]> git.uio.no Git - u/mrichter/AliRoot.git/blobdiff - STEER/AliRunDigitizer.cxx
Added methods for finding a given module in the DDL map (F. Prino)
[u/mrichter/AliRoot.git] / STEER / AliRunDigitizer.cxx
index e62af6970880b9243c3d0e0d45d798bf95353a33..027c19b811c3b248c080328282ab5c344df19c81 100644 (file)
@@ -13,9 +13,9 @@
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/
 
-/* $Header$ */
+/* $Id$ */
 
-////////////////////////////////////////////////////////////////////////
+//_______________________________________________________________________
 //
 // AliRunDigitizer.cxx
 //
@@ -48,7 +48,7 @@
 // The default output is to the signal file (stream 0). This can be 
 // changed with the SetOutputFile(TString fn)  method.
 //
-// Single input file is permitted. Maximum kMaxStreamsToMerge can be merged.
+// Single input file is permitted. Maximum MAXSTREAMSTOMERGE can be merged.
 // Input from the memory (on-the-fly merging) is not yet 
 // supported, as well as access to the input data by invoking methods
 // on the output data.
 //  manager->SetNrOfEventsToWrite(1);
 //  manager->Exec("");
 //
-//////////////////////////////////////////////////////////////////////// 
+//_______________________________________________________________________ 
 
 // system includes
 
-#include <Riostream.h>
-
 // ROOT includes
 
-#include "TFile.h"
-#include "TList.h"
-#include "TParticle.h"
-#include "TTree.h"
+#include <Riostream.h>
+class TList;
 
 // AliROOT includes
 
+#include "AliLog.h"
 #include "AliDigitizer.h"
 #include "AliHeader.h"
+#include "AliLoader.h"
 #include "AliMergeCombi.h"
 #include "AliRun.h"
 #include "AliRunDigitizer.h"
-#include "AliStream.h"
+#include "AliRunLoader.h"
 
 ClassImp(AliRunDigitizer)
 
+const TString AliRunDigitizer::fgkDefOutFolderName("Output");
+const TString AliRunDigitizer::fgkBaseInFolderName("Input");
+
+
 //_______________________________________________________________________
-AliRunDigitizer::AliRunDigitizer():
-  fkMASKSTEP(0),
-  fOutputFileName(0),
-  fOutputDirName(0),
-  fOutput(0),
-  fEvent(0),
-  fNrOfEventsToWrite(0),
-  fNrOfEventsWritten(0),
-  fCopyTreesFromInput(0),
-  fTreeD(0),
-  fTreeDTPC(0),
-  fTreeDTRD(0),
-  fTreeR(0),
-  fNinputs(0),
-  fNinputsGiven(0),
-  fInputStreams(0),
-  fTreeDTPCBaseName(0),
-  fTreeTPCSBaseName(0),
-  fCombi(0),
-  fCombination(0),
-  fCombinationFileName(0),
-  fDebug(0)
+AliRunDigitizer::AliRunDigitizer(): TTask("AliRunDigitizer","The manager for Merging"),
+ fkMASKSTEP(0),
+ fOutputFileName(0),
+ fOutputDirName(0),
+ fEvent(0),
+ fNrOfEventsToWrite(0),
+ fNrOfEventsWritten(0),
+ fCopyTreesFromInput(0),
+ fNinputs(0),
+ fNinputsGiven(0),
+ fInputStreams(0x0),
+ fOutRunLoader(0x0),
+ fOutputInitialized(kFALSE),
+ fCombi(0),
+ fCombination(0),
+ fCombinationFileName(0)
 {
   //
-  // default ctor, where no new objects can be created
+  // root requires default ctor, where no new objects can be created
   // do not use this ctor, it is supplied only for root needs
+}
+
+//_______________________________________________________________________
+AliRunDigitizer::AliRunDigitizer(Int_t nInputStreams, Int_t sperb):
+ TTask("AliRunDigitizer","The manager for Merging"),
+ fkMASKSTEP(10000000),
+ fOutputFileName(""),
+ fOutputDirName("."),
+ fEvent(0),
+ fNrOfEventsToWrite(-1),
+ fNrOfEventsWritten(0),
+ fCopyTreesFromInput(-1),
+ fNinputs(nInputStreams),
+ fNinputsGiven(0),
+ fInputStreams(new TClonesArray("AliStream",nInputStreams)),
+ fOutRunLoader(0x0),
+ fOutputInitialized(kFALSE),
+ fCombi(new AliMergeCombi(nInputStreams,sperb)),
+ fCombination(MAXSTREAMSTOMERGE),
+ fCombinationFileName(0)
+
+{
+  //
+  // ctor which should be used to create 
+  // a manager for merging/digitization
   //
-  for (Int_t i=0;i<kMaxStreamsToMerge;i++) {
-    fArrayTreeS[i]=fArrayTreeH[i]=fArrayTreeTPCS[i]=fArrayTreeTRDS[i]=NULL;
-    fInputFiles[i]=0;
+  if (nInputStreams == 0) 
+   {//kidding
+    AliFatal("Specify nr of input streams");
+    return;
+   }
+  Int_t i;
+  
+  fkMASK[0] = 0;
+  
+  for (i=1;i<MAXSTREAMSTOMERGE;i++) 
+   {
+    fkMASK[i] = fkMASK[i-1] + fkMASKSTEP;
+   }
+  
+  TClonesArray &lInputStreams = *fInputStreams;
+  
+  new(lInputStreams[0]) AliStream(fgkBaseInFolderName+(Long_t)0,"UPDATE");
+  for (i=1;i<nInputStreams;i++) {
+    new(lInputStreams[i]) AliStream(fgkBaseInFolderName+(Long_t)i,"READ");
   }
 }
-
 //_______________________________________________________________________
+
 AliRunDigitizer::AliRunDigitizer(const AliRunDigitizer& dig):
-  TTask(dig),
-  fkMASKSTEP(0),
-  fOutputFileName(0),
-  fOutputDirName(0),
-  fOutput(0),
-  fEvent(0),
-  fNrOfEventsToWrite(0),
-  fNrOfEventsWritten(0),
-  fCopyTreesFromInput(0),
-  fTreeD(0),
-  fTreeDTPC(0),
-  fTreeDTRD(0),
-  fTreeR(0),
-  fNinputs(0),
-  fNinputsGiven(0),
-  fInputStreams(0),
-  fTreeDTPCBaseName(0),
-  fTreeTPCSBaseName(0),
-  fCombi(0),
-  fCombination(0),
-  fCombinationFileName(0),
-  fDebug(0)
+ TTask(dig),
+ fkMASKSTEP(0),
+ fOutputFileName(0),
+ fOutputDirName(0),
+ fEvent(0),
+ fNrOfEventsToWrite(0),
+ fNrOfEventsWritten(0),
+ fCopyTreesFromInput(0),
+ fNinputs(0),
+ fNinputsGiven(0),
+ fInputStreams(0x0),
+ fOutRunLoader(0x0),
+ fOutputInitialized(kFALSE),
+ fCombi(0),
+ fCombination(0),
+ fCombinationFileName(0)
 {
   //
   // Copy ctor
   //
   dig.Copy(*this);
 }
-
 //_______________________________________________________________________
-void AliRunDigitizer::Copy(AliRunDigitizer&) const
-{
-  Fatal("Copy","Not installed\n");
-}
 
-
-//_______________________________________________________________________
-AliRunDigitizer::AliRunDigitizer(Int_t nInputStreams, Int_t sperb):
-  TTask("AliRunDigitizer","The manager for Merging"),
-  fkMASKSTEP(10000000),
-  fOutputFileName(""),
-  fOutputDirName("."),
-  fOutput(0),
-  fEvent(0),
-  fNrOfEventsToWrite(-1),
-  fNrOfEventsWritten(0),
-  fCopyTreesFromInput(-1),
-  fTreeD(0),
-  fTreeDTPC(0),
-  fTreeDTRD(0),
-  fTreeR(0),
-  fNinputs(nInputStreams),
-  fNinputsGiven(0),
-  fInputStreams(new TClonesArray("AliStream",nInputStreams)),
-  fTreeDTPCBaseName("TreeD_75x40_100x60_150x60_"),
-  fTreeTPCSBaseName("TreeS_75x40_100x60_150x60_"),
-  fCombi(new AliMergeCombi(nInputStreams,sperb)),
-  fCombination(kMaxStreamsToMerge),
-  fCombinationFileName(0),
-  fDebug(0)
+void AliRunDigitizer::Copy(TObject&) const
 {
   //
-  // ctor which should be used to create a manager for merging/digitization
+  // Non implemented copy function
   //
-  if (nInputStreams == 0) {
-    Error("AliRunDigitizer","Specify nr of input streams");
-    return;
-  }
-  for (Int_t i=0;i<kMaxStreamsToMerge;i++) {
-    fArrayTreeS[i]=fArrayTreeH[i]=fArrayTreeTPCS[i]=fArrayTreeTRDS[i]=NULL;
-    fCombination[i]=-1;
-  }
-  fkMASK[0] = 0;
-  for (Int_t i=1;i<kMaxStreamsToMerge;i++) {
-    fkMASK[i] = fkMASK[i-1] + fkMASKSTEP;
-  }
-
-  TClonesArray &lInputStreams = *fInputStreams;
-// the first Input is open RW to be output as well
-  new(lInputStreams[0]) AliStream("UPDATE");
-  for (Int_t i=1;i<nInputStreams;i++) {
-    new(lInputStreams[i]) AliStream("READ");
-  }
-
-  for (Int_t i=0; i<kMaxStreamsToMerge; i++) fInputFiles[i]=0;
+  AliFatal("Not installed");
 }
 
 //_______________________________________________________________________
-AliRunDigitizer::~AliRunDigitizer() {
-// dtor
 
-// do not delete subtasks, let the creator delete them
-  if (GetListOfTasks()) 
-    GetListOfTasks()->Clear("nodelete");
-  
-    delete fInputStreams;
-    delete fCombi;
+AliRunDigitizer::~AliRunDigitizer() 
+{
+  //
+  // dtor
+  //
+  delete fInputStreams;
+  delete fCombi;
+  delete fOutRunLoader;
 }
-
 //_______________________________________________________________________
 void AliRunDigitizer::AddDigitizer(AliDigitizer *digitizer)
 {
-// add digitizer to the list of active digitizers
+  //
+  // add digitizer to the list of active digitizers
+  //
   this->Add(digitizer);
 }
-
 //_______________________________________________________________________
-void AliRunDigitizer::SetInputStream(Int_t i, const char *inputFile)
+void AliRunDigitizer::SetInputStream(Int_t i, const char *inputFile, TString foldername)
 {
+//
+// Sets the name of the input file
+//
   if (i > fInputStreams->GetLast()) {
-    Error("SetInputStream","Input stream number too high");
+    AliError("Input stream number too high");
     return;
   }
-  static_cast<AliStream*>(fInputStreams->At(i))->AddFile(inputFile);
+  AliStream * stream = static_cast<AliStream*>(fInputStreams->At(i)) ; 
+  if ( !foldername.IsNull() ) {
+    if ( i > 0 ) 
+      foldername += i ; // foldername should stay unchanged for the default output 
+    stream->SetFolderName(foldername) ;
+  } 
+  stream->AddFile(inputFile);
 }
 
 //_______________________________________________________________________
 void AliRunDigitizer::Digitize(Option_t* option)
 {
-// get a new combination of inputs, connect input trees and loop 
-// over all digitizers
+// get a new combination of inputs, loads events to folders
 
 // take gAlice from the first input file. It is needed to access
 //  geometry data
 // If gAlice is already in memory, use it
-  if (!gAlice) {
-    if (!static_cast<AliStream*>(fInputStreams->At(0))->ImportgAlice()) {
-      cerr<<"gAlice object not found in the first file of "
-         <<"the 1st stream"<<endl;
-      return;
-    }
-  }
-  if (!InitGlobal()) {
-    cerr<<"False from InitGlobal"<<endl;
-    return;
-  }
+  
+  if (!static_cast<AliStream*>(fInputStreams->At(0))->ImportgAlice()) 
+   {
+     AliError("Error occured while getting gAlice from Input 0");
+     return;
+   }
+    
+  if (!InitGlobal()) //calls Init() for all (sub)digitizers
+   {
+     AliError("InitGlobal returned error");
+     return;
+   }
+   
   Int_t eventsCreated = 0;
 // loop until there is anything on the input in case fNrOfEventsToWrite < 0
-  while ((eventsCreated++ < fNrOfEventsToWrite) || (fNrOfEventsToWrite < 0)) {
-    if (!ConnectInputTrees()) break;
-    InitEvent();
-// loop over all registered digitizers and let them do the work
-    ExecuteTasks(option);
-    CleanTasks();
-    FinishEvent();
-  }
+  while ((eventsCreated++ < fNrOfEventsToWrite) || (fNrOfEventsToWrite < 0)) 
+   {
+      if (!ConnectInputTrees()) break;
+      InitEvent();//this must be after call of Connect Input tress.
+      if (fOutRunLoader)
+       {
+         fOutRunLoader->SetEventNumber(eventsCreated-1);
+       }
+      static_cast<AliStream*>(fInputStreams->At(0))->ImportgAlice(); // use gAlice of the first input stream
+      ExecuteTasks(option);// loop over all registered digitizers and let them do the work
+      FinishEvent();
+      CleanTasks();
+   }
   FinishGlobal();
 }
 
 //_______________________________________________________________________
 Bool_t AliRunDigitizer::ConnectInputTrees()
 {
-// fill arrays fArrayTreeS, fArrayTreeH and fArrayTreeTPCS with 
-// pointers to the correct events according fCombination values
-// null pointers can be in the output, AliDigitizer has to check it
-
-  TTree *tree;
-  char treeName[50];
-  Int_t serialNr;
-  Int_t eventNr[kMaxStreamsToMerge], delta[kMaxStreamsToMerge];
+  //
+  // loads events 
+  //
+  Int_t eventNr[MAXSTREAMSTOMERGE], delta[MAXSTREAMSTOMERGE];
   fCombi->Combination(eventNr, delta);
-  for (Int_t i=0;i<fNinputs;i++) {
-    if (delta[i] == 1) {
-      AliStream *iStream = static_cast<AliStream*>(fInputStreams->At(i));
-      if (!iStream->NextEventInStream(serialNr)) return kFALSE;
-      fInputFiles[i]=iStream->CurrentFile();
-      sprintf(treeName,"TreeS%d",serialNr);
-      tree = static_cast<TTree*>(iStream->CurrentFile()->Get(treeName));
-      if (fArrayTreeS[i]) {
-       delete fArrayTreeS[i];
-       fArrayTreeS[i] = 0;
-      }
-      fArrayTreeS[i] = tree;
-      sprintf(treeName,"TreeH%d",serialNr);
-      tree = static_cast<TTree*>(iStream->CurrentFile()->Get(treeName));
-      if (fArrayTreeH[i]) {
-       delete fArrayTreeH[i];
-       fArrayTreeH[i] = 0;
-      }
-      fArrayTreeH[i] = tree;
-      sprintf(treeName,"%s%d",fTreeTPCSBaseName,serialNr);
-      tree = static_cast<TTree*>(iStream->CurrentFile()->Get(treeName));
-      if (fArrayTreeTPCS[i]) {
-       delete fArrayTreeTPCS[i];
-       fArrayTreeTPCS[i] = 0;
-      }
-      fArrayTreeTPCS[i] = tree;
-      sprintf(treeName,"TreeS%d_TRD",serialNr);
-      tree = static_cast<TTree*>(iStream->CurrentFile()->Get(treeName));
-      if (fArrayTreeTRDS[i]) {
-       delete fArrayTreeTRDS[i];
-       fArrayTreeTRDS[i] = 0;
-      }
-      fArrayTreeTRDS[i] = tree;
-    } else if (delta[i] != 0) {
-      Error("ConnectInputTrees","Only delta 0 or 1 is implemented");
+  for (Int_t i=0;i<fNinputs;i++) 
+   {
+    if (delta[i] == 1)
+     {
+      AliStream *iStream = static_cast<AliStream*>(fInputStreams->At(i));//gets the "i" defined  in combination
+      if (!iStream->NextEventInStream()) return kFALSE; //sets serial number
+     } 
+    else if (delta[i] != 0) 
+     {
+      AliError("Only delta 0 or 1 is implemented");
       return kFALSE;
-    }
-  }
+     }
+   }
+
   return kTRUE;
 }
 
 //_______________________________________________________________________
 Bool_t AliRunDigitizer::InitGlobal()
 {
-// called once before Digitize() is called, initialize digitizers and output
-
-  TList* subTasks = GetListOfTasks();
+  //
+  // Method called once before Digitize() is called
+  // initialize digitizers and output
+  //
+  fOutputInitialized = kFALSE;
+  TList* subTasks = this->GetListOfTasks();
   if (subTasks) {
-    subTasks->ForEach(AliDigitizer,Init)();
-  }  
+    TIter next(subTasks);
+    while (AliDigitizer * dig = (AliDigitizer *) next())
+     dig->Init();
+  }
   return kTRUE;
 }
 
 //_______________________________________________________________________
+
 void AliRunDigitizer::SetOutputFile(TString fn)
-// the output will be to separate file, not to the signal file
 {
+  //
+  // The output will be to separate file, 
+  // not to the signal file here should be protection 
+  //to avoid setting the same file as any input 
+  //
+  AliInfo(Form("Setting Output File Name %s ",fn.Data()));
   fOutputFileName = fn;
-  (static_cast<AliStream*>(fInputStreams->At(0)))->ChangeMode("READ");
-  InitOutputGlobal();
+  // InitOutputGlobal();
 }
 
 //_______________________________________________________________________
 Bool_t AliRunDigitizer::InitOutputGlobal()
 {
-// Creates the output file, called by InitEvent()
-
-  TString fn;
-  fn = fOutputDirName + '/' + fOutputFileName;
-  fOutput = new TFile(fn,"update");
-  if (GetDebug()>2) {
-    cerr<<"AliRunDigitizer::InitOutputGlobal(): file "<<fn.Data()<<" was opened"<<endl;
-  }
-  if (fOutput) return kTRUE;
-  Error("InitOutputGlobal","Could not create output file.");
-  return kFALSE;
+  //
+  // Creates the output file, called by InitEvent()
+  // Needs to be called after all inputs are opened  
+  //
+  if (fOutputInitialized) return kTRUE;
+  
+  if ( !fOutputFileName.IsNull())
+   {
+    fOutRunLoader = AliRunLoader::Open(fOutputFileName,fgkDefOutFolderName,"recreate");
+    
+    if (fOutRunLoader == 0x0)
+     {
+       AliError("Can not open output");
+       return kFALSE;
+     }
+    Info("InitOutputGlobal", " 1 %s = ", GetInputFolderName(0).Data()) ; 
+    AliRunLoader* inrl = AliRunLoader::GetRunLoader(GetInputFolderName(0));
+    if (inrl == 0x0)
+     {
+       AliError("Can not get Run Loader Input 0. Maybe yet not initialized?");
+       return kFALSE;
+     }
+    AliDebug(2, Form(" 2 %#x = ", inrl)) ; 
+
+    //Copy all detector loaders from input 0 to output
+    const TObjArray* inloaders = inrl->GetArrayOfLoaders();
+    TIter next(inloaders);
+    AliLoader *loader;
+    while((loader = (AliLoader*)next()))
+     {
+       AliLoader* cloneloader = (AliLoader*)loader->Clone();
+       cloneloader->Register(fOutRunLoader->GetEventFolder());//creates folders for this loader in Output Folder Structure
+       GetOutRunLoader()->AddLoader(cloneloader);//adds a loader for output
+     }
+
+    fOutRunLoader->MakeTree("E");
+    
+    AliDebug(3,Form("file %s was opened.",fOutputFileName.Data()));
+   }
+  fOutputInitialized = kTRUE; 
+  return kTRUE;
 }
-
-
 //_______________________________________________________________________
+
 void AliRunDigitizer::InitEvent()
 {
-// Creates TreeDxx in the output file, called from Digitize() once for 
-//  each event. xx = fEvent
-
-  if (GetDebug()>2) 
-    cerr<<"AliRunDigitizer::InitEvent: fEvent = "<<fEvent<<endl;
-
-// if fOutputFileName was not given, write output to signal file
-  if (fOutputFileName == "") {
-    fOutput = (static_cast<AliStream*>(fInputStreams->At(0)))->CurrentFile();
-  }
-  fOutput->cd();
-  char treeName[30];
-  sprintf(treeName,"TreeD%d",fEvent);
-  fTreeD = static_cast<TTree*>(fOutput->Get(treeName));
-  if (!fTreeD) {
-    fTreeD = new TTree(treeName,"Digits");
-    fTreeD->Write(0,TObject::kOverwrite);
-  }
-
-// tree for ITS fast points
-  sprintf(treeName,"TreeR%d",fEvent);
-  fTreeR = static_cast<TTree*>(fOutput->Get(treeName));
-  if (!fTreeR) {
-    fTreeR = new TTree(treeName,"Reconstruction");
-    fTreeR->Write(0,TObject::kOverwrite);
-  }
-
-// special tree for TPC
-  sprintf(treeName,"%s%d",fTreeDTPCBaseName,fEvent);
-  fTreeDTPC = static_cast<TTree*>(fOutput->Get(treeName));
-  if (!fTreeDTPC) {
-    fTreeDTPC = new TTree(treeName,"TPC_Digits");
-    fTreeDTPC->Write(0,TObject::kOverwrite);
-  }
-
-// special tree for TRD
-  sprintf(treeName,"TreeD%d_TRD",fEvent);
-  fTreeDTRD = static_cast<TTree*>(fOutput->Get(treeName));
-  if (!fTreeDTRD) {
-    fTreeDTRD = new TTree(treeName,"TRD_Digits");
-    fTreeDTRD->Write(0,TObject::kOverwrite);
-  }
-
+  //
+  // redirects output properly
+  //
+  AliDebug(3,Form("fEvent = %d",fEvent));
+  AliDebug(3,Form("fOutputFileName \"%s\"",fOutputFileName.Data()));
+  if (fOutputInitialized == kFALSE) InitOutputGlobal();
+  
+  // if fOutputFileName was not given, write output to signal directory
 }
-
 //_______________________________________________________________________
+
 void AliRunDigitizer::FinishEvent()
 {
-// called at the end of loop over digitizers
-
-  Int_t i;
-  fOutput->cd();
-  if (fCopyTreesFromInput > -1) {
-    char treeName[20];
-    i = fCopyTreesFromInput; 
-    sprintf(treeName,"TreeK%d",fCombination[i]);
-    fInputFiles[i]->Get(treeName)->Clone()->Write();
-    sprintf(treeName,"TreeH%d",fCombination[i]);
-    fInputFiles[i]->Get(treeName)->Clone()->Write();
-  }
+  //
+  // called at the end of loop over digitizers
+  //
+  
+  if (GetOutRunLoader() == 0x0)
+   {
+     AliError("fOutRunLoader is null");
+     return;
+   }
+  
   fEvent++;
   fNrOfEventsWritten++;
-  if (fTreeD) {
-    delete fTreeD;
-    fTreeD = 0;
-  }
-  if (fTreeR) {
-    delete fTreeR;
-    fTreeR = 0;
-  }
-  if (fTreeDTPC) {
-    delete fTreeDTPC;
-    fTreeDTPC = 0;
-  }
-  if (fTreeDTRD) {
-    delete fTreeDTRD;
-    fTreeDTRD = 0;
-  }
+  
+  if (fOutRunLoader)
+  {
+     AliRunLoader* inrl = AliRunLoader::GetRunLoader(GetInputFolderName(0));
+     AliHeader* outheader = fOutRunLoader->GetHeader();
+     AliHeader* inheader = inrl->GetHeader();
+     if (inheader == 0x0)
+     {
+       inrl->LoadHeader();
+       inheader = inrl->GetHeader();
+       if (inheader == 0x0) AliFatal("Can not get header from input 0");
+     }
+     
+     outheader->SetNprimary(inheader->GetNprimary());
+     outheader->SetNtrack(inheader->GetNtrack());
+     outheader->SetEvent(inheader->GetEvent());
+     outheader->SetEventNrInRun(inheader->GetEventNrInRun());
+     outheader->SetNvertex(inheader->GetNvertex());
+     fOutRunLoader->TreeE()->Fill();
+  }
+      
+  if (fCopyTreesFromInput > -1) 
+   {
+    //this is sensless since no information would be coherent in case of merging
+    //
+    AliWarning("Copy trees from input: Copy or link files manually");
+    return;
+   }
 }
-
 //_______________________________________________________________________
+
 void AliRunDigitizer::FinishGlobal()
 {
-// called at the end of Exec
-// save unique objects to the output file
-
-  fOutput->cd();
-  this->Write(0,TObject::kOverwrite);
-  if (fCopyTreesFromInput > -1) {
-    fInputFiles[fCopyTreesFromInput]->Get("TE")->Clone()->Write();
-    gAlice->Write();
-  }
-  fOutput->Write();
+  //
+  // called at the end of Exec
+  // save unique objects to the output file
+  //
+  if (GetOutRunLoader() == 0x0)
+   {
+     AliError("Can not get RunLoader from Output Stream folder");
+     return;
+   }
+  GetOutRunLoader()->CdGAFile();
+  this->Write(NULL, TObject::kOverwrite);
+  if (fOutRunLoader)
+   {
+     fOutRunLoader->WriteHeader("OVERWRITE");
+     fOutRunLoader->WriteRunLoader("OVERWRITE");
+     TFolder* outfolder = fOutRunLoader->GetEventFolder();
+     if (outfolder == 0x0)
+     {
+       AliError("Can not get Event Folder");
+       return;
+     }    
+  
+     AliRunLoader* inRN = AliRunLoader::GetRunLoader(GetInputFolderName(0));
+     outfolder->Add(inRN->GetAliRun());
+     fOutRunLoader->WriteAliRun("OVERWRITE");
+   }
+   
+  if (fCopyTreesFromInput > -1) 
+   {
+     //copy files manually
+   }
 }
-
-
 //_______________________________________________________________________
+
 Int_t  AliRunDigitizer::GetNParticles(Int_t event) const
 {
 // return number of particles in all input files for a given
@@ -501,9 +504,9 @@ Int_t  AliRunDigitizer::GetNParticles(Int_t event) const
   }
   return sum;
 }
-
 //_______________________________________________________________________
-Int_t  AliRunDigitizer::GetNParticles(Int_t /* event */, Int_t /* input */) const
+
+Int_t  AliRunDigitizer::GetNParticles(Int_t /*event*/, Int_t /*input*/) const
 {
 // return number of particles in input file input for a given
 // event (as numbered in this input file)
@@ -513,32 +516,6 @@ Int_t  AliRunDigitizer::GetNParticles(Int_t /* event */, Int_t /* input */) cons
 
   return -1;
 
-/*
-  TFile *file = ConnectInputFile(input);
-  if (!file) {
-    Error("GetNParticles","Cannot open input file");
-    return -1;
-  }
-
-// find the header and get Nprimaries and Nsecondaries
-  TTree* tE = (TTree *)file->Get("TE") ;
-  if (!tE) {
-    Error("GetNParticles","input file does not contain TE");
-    return -1;
-  }
-  AliHeader* header;
-  header = 0;
-  tE->SetBranchAddress("Header", &header);
-  if (!tE->GetEntry(event)) {
-    Error("GetNParticles","event %d not found",event);
-    return -1;
-  }
-  if (GetDebug()>2) {
-    cerr<<"Nprimary: "<< header->GetNprimary()<<endl;
-    cerr<<"Nsecondary: "<<header->GetNsecondary()<<endl;
-  }
-  return header->GetNprimary() + header->GetNsecondary();
-*/
 }
 
 //_______________________________________________________________________
@@ -548,15 +525,14 @@ Int_t* AliRunDigitizer::GetInputEventNumbers(Int_t event) const
 // merged in the output event event
 
 // simplified for now, implement later
-  Int_t * a = new Int_t[kMaxStreamsToMerge];
+  Int_t * a = new Int_t[MAXSTREAMSTOMERGE];
   for (Int_t i = 0; i < fNinputs; i++) {
     a[i] = event;
   }
   return a;
 }
-
 //_______________________________________________________________________
-Int_t AliRunDigitizer::GetInputEventNumber(Int_t event, Int_t /* input */) const
+Int_t AliRunDigitizer::GetInputEventNumber(Int_t event, Int_t /*input*/) const
 {
 // return an event number of an eventInput from input file input
 // which was merged to create output event event
@@ -564,7 +540,6 @@ Int_t AliRunDigitizer::GetInputEventNumber(Int_t event, Int_t /* input */) const
 // simplified for now, implement later
   return event;
 }
-
 //_______________________________________________________________________
 TParticle* AliRunDigitizer::GetParticle(Int_t i, Int_t event) const
 {
@@ -576,8 +551,7 @@ TParticle* AliRunDigitizer::GetParticle(Int_t i, Int_t event) const
 }
 
 //_______________________________________________________________________
-TParticle* AliRunDigitizer::GetParticle(Int_t /* i */, Int_t /* input */, 
-                                        Int_t /* event */) const
+TParticle* AliRunDigitizer::GetParticle(Int_t /*i*/, Int_t /*input*/, Int_t /*event*/) const
 {
 // return pointer to particle with index i in the input file input
 // (index without mask)
@@ -587,60 +561,14 @@ TParticle* AliRunDigitizer::GetParticle(Int_t /* i */, Int_t /* input */,
 // Must be revised in the version with AliStream
 
   return 0;
-/*
-  TFile *file = ConnectInputFile(input);
-  if (!file) {
-    Error("GetParticle","Cannot open input file");
-    return 0;
-  }
-
-// find the header and get Nprimaries and Nsecondaries
-  TTree* tE = (TTree *)file->Get("TE") ;
-  if (!tE) {
-    Error("GetParticle","input file does not contain TE");
-    return 0;
-  }
-  AliHeader* header;
-  header = 0;
-  tE->SetBranchAddress("Header", &header);
-  if (!tE->GetEntry(event)) {
-    Error("GetParticle","event %d not found",event);
-    return 0;
-  }
-  
-// connect TreeK  
-  char treeName[30];
-  sprintf(treeName,"TreeK%d",event);  
-  TTree* tK = static_cast<TTree*>(file->Get(treeName));
-  if (!tK) {
-    Error("GetParticle","input file does not contain TreeK%d",event);
-    return 0;
-  }
-  TParticle *particleBuffer;
-  particleBuffer = 0;
-  tK->SetBranchAddress("Particles", &particleBuffer);
-
-
-// algorithmic way of getting entry index
-// (primary particles are filled after secondaries)
-  Int_t entry;
-  if (i<header->GetNprimary())
-    entry = i+header->GetNsecondary();
-  else 
-    entry = i-header->GetNprimary();
-  Int_t bytesRead = tK->GetEntry(entry);
-//  new ((*fParticles)[nentries]) TParticle(*fParticleBuffer);
-  if (bytesRead)
-    return particleBuffer;
-  return  0;
-*/
 }
 
 //_______________________________________________________________________
 void AliRunDigitizer::ExecuteTask(Option_t* option)
 {
-// overwrite ExecuteTask to do Digitize only
-
+  //
+  // overwrite ExecuteTask to do Digitize only
+  //
   if (!IsActive()) return;
   Digitize(option);
   fHasExecuted = kTRUE;
@@ -648,7 +576,45 @@ void AliRunDigitizer::ExecuteTask(Option_t* option)
 }
 
 //_______________________________________________________________________
-TString AliRunDigitizer::GetInputFileName(const Int_t input, const Int_t order) const 
+const TString& AliRunDigitizer::GetInputFolderName(Int_t i) const
+{
+  //
+  // Get the input Folder Name
+  //
+  AliStream* stream = dynamic_cast<AliStream*>(fInputStreams->At(i));
+  if (stream == 0x0)
+    AliFatal(Form("Can not get the input stream. Index = %d. Exiting",i));
+  return stream->GetFolderName();
+}
+//_______________________________________________________________________
+
+const char* AliRunDigitizer::GetOutputFolderName()
+{
+  //
+  // Get output folder name
+  //
+  return GetOutRunLoader()->GetEventFolder()->GetName();
+}
+//_______________________________________________________________________
+
+AliRunLoader* AliRunDigitizer::GetOutRunLoader()
+{
+  //
+  // Returns Run Loader
+  //
+  if (fOutRunLoader) return fOutRunLoader;
+  
+  if ( fOutputFileName.IsNull() )
+   {//guard that sombody calls it without settting file name
+    AliDebug(1,"Output file name is empty. Using Input 0 for output");
+    return AliRunLoader::GetRunLoader(GetInputFolderName(0));
+   }
+//  InitOutputGlobal();
+  return fOutRunLoader;
+}
+//_______________________________________________________________________
+
+TString AliRunDigitizer::GetInputFileName(Int_t input, Int_t order) const 
 {
 // returns file name of the order-th file in the input stream input
 // returns empty string if such file does not exist