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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 | //---------------------------------------------------------------------- | |
19 | // AliStream.cxx | |
20 | // - store file names associated with a given stream | |
21 | // - open and close files | |
22 | // - return serial event number of the next event in the stream | |
23 | // and the TFile pointer for a proper file | |
24 | //---------------------------------------------------------------------- | |
25 | ||
26 | #include <Riostream.h> | |
27 | ||
28 | #include "TFile.h" | |
29 | #include "TObjString.h" | |
30 | #include "TROOT.h" | |
31 | #include "TTree.h" | |
32 | ||
33 | #include "AliRun.h" | |
34 | #include "AliStream.h" | |
35 | ||
36 | ClassImp(AliStream) | |
37 | ||
38 | //_______________________________________________________________________ | |
39 | AliStream::AliStream(): | |
40 | fLastEventSerialNr(0), | |
41 | fLastEventNr(0), | |
42 | fCurrentFileIndex(0), | |
43 | fEvents(0), | |
44 | fMode(0), | |
45 | fCurrentFile(0), | |
46 | fFileNames(0) | |
47 | { | |
48 | // | |
49 | // root requires default ctor, where no new objects can be created | |
50 | // do not use this ctor, it is supplied only for root needs | |
51 | // | |
52 | } | |
53 | ||
54 | //_______________________________________________________________________ | |
55 | AliStream::AliStream(Option_t *option): | |
56 | fLastEventSerialNr(-1), | |
57 | fLastEventNr(0), | |
58 | fCurrentFileIndex(-1), | |
59 | fEvents(0), | |
60 | fMode(option), | |
61 | fCurrentFile(0), | |
62 | fFileNames(new TObjArray(1)) | |
63 | { | |
64 | // | |
65 | // Default ctor | |
66 | // | |
67 | } | |
68 | ||
69 | //_______________________________________________________________________ | |
70 | AliStream::AliStream(const AliStream& str): | |
71 | TNamed(str), | |
72 | fLastEventSerialNr(0), | |
73 | fLastEventNr(0), | |
74 | fCurrentFileIndex(0), | |
75 | fEvents(0), | |
76 | fMode(0), | |
77 | fCurrentFile(0), | |
78 | fFileNames(0) | |
79 | { | |
80 | // | |
81 | // Copy ctor | |
82 | // | |
83 | str.Copy(*this); | |
84 | } | |
85 | ||
86 | //_______________________________________________________________________ | |
87 | void AliStream::Copy(AliStream& ) const | |
88 | { | |
89 | Fatal("Copy","Not implemented\n"); | |
90 | } | |
91 | ||
92 | //_______________________________________________________________________ | |
93 | AliStream::~AliStream() | |
94 | { | |
95 | // default dtor | |
96 | if (fFileNames) { | |
97 | fFileNames->Delete(); | |
98 | delete fFileNames; | |
99 | } | |
100 | } | |
101 | ||
102 | //_______________________________________________________________________ | |
103 | void AliStream::AddFile(const char *fileName) | |
104 | { | |
105 | // stores the name of the file | |
106 | TObjString *name = new TObjString(fileName); | |
107 | fFileNames->Add(name); | |
108 | } | |
109 | ||
110 | //_______________________________________________________________________ | |
111 | Bool_t AliStream::NextEventInStream(Int_t &serialNr) | |
112 | { | |
113 | // returns kFALSE if no more events | |
114 | // returns kTRUE and the serial nr of the next event | |
115 | // fCurrentFile points to the file containing offered event | |
116 | ||
117 | // no files given: | |
118 | if (fFileNames->GetLast() < 0) return kFALSE; | |
119 | ||
120 | if (!fCurrentFile) { | |
121 | if (!OpenNextFile()) return kFALSE; | |
122 | } | |
123 | ||
124 | if (fLastEventSerialNr+1 >= fEvents) { | |
125 | if (!OpenNextFile()) return kFALSE; | |
126 | } | |
127 | ||
128 | fLastEventSerialNr++; | |
129 | // in some cases the serial number does not start from 0, find the | |
130 | // number of the next event | |
131 | char name[20]; | |
132 | sprintf(name, "TreeS%d", ++fLastEventNr); | |
133 | while (!fCurrentFile->Get(name) && fLastEventNr < fEvents) | |
134 | sprintf(name, "TreeS%d", ++fLastEventNr); | |
135 | serialNr = fLastEventNr; | |
136 | ||
137 | return kTRUE; | |
138 | } | |
139 | ||
140 | //_______________________________________________________________________ | |
141 | void AliStream::ChangeMode(Option_t* option) | |
142 | { | |
143 | // set the mode to READ or UPDATE, reopen file with the new mode | |
144 | // only change from UPDATE to READ have sense in the current scheme, | |
145 | // other changes are possible but not usefull | |
146 | fMode = option; | |
147 | if (fCurrentFile) { | |
148 | fCurrentFile->Close(); | |
149 | fCurrentFileIndex--; | |
150 | OpenNextFile(); | |
151 | } | |
152 | } | |
153 | ||
154 | //_______________________________________________________________________ | |
155 | Bool_t AliStream::OpenNextFile() | |
156 | { | |
157 | // | |
158 | // Open the next file in the series | |
159 | // | |
160 | if (++fCurrentFileIndex > fFileNames->GetLast()) { | |
161 | cerr<<"No more files in the stream"<<endl; | |
162 | return kFALSE; | |
163 | } | |
164 | ||
165 | const char * filename = | |
166 | static_cast<TObjString*>(fFileNames->At(fCurrentFileIndex))->GetName(); | |
167 | ||
168 | // check if the file was already opened by some other code | |
169 | TFile *f = dynamic_cast<TFile*>(gROOT->GetListOfFiles()->FindObject(filename)); | |
170 | if (f) f->Close(); | |
171 | ||
172 | if (fCurrentFile) { | |
173 | if (fCurrentFile->IsOpen()) { | |
174 | fCurrentFile->Close(); | |
175 | } | |
176 | } | |
177 | ||
178 | fCurrentFile = TFile::Open(filename,fMode.Data()); | |
179 | if (!fCurrentFile) { | |
180 | // cannot open file specified on input. Do not skip it silently. | |
181 | cerr<<"Cannot open file "<<filename<<endl; | |
182 | return kFALSE; | |
183 | } | |
184 | // find nr of events in the given file | |
185 | TTree * te = dynamic_cast<TTree *>(fCurrentFile->Get("TE")); | |
186 | if (!te) { | |
187 | Error("OpenNextFile", "input file does not contain TE"); | |
188 | return kFALSE; | |
189 | } | |
190 | fEvents = static_cast<Int_t>(te->GetEntries()); | |
191 | fLastEventSerialNr = -1; | |
192 | fLastEventNr = -1; | |
193 | return kTRUE; | |
194 | } | |
195 | ||
196 | //_______________________________________________________________________ | |
197 | Bool_t AliStream::ImportgAlice() | |
198 | { | |
199 | // | |
200 | // Import AliRun object pointed from gAlice | |
201 | // | |
202 | if (fFileNames->GetLast() < 0) return kFALSE; | |
203 | if (!fCurrentFile) { | |
204 | if (!OpenNextFile()) return kFALSE; | |
205 | } | |
206 | gAlice = dynamic_cast<AliRun*>(fCurrentFile->Get("gAlice")); | |
207 | if (!gAlice) return kFALSE; | |
208 | return kTRUE; | |
209 | } | |
210 | ||
211 | //_______________________________________________________________________ | |
212 | TString AliStream::GetFileName(const Int_t order) const | |
213 | { | |
214 | // returns name of the order-th file | |
215 | // returns empty string if such file does not exist | |
216 | // first file in the input stream is 0 | |
217 | TString fileName(""); | |
218 | if (order > fFileNames->GetLast()) return fileName; | |
219 | TObjString *fileNameStored = dynamic_cast<TObjString*>(fFileNames->At(order)); | |
220 | if (fileNameStored) fileName = fileNameStored->GetString(); | |
221 | return fileName; | |
222 | } | |
223 |