Classes
struct	BranchInfo

class	BranchMap

Typedefs
using	EntryNumber = IndexIntoFile::EntryNumber_t

Functions
Int_t	getEntry (TBranch *branch, EntryNumber entryNumber)

Int_t	getEntry (TTree *tree, EntryNumber entryNumber)

std::unique_ptr< TTreeCache >	trainCache (TTree tree, InputFile &file, unsigned int cacheSize, char const branchNames)

Variables
unsigned int const	defaultCacheSize = 20U * 1024 * 1024

unsigned int const	defaultLearningEntries = 20U

unsigned int const	defaultNonEventCacheSize = 1U * 1024 * 1024

unsigned int const	defaultNonEventLearningEntries = 1U

Typedef Documentation

using edm::roottree::EntryNumber = typedef IndexIntoFile::EntryNumber_t

Definition at line 42 of file RootTree.h.

Function Documentation

Int_t edm::roottree::getEntry	(	TBranch *	branch,
		EntryNumber	entryNumber
	)

Definition at line 515 of file RootTree.cc.

References alignCSCRings::e, Exception, edm::errors::FileReadError, and dqmiodumpmetadata::n.

Referenced by edm::RootTree::fillBranchEntryMeta(), edm::RootFile::fillEventHistory(), edm::RootFile::readEntryDescriptionTree(), edm::RootFile::readParentageTree(), edm::OldProvenanceReader::readProvenance(), edm::RootFile::RootFile(), and CaloSD::update().

                                                              {
       Int_t n = 0;
       try {
         n = branch->GetEntry(entryNumber);
       } catch (cms::Exception const& e) {
         throw Exception(errors::FileReadError, "", e);
       }
       return n;
     }

Int_t edm::roottree::getEntry	(	TTree *	tree,
		EntryNumber	entryNumber
	)

Definition at line 525 of file RootTree.cc.

References alignCSCRings::e, Exception, edm::errors::FileReadError, and dqmiodumpmetadata::n.

                                                          {
       Int_t n = 0;
       try {
         n = tree->GetEntry(entryNumber);
       } catch (cms::Exception const& e) {
         throw Exception(errors::FileReadError, "", e);
       }
       return n;
     }

std::unique_ptr< TTreeCache > edm::roottree::trainCache	(	TTree *	tree,
		InputFile &	file,
		unsigned int	cacheSize,
		char const *	branchNames
	)

Definition at line 535 of file RootTree.cc.

References edm::InputFile::GetCacheRead(), and edm::InputFile::SetCacheRead().

Referenced by edm::RootFile::RootFile().

                                                                     {
       tree->LoadTree(0);
       tree->SetCacheSize(cacheSize);
       std::unique_ptr<TTreeCache> treeCache(dynamic_cast<TTreeCache*>(file.GetCacheRead()));
       if (nullptr != treeCache.get()) {
         treeCache->StartLearningPhase();
         treeCache->SetEntryRange(0, tree->GetEntries());
         treeCache->AddBranch(branchNames, kTRUE);
         treeCache->StopLearningPhase();
       }
       // We own the treeCache_.
       // We make sure the treeCache_ is detached from the file,
       // so that ROOT does not also delete it.
       file.SetCacheRead(nullptr);
       return treeCache;
     }