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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 | // Realisation of AliGenReader to be used with AliGenExtFile | |
19 | // It reads events from a kinematics TreeK. | |
20 | // NextEvent() is used to loop over events | |
21 | // and NextParticle() to loop over particles. | |
22 | // Author: andreas.morsch@cern.ch | |
23 | // | |
24 | #include <TFile.h> | |
25 | #include <TTree.h> | |
26 | #include <TParticle.h> | |
27 | #include <TObjString.h> | |
28 | #include <TObjArray.h> | |
29 | ||
30 | #include "AliGenReaderTreeK.h" | |
31 | #include "AliHeader.h" | |
32 | #include "AliRun.h" | |
33 | #include "AliRunLoader.h" | |
34 | ||
35 | ClassImp(AliGenReaderTreeK) | |
36 | ||
37 | const TString AliGenReaderTreeK::fgkEventFolderName("GenReaderTreeK"); | |
38 | ||
39 | AliGenReaderTreeK::AliGenReaderTreeK(): | |
40 | AliGenReader(), | |
41 | fNcurrent(0), | |
42 | fNparticle(0), | |
43 | fNp(0), | |
44 | fInRunLoader(0), | |
45 | fBaseFile(0), | |
46 | fStack(0), | |
47 | fOnlyPrimaries(kFALSE), | |
48 | fDirs(0x0), | |
49 | fCurrentDir(0) | |
50 | { | |
51 | // Default constructor | |
52 | } | |
53 | ||
54 | AliGenReaderTreeK::AliGenReaderTreeK(const AliGenReaderTreeK &reader): | |
55 | AliGenReader(reader), | |
56 | fNcurrent(0), | |
57 | fNparticle(0), | |
58 | fNp(0), | |
59 | fInRunLoader(0), | |
60 | fBaseFile(0), | |
61 | fStack(0), | |
62 | fOnlyPrimaries(kFALSE), | |
63 | fDirs(0x0), | |
64 | fCurrentDir(0) | |
65 | { | |
66 | reader.Copy(*this); | |
67 | } | |
68 | ||
69 | ||
70 | AliGenReaderTreeK::~AliGenReaderTreeK() | |
71 | { | |
72 | // Destructor | |
73 | delete fInRunLoader;//it cleans all the loaded data | |
74 | delete fDirs; | |
75 | } | |
76 | ||
77 | void AliGenReaderTreeK::Init() | |
78 | { | |
79 | // Initialization | |
80 | // Connect base file and file to read from | |
81 | ||
82 | TTree *ali = gAlice->TreeE(); | |
83 | if (ali) { | |
84 | fBaseFile = ali->GetCurrentFile(); | |
85 | } else { | |
86 | printf("\n Warning: Basefile cannot be found !\n"); | |
87 | } | |
88 | //if (!fFile) fFile = new TFile(fFileName); | |
89 | if (fInRunLoader == 0x0) | |
90 | { | |
91 | fInRunLoader = AliRunLoader::Open((GetDirName(fCurrentDir++)+"/")+fFileName,fgkEventFolderName); | |
92 | fInRunLoader->LoadHeader(); | |
93 | fInRunLoader->LoadKinematics("READ"); | |
94 | } | |
95 | } | |
96 | ||
97 | Int_t AliGenReaderTreeK::NextEvent() | |
98 | { | |
99 | // Read the next event | |
100 | // cd to file with old kine tree | |
101 | if (!fBaseFile) Init(); | |
102 | // Get next event | |
103 | ||
104 | if (fNcurrent >= fInRunLoader->GetNumberOfEvents()) | |
105 | { | |
106 | if (fCurrentDir >= fDirs->GetEntries()) | |
107 | { | |
108 | Warning("NextEvent","No more events"); | |
109 | return 0; | |
110 | } | |
111 | delete fInRunLoader; | |
112 | fInRunLoader = AliRunLoader::Open((GetDirName(fCurrentDir++)+"/")+fFileName,fgkEventFolderName); | |
113 | fInRunLoader->LoadHeader(); | |
114 | fInRunLoader->LoadKinematics("READ"); | |
115 | fNcurrent = 0; | |
116 | } | |
117 | fInRunLoader->GetEvent(fNcurrent); | |
118 | fStack = fInRunLoader->Stack(); | |
119 | ||
120 | // cd back to base file | |
121 | fBaseFile->cd(); | |
122 | // | |
123 | fNcurrent++; | |
124 | fNparticle = 0; | |
125 | fNp = fStack->GetNtrack(); | |
126 | printf("\n Next event contains %d particles", fNp); | |
127 | // | |
128 | return fNp; | |
129 | } | |
130 | ||
131 | TParticle* AliGenReaderTreeK::NextParticle() | |
132 | { | |
133 | //Return next particle | |
134 | TParticle* part = GetParticle(fNparticle++); | |
135 | if (part == 0x0) return 0x0; | |
136 | //if only primaries are to be read, and this particle is not primary enter loop | |
137 | if (fOnlyPrimaries && ( part->GetFirstMother() > -1) ) | |
138 | for (;;) | |
139 | { //look for a primary | |
140 | part = GetParticle(fNparticle++); | |
141 | if (part == 0x0) return 0x0; | |
142 | if (part->GetFirstMother() == -1) return part; | |
143 | } | |
144 | ||
145 | return part; | |
146 | } | |
147 | ||
148 | void AliGenReaderTreeK::RewindEvent() | |
149 | { | |
150 | // Go back to the first particle of the event | |
151 | fNparticle = 0; | |
152 | } | |
153 | ||
154 | ||
155 | AliGenReaderTreeK& AliGenReaderTreeK::operator=(const AliGenReaderTreeK& rhs) | |
156 | { | |
157 | // Assignment operator | |
158 | rhs.Copy(*this); | |
159 | return *this; | |
160 | } | |
161 | ||
162 | void AliGenReaderTreeK::Copy(TObject&) const | |
163 | { | |
164 | // | |
165 | // Copy | |
166 | // | |
167 | Fatal("Copy","Not implemented!\n"); | |
168 | } | |
169 | ||
170 | ||
171 | ||
172 | TString& AliGenReaderTreeK::GetDirName(Int_t entry) | |
173 | { | |
174 | // Get the current directory name | |
175 | ||
176 | TString* retval;//return value | |
177 | if (fDirs == 0x0) | |
178 | { | |
179 | retval = new TString("."); | |
180 | return *retval; | |
181 | } | |
182 | ||
183 | if ( (entry>fDirs->GetEntries()) || (entry<0))//if out of bounds return empty string | |
184 | { //note that entry==0 is accepted even if array is empty (size=0) | |
185 | Error("GetDirName","Name out of bounds"); | |
186 | retval = new TString(); | |
187 | return *retval; | |
188 | } | |
189 | ||
190 | if (fDirs->GetEntries() == 0) | |
191 | { | |
192 | retval = new TString("."); | |
193 | return *retval; | |
194 | } | |
195 | ||
196 | TObjString *dir = dynamic_cast<TObjString*>(fDirs->At(entry)); | |
197 | if(dir == 0x0) | |
198 | { | |
199 | Error("GetDirName","Object in TObjArray is not a TObjString or its descendant"); | |
200 | retval = new TString(); | |
201 | return *retval; | |
202 | } | |
203 | if (gDebug > 0) Info("GetDirName","Returned ok %s",dir->String().Data()); | |
204 | return dir->String(); | |
205 | } | |
206 | ||
207 | void AliGenReaderTreeK::AddDir(const char* dirname) | |
208 | { | |
209 | //adds a directory to the list of directories where data are looked for | |
210 | if(fDirs == 0x0) | |
211 | { | |
212 | fDirs = new TObjArray(); | |
213 | fDirs->SetOwner(kTRUE); | |
214 | } | |
215 | TObjString *odir= new TObjString(dirname); | |
216 | fDirs->Add(odir); | |
217 | } |