[u/mrichter/AliRoot.git] / PHOS / AliPHOSSDigitizer.cxx

/**************************************************************************
 * 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 is a TTask that makes SDigits out of Hits
// A Summable Digits is the sum of all hits originating 
// from one primary in one active cell
// A threshold for assignment of the primary to SDigit is applied 
// SDigits are written to TreeS, branch "PHOS"
// AliPHOSSDigitizer with all current parameters is written 
// to TreeS branch "AliPHOSSDigitizer".
// Both branches have the same title. If necessary one can produce 
// another set of SDigits with different parameters. Two versions
// can be distunguished using titles of the branches.
// User case:
//  root [0] AliPHOSSDigitizer * s = new AliPHOSSDigitizer("galice.root")
//  Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
//  root [1] s->ExecuteTask()
//             // Makes SDigitis for all events stored in galice.root
//  root [2] s->SetPedestalParameter(0.001)
//             // One can change parameters of digitization
// root [3] s->SetSDigitsBranch("Pedestal 0.001")
//             // and write them into the new branch
// root [4] s->ExecuteTask("deb all tim")
//             // available parameters:
//             deb - print # of produced SDigitis
//             deb all  - print # and list of produced SDigits
//             tim - print benchmarking information
//
//*-- Author :  Dmitri Peressounko (SUBATECH & KI) 
//////////////////////////////////////////////////////////////////////////////


// --- ROOT system ---
#include "TFile.h"
#include "TTask.h"
#include "TTree.h"
#include "TSystem.h"
#include "TROOT.h"
#include "TFolder.h"
#include "TBenchmark.h"
// --- Standard library ---
#include <iomanip.h>

// --- AliRoot header files ---
#include "AliRun.h"
#include "AliPHOSDigit.h"
#include "AliPHOSHit.h"
#include "AliPHOSSDigitizer.h"


ClassImp(AliPHOSSDigitizer)

           
//____________________________________________________________________________ 
  AliPHOSSDigitizer::AliPHOSSDigitizer():TTask("AliPHOSSDigitizer","") 
{
  // ctor
  fA             = 0;
  fB             = 10000000.;
  fPrimThreshold = 0.01 ;
  fNevents       = 0 ;      
  fSDigits       = 0 ;
  fHits          = 0 ;
  fIsInitialized = kFALSE ;

}

//____________________________________________________________________________ 
AliPHOSSDigitizer::AliPHOSSDigitizer(const char* headerFile, const char *sDigitsTitle):TTask("AliPHOSSDigitizer","")
{
  // ctor
  fA             = 0;
  fB             = 10000000.;
  fPrimThreshold = 0.01 ;
  fNevents       = 0 ;      
  fSDigitsTitle  = sDigitsTitle ;
  fHeadersFile   = headerFile ;
  fIsInitialized = kFALSE ;

  Init();
}

//____________________________________________________________________________ 
AliPHOSSDigitizer::~AliPHOSSDigitizer()
{
  // dtor
  if(fSDigits)
    delete fSDigits ;
  if(fHits)
    delete fHits ;
}
//____________________________________________________________________________ 
void AliPHOSSDigitizer::Init()
{
  // Initialization: open root-file, allocate arrays for hits and sdigits,
  // attach task SDigitizer to the list of PHOS tasks
  // 
  // Initialization can not be done in the default constructor

  if(!fIsInitialized){

    if(fHeadersFile.IsNull())
      fHeadersFile="galice.root" ;

    TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
    
    //if file was not opened yet, read gAlice
    if(file == 0){
      if(fHeadersFile.Contains("rfio"))
	file =	TFile::Open(fHeadersFile,"update") ;
      else
	file = new TFile(fHeadersFile.Data(),"update") ;
      gAlice = (AliRun *) file->Get("gAlice") ;
    }
    
    fHits    = new TClonesArray("AliPHOSHit",1000);
    fSDigits = new TClonesArray("AliPHOSDigit",1000);
    
    //add Task to //YSAlice/tasks/(S)Diditizer/PHOS
    TFolder * alice  = (TFolder*)gROOT->GetListOfBrowsables()->FindObject("YSAlice") ; 
    TTask * aliceSD  = (TTask*)alice->FindObject("tasks/(S)Digitizer") ; 
    TTask * phosSD   = (TTask*)aliceSD->GetListOfTasks()->FindObject("PHOS") ;
    phosSD->Add(this) ; 
    
    fIsInitialized = kTRUE ;
  }
}
//____________________________________________________________________________
void AliPHOSSDigitizer::Exec(Option_t *option) 
{ 
  // Collects all hits in the same active volume into digit
  
  if(!fIsInitialized)
    Init() ;

  if(strstr(option,"tim"))
    gBenchmark->Start("PHOSSDigitizer");
  
  fNevents = (Int_t) gAlice->TreeE()->GetEntries() ; 
  
  Int_t ievent ;
  for(ievent = 0; ievent < fNevents; ievent++){
    gAlice->GetEvent(ievent) ;
    gAlice->SetEvent(ievent) ;
    
    if(gAlice->TreeH()==0){
      cout << "AliPHOSSDigitizer: There is no Hit Tree" << endl;
      return ;
    }
    
    //set address of the hits 
    TBranch * branch = gAlice->TreeH()->GetBranch("PHOS");
    if (branch) 
      branch->SetAddress(&fHits);
    else{
      cout << "ERROR in AliPHOSSDigitizer: "<< endl ;
      cout << "      no branch PHOS in TreeH"<< endl ;
      cout << "      do nothing " << endl ;
      return ;
    }
    
    fSDigits->Clear();
    Int_t nSdigits = 0 ;
    
    
    //Now made SDigits from hits, for PHOS it is the same, so just copy    
    Int_t itrack ;
    for (itrack=0; itrack < gAlice->GetNtrack(); itrack++){
      
      //=========== Get the PHOS branch from Hits Tree for the Primary track itrack
      branch->GetEntry(itrack,0);
      
      Int_t i;
      for ( i = 0 ; i < fHits->GetEntries() ; i++ ) {
	AliPHOSHit * hit = (AliPHOSHit*)fHits->At(i) ;

	// Assign primary number only if contribution is significant
	if( hit->GetEnergy() > fPrimThreshold)
	  new((*fSDigits)[nSdigits]) AliPHOSDigit( hit->GetPrimary(), hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
	else
	  new((*fSDigits)[nSdigits]) AliPHOSDigit( -1               , hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
	
	nSdigits++ ;  
	
      } 
      
    } // loop over tracks
    
    fSDigits->Sort() ;
    
    nSdigits = fSDigits->GetEntriesFast() ;
    fSDigits->Expand(nSdigits) ;
    
    Int_t i ;
    for (i = 0 ; i < nSdigits ; i++) { 
      AliPHOSDigit * digit = (AliPHOSDigit *) fSDigits->At(i) ; 
      digit->SetIndexInList(i) ;     
    }

    if(gAlice->TreeS() == 0)
      gAlice->MakeTree("S") ;
    
    //check, if this branch already exits?
    TBranch * sdigitsBranch = 0;
    TBranch * sdigitizerBranch = 0;
    
    TObjArray * branches = gAlice->TreeS()->GetListOfBranches() ;
    Int_t ibranch;
    Bool_t phosNotFound = kTRUE ;
    Bool_t sdigitizerNotFound = kTRUE ;
    
    for(ibranch = 0;ibranch <branches->GetEntries();ibranch++){
      
      if(phosNotFound){
	sdigitsBranch=(TBranch *) branches->At(ibranch) ;
	if( (strcmp("PHOS",sdigitsBranch->GetName())==0 ) &&
	    (fSDigitsTitle.CompareTo(sdigitsBranch->GetTitle()) == 0) )
	  phosNotFound = kFALSE ;
      }
      if(sdigitizerNotFound){
	sdigitizerBranch = (TBranch *) branches->At(ibranch) ;
	if( (strcmp(sdigitizerBranch->GetName(),"AliPHOSSDigitizer") == 0)&&
	    (fSDigitsTitle.CompareTo(sdigitizerBranch->GetTitle()) == 0) )
	  sdigitizerNotFound = kFALSE ;
      }
    }

    if(!(sdigitizerNotFound && phosNotFound)){
      cout << "AliPHOSSdigitizer error:" << endl ;
      cout << "Can not overwrite existing branches: do not write" << endl ;
      return ;
    }
    
    //Make (if necessary) branches    
    char * file =0;
    if(gSystem->Getenv("CONFIG_SPLIT_FILE")){ //generating file name
      file = new char[strlen(gAlice->GetBaseFile())+20] ;
      sprintf(file,"%s/PHOS.SDigits.root",gAlice->GetBaseFile()) ;
    }
    
    TDirectory *cwd = gDirectory;
    
    //First list of sdigits
    Int_t bufferSize = 32000 ;    
    sdigitsBranch = gAlice->TreeS()->Branch("PHOS",&fSDigits,bufferSize);
    sdigitsBranch->SetTitle(fSDigitsTitle.Data());
    if (file) {
      sdigitsBranch->SetFile(file);
      TIter next( sdigitsBranch->GetListOfBranches());
      TBranch * subbr;
      while ((subbr=(TBranch*)next())) {
	subbr->SetFile(file);
      }   
      cwd->cd();
    } 
      
    //second - SDigitizer
    Int_t splitlevel = 0 ;
    AliPHOSSDigitizer * sd = this ;
    sdigitizerBranch = gAlice->TreeS()->Branch("AliPHOSSDigitizer","AliPHOSSDigitizer",
					       &sd,bufferSize,splitlevel); 
    sdigitizerBranch->SetTitle(fSDigitsTitle.Data());
    if (file) {
      sdigitizerBranch->SetFile(file);
      TIter next( sdigitizerBranch->GetListOfBranches());
      TBranch * subbr ;
      while ((subbr=(TBranch*)next())) {
	subbr->SetFile(file);
      }   
      cwd->cd();
      delete file;
    }

    sdigitsBranch->Fill() ;
    sdigitizerBranch->Fill() ;
    gAlice->TreeS()->Write(0,TObject::kOverwrite) ;
    
    if(strstr(option,"deb"))
      PrintSDigits(option) ;
    
  }
  
  if(strstr(option,"tim")){
    gBenchmark->Stop("PHOSSDigitizer");
    cout << "AliPHOSSDigitizer:" << endl ;
    cout << "   took " << gBenchmark->GetCpuTime("PHOSSDigitizer") << " seconds for SDigitizing " 
	 <<  gBenchmark->GetCpuTime("PHOSSDigitizer")/fNevents << " seconds per event " << endl ;
    cout << endl ;
  }
  
  
}
//__________________________________________________________________
void AliPHOSSDigitizer::SetSDigitsBranch(const char * title )
{
  // Setting title to branch SDigits 
  if(!fSDigitsTitle.IsNull())
    cout << "AliPHOSSdigitizer: changing SDigits file from " <<fSDigitsTitle.Data() << " to " << title << endl ;
  fSDigitsTitle=title ;
}
//__________________________________________________________________
void AliPHOSSDigitizer::Print(Option_t* option)const
{
  // Prints parameters of SDigitizer
  cout << "------------------- "<< GetName() << " -------------" << endl ;
  cout << "   Writing SDigitis to branch with title  " << fSDigitsTitle.Data() << endl ;
  cout << "   with digitization parameters  A = " << fA << endl ;
  cout << "                                 B = " << fB << endl ;
  cout << "   Threshold for Primary assignment= " << fPrimThreshold << endl ; 
  cout << "---------------------------------------------------"<<endl ;
  
}
//__________________________________________________________________
Bool_t AliPHOSSDigitizer::operator==( AliPHOSSDigitizer const &sd )const
{
  // Equal operator.
  // SDititizers are equal if their pedestal, slope and threshold are equal

  if( (fA==sd.fA)&&(fB==sd.fB)&&(fPrimThreshold==sd.fPrimThreshold))
    return kTRUE ;
  else
    return kFALSE ;
}
//__________________________________________________________________
void AliPHOSSDigitizer::PrintSDigits(Option_t * option)
{
  // Prints list of digits produced in the current pass of AliPHOSDigitizer
  
  cout << "AliPHOSSDigitizer: " << endl ;
  cout << "       Number of entries in SDigits list  " << fSDigits->GetEntriesFast() << endl ;
  cout << endl ;
  
  if(strstr(option,"all")){// print all digits
    
    //loop over digits
    AliPHOSDigit * digit;
    cout << "SDigit Id " << " Amplitude " <<  " Index "  <<  " Nprim " << " Primaries list " <<  endl;    
    Int_t index ;
    for (index = 0 ; index < fSDigits->GetEntries() ; index++) {
      digit = (AliPHOSDigit * )  fSDigits->At(index) ;
      cout << setw(8)  <<  digit->GetId() << " "  << 	setw(3)  <<  digit->GetAmp() <<   "  "  
	   << setw(6)  <<  digit->GetIndexInList() << "  "   
	   << setw(5)  <<  digit->GetNprimary() <<"  ";
      
      Int_t iprimary;
      for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++)
	cout << setw(5)  <<  digit->GetPrimary(iprimary+1) << "  ";
      cout << endl;  	 
    }
    
  }
}
Commit	Line	Data
990119d6	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/* $Id$ */
	17
	18	//_________________________________________________________________________
7acf6008	19	// This is a TTask that makes SDigits out of Hits
	20	// A Summable Digits is the sum of all hits originating
	21	// from one primary in one active cell
	22	// A threshold for assignment of the primary to SDigit is applied
	23	// SDigits are written to TreeS, branch "PHOS"
	24	// AliPHOSSDigitizer with all current parameters is written
	25	// to TreeS branch "AliPHOSSDigitizer".
f035f6ce	26	// Both branches have the same title. If necessary one can produce
	27	// another set of SDigits with different parameters. Two versions
	28	// can be distunguished using titles of the branches.
	29	// User case:
a4e98857	30	// root [0] AliPHOSSDigitizer * s = new AliPHOSSDigitizer("galice.root")
	31	// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
	32	// root [1] s->ExecuteTask()
f035f6ce	33	// // Makes SDigitis for all events stored in galice.root
a4e98857	34	// root [2] s->SetPedestalParameter(0.001)
f035f6ce	35	// // One can change parameters of digitization
3de072dc	36	// root [3] s->SetSDigitsBranch("Pedestal 0.001")
f035f6ce	37	// // and write them into the new branch
3de072dc	38	// root [4] s->ExecuteTask("deb all tim")
f035f6ce	39	// // available parameters:
	40	// deb - print # of produced SDigitis
	41	// deb all - print # and list of produced SDigits
	42	// tim - print benchmarking information
990119d6	43	//
	44	//*-- Author : Dmitri Peressounko (SUBATECH & KI)
	45	//////////////////////////////////////////////////////////////////////////////
	46
f035f6ce	47
990119d6	48	// --- ROOT system ---
7acf6008	49	#include "TFile.h"
990119d6	50	#include "TTask.h"
	51	#include "TTree.h"
	52	#include "TSystem.h"
7acf6008	53	#include "TROOT.h"
	54	#include "TFolder.h"
	55	#include "TBenchmark.h"
990119d6	56	// --- Standard library ---
7acf6008	57	#include <iomanip.h>
990119d6	58
990119d6	59	// --- AliRoot header files ---
7acf6008	60	#include "AliRun.h"
990119d6	61	#include "AliPHOSDigit.h"
990119d6	62	#include "AliPHOSHit.h"
990119d6	63	#include "AliPHOSSDigitizer.h"
990119d6	64
990119d6	65
	66	ClassImp(AliPHOSSDigitizer)
	67
	68
	69	//____________________________________________________________________________
	70	AliPHOSSDigitizer::AliPHOSSDigitizer():TTask("AliPHOSSDigitizer","")
	71	{
	72	// ctor
2bd5457f	73	fA = 0;
2bd5457f	74	fB = 10000000.;
990119d6	75	fPrimThreshold = 0.01 ;
2bd5457f	76	fNevents = 0 ;
	77	fSDigits = 0 ;
	78	fHits = 0 ;
7acf6008	79	fIsInitialized = kFALSE ;
990119d6	80
990119d6	81	}
7acf6008	82
990119d6	83	//____________________________________________________________________________
7acf6008	84	AliPHOSSDigitizer::AliPHOSSDigitizer(const char* headerFile, const char *sDigitsTitle):TTask("AliPHOSSDigitizer","")
990119d6	85	{
990119d6	86	// ctor
2bd5457f	87	fA = 0;
2bd5457f	88	fB = 10000000.;
990119d6	89	fPrimThreshold = 0.01 ;
2bd5457f	90	fNevents = 0 ;
	91	fSDigitsTitle = sDigitsTitle ;
	92	fHeadersFile = headerFile ;
	93	fIsInitialized = kFALSE ;
7acf6008	94
2bd5457f	95	Init();
990119d6	96	}
	97
	98	//____________________________________________________________________________
7acf6008	99	AliPHOSSDigitizer::~AliPHOSSDigitizer()
990119d6	100	{
990119d6	101	// dtor
7acf6008	102	if(fSDigits)
	103	delete fSDigits ;
	104	if(fHits)
	105	delete fHits ;
990119d6	106	}
7acf6008	107	//____________________________________________________________________________
a4e98857	108	void AliPHOSSDigitizer::Init()
a4e98857	109	{
2bd5457f	110	// Initialization: open root-file, allocate arrays for hits and sdigits,
	111	// attach task SDigitizer to the list of PHOS tasks
	112	//
a4e98857	113	// Initialization can not be done in the default constructor
7acf6008	114
7acf6008	115	if(!fIsInitialized){
990119d6	116
7acf6008	117	if(fHeadersFile.IsNull())
7acf6008	118	fHeadersFile="galice.root" ;
990119d6	119
7acf6008	120	TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
	121
	122	//if file was not opened yet, read gAlice
	123	if(file == 0){
2bd5457f	124	if(fHeadersFile.Contains("rfio"))
	125	file = TFile::Open(fHeadersFile,"update") ;
	126	else
	127	file = new TFile(fHeadersFile.Data(),"update") ;
7acf6008	128	gAlice = (AliRun *) file->Get("gAlice") ;
	129	}
	130
	131	fHits = new TClonesArray("AliPHOSHit",1000);
	132	fSDigits = new TClonesArray("AliPHOSDigit",1000);
	133
2bd5457f	134	//add Task to //YSAlice/tasks/(S)Diditizer/PHOS
	135	TFolder * alice = (TFolder*)gROOT->GetListOfBrowsables()->FindObject("YSAlice") ;
	136	TTask * aliceSD = (TTask*)alice->FindObject("tasks/(S)Digitizer") ;
	137	TTask * phosSD = (TTask*)aliceSD->GetListOfTasks()->FindObject("PHOS") ;
	138	phosSD->Add(this) ;
7acf6008	139
	140	fIsInitialized = kTRUE ;
	141	}
	142	}
990119d6	143	//____________________________________________________________________________
a4e98857	144	void AliPHOSSDigitizer::Exec(Option_t *option)
	145	{
	146	// Collects all hits in the same active volume into digit
990119d6	147
7acf6008	148	if(!fIsInitialized)
7acf6008	149	Init() ;
990119d6	150
7acf6008	151	if(strstr(option,"tim"))
7acf6008	152	gBenchmark->Start("PHOSSDigitizer");
990119d6	153
7acf6008	154	fNevents = (Int_t) gAlice->TreeE()->GetEntries() ;
990119d6	155
	156	Int_t ievent ;
	157	for(ievent = 0; ievent < fNevents; ievent++){
	158	gAlice->GetEvent(ievent) ;
	159	gAlice->SetEvent(ievent) ;
	160
	161	if(gAlice->TreeH()==0){
	162	cout << "AliPHOSSDigitizer: There is no Hit Tree" << endl;
	163	return ;
	164	}
	165
7acf6008	166	//set address of the hits
	167	TBranch * branch = gAlice->TreeH()->GetBranch("PHOS");
	168	if (branch)
	169	branch->SetAddress(&fHits);
	170	else{
	171	cout << "ERROR in AliPHOSSDigitizer: "<< endl ;
	172	cout << " no branch PHOS in TreeH"<< endl ;
	173	cout << " do nothing " << endl ;
	174	return ;
	175	}
990119d6	176
7acf6008	177	fSDigits->Clear();
990119d6	178	Int_t nSdigits = 0 ;
990119d6	179
990119d6	180
7acf6008	181	//Now made SDigits from hits, for PHOS it is the same, so just copy
990119d6	182	Int_t itrack ;
077397f6	183	for (itrack=0; itrack < gAlice->GetNtrack(); itrack++){
990119d6	184
077397f6	185	//=========== Get the PHOS branch from Hits Tree for the Primary track itrack
077397f6	186	branch->GetEntry(itrack,0);
990119d6	187
990119d6	188	Int_t i;
7acf6008	189	for ( i = 0 ; i < fHits->GetEntries() ; i++ ) {
7acf6008	190	AliPHOSHit * hit = (AliPHOSHit*)fHits->At(i) ;
990119d6	191
	192	// Assign primary number only if contribution is significant
	193	if( hit->GetEnergy() > fPrimThreshold)
077397f6	194	new((*fSDigits)[nSdigits]) AliPHOSDigit( hit->GetPrimary(), hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
990119d6	195	else
077397f6	196	new((*fSDigits)[nSdigits]) AliPHOSDigit( -1 , hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
990119d6	197
990119d6	198	nSdigits++ ;
990119d6	199
990119d6	200	}
	201
	202	} // loop over tracks
	203
7acf6008	204	fSDigits->Sort() ;
990119d6	205
7acf6008	206	nSdigits = fSDigits->GetEntriesFast() ;
7acf6008	207	fSDigits->Expand(nSdigits) ;
990119d6	208
	209	Int_t i ;
	210	for (i = 0 ; i < nSdigits ; i++) {
7acf6008	211	AliPHOSDigit * digit = (AliPHOSDigit *) fSDigits->At(i) ;
990119d6	212	digit->SetIndexInList(i) ;
990119d6	213	}
7acf6008	214
	215	if(gAlice->TreeS() == 0)
	216	gAlice->MakeTree("S") ;
	217
	218	//check, if this branch already exits?
	219	TBranch * sdigitsBranch = 0;
	220	TBranch * sdigitizerBranch = 0;
	221
	222	TObjArray * branches = gAlice->TreeS()->GetListOfBranches() ;
	223	Int_t ibranch;
	224	Bool_t phosNotFound = kTRUE ;
	225	Bool_t sdigitizerNotFound = kTRUE ;
	226
	227	for(ibranch = 0;ibranch <branches->GetEntries();ibranch++){
	228
	229	if(phosNotFound){
	230	sdigitsBranch=(TBranch *) branches->At(ibranch) ;
	231	if( (strcmp("PHOS",sdigitsBranch->GetName())==0 ) &&
	232	(fSDigitsTitle.CompareTo(sdigitsBranch->GetTitle()) == 0) )
	233	phosNotFound = kFALSE ;
	234	}
	235	if(sdigitizerNotFound){
	236	sdigitizerBranch = (TBranch *) branches->At(ibranch) ;
	237	if( (strcmp(sdigitizerBranch->GetName(),"AliPHOSSDigitizer") == 0)&&
	238	(fSDigitsTitle.CompareTo(sdigitizerBranch->GetTitle()) == 0) )
	239	sdigitizerNotFound = kFALSE ;
	240	}
	241	}
	242
	243	if(!(sdigitizerNotFound && phosNotFound)){
	244	cout << "AliPHOSSdigitizer error:" << endl ;
	245	cout << "Can not overwrite existing branches: do not write" << endl ;
	246	return ;
	247	}
990119d6	248
7acf6008	249	//Make (if necessary) branches
	250	char * file =0;
	251	if(gSystem->Getenv("CONFIG_SPLIT_FILE")){ //generating file name
	252	file = new char[strlen(gAlice->GetBaseFile())+20] ;
	253	sprintf(file,"%s/PHOS.SDigits.root",gAlice->GetBaseFile()) ;
	254	}
	255
	256	TDirectory *cwd = gDirectory;
	257
	258	//First list of sdigits
	259	Int_t bufferSize = 32000 ;
	260	sdigitsBranch = gAlice->TreeS()->Branch("PHOS",&fSDigits,bufferSize);
	261	sdigitsBranch->SetTitle(fSDigitsTitle.Data());
	262	if (file) {
	263	sdigitsBranch->SetFile(file);
	264	TIter next( sdigitsBranch->GetListOfBranches());
761e34c0	265	TBranch * subbr;
	266	while ((subbr=(TBranch*)next())) {
	267	subbr->SetFile(file);
7acf6008	268	}
	269	cwd->cd();
	270	}
	271
	272	//second - SDigitizer
	273	Int_t splitlevel = 0 ;
	274	AliPHOSSDigitizer * sd = this ;
	275	sdigitizerBranch = gAlice->TreeS()->Branch("AliPHOSSDigitizer","AliPHOSSDigitizer",
	276	&sd,bufferSize,splitlevel);
	277	sdigitizerBranch->SetTitle(fSDigitsTitle.Data());
	278	if (file) {
	279	sdigitizerBranch->SetFile(file);
	280	TIter next( sdigitizerBranch->GetListOfBranches());
761e34c0	281	TBranch * subbr ;
	282	while ((subbr=(TBranch*)next())) {
	283	subbr->SetFile(file);
7acf6008	284	}
	285	cwd->cd();
	286	delete file;
	287	}
	288
761e34c0	289	sdigitsBranch->Fill() ;
761e34c0	290	sdigitizerBranch->Fill() ;
990119d6	291	gAlice->TreeS()->Write(0,TObject::kOverwrite) ;
7acf6008	292
	293	if(strstr(option,"deb"))
	294	PrintSDigits(option) ;
	295
990119d6	296	}
7acf6008	297
	298	if(strstr(option,"tim")){
	299	gBenchmark->Stop("PHOSSDigitizer");
	300	cout << "AliPHOSSDigitizer:" << endl ;
	301	cout << " took " << gBenchmark->GetCpuTime("PHOSSDigitizer") << " seconds for SDigitizing "
	302	<< gBenchmark->GetCpuTime("PHOSSDigitizer")/fNevents << " seconds per event " << endl ;
	303	cout << endl ;
	304	}
	305
	306
990119d6	307	}
990119d6	308	//__________________________________________________________________
a4e98857	309	void AliPHOSSDigitizer::SetSDigitsBranch(const char * title )
	310	{
	311	// Setting title to branch SDigits
7acf6008	312	if(!fSDigitsTitle.IsNull())
	313	cout << "AliPHOSSdigitizer: changing SDigits file from " <<fSDigitsTitle.Data() << " to " << title << endl ;
	314	fSDigitsTitle=title ;
990119d6	315	}
990119d6	316	//__________________________________________________________________
a4e98857	317	void AliPHOSSDigitizer::Print(Option_t* option)const
	318	{
	319	// Prints parameters of SDigitizer
990119d6	320	cout << "------------------- "<< GetName() << " -------------" << endl ;
7acf6008	321	cout << " Writing SDigitis to branch with title " << fSDigitsTitle.Data() << endl ;
	322	cout << " with digitization parameters A = " << fA << endl ;
	323	cout << " B = " << fB << endl ;
	324	cout << " Threshold for Primary assignment= " << fPrimThreshold << endl ;
990119d6	325	cout << "---------------------------------------------------"<<endl ;
7acf6008	326
990119d6	327	}
990119d6	328	//__________________________________________________________________
a4e98857	329	Bool_t AliPHOSSDigitizer::operator==( AliPHOSSDigitizer const &sd )const
a4e98857	330	{
3de072dc	331	// Equal operator.
	332	// SDititizers are equal if their pedestal, slope and threshold are equal
	333
990119d6	334	if( (fA==sd.fA)&&(fB==sd.fB)&&(fPrimThreshold==sd.fPrimThreshold))
	335	return kTRUE ;
	336	else
	337	return kFALSE ;
	338	}
7acf6008	339	//__________________________________________________________________
a4e98857	340	void AliPHOSSDigitizer::PrintSDigits(Option_t * option)
	341	{
	342	// Prints list of digits produced in the current pass of AliPHOSDigitizer
7acf6008	343
	344	cout << "AliPHOSSDigitizer: " << endl ;
	345	cout << " Number of entries in SDigits list " << fSDigits->GetEntriesFast() << endl ;
	346	cout << endl ;
	347
	348	if(strstr(option,"all")){// print all digits
	349
	350	//loop over digits
	351	AliPHOSDigit * digit;
	352	cout << "SDigit Id " << " Amplitude " << " Index " << " Nprim " << " Primaries list " << endl;
	353	Int_t index ;
	354	for (index = 0 ; index < fSDigits->GetEntries() ; index++) {
	355	digit = (AliPHOSDigit * ) fSDigits->At(index) ;
	356	cout << setw(8) << digit->GetId() << " " << setw(3) << digit->GetAmp() << " "
	357	<< setw(6) << digit->GetIndexInList() << " "
	358	<< setw(5) << digit->GetNprimary() <<" ";
	359
	360	Int_t iprimary;
	361	for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++)
	362	cout << setw(5) << digit->GetPrimary(iprimary+1) << " ";
	363	cout << endl;
	364	}
	365
	366	}
	367	}