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 #include "AliAnalysisDataContainer.h"
  30
  31 #include "AliESDEvent.h"
  32 #include "AliESDfriend.h"
  33 #include "AliESD.h"
  34 #include "AliAODEvent.h"
  35 #include "AliAODHeader.h"
  36 #include "AliAODTracklets.h"
  37 #include "AliAODCaloCells.h"
  38 #include "AliAODMCParticle.h"
  39 #include "AliVEvent.h"
  40 #include "AliAODHandler.h"
  41 #include "AliAODInputHandler.h"
  42 #include "AliMCEventHandler.h"
  43 #include "AliInputEventHandler.h"
  44 #include "AliMultiInputEventHandler.h"
  45 #include "AliESDInputHandler.h"
  46 #include "AliMCEvent.h"
  47 #include "AliStack.h"
  48 #include "AliLog.h"
  49 #include "AliAODDimuon.h"
  50
  51
  52 ClassImp(AliAnalysisTaskSE)
  53
  54 ////////////////////////////////////////////////////////////////////////
  55 AliAODHeader*    AliAnalysisTaskSE::fgAODHeader         = NULL;
  56 TClonesArray*    AliAnalysisTaskSE::fgAODTracks         = NULL;
  57 TClonesArray*    AliAnalysisTaskSE::fgAODVertices       = NULL;
  58 TClonesArray*    AliAnalysisTaskSE::fgAODV0s            = NULL;
  59 TClonesArray*    AliAnalysisTaskSE::fgAODPMDClusters    = NULL;
  60 TClonesArray*    AliAnalysisTaskSE::fgAODJets           = NULL;
  61 TClonesArray*    AliAnalysisTaskSE::fgAODFMDClusters    = NULL;
  62 TClonesArray*    AliAnalysisTaskSE::fgAODCaloClusters   = NULL;
  63 TClonesArray*    AliAnalysisTaskSE::fgAODMCParticles    = NULL;
  64 AliAODTracklets* AliAnalysisTaskSE::fgAODTracklets      = NULL;
  65 AliAODCaloCells* AliAnalysisTaskSE::fgAODEmcalCells     = NULL;
  66 AliAODCaloCells* AliAnalysisTaskSE::fgAODPhosCells      = NULL;
  67 TClonesArray*    AliAnalysisTaskSE::fgAODDimuons        = NULL;
  68
  69 AliAnalysisTaskSE::AliAnalysisTaskSE():
  70     AliAnalysisTask(),
  71     fDebug(0),
  72     fEntry(0),
  73     fInputEvent(0x0),
  74     fESDfriend(0x0),
  75     fInputHandler(0x0),
  76     fOutputAOD(0x0),
  77     fMCEvent(0x0),
  78     fTreeA(0x0),
  79     fCurrentRunNumber(-1),
  80     fHistosQA(0x0),
  81     fOfflineTriggerMask(0),
  82     fMultiInputHandler(0),
  83     fMCEventHandler(0)
  84 {
  85   // Default constructor
  86 }
  87
  88 AliAnalysisTaskSE::AliAnalysisTaskSE(const char* name):
  89     AliAnalysisTask(name, "AnalysisTaskSE"),
  90     fDebug(0),
  91     fEntry(0),
  92     fInputEvent(0x0),
  93     fESDfriend(0x0),
  94     fInputHandler(0x0),
  95     fOutputAOD(0x0),
  96     fMCEvent(0x0),
  97     fTreeA(0x0),
  98     fCurrentRunNumber(-1),
  99     fHistosQA(0x0),
 100     fOfflineTriggerMask(0),
 101     fMultiInputHandler(0),
 102     fMCEventHandler(0)
 103 {
 104   // Default constructor
 105     DefineInput (0, TChain::Class());
 106     DefineOutput(0,  TTree::Class());
 107 }
 108
 109 AliAnalysisTaskSE::AliAnalysisTaskSE(const AliAnalysisTaskSE& obj):
 110     AliAnalysisTask(obj),
 111     fDebug(0),
 112     fEntry(0),
 113     fInputEvent(0x0),
 114     fESDfriend(0x0),
 115     fInputHandler(0x0),
 116     fOutputAOD(0x0),
 117     fMCEvent(0x0),
 118     fTreeA(0x0),
 119     fCurrentRunNumber(-1),
 120     fHistosQA(0x0),
 121     fOfflineTriggerMask(0),
 122     fMultiInputHandler(obj.fMultiInputHandler),
 123     fMCEventHandler(obj.fMCEventHandler)
 124 {
 125 // Copy constructor
 126     fDebug            = obj.fDebug;
 127     fEntry            = obj.fEntry;
 128     fInputEvent       = obj.fInputEvent;
 129     fESDfriend        = obj.fESDfriend;
 130     fInputHandler     = obj.fInputHandler;
 131     fOutputAOD        = obj.fOutputAOD;
 132     fMCEvent          = obj.fMCEvent;
 133     fTreeA            = obj.fTreeA;
 134     fCurrentRunNumber = obj.fCurrentRunNumber;
 135     fHistosQA         = obj.fHistosQA;
 136
 137 }
 138
 139
 140 AliAnalysisTaskSE& AliAnalysisTaskSE::operator=(const AliAnalysisTaskSE& other)
 141 {
 142 // Assignment
 143     AliAnalysisTask::operator=(other);
 144     fDebug            = other.fDebug;
 145     fEntry            = other.fEntry;
 146     fInputEvent       = other.fInputEvent;
 147     fESDfriend        = other.fESDfriend;
 148     fInputHandler     = other.fInputHandler;
 149     fOutputAOD        = other.fOutputAOD;
 150     fMCEvent          = other.fMCEvent;
 151     fTreeA            = other.fTreeA;
 152     fCurrentRunNumber = other.fCurrentRunNumber;
 153     fHistosQA         = other.fHistosQA;
 154     fOfflineTriggerMask = other.fOfflineTriggerMask;
 155     fMultiInputHandler  = other.fMultiInputHandler;
 156     fMCEventHandler     = other.fMCEventHandler;
 157     return *this;
 158 }
 159
 160 //______________________________________________________________________________
 161 Bool_t AliAnalysisTaskSE::CheckPostData() const
 162 {
 163 // Checks if data was posted to all outputs defined by the task. If task does
 164 // not have output slots this returns always kTRUE.
 165    AliAnalysisDataContainer *coutput;
 166    AliAnalysisManager *mgr = AliAnalysisManager::GetAnalysisManager();
 167    for (Int_t islot=1; islot<fNoutputs; islot++) {
 168       coutput = GetOutputSlot(islot)->GetContainer();
 169       if (!mgr->GetOutputs()->FindObject(coutput)) continue;
 170       if (!coutput->GetData()) return kFALSE;
 171    }
 172    CheckOwnership();
 173    return kTRUE;
 174 }
 175
 176 void AliAnalysisTaskSE::ConnectInputData(Option_t* /*option*/)
 177 {
 178 // Connect the input data
 179     if (fDebug > 1) printf("AnalysisTaskSE::ConnectInputData() \n");
 180
 181    // Connect input handlers (multi input handler is handled)
 182    ConnectMultiHandler();
 183
 184     if (fInputHandler) {
 185         if ((fInputHandler->GetTree())->GetBranch("ESDfriend."))
 186             fESDfriend = ((AliESDInputHandler*)fInputHandler)->GetESDfriend();
 187
 188         fInputEvent = fInputHandler->GetEvent();
 189     } else if( fMCEvent ) {
 190          AliWarning("No Input Event Handler connected, only MC Truth Event Handler") ;
 191     } else {
 192          AliError("No Input Event Handler connected") ;
 193          return ;
 194     }
 195     // Disconnect multi handler
 196     DisconnectMultiHandler();
 197 }
 198
 199 void AliAnalysisTaskSE::CreateOutputObjects()
 200 {
 201 // Create the output container
 202 //
 203 //  Default AOD
 204     if (fDebug > 1) printf("AnalysisTaskSE::CreateOutPutData() \n");
 205
 206     AliAODHandler* handler = dynamic_cast<AliAODHandler*>
 207          ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
 208
 209     Bool_t merging = kFALSE;
 210     AliAODInputHandler* aodIH = static_cast<AliAODInputHandler*>((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
 211     if (aodIH) {
 212         if (aodIH->GetMergeEvents()) merging = kTRUE;
 213     }
 214
 215
 216     // Check if AOD replication has been required
 217
 218     if (handler) {
 219         fOutputAOD   = handler->GetAOD();
 220         fTreeA = handler->GetTree();
 221         if (fOutputAOD && !(handler->IsStandard())) {
 222             if ((handler->NeedsHeaderReplication()) && !(fgAODHeader))
 223                 {
 224                  if (fDebug > 1) AliInfo("Replicating header");
 225                  fgAODHeader = new AliAODHeader;
 226                  handler->AddBranch("AliAODHeader", &fgAODHeader);
 227                 }
 228             if ((handler->NeedsTracksBranchReplication() || merging) && !(fgAODTracks))
 229             {
 230                 if (fDebug > 1) AliInfo("Replicating track branch\n");
 231                 fgAODTracks = new TClonesArray("AliAODTrack",500);
 232                 fgAODTracks->SetName("tracks");
 233                 handler->AddBranch("TClonesArray", &fgAODTracks);
 234             }
 235             if ((handler->NeedsVerticesBranchReplication() || merging) && !(fgAODVertices))
 236             {
 237                 if (fDebug > 1) AliInfo("Replicating vertices branch\n");
 238                 fgAODVertices = new TClonesArray("AliAODVertex",500);
 239                 fgAODVertices->SetName("vertices");
 240                 handler->AddBranch("TClonesArray", &fgAODVertices);
 241             }
 242             if ((handler->NeedsV0sBranchReplication()) && !(fgAODV0s))
 243             {
 244                 if (fDebug > 1) AliInfo("Replicating V0s branch\n");
 245                 fgAODV0s = new TClonesArray("AliAODv0",500);
 246                 fgAODV0s->SetName("v0s");
 247                 handler->AddBranch("TClonesArray", &fgAODV0s);
 248             }
 249             if ((handler->NeedsTrackletsBranchReplication()) && !(fgAODTracklets))
 250             {
 251                 if (fDebug > 1) AliInfo("Replicating Tracklets branch\n");
 252                 fgAODTracklets = new AliAODTracklets("tracklets","tracklets");
 253                 handler->AddBranch("AliAODTracklets", &fgAODTracklets);
 254             }
 255             if ((handler->NeedsPMDClustersBranchReplication()) && !(fgAODPMDClusters))
 256             {
 257                 if (fDebug > 1) AliInfo("Replicating PMDClusters branch\n");
 258                 fgAODPMDClusters = new TClonesArray("AliAODPmdCluster",500);
 259                 fgAODPMDClusters->SetName("pmdClusters");
 260                 handler->AddBranch("TClonesArray", &fgAODPMDClusters);
 261             }
 262             if ((handler->NeedsJetsBranchReplication() || merging) && !(fgAODJets))
 263             {
 264                 if (fDebug > 1) AliInfo("Replicating Jets branch\n");
 265                 fgAODJets = new TClonesArray("AliAODJet",500);
 266                 fgAODJets->SetName("jets");
 267                 handler->AddBranch("TClonesArray", &fgAODJets);
 268             }
 269             if ((handler->NeedsFMDClustersBranchReplication()) && !(fgAODFMDClusters))
 270             {
 271                 AliInfo("Replicating FMDClusters branch\n");
 272                 fgAODFMDClusters = new TClonesArray("AliAODFmdCluster",500);
 273                 fgAODFMDClusters->SetName("fmdClusters");
 274                 handler->AddBranch("TClonesArray", &fgAODFMDClusters);
 275             }
 276             if ((handler->NeedsCaloClustersBranchReplication() || merging) && !(fgAODCaloClusters))
 277             {
 278                 if (fDebug > 1) AliInfo("Replicating CaloClusters branch\n");
 279                 fgAODCaloClusters = new TClonesArray("AliAODCaloCluster",500);
 280                 fgAODCaloClusters->SetName("caloClusters");
 281                 handler->AddBranch("TClonesArray", &fgAODCaloClusters);
 282
 283                 fgAODEmcalCells = new AliAODCaloCells();
 284                 fgAODEmcalCells->SetName("emcalCells");
 285                 handler->AddBranch("AliAODCaloCells", &fgAODEmcalCells);
 286
 287                 fgAODPhosCells = new AliAODCaloCells();
 288                 fgAODPhosCells->SetName("phosCells");
 289                 handler->AddBranch("AliAODCaloCells", &fgAODPhosCells);
 290             }
 291             if ((handler->NeedsMCParticlesBranchReplication() || merging) && !(fgAODMCParticles))
 292             {
 293                 if (fDebug > 1) AliInfo("Replicating MCParticles branch\n");
 294                 fgAODMCParticles = new TClonesArray("AliAODMCParticle",500);
 295                 fgAODMCParticles->SetName("mcparticles");
 296                 handler->AddBranch("TClonesArray", &fgAODMCParticles);
 297             }
 298             if ((handler->NeedsDimuonsBranchReplication() || merging) && !(fgAODDimuons))
 299             {
 300                 if (fDebug > 1) AliInfo("Replicating dimuon branch\n");
 301                 fgAODDimuons = new TClonesArray("AliAODDimuon",0);
 302                 fgAODDimuons->SetName("dimuons");
 303                 handler->AddBranch("TClonesArray", &fgAODDimuons);
 304             }
 305
 306             // cache the pointerd in the AODEvent
 307             fOutputAOD->GetStdContent();
 308         }
 309     }
 310     ConnectMultiHandler();
 311     UserCreateOutputObjects();
 312     DisconnectMultiHandler();
 313 }
 314
 315 void AliAnalysisTaskSE::Exec(Option_t* option)
 316 {
 317 //
 318 // Exec analysis of one event
 319
 320     ConnectMultiHandler();
 321
 322     if ( fDebug >= 10)
 323       printf("Task is active %5d\n", IsActive());
 324
 325     if (fDebug > 1) AliInfo("AliAnalysisTaskSE::Exec() \n");
 326 //
 327     AliAODHandler* handler = dynamic_cast<AliAODHandler*>
 328         ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
 329
 330     AliAODInputHandler* aodH = dynamic_cast<AliAODInputHandler*>(fInputHandler);
 331 //
 332 // Was event selected ? If no event selection mechanism, the event SHOULD be selected (AG)
 333     UInt_t isSelected = AliVEvent::kAny;
 334     if( fInputHandler && fInputHandler->GetEventSelection()) {
 335       // Get the actual offline trigger mask for the event and AND it with the
 336       // requested mask. If no mask requested select by default the event.
 337       if (fOfflineTriggerMask)
 338          isSelected = fOfflineTriggerMask & fInputHandler->IsEventSelected();
 339     }
 340 //  Functionality below moved in the filter tasks (AG)
 341 //    if (handler) handler->SetFillAOD(isSelected);
 342
 343     if( fInputHandler ) {
 344         fEntry = fInputHandler->GetReadEntry();
 345         fESDfriend = ((AliESDInputHandler*)fInputHandler)->GetESDfriend();
 346     }
 347
 348
 349 // Notify the change of run number
 350     if (InputEvent() && (InputEvent()->GetRunNumber() != fCurrentRunNumber)) {
 351         fCurrentRunNumber = InputEvent()->GetRunNumber();
 352         NotifyRun();
 353     }
 354
 355     else if( fMCEvent )
 356        fEntry = fMCEvent->Header()->GetEvent();
 357     if ( !((Entry()-1)%100) && fDebug > 0)
 358          AliInfo(Form("%s ----> Processing event # %lld", CurrentFileName(), Entry()));
 359
 360
 361
 362
 363     if (handler && aodH) {
 364         fMCEvent = aodH->MCEvent();
 365         Bool_t merging = aodH->GetMergeEvents();
 366         AliAODEvent* aod = dynamic_cast<AliAODEvent*>(InputEvent());
 367
 368         if (aod && !(handler->IsStandard()) && !(handler->AODIsReplicated())) {
 369             if ((handler->NeedsHeaderReplication()) && (fgAODHeader))
 370             {
 371               // copy the contents by assigment
 372               *fgAODHeader =  *(aod->GetHeader());
 373             }
 374             if ((handler->NeedsTracksBranchReplication() || merging) && (fgAODTracks))
 375             {
 376                 TClonesArray* tracks = aod->GetTracks();
 377                 new (fgAODTracks) TClonesArray(*tracks);
 378             }
 379             if ((handler->NeedsVerticesBranchReplication() || merging) && (fgAODVertices))
 380             {
 381                 TClonesArray* vertices = aod->GetVertices();
 382                 new (fgAODVertices) TClonesArray(*vertices);
 383             }
 384             if ((handler->NeedsV0sBranchReplication()) && (fgAODV0s))
 385             {
 386                 TClonesArray* v0s = aod->GetV0s();
 387                 new (fgAODV0s) TClonesArray(*v0s);
 388             }
 389             if ((handler->NeedsTrackletsBranchReplication()) && (fgAODTracklets))
 390             {
 391               *fgAODTracklets = *aod->GetTracklets();
 392             }
 393             if ((handler->NeedsPMDClustersBranchReplication()) && (fgAODPMDClusters))
 394             {
 395                 TClonesArray* pmdClusters = aod->GetPmdClusters();
 396                 new (fgAODPMDClusters) TClonesArray(*pmdClusters);
 397             }
 398             if ((handler->NeedsJetsBranchReplication() || merging) && (fgAODJets))
 399             {
 400                 TClonesArray* jets = aod->GetJets();
 401                 new (fgAODJets) TClonesArray(*jets);
 402             }
 403             if ((handler->NeedsFMDClustersBranchReplication()) && (fgAODFMDClusters))
 404             {
 405                 TClonesArray* fmdClusters = aod->GetFmdClusters();
 406                 new (fgAODFMDClusters) TClonesArray(*fmdClusters);
 407             }
 408             if ((handler->NeedsCaloClustersBranchReplication() || merging) && (fgAODCaloClusters))
 409             {
 410                 TClonesArray* caloClusters = aod->GetCaloClusters();
 411                 new (fgAODCaloClusters) TClonesArray(*caloClusters);
 412             }
 413
 414             if ((handler->NeedsMCParticlesBranchReplication() || merging) && (fgAODMCParticles))
 415             {
 416                 TClonesArray* mcParticles = (TClonesArray*) (aod->FindListObject("mcparticles"));
 417                 new (fgAODMCParticles) TClonesArray(*mcParticles);
 418             }
 419
 420             if ((handler->NeedsDimuonsBranchReplication() || merging) && (fgAODDimuons))
 421             {
 422                 fgAODDimuons->Clear();
 423                 TClonesArray& dimuons = *fgAODDimuons;
 424                 TClonesArray& tracksnew = *fgAODTracks;
 425
 426                 Int_t nMuonTrack[100];
 427                 for(Int_t imuon = 0; imuon < 100; imuon++) nMuonTrack[imuon] = 0;
 428                 Int_t nMuons=0;
 429                 for(Int_t ii=0; ii < fgAODTracks->GetEntries(); ii++){
 430                     AliAODTrack *track = (AliAODTrack*) fgAODTracks->At(ii);
 431                     if(track->IsMuonTrack()) {
 432                         nMuonTrack[nMuons]= ii;
 433                         nMuons++;
 434                     }
 435                 }
 436                 Int_t jDimuons=0;
 437                 if(nMuons >= 2){
 438                     for(Int_t i = 0; i < nMuons; i++){
 439                         Int_t index0 = nMuonTrack[i];
 440                         for(Int_t j = i+1; j < nMuons; j++){
 441                             Int_t index1 = nMuonTrack[j];
 442                             tracksnew.At(index0)->ResetBit(kIsReferenced);
 443                             tracksnew.At(index0)->SetUniqueID(0);
 444                             tracksnew.At(index1)->ResetBit(kIsReferenced);
 445                             tracksnew.At(index1)->SetUniqueID(0);
 446                             new(dimuons[jDimuons++]) AliAODDimuon(tracksnew.At(index0),tracksnew.At(index1));
 447                         }
 448                     }
 449                 }
 450             }
 451
 452             // Additional merging if needed
 453             if (merging) {
 454                 // mcParticles
 455                 TClonesArray* mcparticles = (TClonesArray*) ((aodH->GetEventToMerge())->FindListObject("mcparticles"));
 456                 Int_t npart = mcparticles->GetEntries();
 457                 Int_t nc = fgAODMCParticles->GetEntries();
 458                 Int_t nc0 = nc;
 459
 460                 for (Int_t i = 0; i < npart; i++) {
 461                     AliAODMCParticle* particle = (AliAODMCParticle*) mcparticles->At(i);
 462                     new((*fgAODMCParticles)[nc++]) AliAODMCParticle(*particle);
 463                 }
 464
 465                 // tracks
 466                 TClonesArray* tracks = aodH->GetEventToMerge()->GetTracks();
 467                 Int_t ntr = tracks->GetEntries();
 468                 nc  = fgAODTracks->GetEntries();
 469                 for (Int_t i = 0; i < ntr; i++) {
 470                     AliAODTrack*    track = (AliAODTrack*) tracks->At(i);
 471                     AliAODTrack* newtrack = new((*fgAODTracks)[nc++]) AliAODTrack(*track);
 472                     newtrack->SetLabel(newtrack->GetLabel() + nc0);
 473                 }
 474
 475                 for (Int_t i = 0; i < nc; i++)
 476                 {
 477                     AliAODTrack* track = (AliAODTrack*) fgAODTracks->At(i);
 478                     track->ResetBit(kIsReferenced);
 479                     track->SetUniqueID(0);
 480                 }
 481
 482
 483                 // clusters
 484                 TClonesArray* clusters = aodH->GetEventToMerge()->GetCaloClusters();
 485                 Int_t ncl  = clusters->GetEntries();
 486                 nc         =  fgAODCaloClusters->GetEntries();
 487                 for (Int_t i = 0; i < ncl; i++) {
 488                     AliAODCaloCluster*    cluster = (AliAODCaloCluster*) clusters->At(i);
 489                     new((*fgAODCaloClusters)[nc++]) AliAODCaloCluster(*cluster);
 490                 }
 491                 // cells
 492                 AliAODCaloCells* cellsA = aodH->GetEventToMerge()->GetEMCALCells();
 493                 Int_t ncells  = cellsA->GetNumberOfCells();
 494                 nc = fgAODEmcalCells->GetNumberOfCells();
 495
 496                 for (Int_t i  = 0; i < ncells; i++) {
 497                     Int_t cn  = cellsA->GetCellNumber(i);
 498                     Int_t pos = fgAODEmcalCells->GetCellPosition(cn);
 499                     if (pos >= 0) {
 500                         Double_t amp = cellsA->GetAmplitude(i) + fgAODEmcalCells->GetAmplitude(pos);
 501                         fgAODEmcalCells->SetCell(pos, cn, amp);
 502                     } else {
 503                         Double_t amp = cellsA->GetAmplitude(i);
 504                         fgAODEmcalCells->SetCell(nc++, cn, amp);
 505                         fgAODEmcalCells->Sort();
 506                     }
 507                 }
 508
 509
 510             } // merging
 511
 512             handler->SetAODIsReplicated();
 513         }
 514     }
 515
 516 // Call the user analysis
 517     if (!fMCEventHandler) {
 518         if (isSelected)
 519             UserExec(option);
 520     } else {
 521         if (isSelected && (fMCEventHandler->InitOk()))
 522             UserExec(option);
 523     }
 524
 525 // Added protection in case the derived task is not an AOD producer.
 526     AliAnalysisDataSlot *out0 = GetOutputSlot(0);
 527     if (out0 && out0->IsConnected()) PostData(0, fTreeA);
 528
 529     DisconnectMultiHandler();
 530 }
 531
 532 const char* AliAnalysisTaskSE::CurrentFileName()
 533 {
 534 // Returns the current file name
 535     if( fInputHandler )
 536       return fInputHandler->GetTree()->GetCurrentFile()->GetName();
 537     else if( fMCEvent )
 538       return ((AliMCEventHandler*) ((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler()))->TreeK()->GetCurrentFile()->GetName();
 539     else return "";
 540 }
 541
 542 void AliAnalysisTaskSE::AddAODBranch(const char* cname, void* addobj, const char *fname)
 543 {
 544     // Add a new branch to the aod tree
 545     AliAODHandler* handler = dynamic_cast<AliAODHandler*>
 546         ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
 547     if (handler) {
 548         handler->AddBranch(cname, addobj, fname);
 549     }
 550 }
 551
 552 Bool_t AliAnalysisTaskSE::IsStandardAOD() const
 553 {
 554 // Check if the output AOD handler is configured for standard or delta AOD.
 555 // Users should first check that AODEvent() returns non-null.
 556     AliAODHandler* handler = dynamic_cast<AliAODHandler*>
 557          ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
 558     if (!handler) {
 559        Error("IsStandardAOD", "No AOD handler. Please use AODEvent() to check this first");
 560        return kTRUE;
 561     }
 562     return handler->IsStandard();
 563 }
 564
 565 Bool_t AliAnalysisTaskSE::Notify()
 566 {
 567     return (UserNotify());
 568 }
 569
 570 const AliEventTag *AliAnalysisTaskSE::EventTag() const
 571 {
 572 // Returns tag for the current event, if any. The return value should always be checked by the user.
 573    if (!fInputHandler) {
 574       Error("EventTag", "Input handler not yet available. Call this in UserExec");
 575       return NULL;
 576    }
 577    return fInputHandler->GetEventTag();
 578 }
 579
 580 void AliAnalysisTaskSE::LoadBranches() const
 581 {
 582 // Load all branches declared in fBranchNames data member of the parent class.
 583 // Should be called in UserExec.
 584   if (!fInputHandler) {
 585      Error("LoadBranches", "Input handler not available yet. Call this in UserExec");
 586      return;
 587   }
 588   AliAnalysisManager *mgr = AliAnalysisManager::GetAnalysisManager();
 589   if (mgr->GetAutoBranchLoading()) return;
 590   TString taskbranches;
 591   GetBranches(fInputHandler->GetDataType(), taskbranches);
 592   if (taskbranches.IsNull()) return;
 593   TObjArray *arr = taskbranches.Tokenize(",");
 594   TIter next(arr);
 595   TObject *obj;
 596   while ((obj=next())) mgr->LoadBranch(obj->GetName());
 597 }
 598
 599
 600 //_________________________________________________________________________________________________
 601 void AliAnalysisTaskSE::ConnectMultiHandler()
 602 {
 603    //
 604    // Connect MultiHandler
 605    //
 606    fInputHandler = (AliInputEventHandler *)((AliAnalysisManager::GetAnalysisManager())->GetInputEventHandler());
 607    fMultiInputHandler = dynamic_cast<AliMultiInputEventHandler *>(fInputHandler);
 608    if (fMultiInputHandler) {
 609       fInputHandler = dynamic_cast<AliInputEventHandler *>(fMultiInputHandler->GetFirstInputEventHandler());
 610       fMCEventHandler = dynamic_cast<AliMCEventHandler *>(fMultiInputHandler->GetFirstMCEventHandler());
 611    } else {
 612       fMCEventHandler = dynamic_cast<AliMCEventHandler *>((AliAnalysisManager::GetAnalysisManager())->GetMCtruthEventHandler());
 613    }
 614    if (fMCEventHandler) fMCEvent = fMCEventHandler->MCEvent();
 615 }
 616
 617 //_________________________________________________________________________________________________
 618 void AliAnalysisTaskSE::DisconnectMultiHandler()
 619 {
 620    //
 621    // Disconnect MultiHandler
 622    //
 623    if (fMultiInputHandler) fInputHandler = fMultiInputHandler;
 624 }