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