54 {
55 TObjArray* branches = tree.GetListOfBranches();
56
57 if (branches->GetEntries() == 1) {
58 tree.SetBranchAddress(branches->First()->GetName(), &this->address);
59 return;
60 }
61
62
63 TClass* t_class = TClass::GetClass<T>();
64 if (t_class == nullptr) {
65 THROW(JException,
"Could not get class " <<
typeid(T).name());
66 }
67
68 auto branch_names =
to_vector(tree.GetListOfBranches());
69 auto all_member_names =
to_vector(t_class->GetListOfRealData());
70
72
73
74 std::copy_if(all_member_names.begin(), all_member_names.end(), std::back_inserter(member_names),
75 [](const std::string& member_name)
76 { return !JRoot::is_tobject_member(member_name.c_str()); });
77
78 std::sort(branch_names.begin(), branch_names.end());
79 std::sort(member_names.begin(), member_names.end());
80
81
82
83 if (std::includes(branch_names.begin(), branch_names.end(), member_names.begin(),
84 member_names.end())) {
85
87
88 auto* base =
reinterpret_cast<uint8_t*
>(this->
address);
89
90 for (const auto& member_name : member_names) {
91 auto* member = static_cast<TDataMember*>(t_class->GetDataMember(member_name.c_str()));
92 tree.SetBranchAddress(member_name.c_str(),
93 reinterpret_cast<void*>(base + member->GetOffset()));
94 }
95 return;
96 }
97
98
99
100 THROW(JException,
"Members of type " <<
typeid(T).name() <<
"\n"
101 <<
JEEP::JEEPZ() << member_names <<
"\nBranches in tree\n"
103 }
#define THROW(JException_t, A)
Marco for throwing exception with std::ostream compatible message.
std::vector< std::string > to_vector(TCollection *col)
Auxiliary data structure for streaming of STL containers.