0){
    Warning("SetDefaults","fGeom is 0!");
    return;
  }

  AliITSsegmentation* seg;
  AliITSresponse* res;

  for(Int_t dettype=0;dettype<fgkNdettypes;dettype++){
    if(dettype==0){
      seg = new AliITSsegmentationSPD(fGeom);
      SetSegmentationModel(dettype,seg);
      SetCalibrationModel(dettype,new AliITSresponseSPD());
      SetDigitClassName(dettype,"AliITSdigitSPD");
      SetClusterClassName(dettype,"AliITSRawClusterSPD");

    }
    if(dettype==1){
      res = new AliITSresponseSDD("simulated");
      seg = new AliITSsegmentationSDD(fGeom,res);
      SetSegmentationModel(dettype,seg);
      SetCalibrationModel(dettype,new AliITSresponseSDD("simulated"));
      const char *kopt = GetCalibrationModel(dettype)->ZeroSuppOption();
      if((!strstr(kopt,"2D"))&&(!strstr(kopt,"1D"))) SetDigitClassName(dettype,"AliITSdigit");
      else SetDigitClassName(dettype,"AliITSdigitSDD");
      SetClusterClassName(dettype,"AliITSRawClusterSDD");

    }
    if(dettype==2){
      AliITSsegmentationSSD* seg2 = new AliITSsegmentationSSD(fGeom);
      seg2->SetAngles(0.0075,0.0275); // strip angels rad P and N side.
      seg2->SetAnglesLay5(0.0075,0.0275); // strip angels rad P and N side.
      seg2->SetAnglesLay6(0.0275,0.0075); // strip angels rad P and N side.

      SetSegmentationModel(dettype,seg2);
      SetCalibrationModel(dettype,new AliITSresponseSSD("simulated"));
      SetDigitClassName(dettype,"AliITSdigitSSD");
      SetClusterClassName(dettype,"AliITSRawClusterSSD");

     
    }

  }
 
  
}

//________________________________________________________________
void AliITSDetTypeRec::SetDefaultClusterFinders(){
  
  //set defaults for standard cluster finder

  if(fGeom==0){
    Warning("SetDefaults","fGeom is 0!");
    return;
  }

  AliITSsegmentation* seg;
  AliITSresponse* res;
  AliITSClusterFinder *clf; 

  MakeTreeC();
 
 for(Int_t dettype=0;dettype<fgkNdettypes;dettype++){
    //SPD
    if(dettype==0){
      if(!GetReconstructionModel(dettype)){
	seg = (AliITSsegmentation*)GetSegmentationModel(dettype);
	TClonesArray *dig0 = DigitsAddress(0);
	TClonesArray *rec0 = ClustersAddress(0);
	clf = new AliITSClusterFinderSPD(seg,dig0,rec0);
	SetReconstructionModel(dettype,clf);
      }
    }
    //SDD
    if(dettype==1){
      if(!GetReconstructionModel(dettype)){
	seg = (AliITSsegmentation*)GetSegmentationModel(dettype);
        res = (AliITSresponse*)GetCalibrationModel(dettype);
	TClonesArray *dig1 = DigitsAddress(1);
	TClonesArray *rec1 = ClustersAddress(1);
	clf = new AliITSClusterFinderSDD(seg,res,dig1,rec1);
	SetReconstructionModel(dettype,clf);
      }

    }
    //SSD
    if(dettype==2){
      if(!GetReconstructionModel(dettype)){
	seg = (AliITSsegmentation*)GetSegmentationModel(dettype);
	TClonesArray* dig2 = DigitsAddress(2);
	clf = new AliITSClusterFinderSSD(seg,dig2);
	clf->SetITSgeom(fGeom);
	SetReconstructionModel(dettype,clf);
      }
    }

 }
 
  
}

//________________________________________________________________
void AliITSDetTypeRec::SetDefaultClusterFindersV2(Bool_t rawdata){

  //Set defaults for cluster finder V2

  if(fGeom==0){
    Warning("SetDefaults","fGeom is 0!");
    return;
  }

  AliITSsegmentation* seg;
  AliITSClusterFinder *clf; 

  MakeTreeC();
  for(Int_t dettype=0;dettype<fgkNdettypes;dettype++){
    //SPD
    if(dettype==0){
      if(!GetReconstructionModel(dettype)){
	seg = (AliITSsegmentation*)GetSegmentationModel(dettype);
	clf = new AliITSClusterFinderV2SPD(fGeom);
	clf->InitGeometry();
	clf->SetSegmentation(seg);
	if(!rawdata) clf->SetDigits(DigitsAddress(0));
	SetReconstructionModel(dettype,clf);

      }
    }
    //SDD
    if(dettype==1){
      if(!GetReconstructionModel(dettype)){
	seg = (AliITSsegmentation*)GetSegmentationModel(dettype);
	clf = new AliITSClusterFinderV2SDD(fGeom);
	clf->InitGeometry();	
	clf->SetSegmentation(seg);
	if(!rawdata) clf->SetDigits(DigitsAddress(1));
	SetReconstructionModel(dettype,clf);
      }

    }

    //SSD
    if(dettype==2){
      if(!GetReconstructionModel(dettype)){
	seg = (AliITSsegmentation*)GetSegmentationModel(dettype);
	clf = new AliITSClusterFinderV2SSD(fGeom);
	clf->InitGeometry();
	clf->SetSegmentation(seg);
	if(!rawdata) clf->SetDigits(DigitsAddress(2));
	SetReconstructionModel(dettype,clf);
      }
    }

 }
   
}
//______________________________________________________________________
void AliITSDetTypeRec::MakeBranch(Option_t* option){

  //Creates branches for clusters and recpoints
  Bool_t cR = (strstr(option,"R")!=0);
  Bool_t cRF = (strstr(option,"RF")!=0);
  Bool_t v2 = (strstr(option,"v2")!=0);
  
  if(cRF)cR = kFALSE;

  if(cR) MakeBranchR(0);
  if(cRF) MakeBranchRF(0);
  if(v2) MakeBranchR(0,"v2");

}

//_____________________________________________________________
void AliITSDetTypeRec::MakeTreeC(){
  
  //Create a separate tree to store the clusters
  if(!fLoader){
    Warning("MakeTreeC","ITS loader is null!");
    return;
  }
  if(fLoader->TreeC()== 0x0) fLoader->MakeTree("C");
  MakeBranchC();
}

//______________________________________________________________
void AliITSDetTypeRec::MakeBranchC(){
  
  //Make branches in the tree of clusters

  if(!fLoader){
    Warning("MakeBranchC","ITS loader is null!");
    return;
  }
  TTree* lTC = fLoader->TreeC();
  if(lTC==0x0){
    Error("MakeTreeC","Can not get TreeC from loader");
    return;
  }
  
  Int_t buffersize = 4000;
  Char_t branchname[30];
  Char_t* cluclass;
  const char *det[4]={"SPD","SDD","SSD","ITS"};

  for(Int_t i=0;i<fgkNdettypes;i++){
    cluclass = GetClusterClassName(i);
    if(fCtype==0x0)  fCtype = new TObjArray(fgkNdettypes);
    if(!ClustersAddress(i)){
      fCtype->AddAt(new TClonesArray(cluclass,1000),i);
    }
    if(fgkNdettypes==3) sprintf(branchname,"%sClusters%s",det[3],det[i]);
    else sprintf(branchname,"%sClusters%d",det[3],i+1);
    if(fCtype && lTC){
      if(lTC->GetBranch(branchname)){
	Warning("MakeBranchC","Branch %s already exists in TreeC",branchname);
      } else{
	Info("MakeBranchC","Creating branch %s in TreeC",branchname);
	lTC->Branch(branchname,&((*fCtype)[i]),buffersize);
      }
    }

  }
  
}

//_______________________________________________________________
void AliITSDetTypeRec::GetTreeC(Int_t event){
  
  //Get the clusters tree for this event and
  //sets the branch address


  if(!fLoader){
    Warning("GetTreeC","ITS loader is null!");
    return;
  }
  
  Char_t branchname[30];
  const char *det[4] = {"SPD","SDD","SSD","ITS"};
  TTree* lTC = fLoader->TreeC();
  
  ResetClusters();
  if(lTC) fLoader->CleanRawClusters();

  TBranch* branch;
  if(lTC){
    Char_t* cluclass;
    for(Int_t i=0;i<fgkNdettypes;i++){
      cluclass = GetClusterClassName(i);
      if(fCtype==0x0) fCtype = new TObjArray(fgkNdettypes);
      if(!fCtype->At(i)) fCtype->AddAt(new TClonesArray(cluclass,1000),i);
      if(fgkNdettypes==3) sprintf(branchname,"%sClusters%s",det[3],det[i]);
      else sprintf(branchname,"%sClusters%d",det[3],i+1);
      if(fCtype){
	branch = lTC->GetBranch(branchname);
	if(branch) branch->SetAddress(&((*fCtype)[i]));
      }
    }
  } else{
    Error("GetTreeC","cannot find clusters Tree for vent %d",event);
  }

}

//___________________________________________________________________
void AliITSDetTypeRec::AddCluster(Int_t id, AliITSRawCluster *c){

  // Adds a raw cluster to the list
  TClonesArray &lc = *((TClonesArray*)fCtype->At(id));  
  switch(id){
  case 0:
    new(lc[fNctype[id]++]) AliITSRawClusterSPD(*((AliITSRawClusterSPD*)c));
    break;
  case 1:
    new(lc[fNctype[id]++]) AliITSRawClusterSDD(*((AliITSRawClusterSDD*)c));
    break;
  case 2:
    new(lc[fNctype[id]++]) AliITSRawClusterSSD(*((AliITSRawClusterSSD*)c));
    break;
  } 
}
//___________________________________________________________________
void AliITSDetTypeRec::ResetDigits(){
  // Reset number of digits and the digits array for the ITS detector.
  
  if(!fDigits) return;
  for(Int_t i=0;i<fgkNdettypes;i++){
    ResetDigits(i);
  }
}
//___________________________________________________________________
void AliITSDetTypeRec::ResetDigits(Int_t branch){
  // Reset number of digits and the digits array for this branch.
  
  if(fDigits->At(branch)) ((TClonesArray*)fDigits->At(branch))->Clear();
  if(fNdtype) fNdtype[branch]=0;

}

//__________________________________________________________________
void AliITSDetTypeRec::ResetClusters(){

  //Resets number of clusters and the cluster array 
  for(Int_t i=0;i<fgkNdettypes;i++){
    ResetClusters(i);
  }
}

//__________________________________________________________________
void AliITSDetTypeRec::ResetClusters(Int_t i){

  //Resets number of clusters and the cluster array for this branch

  if (fCtype->At(i))    ((TClonesArray*)fCtype->At(i))->Clear();
  if (fNctype)  fNctype[i]=0;
}
//__________________________________________________________________
void AliITSDetTypeRec::MakeBranchR(const char *file, Option_t *opt){

  //Creates tree branches for recpoints
  // Inputs:
  //      cont char *file  File name where RecPoints branch is to be written
  //                       to. If blank it write the SDigits to the same
  //                       file in which the Hits were found.

  if(!fLoader){
    Warning("MakeBranchR","ITS loader is null!");
    return;
  }

  Int_t buffsz = 4000;
  char branchname[30];

  // only one branch for rec points for all detector types
  Bool_t oFast= (strstr(opt,"Fast")!=0);
  Bool_t v2 = (strstr(opt,"v2")!=0);
  
  Char_t detname[10] = "ITS";
 
  
  if(oFast){
    sprintf(branchname,"%sRecPointsF",detname);
  } else if(v2){
    sprintf(branchname,"Clusters");
  } else {
    sprintf(branchname,"%sRecPoints",detname);
  }
  
  if(v2){
    
    if(!fClustersV2)fClustersV2 = new TClonesArray("AliITSclusterV2",3000);
    if(fLoader->TreeR()){
      if(fClustersV2==0x0) fClustersV2 = new TClonesArray("AliITSclusterV2",3000);
      MakeBranchInTree(fLoader->TreeR(),branchname,0,&fClustersV2,buffsz,99,file);
      
    }
  }else{
    if(!fRecPoints)fRecPoints = new TClonesArray("AliITSRecPoint",1000);
    if (fLoader->TreeR()) {
      if(fRecPoints==0x0) fRecPoints = new TClonesArray("AliITSRecPoint",
							1000);
      MakeBranchInTree(fLoader->TreeR(),branchname,0,&fRecPoints,buffsz,99,file);
    } // end if
  }
  
}
//______________________________________________________________________
void AliITSDetTypeRec::SetTreeAddressR(TTree *treeR){
    // Set branch address for the Reconstructed points Trees.
    // Inputs:
    //      TTree *treeR   Tree containing the RecPoints.
    // Outputs:
    //      none.
    // Return:

    char branchname[30];
    Char_t namedet[10]="ITS";

    if(!treeR) return;
    if(fRecPoints==0x0) fRecPoints = new TClonesArray("AliITSRecPoint",1000);
    TBranch *branch1;
    sprintf(branchname,"Clusters");
    branch1 = treeR->GetBranch(branchname);
    if(branch1){
      if(fClustersV2==0x0) fClustersV2 = new TClonesArray("AliITSclusterV2",3000);
      branch1->SetAddress(&fClustersV2);
    }
    else{
      TBranch *branch;
      sprintf(branchname,"%sRecPoints",namedet);
      branch = treeR->GetBranch(branchname);
      if (branch) {
        branch->SetAddress(&fRecPoints);
      }else {
        sprintf(branchname,"%sRecPointsF",namedet);
        branch = treeR->GetBranch(branchname);
        if (branch) {
	  branch->SetAddress(&fRecPoints);
        }
      }
    }
}
//____________________________________________________________________
void AliITSDetTypeRec::AddRecPoint(const AliITSRecPoint &r){
    // Add a reconstructed space point to the list
    // Inputs:
    //      const AliITSRecPoint &r RecPoint class to be added to the tree
    //                              of reconstructed points TreeR.
    // Outputs:
    //      none.
    // Return:
    //      none.

    TClonesArray &lrecp = *fRecPoints;
    new(lrecp[fNRecPoints++]) AliITSRecPoint(r);
}
//______________________________________________________________________
void AliITSDetTypeRec::AddClusterV2(const AliITSclusterV2 &r){
    // Add a reconstructed space point to the list
    // Inputs:
    //      const AliITSClusterV2 &r class to be added to the tree
    //                              of reconstructed points TreeR.
    // Outputs:
    //      none.
    // Return:
    //      none.

    TClonesArray &lrecp = *fClustersV2;
    new(lrecp[fNClustersV2++]) AliITSclusterV2(r);
 }

//______________________________________________________________________
void AliITSDetTypeRec::DigitsToRecPoints(Int_t evNumber,Int_t lastentry,Option_t *opt, Bool_t v2){
  // cluster finding and reconstruction of space points
  // the condition below will disappear when the geom class will be
  // initialized for all versions - for the moment it is only for v5 !
  // 7 is the SDD beam test version
  // Inputs:
  //      Int_t evNumber   Event number to be processed.
  //      Int_t lastentry  Offset for module when not all of the modules
  //                       are processed.
  //      Option_t *opt    String indicating which ITS sub-detectors should
  //                       be processed. If ="All" then all of the ITS
  //                       sub detectors are processed.

  if(!fGeom){
    Warning("DigitsToRecPoints","fGeom is null!");
    return;
  }
  if(!fLoader){
    Warning("DigitsToRecPoints","ITS loader is null!");
    return;
  }

  const char *all = strstr(opt,"All");
  const char *det[3] = {strstr(opt,"SPD"),strstr(opt,"SDD"),
                        strstr(opt,"SSD")};
  if(!v2) SetDefaultClusterFinders();
  else    SetDefaultClusterFindersV2();
  

  TTree *treeC=fLoader->TreeC();
  if(!treeC){
    MakeTreeC();
    MakeBranchC();
  }
  AliITSClusterFinder *rec     = 0;
  Int_t id,module,first=0;
  for(module=0;module<fGeom->GetIndexMax();module++){
      id       = fGeom->GetModuleType(module);
      if (!all && !det[id]) continue;
      if(det[id]) first = fGeom->GetStartDet(id);
      rec = (AliITSClusterFinder*)GetReconstructionModel(id);
      TClonesArray *itsDigits  = DigitsAddress(id);
      if (!rec) {
          Error("DigitsToRecPoints",
                "The reconstruction class was not instanciated! event=%d",
                evNumber);
          exit(1);
      } 
      ResetDigits();
      TTree *lTD = fLoader->TreeD();
      if (all) {
          lTD->GetEvent(lastentry+module);
      }else {
          lTD->GetEvent(lastentry+(module-first));
      }
      Int_t ndigits = itsDigits->GetEntriesFast();
      if(ndigits>0){
	rec->SetDetTypeRec(this);
	rec->SetITSgeom(fGeom);
	rec->SetDigits(DigitsAddress(id));
	rec->SetClusters(ClustersAddress(id));
	rec->FindRawClusters(module);
      } // end if
      fLoader->TreeR()->Fill();
      ResetRecPoints();
      ResetClustersV2();
      treeC->Fill();
      ResetClusters();
  } 
      
  fLoader->WriteRecPoints("OVERWRITE");
  fLoader->WriteRawClusters("OVERWRITE");
}
//______________________________________________________________________
void AliITSDetTypeRec::DigitsToRecPoints(AliRawReader* rawReader){
  // cluster finding and reconstruction of space points
  // the condition below will disappear when the geom class will be
  // initialized for all versions - for the moment it is only for v5 !
  // 7 is the SDD beam test version
  // Inputs:
  //      Int_t evNumber   Event number to be processed.
  //      Int_t lastentry  Offset for module when not all of the modules
  //                       are processed.
  //      Option_t *opt    String indicating which ITS sub-detectors should
  //                       be processed. If ="All" then all of the ITS
  //                       sub detectors are processed.
  // Outputs:
  //      none.
  // Return:
  //      none.
  if(!fGeom){
    Warning("DigitsToRecPoints","fGeom is null!");
    return;
  }
  if(!fLoader){
    Warning("DigitsToRecPoints","ITS loader is null!");
    return;
  }

  
  AliITSClusterFinderV2 *rec     = 0;
  Int_t id=0;

  if(!fLoader->TreeR()) fLoader->MakeTree("R");
  TTree* cTree = fLoader->TreeR();
  TClonesArray *array=new TClonesArray("AliITSclusterV2",1000);
  cTree->Branch("Clusters",&array);
  delete array;
 
  TClonesArray** clusters = new TClonesArray*[fGeom->GetIndexMax()]; 
  for (Int_t iModule = 0; iModule < fGeom->GetIndexMax(); iModule++) {
    clusters[iModule] = NULL;
  }
  for(id=0;id<3;id++){
    rec = (AliITSClusterFinderV2*)GetReconstructionModel(id);
    rec->SetITSgeom(fGeom);
    if (!rec) {
      Error("DigitsToRecPoints",
	    "The reconstruction class was not instanciated");
      exit(1);
    } 
    rec->RawdataToClusters(rawReader,clusters);    
  } 
  Int_t nClusters =0;
  for(Int_t iModule=0;iModule<fGeom->GetIndexMax();iModule++){
    array = clusters[iModule];
    if(!array){
      Error("DigitsToRecPoints","data for module %d missing!",iModule);
      array = new TClonesArray("AliITSclusterV2");
    }
    cTree->SetBranchAddress("Clusters",&array);
    cTree->Fill();
    nClusters+=array->GetEntriesFast();
    delete array;
  }
  fLoader->WriteRecPoints("OVERWRITE");

  delete[] clusters;
  Info("DigitsToRecPoints", "total number of found clustersV2 in ITS: %d\n", 
       nClusters);
  
}