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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 | $Log$ | |
3466e07f | 18 | Revision 1.4 2001/12/03 07:10:13 jchudoba |
19 | 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 | |
20 | ||
314558d7 | 21 | Revision 1.3 2001/10/15 17:31:56 jchudoba |
22 | Bug correction | |
23 | ||
fb0b99cb | 24 | Revision 1.2 2001/10/04 15:58:52 jchudoba |
25 | Option to open the stream in READ or UPDATE mode | |
26 | ||
6873edea | 27 | Revision 1.1 2001/09/19 06:20:50 jchudoba |
28 | Class to manage input filenames, used by AliRunDigitizer | |
29 | ||
77843484 | 30 | */ |
31 | ||
32 | //////////////////////////////////////////////////////////////////////// | |
33 | // | |
34 | // AliStream.cxx | |
35 | // | |
36 | // - store file names associated with a given stream | |
37 | // - open and close files | |
38 | // - return serial event number of the next event in the stream | |
39 | // and the TFile pointer for a proper file | |
40 | // | |
41 | //////////////////////////////////////////////////////////////////////// | |
42 | ||
43 | #include <iostream.h> | |
44 | ||
45 | #include "TTree.h" | |
3466e07f | 46 | #include "TROOT.h" |
77843484 | 47 | |
48 | #include "AliStream.h" | |
49 | ||
50 | #include "AliRun.h" | |
51 | ||
52 | ClassImp(AliStream) | |
53 | ||
54 | AliStream::AliStream() | |
55 | { | |
314558d7 | 56 | // root requires default ctor, where no new objects can be created |
57 | // do not use this ctor, it is supplied only for root needs | |
77843484 | 58 | fCurrentFile = 0; |
59 | fEvents = 0; | |
314558d7 | 60 | fFileNames = 0; |
6873edea | 61 | } |
62 | ||
63 | //////////////////////////////////////////////////////////////////////// | |
64 | AliStream::AliStream(Option_t *option) | |
65 | { | |
66 | // ctor | |
67 | fLastEventSerialNr = -1; | |
68 | fLastEventNr = 0; | |
69 | fCurrentFileIndex = -1; | |
70 | fCurrentFile = 0; | |
71 | fEvents = 0; | |
72 | fFileNames = new TObjArray(1); | |
73 | fMode = option; | |
77843484 | 74 | } |
75 | ||
76 | //////////////////////////////////////////////////////////////////////// | |
77 | AliStream::~AliStream() | |
78 | { | |
79 | // default dtor | |
80 | if (fFileNames) delete fFileNames; | |
81 | } | |
82 | ||
83 | //////////////////////////////////////////////////////////////////////// | |
3466e07f | 84 | void AliStream::AddFile(const char *fileName) |
77843484 | 85 | { |
86 | // stores the name of the file | |
87 | TObjString *name = new TObjString(fileName); | |
88 | fFileNames->Add(name); | |
89 | } | |
90 | ||
91 | //////////////////////////////////////////////////////////////////////// | |
92 | Bool_t AliStream::NextEventInStream(Int_t &serialNr) | |
93 | { | |
94 | // returns kFALSE if no more events | |
95 | // returns kTRUE and the serial nr of the next event | |
96 | // fCurrentFile points to the file containing offered event | |
97 | ||
98 | // no files given: | |
99 | if (fFileNames->GetLast() < 0) return kFALSE; | |
100 | ||
101 | if (!fCurrentFile) { | |
102 | if (!OpenNextFile()) return kFALSE; | |
103 | } | |
104 | ||
105 | if (fLastEventSerialNr+1 >= fEvents) { | |
106 | if (!OpenNextFile()) return kFALSE; | |
107 | } | |
108 | serialNr = ++fLastEventSerialNr; | |
109 | return kTRUE; | |
110 | } | |
111 | ||
6873edea | 112 | //////////////////////////////////////////////////////////////////////// |
113 | void AliStream::ChangeMode(Option_t* option) | |
114 | // set the mode to READ or UPDATE, reopen file with the new mode | |
115 | // only change from UPDATE to READ have sense in the current scheme, | |
116 | // other changes are possible but not usefull | |
117 | { | |
118 | fMode = option; | |
119 | if (fCurrentFile) { | |
120 | fCurrentFile->Close(); | |
121 | fCurrentFileIndex--; | |
122 | OpenNextFile(); | |
123 | } | |
124 | } | |
125 | ||
77843484 | 126 | //////////////////////////////////////////////////////////////////////// |
127 | Bool_t AliStream::OpenNextFile() | |
128 | { | |
fb0b99cb | 129 | if (++fCurrentFileIndex > fFileNames->GetLast()) { |
130 | cerr<<"No more files in the stream"<<endl; | |
131 | return kFALSE; | |
132 | } | |
133 | ||
3466e07f | 134 | const char * filename = |
135 | static_cast<TObjString*>(fFileNames->At(fCurrentFileIndex))->GetName(); | |
136 | ||
137 | // check if the file was already opened by some other code | |
138 | TFile *f = (TFile *)(gROOT->GetListOfFiles()->FindObject(filename)); | |
139 | if (f) f->Close(); | |
140 | ||
6873edea | 141 | if (fCurrentFile) { |
142 | if (fCurrentFile->IsOpen()) { | |
143 | fCurrentFile->Close(); | |
144 | } | |
145 | } | |
146 | ||
6873edea | 147 | fCurrentFile = TFile::Open(filename,fMode.Data()); |
77843484 | 148 | if (!fCurrentFile) { |
149 | // cannot open file specified on input. Do not skip it silently. | |
150 | cerr<<"Cannot open file "<<filename<<endl; | |
151 | return kFALSE; | |
152 | } | |
153 | // find nr of events in the given file | |
154 | TTree * te = (TTree *) fCurrentFile->Get("TE") ; | |
155 | if (!te) { | |
156 | Error("OpenNextFile", "input file does not contain TE"); | |
157 | return kFALSE; | |
158 | } | |
159 | fEvents = static_cast<Int_t>(te->GetEntries()); | |
160 | fLastEventSerialNr = -1; | |
161 | return kTRUE; | |
162 | } | |
163 | ||
164 | //////////////////////////////////////////////////////////////////////// | |
165 | Bool_t AliStream::ImportgAlice() | |
166 | { | |
167 | if (fFileNames->GetLast() < 0) return kFALSE; | |
168 | if (!fCurrentFile) { | |
169 | if (!OpenNextFile()) return kFALSE; | |
170 | } | |
171 | gAlice = (AliRun*)fCurrentFile->Get("gAlice"); | |
172 | if (!gAlice) return kFALSE; | |
173 | return kTRUE; | |
174 | } |