NanoAOD/plugins/LumiOutputBranches.cc

0001 #include "PhysicsTools/NanoAOD/plugins/LumiOutputBranches.h"
0002
0003 #include <iostream>
0004
0005 namespace {
0006   std::string makeBranchName(const std::string &baseName, const std::string &leafName) {
0007     return baseName.empty() ? leafName : (leafName.empty() ? baseName : baseName + "_" + leafName);
0008   }
0009 }  // namespace
0010
0011 void LumiOutputBranches::defineBranchesFromFirstEvent(const nanoaod::FlatTable &tab) {
0012   m_baseName = tab.name();
0013   for (size_t i = 0; i < tab.nColumns(); i++) {
0014     const std::string &var = tab.columnName(i);
0015     switch (tab.columnType(i)) {
0016       case nanoaod::FlatTable::ColumnType::Float:
0017         m_floatBranches.emplace_back(var, tab.columnDoc(i), "F");
0018         break;
0019       case nanoaod::FlatTable::ColumnType::Int32:
0020         m_intBranches.emplace_back(var, tab.columnDoc(i), "I");
0021         break;
0022       case nanoaod::FlatTable::ColumnType::UInt8:
0023         m_uint8Branches.emplace_back(var, tab.columnDoc(i), "b");
0024         break;
0025       case nanoaod::FlatTable::ColumnType::Bool:
0026         m_uint8Branches.emplace_back(var, tab.columnDoc(i), "O");
0027         break;
0028       default:
0029         throw cms::Exception("LogicError", "Unsupported type");
0030     }
0031   }
0032 }
0033
0034 void LumiOutputBranches::branch(TTree &tree) {
0035   if (!m_singleton) {
0036     if (m_extension == IsExtension) {
0037       m_counterBranch = tree.FindBranch(("n" + m_baseName).c_str());
0038       if (!m_counterBranch) {
0039         throw cms::Exception("LogicError",
0040                              "Trying to save an extension table for " + m_baseName +
0041                                  " before having saved the corresponding main table\n");
0042       }
0043     } else {
0044       if (tree.FindBranch(("n" + m_baseName).c_str()) != nullptr) {
0045         throw cms::Exception("LogicError", "Trying to save multiple main tables for " + m_baseName + "\n");
0046       }
0047       m_counterBranch = tree.Branch(("n" + m_baseName).c_str(), &m_counter, ("n" + m_baseName + "/I").c_str());
0048       m_counterBranch->SetTitle(m_doc.c_str());
0049     }
0050   }
0051   std::string varsize = m_singleton ? "" : "[n" + m_baseName + "]";
0052   for (std::vector<NamedBranchPtr> *branches : {&m_floatBranches, &m_intBranches, &m_uint8Branches}) {
0053     for (auto &pair : *branches) {
0054       std::string branchName = makeBranchName(m_baseName, pair.name);
0055       pair.branch =
0056           tree.Branch(branchName.c_str(), (void *)nullptr, (branchName + varsize + "/" + pair.rootTypeCode).c_str());
0057       pair.branch->SetTitle(pair.title.c_str());
0058     }
0059   }
0060 }
0061
0062 void LumiOutputBranches::fill(const edm::LuminosityBlockForOutput &iLumi, TTree &tree, bool extensions) {
0063   if (m_extension != DontKnowYetIfMainOrExtension) {
0064     if (extensions != m_extension)
0065       return;  // do nothing, wait to be called with the proper flag
0066   }
0067
0068   edm::Handle<nanoaod::FlatTable> handle;
0069   iLumi.getByToken(m_token, handle);
0070   const nanoaod::FlatTable &tab = *handle;
0071   auto size = tab.size();
0072   // ROOT native array size branches may only be signed integers,
0073   // until this is changed we need to make sure the vector sizes do not exceed that
0074   if (size > std::numeric_limits<CounterType>::max()) {
0075     throw cms::Exception("Table " + tab.name() + " size is " + std::to_string(size) +
0076                          ", is too large for ROOT native array branch");
0077   }
0078   m_counter = size;
0079   m_singleton = tab.singleton();
0080   if (!m_branchesBooked) {
0081     m_extension = tab.extension() ? IsExtension : IsMain;
0082     if (extensions != m_extension)
0083       return;  // do nothing, wait to be called with the proper flag
0084     defineBranchesFromFirstEvent(tab);
0085     m_doc = tab.doc();
0086     m_branchesBooked = true;
0087     branch(tree);
0088   }
0089   if (!m_singleton && m_extension == IsExtension) {
0090     if (m_counter != *reinterpret_cast<CounterType *>(m_counterBranch->GetAddress())) {
0091       throw cms::Exception("LogicError",
0092                            "Mismatch in number of entries between extension and main table for " + tab.name());
0093     }
0094   }
0095   for (auto &pair : m_floatBranches)
0096     fillColumn<float>(pair, tab);
0097   for (auto &pair : m_intBranches)
0098     fillColumn<int>(pair, tab);
0099   for (auto &pair : m_uint8Branches)
0100     fillColumn<uint8_t>(pair, tab);
0101 }