ANALYSIS/AliAnalysisTaskSE.cxx

   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 #include <TROOT.h>
  19 #include <TSystem.h>
  20 #include <TInterpreter.h>
  21 #include <TChain.h>
  22 #include <TFile.h>
  23 #include <TList.h>
  24
  25 #include "AliAnalysisTaskSE.h"
  26 #include "AliAnalysisManager.h"
  27 #include "AliAnalysisCuts.h"
  28 #include "AliAnalysisDataSlot.h"
  29
  30 #include "AliESDEvent.h"
  31 #include "AliESDfriend.h"
  32 #include "AliESD.h"
  33 #include "AliAODEvent.h"
  34 #include "AliAODHeader.h"
  35 #include "AliAODTracklets.h"
  36 #include "AliAODCaloCells.h"
  37 #include "AliAODMCParticle.h"
  38 #include "AliVEvent.h"
  39 #include "AliAODHandler.h"
  40 #include "AliAODInputHandler.h"
  41 #include "AliMCEventHandler.h"
  42 #include "AliInputEventHandler.h"
  43 #include "AliMultiInputEventHandler.h"
  44 #include "AliESDInputHandler.h"
  45 #include "AliMCEvent.h"
  46 #include "AliStack.h"
  47 #include "AliLog.h"
  48 #include "AliAODDimuon.h"
  49
  50
  51 ClassImp(AliAnalysisTaskSE)
  52
  53 ////////////////////////////////////////////////////////////////////////
  54 AliAODHeader*    AliAnalysisTaskSE::fgAODHeader         = NULL;
  55 TClonesArray*    AliAnalysisTaskSE::fgAODTracks         = NULL;
  56 TClonesArray*    AliAnalysisTaskSE::fgAODVertices       = NULL;
  57 TClonesArray*    AliAnalysisTaskSE::fgAODV0s            = NULL;
  58 TClonesArray*    AliAnalysisTaskSE::fgAODPMDClusters    = NULL;
  59 TClonesArray*    AliAnalysisTaskSE::fgAODJets           = NULL;
  60 TClonesArray*    AliAnalysisTaskSE::fgAODFMDClusters    = NULL;
  61 TClonesArray*    AliAnalysisTaskSE::fgAODCaloClusters   = NULL;
  62 TClonesArray*    AliAnalysisTaskSE::fgAODMCParticles    = NULL;
  63 AliAODTracklets* AliAnalysisTaskSE::fgAODTracklets      = NULL;
  64 AliAODCaloCells* AliAnalysisTaskSE::fgAODEmcalCells     = NULL;
  65 AliAODCaloCells* AliAnalysisTaskSE::fgAODPhosCells      = NULL;
  66 TClonesArray*    AliAnalysisTaskSE::fgAODDimuons        = NULL;
  67
  68 AliAnalysisTaskSE::AliAnalysisTaskSE():
  69     AliAnalysisTask(),
  70     fDebug(0),
  71     fEntry(0),
  72     fInputEvent(0x0),
  73     fESDfriend(0x0),
  74     fInputHandler(0x0),
  75     fOutputAOD(0x0),
  76     fMCEvent(0x0),
  77     fTreeA(0x0),
  78     fCurrentRunNumber(-1),
  79     fHistosQA(0x0),
  80     fOfflineTriggerMask(0),
  81     fMultiInputHandler(0),
  82     fMCEventHandler(0)
  83 {
  84   // Default constructor
  85 }
  86
  87 AliAnalysisTaskSE::AliAnalysisTaskSE(const char* name):
  88     AliAnalysisTask(name, "AnalysisTaskSE"),
  89     fDebug(0),
  90     fEntry(0),
  91     fInputEvent(0x0),
  92     fESDfriend(0x0),
  93     fInputHandler(0x0),
  94     fOutputAOD(0x0),
  95     fMCEvent(0x0),
  96     fTreeA(0x0),
  97     fCurrentRunNumber(-1),
  98     fHistosQA(0x0),
  99     fOfflineTriggerMask(0),
 100     fMultiInputHandler(0),
 101     fMCEventHandler(0)
 102 {
 103   // Default constructor
 104     DefineInput (0, TChain::Class());
 105     DefineOutput(0,  TTree::Class());
 106 }
 107
 108 AliAnalysisTaskSE::AliAnalysisTaskSE(const AliAnalysisTaskSE& obj):
 109     AliAnalysisTask(obj),
 110     fDebug(0),
 111     fEntry(0),
 112     fInputEvent(0x0),
 113     fESDfriend(0x0),
 114     fInputHandler(0x0),
 115     fOutputAOD(0x0),
 116     fMCEvent(0x0),
 117     fTreeA(0x0),
 118     fCurrentRunNumber(-1),
 119     fHistosQA(0x0),
 120     fOfflineTriggerMask(0),
 121     fMultiInputHandler(obj.fMultiInputHandler),
 122     fMCEventHandler(obj.fMCEventHandler)
 123 {
 124 // Copy constructor
 125     fDebug            = obj.fDebug;
 126     fEntry            = obj.fEntry;
 127     fInputEvent       = obj.fInputEvent;
 128     fESDfriend        = obj.fESDfriend;
 129     fInputHandler     = obj.fInputHandler;
 130     fOutputAOD        = obj.fOutputAOD;
 131     fMCEvent          = obj.fMCEvent;
 132     fTreeA            = obj.fTreeA;
 133     fCurrentRunNumber = obj.fCurrentRunNumber;
 134     fHistosQA         = obj.fHistosQA;
 135
 136 }
 137
 138
 139 AliAnalysisTaskSE& AliAnalysisTaskSE::operator=(const AliAnalysisTaskSE& other)
 140 {
 141 // Assignment
 142     AliAnalysisTask::operator=(other);
 143     fDebug            = other.fDebug;
 144     fEntry            = other.fEntry;
 145     fInputEvent       = other.fInputEvent;
 146     fESDfriend        = other.fESDfriend;
 147     fInputHandler     = other.fInputHandler;
 148     fOutputAOD        = other.fOutputAOD;
 149     fMCEvent          = other.fMCEvent;
 150     fTreeA            = other.fTreeA;
 151     fCurrentRunNumber = other.fCurrentRunNumber;
 152     fHistosQA         = other.fHistosQA;
 153     fOfflineTriggerMask = other.fOfflineTriggerMask;
 154     fMultiInputHandler  = other.fMultiInputHandler;
 155     fMCEventHandler     = other.fMCEventHandler;
 156     return *this;
 157 }
 158
 159
 160 void AliAnalysisTaskSE::ConnectInputData(Option_t* /*option*/)
 161 {
 162 // Connect the input data
 163     if (fDebug > 1) printf("AnalysisTaskSE::ConnectInputData() \n");
 164
 165    // Connect input handlers (multi input handler is handled)
 166    ConnectMultiHandler();
 167
 168     if (fInputHandler) {
 169         if ((fInputHandler->GetTree())->GetBranch("ESDfriend."))
 170             fESDfriend = ((AliESDInputHandler*)fInputHandler)->GetESDfriend();
 171
 172         fInputEvent = fInputHandler->GetEvent();
 173     } else if( fMCEvent ) {
 174          AliWarning("No Input Event Handler connected, only MC Truth Event Handler") ;
 175     } else {
 176          AliError("No Input Event Handler connected") ;
 177          return ;
 178     }
 179     // Disconnect multi handler
 180     DisconnectMultiHandler();
 181 }
 182
 183 void AliAnalysisTaskSE::CreateOutputObjects()
 184 {
 185 // Create the output container
 186 //
 187 //  Default AOD
 188     if (fDebug > 1) printf("AnalysisTaskSE::CreateOutPutData() \n");
 189
 190     AliAODHandler* handler = dynamic_cast<AliAODHandler*>
 191          ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
 192
 193     Bool_t merging = kFALSE;
 194     AliAODInputHandler* aodIH = static_cast<AliAODInputHandler*>((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
 195     if (aodIH) {
 196         if (aodIH->GetMergeEvents()) merging = kTRUE;
 197     }
 198
 199
 200     // Check if AOD replication has been required
 201
 202     if (handler) {
 203         fOutputAOD   = handler->GetAOD();
 204         fTreeA = handler->GetTree();
 205         if (fOutputAOD && !(handler->IsStandard())) {
 206             if ((handler->NeedsHeaderReplication()) && !(fgAODHeader))
 207                 {
 208                  if (fDebug > 1) AliInfo("Replicating header");
 209                  fgAODHeader = new AliAODHeader;
 210                  handler->AddBranch("AliAODHeader", &fgAODHeader);
 211                 }
 212             if ((handler->NeedsTracksBranchReplication() || merging) && !(fgAODTracks))
 213             {
 214                 if (fDebug > 1) AliInfo("Replicating track branch\n");
 215                 fgAODTracks = new TClonesArray("AliAODTrack",500);
 216                 fgAODTracks->SetName("tracks");
 217                 handler->AddBranch("TClonesArray", &fgAODTracks);
 218             }
 219             if ((handler->NeedsVerticesBranchReplication() || merging) && !(fgAODVertices))
 220             {
 221                 if (fDebug > 1) AliInfo("Replicating vertices branch\n");
 222                 fgAODVertices = new TClonesArray("AliAODVertex",500);
 223                 fgAODVertices->SetName("vertices");
 224                 handler->AddBranch("TClonesArray", &fgAODVertices);
 225             }
 226             if ((handler->NeedsV0sBranchReplication()) && !(fgAODV0s))
 227             {
 228                 if (fDebug > 1) AliInfo("Replicating V0s branch\n");
 229                 fgAODV0s = new TClonesArray("AliAODv0",500);
 230                 fgAODV0s->SetName("v0s");
 231                 handler->AddBranch("TClonesArray", &fgAODV0s);
 232             }
 233             if ((handler->NeedsTrackletsBranchReplication()) && !(fgAODTracklets))
 234             {
 235                 if (fDebug > 1) AliInfo("Replicating Tracklets branch\n");
 236                 fgAODTracklets = new AliAODTracklets("tracklets","tracklets");
 237                 handler->AddBranch("AliAODTracklets", &fgAODTracklets);
 238             }
 239             if ((handler->NeedsPMDClustersBranchReplication()) && !(fgAODPMDClusters))
 240             {
 241                 if (fDebug > 1) AliInfo("Replicating PMDClusters branch\n");
 242                 fgAODPMDClusters = new TClonesArray("AliAODPmdCluster",500);
 243                 fgAODPMDClusters->SetName("pmdClusters");
 244                 handler->AddBranch("TClonesArray", &fgAODPMDClusters);
 245             }
 246             if ((handler->NeedsJetsBranchReplication() || merging) && !(fgAODJets))
 247             {
 248                 if (fDebug > 1) AliInfo("Replicating Jets branch\n");
 249                 fgAODJets = new TClonesArray("AliAODJet",500);
 250                 fgAODJets->SetName("jets");
 251                 handler->AddBranch("TClonesArray", &fgAODJets);
 252             }
 253             if ((handler->NeedsFMDClustersBranchReplication()) && !(fgAODFMDClusters))
 254             {
 255                 AliInfo("Replicating FMDClusters branch\n");
 256                 fgAODFMDClusters = new TClonesArray("AliAODFmdCluster",500);
 257                 fgAODFMDClusters->SetName("fmdClusters");
 258                 handler->AddBranch("TClonesArray", &fgAODFMDClusters);
 259             }
 260             if ((handler->NeedsCaloClustersBranchReplication() || merging) && !(fgAODCaloClusters))
 261             {
 262                 if (fDebug > 1) AliInfo("Replicating CaloClusters branch\n");
 263                 fgAODCaloClusters = new TClonesArray("AliAODCaloCluster",500);
 264                 fgAODCaloClusters->SetName("caloClusters");
 265                 handler->AddBranch("TClonesArray", &fgAODCaloClusters);
 266
 267                 fgAODEmcalCells = new AliAODCaloCells();
 268                 fgAODEmcalCells->SetName("emcalCells");
 269                 handler->AddBranch("AliAODCaloCells", &fgAODEmcalCells);
 270
 271                 fgAODPhosCells = new AliAODCaloCells();
 272                 fgAODPhosCells->SetName("phosCells");
 273                 handler->AddBranch("AliAODCaloCells", &fgAODPhosCells);
 274             }
 275             if ((handler->NeedsMCParticlesBranchReplication() || merging) && !(fgAODMCParticles))
 276             {
 277                 if (fDebug > 1) AliInfo("Replicating MCParticles branch\n");
 278                 fgAODMCParticles = new TClonesArray("AliAODMCParticle",500);
 279                 fgAODMCParticles->SetName("mcparticles");
 280                 handler->AddBranch("TClonesArray", &fgAODMCParticles);
 281             }
 282             if ((handler->NeedsDimuonsBranchReplication() || merging) && !(fgAODDimuons))
 283             {
 284                 if (fDebug > 1) AliInfo("Replicating dimuon branch\n");
 285                 fgAODDimuons = new TClonesArray("AliAODDimuon",0);
 286                 fgAODDimuons->SetName("dimuons");
 287                 handler->AddBranch("TClonesArray", &fgAODDimuons);
 288             }
 289
 290             // cache the pointerd in the AODEvent
 291             fOutputAOD->GetStdContent();
 292         }
 293     }
 294     UserCreateOutputObjects();
 295 }
 296
 297 void AliAnalysisTaskSE::Exec(Option_t* option)
 298 {
 299 //
 300 // Exec analysis of one event
 301
 302     ConnectMultiHandler();
 303
 304     if ( fDebug >= 10)
 305       printf("Task is active %5d\n", IsActive());
 306
 307     if (fDebug > 1) AliInfo("AliAnalysisTaskSE::Exec() \n");
 308 //
 309     AliAODHandler* handler = dynamic_cast<AliAODHandler*>
 310         ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
 311
 312     AliAODInputHandler* aodH = dynamic_cast<AliAODInputHandler*>(fInputHandler);
 313 //
 314 // Was event selected ? If no event selection mechanism, the event SHOULD be selected (AG)
 315     UInt_t isSelected = AliVEvent::kAny;
 316     if( fInputHandler && fInputHandler->GetEventSelection()) {
 317       // Get the actual offline trigger mask for the event and AND it with the
 318       // requested mask. If no mask requested select by default the event.
 319       if (fOfflineTriggerMask)
 320          isSelected = fOfflineTriggerMask & fInputHandler->IsEventSelected();
 321     }
 322 //  Functionality below moved in the filter tasks (AG)
 323 //    if (handler) handler->SetFillAOD(isSelected);
 324
 325     if( fInputHandler ) {
 326         fEntry = fInputHandler->GetReadEntry();
 327         fESDfriend = ((AliESDInputHandler*)fInputHandler)->GetESDfriend();
 328     }
 329
 330
 331 // Notify the change of run number
 332     if (InputEvent() && (InputEvent()->GetRunNumber() != fCurrentRunNumber)) {
 333         fCurrentRunNumber = InputEvent()->GetRunNumber();
 334         NotifyRun();
 335     }
 336
 337     else if( fMCEvent )
 338        fEntry = fMCEvent->Header()->GetEvent();
 339     if ( !((Entry()-1)%100) && fDebug > 0)
 340          AliInfo(Form("%s ----> Processing event # %lld", CurrentFileName(), Entry()));
 341
 342
 343
 344
 345     if (handler && aodH) {
 346         fMCEvent = aodH->MCEvent();
 347         Bool_t merging = aodH->GetMergeEvents();
 348         AliAODEvent* aod = dynamic_cast<AliAODEvent*>(InputEvent());
 349
 350         if (aod && !(handler->IsStandard()) && !(handler->AODIsReplicated())) {
 351             if ((handler->NeedsHeaderReplication()) && (fgAODHeader))
 352             {
 353               // copy the contents by assigment
 354               *fgAODHeader =  *(aod->GetHeader());
 355             }
 356             if ((handler->NeedsTracksBranchReplication() || merging) && (fgAODTracks))
 357             {
 358                 TClonesArray* tracks = aod->GetTracks();
 359                 new (fgAODTracks) TClonesArray(*tracks);
 360             }
 361             if ((handler->NeedsVerticesBranchReplication() || merging) && (fgAODVertices))
 362             {
 363                 TClonesArray* vertices = aod->GetVertices();
 364                 new (fgAODVertices) TClonesArray(*vertices);
 365             }
 366             if ((handler->NeedsV0sBranchReplication()) && (fgAODV0s))
 367             {
 368                 TClonesArray* v0s = aod->GetV0s();
 369                 new (fgAODV0s) TClonesArray(*v0s);
 370             }
 371             if ((handler->NeedsTrackletsBranchReplication()) && (fgAODTracklets))
 372             {
 373               *fgAODTracklets = *aod->GetTracklets();
 374             }
 375             if ((handler->NeedsPMDClustersBranchReplication()) && (fgAODPMDClusters))
 376             {
 377                 TClonesArray* pmdClusters = aod->GetPmdClusters();
 378                 new (fgAODPMDClusters) TClonesArray(*pmdClusters);
 379             }
 380             if ((handler->NeedsJetsBranchReplication() || merging) && (fgAODJets))
 381             {
 382                 TClonesArray* jets = aod->GetJets();
 383                 new (fgAODJets) TClonesArray(*jets);
 384             }
 385             if ((handler->NeedsFMDClustersBranchReplication()) && (fgAODFMDClusters))
 386             {
 387                 TClonesArray* fmdClusters = aod->GetFmdClusters();
 388                 new (fgAODFMDClusters) TClonesArray(*fmdClusters);
 389             }
 390             if ((handler->NeedsCaloClustersBranchReplication() || merging) && (fgAODCaloClusters))
 391             {
 392                 TClonesArray* caloClusters = aod->GetCaloClusters();
 393                 new (fgAODCaloClusters) TClonesArray(*caloClusters);
 394             }
 395
 396             if ((handler->NeedsMCParticlesBranchReplication() || merging) && (fgAODMCParticles))
 397             {
 398                 TClonesArray* mcParticles = (TClonesArray*) (aod->FindListObject("mcparticles"));
 399                 new (fgAODMCParticles) TClonesArray(*mcParticles);
 400             }
 401
 402             if ((handler->NeedsDimuonsBranchReplication() || merging) && (fgAODDimuons))
 403             {
 404                 fgAODDimuons->Clear();
 405                 TClonesArray& dimuons = *fgAODDimuons;
 406                 TClonesArray& tracksnew = *fgAODTracks;
 407
 408                 Int_t nMuonTrack[100];
 409                 for(Int_t imuon = 0; imuon < 100; imuon++) nMuonTrack[imuon] = 0;
 410                 Int_t nMuons=0;
 411                 for(Int_t ii=0; ii < fgAODTracks->GetEntries(); ii++){
 412                     AliAODTrack *track = (AliAODTrack*) fgAODTracks->At(ii);
 413                     if(track->IsMuonTrack()) {
 414                         nMuonTrack[nMuons]= ii;
 415                         nMuons++;
 416                     }
 417                 }
 418                 Int_t jDimuons=0;
 419                 if(nMuons >= 2){
 420                     for(Int_t i = 0; i < nMuons; i++){
 421                         Int_t index0 = nMuonTrack[i];
 422                         for(Int_t j = i+1; j < nMuons; j++){
 423                             Int_t index1 = nMuonTrack[j];
 424                             tracksnew.At(index0)->ResetBit(kIsReferenced);
 425                             tracksnew.At(index0)->SetUniqueID(0);
 426                             tracksnew.At(index1)->ResetBit(kIsReferenced);
 427                             tracksnew.At(index1)->SetUniqueID(0);
 428                             new(dimuons[jDimuons++]) AliAODDimuon(tracksnew.At(index0),tracksnew.At(index1));
 429                         }
 430                     }
 431                 }
 432             }
 433
 434             // Additional merging if needed
 435             if (merging) {
 436                 // mcParticles
 437                 TClonesArray* mcparticles = (TClonesArray*) ((aodH->GetEventToMerge())->FindListObject("mcparticles"));
 438                 Int_t npart = mcparticles->GetEntries();
 439                 Int_t nc = fgAODMCParticles->GetEntries();
 440                 Int_t nc0 = nc;
 441
 442                 for (Int_t i = 0; i < npart; i++) {
 443                     AliAODMCParticle* particle = (AliAODMCParticle*) mcparticles->At(i);
 444                     new((*fgAODMCParticles)[nc++]) AliAODMCParticle(*particle);
 445                 }
 446
 447                 // tracks
 448                 TClonesArray* tracks = aodH->GetEventToMerge()->GetTracks();
 449                 Int_t ntr = tracks->GetEntries();
 450                 nc  = fgAODTracks->GetEntries();
 451                 for (Int_t i = 0; i < ntr; i++) {
 452                     AliAODTrack*    track = (AliAODTrack*) tracks->At(i);
 453                     AliAODTrack* newtrack = new((*fgAODTracks)[nc++]) AliAODTrack(*track);
 454                     newtrack->SetLabel(newtrack->GetLabel() + nc0);
 455                 }
 456
 457                 for (Int_t i = 0; i < nc; i++)
 458                 {
 459                     AliAODTrack* track = (AliAODTrack*) fgAODTracks->At(i);
 460                     track->ResetBit(kIsReferenced);
 461                     track->SetUniqueID(0);
 462                 }
 463
 464
 465                 // clusters
 466                 TClonesArray* clusters = aodH->GetEventToMerge()->GetCaloClusters();
 467                 Int_t ncl  = clusters->GetEntries();
 468                 nc         =  fgAODCaloClusters->GetEntries();
 469                 for (Int_t i = 0; i < ncl; i++) {
 470                     AliAODCaloCluster*    cluster = (AliAODCaloCluster*) clusters->At(i);
 471                     new((*fgAODCaloClusters)[nc++]) AliAODCaloCluster(*cluster);
 472                 }
 473                 // cells
 474                 AliAODCaloCells* cellsA = aodH->GetEventToMerge()->GetEMCALCells();
 475                 Int_t ncells  = cellsA->GetNumberOfCells();
 476                 nc = fgAODEmcalCells->GetNumberOfCells();
 477
 478                 for (Int_t i  = 0; i < ncells; i++) {
 479                     Int_t cn  = cellsA->GetCellNumber(i);
 480                     Int_t pos = fgAODEmcalCells->GetCellPosition(cn);
 481                     if (pos >= 0) {
 482                         Double_t amp = cellsA->GetAmplitude(i) + fgAODEmcalCells->GetAmplitude(pos);
 483                         fgAODEmcalCells->SetCell(pos, cn, amp);
 484                     } else {
 485                         Double_t amp = cellsA->GetAmplitude(i);
 486                         fgAODEmcalCells->SetCell(nc++, cn, amp);
 487                         fgAODEmcalCells->Sort();
 488                     }
 489                 }
 490
 491
 492             } // merging
 493
 494             handler->SetAODIsReplicated();
 495         }
 496     }
 497
 498 // Call the user analysis
 499     if (!fMCEventHandler) {
 500         if (isSelected)
 501             UserExec(option);
 502     } else {
 503         if (isSelected && (fMCEventHandler->InitOk()))
 504             UserExec(option);
 505     }
 506
 507 // Added protection in case the derived task is not an AOD producer.
 508     AliAnalysisDataSlot *out0 = GetOutputSlot(0);
 509     if (out0 && out0->IsConnected()) PostData(0, fTreeA);
 510
 511     DisconnectMultiHandler();
 512 }
 513
 514 const char* AliAnalysisTaskSE::CurrentFileName()
 515 {
 516 // Returns the current file name
 517     if( fInputHandler )
 518       return fInputHandler->GetTree()->GetCurrentFile()->GetName();
 519     else if( fMCEvent )
 520       return ((AliMCEventHandler*) ((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler()))->TreeK()->GetCurrentFile()->GetName();
 521     else return "";
 522 }
 523
 524 void AliAnalysisTaskSE::AddAODBranch(const char* cname, void* addobj, const char *fname)
 525 {
 526     // Add a new branch to the aod tree
 527     AliAODHandler* handler = dynamic_cast<AliAODHandler*>
 528         ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
 529     if (handler) {
 530         handler->AddBranch(cname, addobj, fname);
 531     }
 532 }
 533
 534 Bool_t AliAnalysisTaskSE::IsStandardAOD() const
 535 {
 536 // Check if the output AOD handler is configured for standard or delta AOD.
 537 // Users should first check that AODEvent() returns non-null.
 538     AliAODHandler* handler = dynamic_cast<AliAODHandler*>
 539          ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
 540     if (!handler) {
 541        Error("IsStandardAOD", "No AOD handler. Please use AODEvent() to check this first");
 542        return kTRUE;
 543     }
 544     return handler->IsStandard();
 545 }
 546
 547 Bool_t AliAnalysisTaskSE::Notify()
 548 {
 549     return (UserNotify());
 550 }
 551
 552 const AliEventTag *AliAnalysisTaskSE::EventTag() const
 553 {
 554 // Returns tag for the current event, if any. The return value should always be checked by the user.
 555    if (!fInputHandler) {
 556       Error("EventTag", "Input handler not yet available. Call this in UserExec");
 557       return NULL;
 558    }
 559    return fInputHandler->GetEventTag();
 560 }
 561
 562 void AliAnalysisTaskSE::LoadBranches() const
 563 {
 564 // Load all branches declared in fBranchNames data member of the parent class.
 565 // Should be called in UserExec.
 566   if (!fInputHandler) {
 567      Error("LoadBranches", "Input handler not available yet. Call this in UserExec");
 568      return;
 569   }
 570   AliAnalysisManager *mgr = AliAnalysisManager::GetAnalysisManager();
 571   if (mgr->GetAutoBranchLoading()) return;
 572   TString taskbranches;
 573   GetBranches(fInputHandler->GetDataType(), taskbranches);
 574   if (taskbranches.IsNull()) return;
 575   TObjArray *arr = taskbranches.Tokenize(",");
 576   TIter next(arr);
 577   TObject *obj;
 578   while ((obj=next())) mgr->LoadBranch(obj->GetName());
 579 }
 580
 581
 582 //_________________________________________________________________________________________________
 583 void AliAnalysisTaskSE::ConnectMultiHandler()
 584 {
 585    //
 586    // Connect MultiHandler
 587    //
 588    fInputHandler = (AliInputEventHandler *)((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
 589    fMultiInputHandler = dynamic_cast<AliMultiInputEventHandler *>(fInputHandler);
 590    if (fMultiInputHandler) {
 591       fInputHandler = dynamic_cast<AliInputEventHandler *>(fMultiInputHandler->GetFirstInputEventHandler());
 592       fMCEventHandler = dynamic_cast<AliMCEventHandler *>(fMultiInputHandler->GetFirstMCEventHandler());
 593    } else {
 594       fMCEventHandler = dynamic_cast<AliMCEventHandler *>((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler());
 595    }
 596    if (fMCEventHandler) fMCEvent = fMCEventHandler->MCEvent();
 597 }
 598
 599 //_________________________________________________________________________________________________
 600 void AliAnalysisTaskSE::DisconnectMultiHandler()
 601 {
 602    //
 603    // Disconnect MultiHandler
 604    //
 605    if (fMultiInputHandler) fInputHandler = fMultiInputHandler;
 606 }