StringBranchHelper< Object, Collection > Class Template Reference

#include <StringBasedNTupler.h>

Public Types
typedef TreeBranch::value	value

Public Member Functions
value	operator() ()
	StringBranchHelper (const TreeBranch &B, const edm::Event &iEvent)

Private Attributes
value	value_

Detailed Description

template<typename Object, typename Collection = std::vector<Object>>
class StringBranchHelper< Object, Collection >

Definition at line 124 of file StringBasedNTupler.h.

Member Typedef Documentation

value

template<typename Object , typename Collection = std::vector<Object>>

typedef TreeBranch::value StringBranchHelper< Object, Collection >::value

Definition at line 126 of file StringBasedNTupler.h.

Constructor & Destructor Documentation

StringBranchHelper()

template<typename Object , typename Collection = std::vector<Object>>

StringBranchHelper< Object, Collection >::StringBranchHelper ( const TreeBranch &  B, const edm::Event &  iEvent  )

inline

Definition at line 129 of file StringBasedNTupler.h.

                                                                  {
    const float defaultValue = 0.;
 
    //    grab the collection
    edm::Handle<Collection> oH;
    iEvent.getByLabel(B.src(), oH);
 
    //empty vector if product not found
    if (oH.failedToGet()) {
      if (!(iEvent.isRealData() && B.className() == "reco::GenParticle")) {  //don't output genparticle error in data
        edm::LogError("StringBranchHelper") << "cannot open: " << B.src() << "  " << B.className();
      }
      value_ = std::make_unique<std::vector<float>>();
    } else {
      //parser for the object expression
      StringObjectFunction<Object> expr(B.expr());
      //allocate enough memory for the data holder
      value_ = std::make_unique<std::vector<float>>();
      value_->reserve(oH->size());
 
      StringCutObjectSelector<Object>* selection = nullptr;
      if (!B.selection().empty()) {
        //std::cout<<"trying to get to a selection"<<std::endl;
        selection = new StringCutObjectSelector<Object>(B.selection());
        //std::cout<<"got the objet"<<std::endl;
      }
      uint i_end = oH->size();
      //sort things first if requested
      if (!B.order().empty()) {
        StringObjectFunction<Object> order(B.order());
        // allocate a vector of pointers (we are using view) to be sorted
        std::vector<const Object*> copyToSort(oH->size());
        for (uint i = 0; i != i_end; ++i)
          copyToSort[i] = &(*oH)[i];
        std::sort(copyToSort.begin(), copyToSort.end(), sortByStringFunction<Object>(&order));
        //then loop and fill
        for (uint i = 0; i != i_end; ++i) {
          //try and catch is necessary because ...
          try {
            if (selection && !((*selection)(*(copyToSort)[i])))
              continue;
            value_->push_back((expr)(*(copyToSort)[i]));
          } catch (...) {
            LogDebug("StringBranchHelper")
                << "with sorting. could not evaluate expression: " << B.expr() << " on class: " << B.className();
            value_->push_back(defaultValue);  //push a default value to not change the indexing
          }
        }
      } else {
        //actually fill the vector of values
        for (uint i = 0; i != i_end; ++i) {
          //try and catch is necessary because ...
          try {
            if (selection && !((*selection)((*oH)[i])))
              continue;
            value_->push_back((expr)((*oH)[i]));
          } catch (...) {
            LogDebug("StringBranchHelper")
                << "could not evaluate expression: " << B.expr() << " on class: " << B.className();
            value_->push_back(defaultValue);  //push a default value to not change the indexing
          }
        }
      }
      if (selection)
        delete selection;
    }
  }

References TtFullHadDaughter::B, jets_cff::expr, edm::HandleBase::failedToGet(), mps_fire::i, iEvent, LogDebug, eventshapeDQM_cfi::order, corrVsCorr::selection, jetUpdater_cfi::sort, parallelization::uint, and StringBranchHelper< Object, Collection >::value_.

Member Function Documentation

operator()()

template<typename Object , typename Collection = std::vector<Object>>

value StringBranchHelper< Object, Collection >::operator() ( )

inline

Definition at line 127 of file StringBasedNTupler.h.

{ return std::move(value_); }

References eostools::move(), and StringBranchHelper< Object, Collection >::value_.

Member Data Documentation

value_

template<typename Object , typename Collection = std::vector<Object>>

value StringBranchHelper< Object, Collection >::value_

private

Definition at line 198 of file StringBasedNTupler.h.

Referenced by StringBranchHelper< Object, Collection >::operator()(), and StringBranchHelper< Object, Collection >::StringBranchHelper().