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 **************************************************************************/
18 Revision 1.4.6.2 2002/07/24 10:08:13 alibrary
21 Revision 1.6 2002/07/16 13:48:39 jchudoba
22 Add methods to get access to names of files used in merging. Correct memory leak in dtor (thanks to Yves Schutz.)
24 Revision 1.5 2002/04/09 13:38:47 jchudoba
25 Add const to the filename argument
27 Revision 1.4 2001/12/03 07:10:13 jchudoba
28 Default ctor cannot create new objects, create dummy default ctor which leaves object in not well defined state - to be used only by root for I/O
30 Revision 1.3 2001/10/15 17:31:56 jchudoba
33 Revision 1.2 2001/10/04 15:58:52 jchudoba
34 Option to open the stream in READ or UPDATE mode
36 Revision 1.1 2001/09/19 06:20:50 jchudoba
37 Class to manage input filenames, used by AliRunDigitizer
41 ////////////////////////////////////////////////////////////////////////
45 // - store file names associated with a given stream
46 // - open and close files
47 // - return serial event number of the next event in the stream
48 // and the TFile pointer for a proper file
50 ////////////////////////////////////////////////////////////////////////
57 #include "AliStream.h"
63 AliStream::AliStream()
65 // root requires default ctor, where no new objects can be created
66 // do not use this ctor, it is supplied only for root needs
72 ////////////////////////////////////////////////////////////////////////
73 AliStream::AliStream(Option_t *option)
76 fLastEventSerialNr = -1;
78 fCurrentFileIndex = -1;
81 fFileNames = new TObjArray(1);
85 ////////////////////////////////////////////////////////////////////////
86 AliStream::~AliStream()
95 ////////////////////////////////////////////////////////////////////////
96 void AliStream::AddFile(const char *fileName)
98 // stores the name of the file
99 TObjString *name = new TObjString(fileName);
100 fFileNames->Add(name);
103 ////////////////////////////////////////////////////////////////////////
104 Bool_t AliStream::NextEventInStream(Int_t &serialNr)
106 // returns kFALSE if no more events
107 // returns kTRUE and the serial nr of the next event
108 // fCurrentFile points to the file containing offered event
111 if (fFileNames->GetLast() < 0) return kFALSE;
114 if (!OpenNextFile()) return kFALSE;
117 if (fLastEventSerialNr+1 >= fEvents) {
118 if (!OpenNextFile()) return kFALSE;
120 serialNr = ++fLastEventSerialNr;
124 ////////////////////////////////////////////////////////////////////////
125 void AliStream::ChangeMode(Option_t* option)
126 // set the mode to READ or UPDATE, reopen file with the new mode
127 // only change from UPDATE to READ have sense in the current scheme,
128 // other changes are possible but not usefull
132 fCurrentFile->Close();
138 ////////////////////////////////////////////////////////////////////////
139 Bool_t AliStream::OpenNextFile()
141 if (++fCurrentFileIndex > fFileNames->GetLast()) {
142 cerr<<"No more files in the stream"<<endl;
146 const char * filename =
147 static_cast<TObjString*>(fFileNames->At(fCurrentFileIndex))->GetName();
149 // check if the file was already opened by some other code
150 TFile *f = (TFile *)(gROOT->GetListOfFiles()->FindObject(filename));
154 if (fCurrentFile->IsOpen()) {
155 fCurrentFile->Close();
159 fCurrentFile = TFile::Open(filename,fMode.Data());
161 // cannot open file specified on input. Do not skip it silently.
162 cerr<<"Cannot open file "<<filename<<endl;
165 // find nr of events in the given file
166 TTree * te = (TTree *) fCurrentFile->Get("TE") ;
168 Error("OpenNextFile", "input file does not contain TE");
171 fEvents = static_cast<Int_t>(te->GetEntries());
172 fLastEventSerialNr = -1;
176 ////////////////////////////////////////////////////////////////////////
177 Bool_t AliStream::ImportgAlice()
179 if (fFileNames->GetLast() < 0) return kFALSE;
181 if (!OpenNextFile()) return kFALSE;
183 gAlice = (AliRun*)fCurrentFile->Get("gAlice");
184 if (!gAlice) return kFALSE;
187 ////////////////////////////////////////////////////////////////////////
188 TString AliStream::GetFileName(const Int_t order) const
189 // returns name of the order-th file
190 // returns empty string if such file does not exist
191 // first file in the input stream is 0
193 TString fileName("");
194 if (order > fFileNames->GetLast()) return fileName;
195 TObjString *fileNameStored = dynamic_cast<TObjString*>(fFileNames->At(order));
196 if (fileNameStored) fileName = fileNameStored->GetString();
199 ////////////////////////////////////////////////////////////////////////