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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 | #include <TROOT.h> | |
19 | #include <TFile.h> | |
20 | #include <TObjString.h> | |
21 | ||
22 | #include "AliLoader.h" | |
23 | #include "AliRun.h" | |
24 | #include "AliStream.h" | |
25 | ||
26 | //////////////////////////////////////////////////////////////////////// | |
27 | // | |
28 | // AliStream.cxx | |
29 | // | |
30 | // - store file names associated with a given stream | |
31 | // - open and close files | |
32 | // - return serial event number of the next event in the stream | |
33 | // and the TFile pointer for a proper file | |
34 | // Author: Jiri Chudoba (CERN), 2001 | |
35 | // | |
36 | //////////////////////////////////////////////////////////////////////// | |
37 | ||
38 | ClassImp(AliStream) | |
39 | ||
40 | AliStream::AliStream(): | |
41 | fLastEventSerialNr(-1), | |
42 | fLastEventNr(0), | |
43 | fCurrentFileIndex(-1), | |
44 | fEvents(0), | |
45 | fMode(0), | |
46 | fFileNames(0x0), | |
47 | fEventFolderName(0) | |
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 | AliStream::AliStream(const char* foldername,Option_t *option): | |
55 | fLastEventSerialNr(-1), | |
56 | fLastEventNr(0), | |
57 | fCurrentFileIndex(-1), | |
58 | fEvents(0), | |
59 | fMode(option), | |
60 | fFileNames(new TObjArray(1)), | |
61 | fEventFolderName(foldername) | |
62 | { | |
63 | // ctor | |
64 | } | |
65 | //_______________________________________________________________________ | |
66 | ||
67 | AliStream::AliStream(const AliStream &as): | |
68 | TNamed(as), | |
69 | fLastEventSerialNr(-1), | |
70 | fLastEventNr(0), | |
71 | fCurrentFileIndex(-1), | |
72 | fEvents(0), | |
73 | fMode(0), | |
74 | fFileNames(0x0), | |
75 | fEventFolderName(" ") | |
76 | { | |
77 | // | |
78 | // Copy ctor | |
79 | // | |
80 | as.Copy(*this); | |
81 | } | |
82 | //_______________________________________________________________________ | |
83 | ||
84 | AliStream::~AliStream() | |
85 | { | |
86 | // default dtor | |
87 | delete AliRunLoader::GetRunLoader(fEventFolderName); //clear the eventuall session | |
88 | if (fFileNames) delete fFileNames; | |
89 | } | |
90 | //_______________________________________________________________________ | |
91 | ||
92 | void AliStream::Copy(TObject &) const | |
93 | { | |
94 | // | |
95 | // Copy function | |
96 | // | |
97 | Fatal("Copy","Not implemented!"); | |
98 | } | |
99 | //_______________________________________________________________________ | |
100 | ||
101 | void AliStream::AddFile(const char *fileName) | |
102 | { | |
103 | // stores the name of the file | |
104 | TObjString *name = new TObjString(fileName); | |
105 | fFileNames->Add(name); | |
106 | } | |
107 | //_______________________________________________________________________ | |
108 | ||
109 | Bool_t AliStream::NextEventInStream() | |
110 | { | |
111 | // returns kFALSE if no more events | |
112 | // returns kTRUE and the serial nr of the next event | |
113 | // fCurrentFile points to the file containing offered event | |
114 | ||
115 | // no files given: | |
116 | if (fFileNames->GetLast() < 0) return kFALSE; | |
117 | ||
118 | AliRunLoader* currentloader = AliRunLoader::GetRunLoader(fEventFolderName); | |
119 | if (currentloader == 0x0) | |
120 | { | |
121 | Info("NextEventInStream", | |
122 | "Can not get RL from folder named %s. Attempting to open next file", | |
123 | fEventFolderName.Data()); | |
124 | Int_t res = OpenNextFile(); | |
125 | if ( res == 0) return kFALSE; | |
126 | currentloader = AliRunLoader::GetRunLoader(fEventFolderName); | |
127 | } | |
128 | ||
129 | if (fLastEventSerialNr+1 >= fEvents) | |
130 | { | |
131 | if (!OpenNextFile()) return kFALSE; | |
132 | } | |
133 | Info("NextEventInStream","Trying to get event %d",fLastEventSerialNr+1); | |
134 | currentloader->GetEvent(++fLastEventSerialNr); | |
135 | return kTRUE; | |
136 | } | |
137 | //_______________________________________________________________________ | |
138 | ||
139 | void AliStream::ChangeMode(Option_t* option) | |
140 | { | |
141 | // set the mode to READ or UPDATE, reopen file with the new mode | |
142 | // only change from UPDATE to READ have sense in the current scheme, | |
143 | // other changes are possible but not usefull | |
144 | ||
145 | fMode = option; | |
146 | AliRunLoader* currentloader = AliRunLoader::GetRunLoader(fEventFolderName); | |
147 | if (currentloader) { | |
148 | delete currentloader; | |
149 | fCurrentFileIndex--; | |
150 | OpenNextFile(); | |
151 | } | |
152 | } | |
153 | //_______________________________________________________________________ | |
154 | ||
155 | Bool_t AliStream::OpenNextFile() | |
156 | { | |
157 | // | |
158 | // Opens next file in the list | |
159 | // | |
160 | if (++fCurrentFileIndex > fFileNames->GetLast()) { | |
161 | Error("OpenNextFile", "No more files in the stream") ; | |
162 | return kFALSE; | |
163 | } | |
164 | ||
165 | const char* filename = static_cast<TObjString*>(fFileNames->At(fCurrentFileIndex))->GetName(); | |
166 | ||
167 | // check if the file was already opened by some other code | |
168 | TFile *f = (TFile *)(gROOT->GetListOfFiles()->FindObject(filename)); | |
169 | if (f) f->Close(); | |
170 | ||
171 | AliRunLoader* currentloader = AliRunLoader::GetRunLoader(fEventFolderName); | |
172 | ||
173 | if (currentloader) | |
174 | { | |
175 | delete currentloader; | |
176 | } | |
177 | ||
178 | currentloader = AliRunLoader::Open(filename,fEventFolderName,fMode); | |
179 | ||
180 | ||
181 | if (currentloader == 0x0) | |
182 | { | |
183 | // cannot open file specified on input. Do not skip it silently. | |
184 | Error("OpenNextFile", "Cannot open session "); | |
185 | return kFALSE; | |
186 | } | |
187 | ||
188 | // find nr of events in the given file | |
189 | ||
190 | if ( AliLoader::TestFileOption(fMode) )//tests if file is opened in read or update mode | |
191 | { | |
192 | Int_t res = currentloader->LoadHeader(); | |
193 | if (res) | |
194 | { | |
195 | Error("OpenNextFile","Problems with loading header"); | |
196 | return kFALSE; | |
197 | } | |
198 | fEvents = static_cast<Int_t>(currentloader->TreeE()->GetEntries()); | |
199 | } | |
200 | else | |
201 | { | |
202 | //if it is new, create or recreate there is no chance to find header in file | |
203 | fEvents = 0; | |
204 | } | |
205 | ||
206 | fLastEventSerialNr = -1; | |
207 | return kTRUE; | |
208 | } | |
209 | //_______________________________________________________________________ | |
210 | ||
211 | Bool_t AliStream::ImportgAlice() | |
212 | { | |
213 | // | |
214 | // Imports gAlice object from file | |
215 | // | |
216 | if (fFileNames->GetLast() < 0) return kFALSE; | |
217 | ||
218 | AliRunLoader* currentloader = AliRunLoader::GetRunLoader(fEventFolderName); | |
219 | if (!currentloader) | |
220 | { | |
221 | if (!OpenNextFile()) return kFALSE; | |
222 | currentloader = AliRunLoader::GetRunLoader(fEventFolderName); | |
223 | } | |
224 | currentloader->LoadgAlice(); | |
225 | gAlice = currentloader->GetAliRun(); | |
226 | if (!gAlice) return kFALSE; | |
227 | return kTRUE; | |
228 | } | |
229 | ||
230 | //_______________________________________________________________________ | |
231 | TString AliStream::GetFileName(Int_t order) const | |
232 | { | |
233 | // returns name of the order-th file | |
234 | // returns empty string if such file does not exist | |
235 | // first file in the input stream is 0 | |
236 | TString fileName(""); | |
237 | if (order > fFileNames->GetLast()) return fileName; | |
238 | TObjString *fileNameStored = dynamic_cast<TObjString*>(fFileNames->At(order)); | |
239 | if (fileNameStored) fileName = fileNameStored->GetString(); | |
240 | return fileName; | |
241 | } | |
242 |