1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
16 ///////////////////////////////////////////////////////////////////////////////
18 /// This is a class for reading raw data from a root chain.
19 /// There are two constructors available - one from a text file containing the
20 /// list of root raw-data files to be processed and one directly from
23 /// cvetan.cheshkov@cern.ch 29/07/2008
25 ///////////////////////////////////////////////////////////////////////////////
28 #include <TFileCollection.h>
30 #include "AliRawReaderChain.h"
31 #include "AliRawEvent.h"
33 ClassImp(AliRawReaderChain)
35 AliRawReaderChain::AliRawReaderChain() :
39 // default constructor
42 AliRawReaderChain::AliRawReaderChain(const char* listFileName) :
46 // create raw-reader objects which takes as an input a root chain
47 // from the file list found in 'listFileName'
49 TFileCollection collection("RAW",
50 "Collection with raw-data files",
53 fChain = new TChain("RAW");
54 if (!fChain->AddFileInfoList((TCollection*)(collection.GetList()))) {
55 Error("AliRawReaderChain","Bad file list in collection, the chain is empty");
60 fChain->SetBranchStatus("*",1);
61 fChain->SetBranchAddress("rawevent",&fEvent,&fBranch);
64 AliRawReaderChain::AliRawReaderChain(TFileCollection *collection) :
68 // create raw-reader objects which takes as an input a root chain
69 // from a root file collection
71 fChain = new TChain("RAW");
72 if (!fChain->AddFileInfoList((TCollection*)(collection->GetList()))) {
73 Error("AliRawReaderChain","Bad file list in collection, the chain is empty");
78 fChain->SetBranchStatus("*",1);
79 fChain->SetBranchAddress("rawevent",&fEvent,&fBranch);
82 AliRawReaderChain::AliRawReaderChain(TChain *chain) :
86 // create raw-reader objects which takes as an input a root chain
87 // from a root file collection
89 if (!fChain) fIsValid = kFALSE;
91 fChain->SetBranchStatus("*",1);
92 fChain->SetBranchAddress("rawevent",&fEvent,&fBranch);
95 AliRawReaderChain::AliRawReaderChain(const AliRawReaderChain& rawReader) :
96 AliRawReaderRoot(rawReader),
97 fChain(rawReader.fChain)
102 AliRawReaderChain& AliRawReaderChain::operator = (const AliRawReaderChain&
105 // assignment operator
107 this->~AliRawReaderChain();
108 new(this) AliRawReaderChain(rawReader);
112 AliRawReaderChain::~AliRawReaderChain()
114 // delete objects and close root file
122 Bool_t AliRawReaderChain::NextEvent()
124 // go to the next event in the root file
126 if (!fChain || !fChain->GetListOfFiles()->GetEntriesFast()) return kFALSE;
130 fEvent = new AliRawEvent;
131 Long64_t treeEntry = fChain->LoadTree(fEventIndex+1);
134 if (fBranch->GetEntry(treeEntry) <= 0)
137 } while (!IsEventSelected());
142 Bool_t AliRawReaderChain::RewindEvents()
144 // go back to the beginning of the root file
148 fEvent = new AliRawEvent;
153 Bool_t AliRawReaderChain::GotoEvent(Int_t event)
155 // go to a particular event
156 // Uses the absolute event index inside the
157 // chain with raw data
159 if (!fChain || !fChain->GetListOfFiles()->GetEntriesFast()) return kFALSE;
162 fEvent = new AliRawEvent;
163 Long64_t treeEntry = fChain->LoadTree(event);
166 if (fBranch->GetEntry(treeEntry) <= 0)
173 Int_t AliRawReaderChain::GetNumberOfEvents() const
175 // Get the total number of events in the chain
178 if (!fChain) return -1;
180 return fChain->GetEntries();