Classes
struct	BranchInfo
Typedefs
typedef std::map< BranchKey const, BranchInfo >	BranchMap
typedef Long64_t	EntryNumber
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

typedef std::map<BranchKey const, BranchInfo> edm::roottree::BranchMap

Definition at line 50 of file RootTree.h.

typedef Long64_t edm::roottree::EntryNumber

Definition at line 38 of file RootTree.h.

Function Documentation

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

Definition at line 273 of file RootTree.cc.

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

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

                                                       {
      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 285 of file RootTree.cc.

References alignCSCRings::e, Exception, edm::errors::FileReadError, and 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 297 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 (0 != 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(0);
      return treeCache;
    }