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77843484 | 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 | /* | |
17 | $Log$ | |
b9d0a01d | 18 | Revision 1.4.6.2 2002/07/24 10:08:13 alibrary |
19 | Updating VirtualMC | |
20 | ||
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.) | |
23 | ||
f7ae2b32 | 24 | Revision 1.5 2002/04/09 13:38:47 jchudoba |
25 | Add const to the filename argument | |
26 | ||
3466e07f | 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 | |
29 | ||
314558d7 | 30 | Revision 1.3 2001/10/15 17:31:56 jchudoba |
31 | Bug correction | |
32 | ||
fb0b99cb | 33 | Revision 1.2 2001/10/04 15:58:52 jchudoba |
34 | Option to open the stream in READ or UPDATE mode | |
35 | ||
6873edea | 36 | Revision 1.1 2001/09/19 06:20:50 jchudoba |
37 | Class to manage input filenames, used by AliRunDigitizer | |
38 | ||
77843484 | 39 | */ |
40 | ||
41 | //////////////////////////////////////////////////////////////////////// | |
42 | // | |
43 | // AliStream.cxx | |
44 | // | |
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 | |
49 | // | |
50 | //////////////////////////////////////////////////////////////////////// | |
51 | ||
52 | #include <iostream.h> | |
53 | ||
54 | #include "TTree.h" | |
3466e07f | 55 | #include "TROOT.h" |
77843484 | 56 | |
57 | #include "AliStream.h" | |
58 | ||
59 | #include "AliRun.h" | |
60 | ||
61 | ClassImp(AliStream) | |
62 | ||
63 | AliStream::AliStream() | |
64 | { | |
314558d7 | 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 | |
77843484 | 67 | fCurrentFile = 0; |
68 | fEvents = 0; | |
314558d7 | 69 | fFileNames = 0; |
6873edea | 70 | } |
71 | ||
72 | //////////////////////////////////////////////////////////////////////// | |
73 | AliStream::AliStream(Option_t *option) | |
74 | { | |
75 | // ctor | |
76 | fLastEventSerialNr = -1; | |
77 | fLastEventNr = 0; | |
78 | fCurrentFileIndex = -1; | |
79 | fCurrentFile = 0; | |
80 | fEvents = 0; | |
81 | fFileNames = new TObjArray(1); | |
82 | fMode = option; | |
77843484 | 83 | } |
84 | ||
85 | //////////////////////////////////////////////////////////////////////// | |
86 | AliStream::~AliStream() | |
87 | { | |
88 | // default dtor | |
f7ae2b32 | 89 | if (fFileNames) { |
90 | fFileNames->Delete(); | |
91 | delete fFileNames; | |
92 | } | |
77843484 | 93 | } |
94 | ||
95 | //////////////////////////////////////////////////////////////////////// | |
3466e07f | 96 | void AliStream::AddFile(const char *fileName) |
77843484 | 97 | { |
98 | // stores the name of the file | |
99 | TObjString *name = new TObjString(fileName); | |
100 | fFileNames->Add(name); | |
101 | } | |
102 | ||
103 | //////////////////////////////////////////////////////////////////////// | |
104 | Bool_t AliStream::NextEventInStream(Int_t &serialNr) | |
105 | { | |
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 | |
109 | ||
110 | // no files given: | |
111 | if (fFileNames->GetLast() < 0) return kFALSE; | |
112 | ||
113 | if (!fCurrentFile) { | |
114 | if (!OpenNextFile()) return kFALSE; | |
115 | } | |
116 | ||
117 | if (fLastEventSerialNr+1 >= fEvents) { | |
118 | if (!OpenNextFile()) return kFALSE; | |
119 | } | |
120 | serialNr = ++fLastEventSerialNr; | |
121 | return kTRUE; | |
122 | } | |
123 | ||
6873edea | 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 | |
129 | { | |
130 | fMode = option; | |
131 | if (fCurrentFile) { | |
132 | fCurrentFile->Close(); | |
133 | fCurrentFileIndex--; | |
134 | OpenNextFile(); | |
135 | } | |
136 | } | |
137 | ||
77843484 | 138 | //////////////////////////////////////////////////////////////////////// |
139 | Bool_t AliStream::OpenNextFile() | |
140 | { | |
fb0b99cb | 141 | if (++fCurrentFileIndex > fFileNames->GetLast()) { |
142 | cerr<<"No more files in the stream"<<endl; | |
143 | return kFALSE; | |
144 | } | |
145 | ||
3466e07f | 146 | const char * filename = |
147 | static_cast<TObjString*>(fFileNames->At(fCurrentFileIndex))->GetName(); | |
148 | ||
149 | // check if the file was already opened by some other code | |
150 | TFile *f = (TFile *)(gROOT->GetListOfFiles()->FindObject(filename)); | |
151 | if (f) f->Close(); | |
152 | ||
6873edea | 153 | if (fCurrentFile) { |
154 | if (fCurrentFile->IsOpen()) { | |
155 | fCurrentFile->Close(); | |
156 | } | |
157 | } | |
158 | ||
6873edea | 159 | fCurrentFile = TFile::Open(filename,fMode.Data()); |
77843484 | 160 | if (!fCurrentFile) { |
161 | // cannot open file specified on input. Do not skip it silently. | |
162 | cerr<<"Cannot open file "<<filename<<endl; | |
163 | return kFALSE; | |
164 | } | |
165 | // find nr of events in the given file | |
166 | TTree * te = (TTree *) fCurrentFile->Get("TE") ; | |
167 | if (!te) { | |
168 | Error("OpenNextFile", "input file does not contain TE"); | |
169 | return kFALSE; | |
170 | } | |
171 | fEvents = static_cast<Int_t>(te->GetEntries()); | |
172 | fLastEventSerialNr = -1; | |
173 | return kTRUE; | |
174 | } | |
175 | ||
176 | //////////////////////////////////////////////////////////////////////// | |
177 | Bool_t AliStream::ImportgAlice() | |
178 | { | |
179 | if (fFileNames->GetLast() < 0) return kFALSE; | |
180 | if (!fCurrentFile) { | |
181 | if (!OpenNextFile()) return kFALSE; | |
182 | } | |
183 | gAlice = (AliRun*)fCurrentFile->Get("gAlice"); | |
184 | if (!gAlice) return kFALSE; | |
185 | return kTRUE; | |
186 | } | |
f7ae2b32 | 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 | |
192 | { | |
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(); | |
197 | return fileName; | |
198 | } | |
199 | //////////////////////////////////////////////////////////////////////// |