added method for fine tuning of TOF in Monte Carlo simulation

[u/mrichter/AliRoot.git] / ANALYSIS / AliAnalysisTaskSE.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.                  *
 **************************************************************************/

/* $Id$ */
 
#include <TROOT.h>
#include <TSystem.h>
#include <TInterpreter.h>
#include <TChain.h>
#include <TFile.h>
#include <TList.h>

#include "AliAnalysisTaskSE.h"
#include "AliAnalysisManager.h"
#include "AliAnalysisCuts.h"
#include "AliAnalysisDataSlot.h"
#include "AliAnalysisDataContainer.h"

#include "AliESDEvent.h"
#include "AliESDfriend.h"
#include "AliESD.h"
#include "AliAODEvent.h"
#include "AliAODHeader.h"
#include "AliAODTracklets.h"
#include "AliAODCaloCells.h"
#include "AliAODMCParticle.h"
#include "AliVEvent.h"
#include "AliAODHandler.h"
#include "AliAODInputHandler.h"
#include "AliMCEventHandler.h"
#include "AliInputEventHandler.h"
#include "AliMultiInputEventHandler.h"
#include "AliESDInputHandler.h"
#include "AliMCEvent.h"
#include "AliStack.h"
#include "AliLog.h"
#include "AliAODDimuon.h"


ClassImp(AliAnalysisTaskSE)

////////////////////////////////////////////////////////////////////////
AliAODHeader*    AliAnalysisTaskSE::fgAODHeader         = NULL;
TClonesArray*    AliAnalysisTaskSE::fgAODTracks         = NULL;
TClonesArray*    AliAnalysisTaskSE::fgAODVertices       = NULL;
TClonesArray*    AliAnalysisTaskSE::fgAODV0s            = NULL;
TClonesArray*    AliAnalysisTaskSE::fgAODPMDClusters    = NULL;
TClonesArray*    AliAnalysisTaskSE::fgAODJets           = NULL;
TClonesArray*    AliAnalysisTaskSE::fgAODFMDClusters    = NULL;
TClonesArray*    AliAnalysisTaskSE::fgAODCaloClusters   = NULL;
TClonesArray*    AliAnalysisTaskSE::fgAODMCParticles    = NULL;
AliAODTracklets* AliAnalysisTaskSE::fgAODTracklets      = NULL;
AliAODCaloCells* AliAnalysisTaskSE::fgAODEmcalCells     = NULL;
AliAODCaloCells* AliAnalysisTaskSE::fgAODPhosCells      = NULL;
TClonesArray*    AliAnalysisTaskSE::fgAODDimuons        = NULL;

AliAnalysisTaskSE::AliAnalysisTaskSE():
    AliAnalysisTask(),
    fDebug(0),
    fEntry(0),
    fInputEvent(0x0),
    fESDfriend(0x0),
    fInputHandler(0x0),
    fOutputAOD(0x0),
    fMCEvent(0x0),
    fTreeA(0x0),
    fCurrentRunNumber(-1),
    fHistosQA(0x0),
    fOfflineTriggerMask(0),
    fMultiInputHandler(0),
    fMCEventHandler(0)
{
  // Default constructor
}

AliAnalysisTaskSE::AliAnalysisTaskSE(const char* name):
    AliAnalysisTask(name, "AnalysisTaskSE"),
    fDebug(0),
    fEntry(0),
    fInputEvent(0x0),
    fESDfriend(0x0),
    fInputHandler(0x0),
    fOutputAOD(0x0),
    fMCEvent(0x0),
    fTreeA(0x0),
    fCurrentRunNumber(-1),
    fHistosQA(0x0),
    fOfflineTriggerMask(0),
    fMultiInputHandler(0),
    fMCEventHandler(0)
{
  // Default constructor
    DefineInput (0, TChain::Class());
    DefineOutput(0,  TTree::Class());
}

AliAnalysisTaskSE::AliAnalysisTaskSE(const AliAnalysisTaskSE& obj):
    AliAnalysisTask(obj),
    fDebug(0),
    fEntry(0),
    fInputEvent(0x0),
    fESDfriend(0x0),
    fInputHandler(0x0),
    fOutputAOD(0x0),
    fMCEvent(0x0),
    fTreeA(0x0),
    fCurrentRunNumber(-1),
    fHistosQA(0x0),
    fOfflineTriggerMask(0),
    fMultiInputHandler(obj.fMultiInputHandler),
    fMCEventHandler(obj.fMCEventHandler)
{
// Copy constructor
    fDebug            = obj.fDebug;
    fEntry            = obj.fEntry;
    fInputEvent       = obj.fInputEvent;
    fESDfriend        = obj.fESDfriend;
    fInputHandler     = obj.fInputHandler;
    fOutputAOD        = obj.fOutputAOD;
    fMCEvent          = obj.fMCEvent;
    fTreeA            = obj.fTreeA;    
    fCurrentRunNumber = obj.fCurrentRunNumber;
    fHistosQA         = obj.fHistosQA;

}


AliAnalysisTaskSE& AliAnalysisTaskSE::operator=(const AliAnalysisTaskSE& other)
{
// Assignment
    AliAnalysisTask::operator=(other);
    fDebug            = other.fDebug;
    fEntry            = other.fEntry;
    fInputEvent       = other.fInputEvent;
    fESDfriend        = other.fESDfriend;
    fInputHandler     = other.fInputHandler;
    fOutputAOD        = other.fOutputAOD;
    fMCEvent          = other.fMCEvent;
    fTreeA            = other.fTreeA;    
    fCurrentRunNumber = other.fCurrentRunNumber;
    fHistosQA         = other.fHistosQA;
    fOfflineTriggerMask = other.fOfflineTriggerMask;
    fMultiInputHandler  = other.fMultiInputHandler;
    fMCEventHandler     = other.fMCEventHandler;
    return *this;
}

//______________________________________________________________________________
Bool_t AliAnalysisTaskSE::CheckPostData() const
{
// Checks if data was posted to all outputs defined by the task. If task does
// not have output slots this returns always kTRUE.
   AliAnalysisDataContainer *coutput;
   AliAnalysisManager *mgr = AliAnalysisManager::GetAnalysisManager();
   for (Int_t islot=1; islot<fNoutputs; islot++) {
      coutput = GetOutputSlot(islot)->GetContainer();
      if (!mgr->GetOutputs()->FindObject(coutput)) continue;
      if (!coutput->GetData()) return kFALSE;
   }
   CheckOwnership();
   return kTRUE;
}

void AliAnalysisTaskSE::ConnectInputData(Option_t* /*option*/)
{
// Connect the input data
    if (fDebug > 1) printf("AnalysisTaskSE::ConnectInputData() \n");

   // Connect input handlers (multi input handler is handled)
   ConnectMultiHandler();

    if (fInputHandler) {
	if ((fInputHandler->GetTree())->GetBranch("ESDfriend."))
	    fESDfriend = ((AliESDInputHandler*)fInputHandler)->GetESDfriend();

	fInputEvent = fInputHandler->GetEvent();
    } else if( fMCEvent ) {
         AliWarning("No Input Event Handler connected, only MC Truth Event Handler") ; 
    } else {
         AliError("No Input Event Handler connected") ; 
         return ; 
    }
    // Disconnect multi handler
    DisconnectMultiHandler();
}

void AliAnalysisTaskSE::CreateOutputObjects()
{
// Create the output container
//
//  Default AOD
    if (fDebug > 1) printf("AnalysisTaskSE::CreateOutPutData() \n");

    AliAODHandler* handler = dynamic_cast<AliAODHandler*> 
         ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
    
    Bool_t merging = kFALSE;
    AliAODInputHandler* aodIH = static_cast<AliAODInputHandler*>((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
    if (aodIH) {
	if (aodIH->GetMergeEvents()) merging = kTRUE;
    }
    

    // Check if AOD replication has been required
    
    if (handler) {
	fOutputAOD   = handler->GetAOD();
	fTreeA = handler->GetTree();
	if (fOutputAOD && !(handler->IsStandard())) {
	    if ((handler->NeedsHeaderReplication()) && !(fgAODHeader)) 
		{
		 if (fDebug > 1) AliInfo("Replicating header");
		 fgAODHeader = new AliAODHeader;
		 handler->AddBranch("AliAODHeader", &fgAODHeader);
		}
	    if ((handler->NeedsTracksBranchReplication() || merging) && !(fgAODTracks))      
	    {   
		if (fDebug > 1) AliInfo("Replicating track branch\n");
		fgAODTracks = new TClonesArray("AliAODTrack",500);
		fgAODTracks->SetName("tracks");
		handler->AddBranch("TClonesArray", &fgAODTracks);
	    }    
	    if ((handler->NeedsVerticesBranchReplication() || merging) && !(fgAODVertices))
	    {
		if (fDebug > 1) AliInfo("Replicating vertices branch\n");
		fgAODVertices = new TClonesArray("AliAODVertex",500);
		fgAODVertices->SetName("vertices");
		handler->AddBranch("TClonesArray", &fgAODVertices);
	    }	
	    if ((handler->NeedsV0sBranchReplication()) && !(fgAODV0s))	  
	    {   
		if (fDebug > 1) AliInfo("Replicating V0s branch\n");
		fgAODV0s = new TClonesArray("AliAODv0",500);
		fgAODV0s->SetName("v0s");
		handler->AddBranch("TClonesArray", &fgAODV0s);
	    }
	    if ((handler->NeedsTrackletsBranchReplication()) && !(fgAODTracklets))	  
	    {   
		if (fDebug > 1) AliInfo("Replicating Tracklets branch\n");
		fgAODTracklets = new AliAODTracklets("tracklets","tracklets");
		handler->AddBranch("AliAODTracklets", &fgAODTracklets);
	    }
	    if ((handler->NeedsPMDClustersBranchReplication()) && !(fgAODPMDClusters))	  
	    {   
		if (fDebug > 1) AliInfo("Replicating PMDClusters branch\n");
		fgAODPMDClusters = new TClonesArray("AliAODPmdCluster",500);
		fgAODPMDClusters->SetName("pmdClusters");
		handler->AddBranch("TClonesArray", &fgAODPMDClusters);
	    }
	    if ((handler->NeedsJetsBranchReplication() || merging) && !(fgAODJets))	  
	    {   
		if (fDebug > 1) AliInfo("Replicating Jets branch\n");
		fgAODJets = new TClonesArray("AliAODJet",500);
		fgAODJets->SetName("jets");
		handler->AddBranch("TClonesArray", &fgAODJets);
	    }
	    if ((handler->NeedsFMDClustersBranchReplication()) && !(fgAODFMDClusters))	  
	    {   
		AliInfo("Replicating FMDClusters branch\n");
		fgAODFMDClusters = new TClonesArray("AliAODFmdCluster",500);
		fgAODFMDClusters->SetName("fmdClusters");
		handler->AddBranch("TClonesArray", &fgAODFMDClusters);
	    }
	    if ((handler->NeedsCaloClustersBranchReplication() || merging) && !(fgAODCaloClusters))	  
	    {   
		if (fDebug > 1) AliInfo("Replicating CaloClusters branch\n");
		fgAODCaloClusters = new TClonesArray("AliAODCaloCluster",500);
		fgAODCaloClusters->SetName("caloClusters");
		handler->AddBranch("TClonesArray", &fgAODCaloClusters);

		fgAODEmcalCells = new AliAODCaloCells();
		fgAODEmcalCells->SetName("emcalCells");
		handler->AddBranch("AliAODCaloCells", &fgAODEmcalCells);

		fgAODPhosCells = new AliAODCaloCells();
		fgAODPhosCells->SetName("phosCells");
		handler->AddBranch("AliAODCaloCells", &fgAODPhosCells);
	    }
	    if ((handler->NeedsMCParticlesBranchReplication() || merging) && !(fgAODMCParticles))	  
	    {   
		if (fDebug > 1) AliInfo("Replicating MCParticles branch\n");
		fgAODMCParticles = new TClonesArray("AliAODMCParticle",500);
		fgAODMCParticles->SetName("mcparticles");
		handler->AddBranch("TClonesArray", &fgAODMCParticles);
	    }
	    if ((handler->NeedsDimuonsBranchReplication() || merging) && !(fgAODDimuons))      
	    {   
		if (fDebug > 1) AliInfo("Replicating dimuon branch\n");
		fgAODDimuons = new TClonesArray("AliAODDimuon",0);
		fgAODDimuons->SetName("dimuons");
		handler->AddBranch("TClonesArray", &fgAODDimuons);
	    }    

	    // cache the pointerd in the AODEvent
	    fOutputAOD->GetStdContent();
	}
    }
    ConnectMultiHandler();
    UserCreateOutputObjects();
    DisconnectMultiHandler();
}

void AliAnalysisTaskSE::Exec(Option_t* option)
{
//
// Exec analysis of one event

    ConnectMultiHandler();

    if ( fDebug >= 10)
      printf("Task is active %5d\n", IsActive());
    
    if (fDebug > 1) AliInfo("AliAnalysisTaskSE::Exec() \n");
//
    AliAODHandler* handler = dynamic_cast<AliAODHandler*> 
	((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());

    AliAODInputHandler* aodH = dynamic_cast<AliAODInputHandler*>(fInputHandler);
//
// Was event selected ? If no event selection mechanism, the event SHOULD be selected (AG)
    UInt_t isSelected = AliVEvent::kAny;
    if( fInputHandler && fInputHandler->GetEventSelection()) {
      // Get the actual offline trigger mask for the event and AND it with the
      // requested mask. If no mask requested select by default the event.
      if (fOfflineTriggerMask)
         isSelected = fOfflineTriggerMask & fInputHandler->IsEventSelected();
    }
//  Functionality below moved in the filter tasks (AG)
//    if (handler) handler->SetFillAOD(isSelected);

    if( fInputHandler ) {
	fEntry = fInputHandler->GetReadEntry();
	fESDfriend = ((AliESDInputHandler*)fInputHandler)->GetESDfriend();
    }
    

// Notify the change of run number
    if (InputEvent() && (InputEvent()->GetRunNumber() != fCurrentRunNumber)) {
	fCurrentRunNumber = InputEvent()->GetRunNumber();
	NotifyRun();
    }    
	   
    else if( fMCEvent )
       fEntry = fMCEvent->Header()->GetEvent(); 
    if ( !((Entry()-1)%100) && fDebug > 0) 
         AliInfo(Form("%s ----> Processing event # %lld", CurrentFileName(), Entry()));

    
    

    if (handler && aodH) {
	fMCEvent = aodH->MCEvent();
	Bool_t merging = aodH->GetMergeEvents();
	AliAODEvent* aod = dynamic_cast<AliAODEvent*>(InputEvent());

	if (aod && !(handler->IsStandard()) && !(handler->AODIsReplicated())) {
	    if ((handler->NeedsHeaderReplication()) && (fgAODHeader))
	    {
	      // copy the contents by assigment
	      *fgAODHeader =  *(aod->GetHeader());
	    }
	    if ((handler->NeedsTracksBranchReplication() || merging) && (fgAODTracks))
	    {
		TClonesArray* tracks = aod->GetTracks();
		new (fgAODTracks) TClonesArray(*tracks);
	    }
	    if ((handler->NeedsVerticesBranchReplication() || merging) && (fgAODVertices))
	    {
		TClonesArray* vertices = aod->GetVertices();
		new (fgAODVertices) TClonesArray(*vertices);
	    }
	    if ((handler->NeedsV0sBranchReplication()) && (fgAODV0s))
	    {
		TClonesArray* v0s = aod->GetV0s();
		new (fgAODV0s) TClonesArray(*v0s);
	    }
	    if ((handler->NeedsTrackletsBranchReplication()) && (fgAODTracklets))
	    {
	      *fgAODTracklets = *aod->GetTracklets();
	    }
	    if ((handler->NeedsPMDClustersBranchReplication()) && (fgAODPMDClusters))
	    {
		TClonesArray* pmdClusters = aod->GetPmdClusters();
		new (fgAODPMDClusters) TClonesArray(*pmdClusters);
	    }
	    if ((handler->NeedsJetsBranchReplication() || merging) && (fgAODJets))
	    {
		TClonesArray* jets = aod->GetJets();
		new (fgAODJets) TClonesArray(*jets);
	    }
	    if ((handler->NeedsFMDClustersBranchReplication()) && (fgAODFMDClusters))
	    {
		TClonesArray* fmdClusters = aod->GetFmdClusters();
		new (fgAODFMDClusters) TClonesArray(*fmdClusters);
	    }
	    if ((handler->NeedsCaloClustersBranchReplication() || merging) && (fgAODCaloClusters))
	    {
		TClonesArray* caloClusters = aod->GetCaloClusters();
		new (fgAODCaloClusters) TClonesArray(*caloClusters);
	    }

	    if ((handler->NeedsMCParticlesBranchReplication() || merging) && (fgAODMCParticles))
	    {
		TClonesArray* mcParticles = (TClonesArray*) (aod->FindListObject("mcparticles"));
		new (fgAODMCParticles) TClonesArray(*mcParticles);
	    }
	    
	    if ((handler->NeedsDimuonsBranchReplication() || merging) && (fgAODDimuons))
	    {
	        fgAODDimuons->Clear();
		TClonesArray& dimuons = *fgAODDimuons;
		TClonesArray& tracksnew = *fgAODTracks;
		
                Int_t nMuonTrack[100]; 
                for(Int_t imuon = 0; imuon < 100; imuon++) nMuonTrack[imuon] = 0;
                Int_t nMuons=0;
		for(Int_t ii=0; ii < fgAODTracks->GetEntries(); ii++){
		    AliAODTrack *track = (AliAODTrack*) fgAODTracks->At(ii);
		    if(track->IsMuonTrack()) {
			nMuonTrack[nMuons]= ii;
			nMuons++;
		    }  
		}
                Int_t jDimuons=0;
		if(nMuons >= 2){
		    for(Int_t i = 0; i < nMuons; i++){
			Int_t index0 = nMuonTrack[i];
			for(Int_t j = i+1; j < nMuons; j++){
			    Int_t index1 = nMuonTrack[j];
			    tracksnew.At(index0)->ResetBit(kIsReferenced);
			    tracksnew.At(index0)->SetUniqueID(0); 
			    tracksnew.At(index1)->ResetBit(kIsReferenced);
			    tracksnew.At(index1)->SetUniqueID(0);
			    new(dimuons[jDimuons++]) AliAODDimuon(tracksnew.At(index0),tracksnew.At(index1));
			}
		    }    
		}
	    }
	    
	    // Additional merging if needed
	    if (merging) {
		// mcParticles
		TClonesArray* mcparticles = (TClonesArray*) ((aodH->GetEventToMerge())->FindListObject("mcparticles"));
		Int_t npart = mcparticles->GetEntries();
		Int_t nc = fgAODMCParticles->GetEntries();
		Int_t nc0 = nc;
		
		for (Int_t i = 0; i < npart; i++) {
		    AliAODMCParticle* particle = (AliAODMCParticle*) mcparticles->At(i);
		    new((*fgAODMCParticles)[nc++]) AliAODMCParticle(*particle);
		}
		
		// tracks
		TClonesArray* tracks = aodH->GetEventToMerge()->GetTracks();
		Int_t ntr = tracks->GetEntries();
		nc  = fgAODTracks->GetEntries();	
		for (Int_t i = 0; i < ntr; i++) {
		    AliAODTrack*    track = (AliAODTrack*) tracks->At(i);
		    AliAODTrack* newtrack = new((*fgAODTracks)[nc++]) AliAODTrack(*track);
		    newtrack->SetLabel(newtrack->GetLabel() + nc0);
		}

		for (Int_t i = 0; i < nc; i++) 
		{
		    AliAODTrack* track = (AliAODTrack*) fgAODTracks->At(i);
		    track->ResetBit(kIsReferenced);
		    track->SetUniqueID(0);
		}
		
		
		// clusters
		TClonesArray* clusters = aodH->GetEventToMerge()->GetCaloClusters();
		Int_t ncl  = clusters->GetEntries();
		nc         =  fgAODCaloClusters->GetEntries();
		for (Int_t i = 0; i < ncl; i++) {
		    AliAODCaloCluster*    cluster = (AliAODCaloCluster*) clusters->At(i);
		    new((*fgAODCaloClusters)[nc++]) AliAODCaloCluster(*cluster);
		}
		// cells
		AliAODCaloCells* cellsA = aodH->GetEventToMerge()->GetEMCALCells();
		Int_t ncells  = cellsA->GetNumberOfCells();
		nc = fgAODEmcalCells->GetNumberOfCells();
		
		for (Int_t i  = 0; i < ncells; i++) {
		    Int_t cn  = cellsA->GetCellNumber(i);
		    Int_t pos = fgAODEmcalCells->GetCellPosition(cn);
		    if (pos >= 0) {
			Double_t amp = cellsA->GetAmplitude(i) + fgAODEmcalCells->GetAmplitude(pos);
			fgAODEmcalCells->SetCell(pos, cn, amp);
		    } else {
			Double_t amp = cellsA->GetAmplitude(i);
			fgAODEmcalCells->SetCell(nc++, cn, amp);
			fgAODEmcalCells->Sort();
		    }
		}
		
		
	    } // merging
	    
	    handler->SetAODIsReplicated();
	}
    }

// Call the user analysis    
    if (!fMCEventHandler) {
	if (isSelected) 
	    UserExec(option);
    } else {
	if (isSelected && (fMCEventHandler->InitOk())) 
	    UserExec(option);
    }
    
// Added protection in case the derived task is not an AOD producer.
    AliAnalysisDataSlot *out0 = GetOutputSlot(0);
    if (out0 && out0->IsConnected()) PostData(0, fTreeA);    
    
    DisconnectMultiHandler();
}

const char* AliAnalysisTaskSE::CurrentFileName()
{
// Returns the current file name    
    if( fInputHandler )
      return fInputHandler->GetTree()->GetCurrentFile()->GetName();
    else if( fMCEvent )
      return ((AliMCEventHandler*) ((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler()))->TreeK()->GetCurrentFile()->GetName();
    else return "";
}

void AliAnalysisTaskSE::AddAODBranch(const char* cname, void* addobj, const char *fname)
{
    // Add a new branch to the aod tree
    AliAODHandler* handler = dynamic_cast<AliAODHandler*> 
	((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
    if (handler) {
	handler->AddBranch(cname, addobj, fname);
    }
}

Bool_t AliAnalysisTaskSE::IsStandardAOD() const
{
// Check if the output AOD handler is configured for standard or delta AOD.
// Users should first check that AODEvent() returns non-null.
    AliAODHandler* handler = dynamic_cast<AliAODHandler*> 
         ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
    if (!handler) {
       Error("IsStandardAOD", "No AOD handler. Please use AODEvent() to check this first");
       return kTRUE;
    }
    return handler->IsStandard();   
}

Bool_t AliAnalysisTaskSE::Notify()
{
    return (UserNotify());
}

const AliEventTag *AliAnalysisTaskSE::EventTag() const
{
// Returns tag for the current event, if any. The return value should always be checked by the user.
   if (!fInputHandler) {
      Error("EventTag", "Input handler not yet available. Call this in UserExec");
      return NULL;
   }
   return fInputHandler->GetEventTag();
}

void AliAnalysisTaskSE::LoadBranches() const
{
// Load all branches declared in fBranchNames data member of the parent class.
// Should be called in UserExec.
  if (!fInputHandler) {
     Error("LoadBranches", "Input handler not available yet. Call this in UserExec");
     return;
  }
  AliAnalysisManager *mgr = AliAnalysisManager::GetAnalysisManager();
  if (mgr->GetAutoBranchLoading()) return;
  TString taskbranches;
  GetBranches(fInputHandler->GetDataType(), taskbranches);
  if (taskbranches.IsNull()) return;
  TObjArray *arr = taskbranches.Tokenize(",");
  TIter next(arr);
  TObject *obj;
  while ((obj=next())) mgr->LoadBranch(obj->GetName());
}


//_________________________________________________________________________________________________
void AliAnalysisTaskSE::ConnectMultiHandler()
{
   //
   // Connect MultiHandler
   //
   fInputHandler = (AliInputEventHandler *)((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
   fMultiInputHandler = dynamic_cast<AliMultiInputEventHandler *>(fInputHandler);
   if (fMultiInputHandler) {
      fInputHandler = dynamic_cast<AliInputEventHandler *>(fMultiInputHandler->GetFirstInputEventHandler());
      fMCEventHandler = dynamic_cast<AliMCEventHandler *>(fMultiInputHandler->GetFirstMCEventHandler());
   } else { 
      fMCEventHandler = dynamic_cast<AliMCEventHandler *>((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler());
   }
   if (fMCEventHandler) fMCEvent = fMCEventHandler->MCEvent();
}

//_________________________________________________________________________________________________
void AliAnalysisTaskSE::DisconnectMultiHandler()
{
   //
   // Disconnect MultiHandler
   //
   if (fMultiInputHandler) fInputHandler = fMultiInputHandler;
}