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