| Geant4 Cross Reference |
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25 //
26
27 // Author: Ivana Hrivnacova, 09/04/2014 (ivana@ipno.in2p3.fr)
28
29 #include "G4RootRNtupleManager.hh"
30 #include "G4RootRFileManager.hh"
31 #include "G4AnalysisManagerState.hh"
32 #include "G4AnalysisUtilities.hh"
33
34 #include "tools/rroot/file"
35 #include "tools/rroot/rall"
36 #include "tools/rroot/streamers"
37 #include "tools/rroot/fac"
38 #include "tools/rroot/tree"
39
40 using namespace G4Analysis;
41
42 //_____________________________________________________________________________
43 G4RootRNtupleManager::G4RootRNtupleManager(const G4AnalysisManagerState& state)
44 : G4TRNtupleManager<tools::rroot::ntuple>(state)
45 {}
46
47 //
48 // private methods
49 //
50
51 //_____________________________________________________________________________
52 G4int G4RootRNtupleManager::ReadNtupleImpl(const G4String& ntupleName,
53 const G4String& fileName,
54 const G4String& dirName,
55 G4bool isUserFileName)
56 {
57 Message(kVL4, "read", "ntuple", ntupleName);
58
59 // Ntuples are saved per thread
60 // but do not apply the thread suffix if fileName is provided explicitly
61 auto isPerThread = true;
62 if ( isUserFileName ) isPerThread = false;
63
64 // Get or open a file
65 auto rfileTuple = fFileManager->GetRFile(fileName, isPerThread);
66 if (rfileTuple == nullptr) {
67 if ( ! fFileManager->OpenRFile(fileName, isPerThread) ) return kInvalidId;
68 rfileTuple = fFileManager->GetRFile(fileName, isPerThread);
69 }
70 auto rfile = std::get<0>(*rfileTuple);
71
72 // Get or open a directory if dirName is defined
73 tools::rroot::TDirectory* ntupleDirectory = nullptr;
74 if ( ntupleDirectory == nullptr ) {
75 // Retrieve directory only once as analysis manager supports only
76 // 1 ntuple directory par file)
77 if ( ! dirName.empty() ) {
78 ntupleDirectory = tools::rroot::find_dir(rfile->dir(), dirName);
79 if ( ntupleDirectory != nullptr ) {
80 std::get<2>(*rfileTuple) = ntupleDirectory;
81 }
82 else {
83 G4Analysis::Warn(
84 "Directory " + dirName + " not found in file " + fileName + ".",
85 fkClass, "ReadNtupleImpl");
86 return kInvalidId;
87 }
88 }
89 }
90
91 // Get key
92 tools::rroot::key* key = nullptr;
93 if ( ntupleDirectory != nullptr ) {
94 key = ntupleDirectory->find_key(ntupleName);
95 }
96 else {
97 key = rfile->dir().find_key(ntupleName);
98 }
99 if (key == nullptr) {
100 Warn("Key " + ntupleName + " for Ntuple not found in file " + fileName +
101 ", directory " + dirName, fkClass, "ReadNtupleImpl");
102 return kInvalidId;
103 }
104
105 unsigned int size;
106 char* charBuffer = key->get_object_buffer(*rfile, size);
107 if (charBuffer == nullptr) {
108 Warn("Cannot get data buffer for Ntuple " + ntupleName +
109 " in file " + fileName, fkClass, "ReadNtupleImpl");
110 return kInvalidId;
111 }
112
113 auto verbose = false;
114 auto buffer
115 = new tools::rroot::buffer(G4cout, rfile->byte_swap(), size, charBuffer,
116 key->key_length(), verbose);
117 buffer->set_map_objs(true);
118
119 auto fac = new tools::rroot::fac(G4cout);
120
121 auto tree = new tools::rroot::tree(*rfile, *fac);
122 if ( ! tree->stream(*buffer) ) {
123 Warn("TTree streaming failed for Ntuple " + ntupleName +
124 " in file " + fileName,
125 fkClass, "ReadNtupleImpl");
126
127 delete buffer;
128 delete tree;
129 return kInvalidId;
130 }
131
132 auto rntuple = new tools::rroot::ntuple(*tree); //use the flat ntuple API.
133 auto rntupleDescription = new G4TRNtupleDescription<tools::rroot::ntuple>(rntuple);
134
135 auto id = SetNtuple(rntupleDescription);
136
137
138 Message(kVL2, "read", "ntuple", ntupleName, id > kInvalidId);
139
140 return id;
141 }
142
143 //_____________________________________________________________________________
144 G4bool G4RootRNtupleManager::GetTNtupleRow(
145 G4TRNtupleDescription<tools::rroot::ntuple>* ntupleDescription)
146 {
147 auto ntuple = ntupleDescription->fNtuple;
148 auto ntupleBinding = ntupleDescription->fNtupleBinding;
149
150 G4bool isInitialized = ntupleDescription->fIsInitialized;
151 if ( ! isInitialized ) {
152
153 if ( ! ntuple->initialize(G4cout, *ntupleBinding) ) {
154 Warn("Ntuple initialization failed !!", fkClass, "GetTNtupleRow");
155 return false;
156 }
157 ntupleDescription->fIsInitialized = true;
158 ntuple->start();
159 }
160
161 auto next = ntuple->next();
162 if ( next ) {
163 if ( ! ntuple->get_row() ) {
164 Warn("Ntuple get_row() failed !!", fkClass, "GetTNtupleRow");
165 return false;
166 }
167 }
168
169 return next;
170 }
171