#include <RootDelayedReader.h>

Inheritance diagram for edm::RootDelayedReader:

Public Types
typedef roottree::BranchInfo	BranchInfo
typedef roottree::BranchMap	BranchMap
typedef roottree::EntryNumber	EntryNumber
typedef roottree::BranchMap::const_iterator	iterator
Public Member Functions
	RootDelayedReader (EntryNumber const &entry, boost::shared_ptr< BranchMap const > bMap, RootTree const &tree, FileFormatVersion const &fileFormatVersion, boost::shared_ptr< RootFile > filePtr)
virtual	~RootDelayedReader ()
Private Member Functions
BranchMap const &	branches () const
iterator	branchIter (BranchKey const &k) const
bool	found (iterator const &iter) const
BranchInfo const &	getBranchInfo (iterator const &iter) const
virtual std::auto_ptr< EDProduct >	getProduct_ (BranchKey const &k, EDProductGetter const *ep) const
virtual void	mergeReaders_ (boost::shared_ptr< DelayedReader > other)
Private Attributes
boost::shared_ptr< BranchMap const >	branches_
EntryNumber const	entryNumber_
FileFormatVersion	fileFormatVersion_
boost::shared_ptr< RootFile >	filePtr_
boost::shared_ptr< DelayedReader >	nextReader_
RootTree const &	tree_

Detailed Description

Definition at line 30 of file RootDelayedReader.h.

Member Typedef Documentation

typedef roottree::BranchInfo edm::RootDelayedReader::BranchInfo

Definition at line 32 of file RootDelayedReader.h.

typedef roottree::BranchMap edm::RootDelayedReader::BranchMap

Definition at line 33 of file RootDelayedReader.h.

typedef roottree::EntryNumber edm::RootDelayedReader::EntryNumber

Definition at line 35 of file RootDelayedReader.h.

typedef roottree::BranchMap::const_iterator edm::RootDelayedReader::iterator

Definition at line 34 of file RootDelayedReader.h.

Constructor & Destructor Documentation

data doxygen doxygen gen CMSSW_4_2_8 src IOPool Input src RootDelayedReader cc edm::RootDelayedReader::RootDelayedReader	(	EntryNumber const &	entry,
		boost::shared_ptr< BranchMap const >	bMap,
		RootTree const &	tree,
		FileFormatVersion const &	fileFormatVersion,
		boost::shared_ptr< RootFile >	filePtr
	)

Definition at line 15 of file RootDelayedReader.cc.

                                         :
   entryNumber_(entry),
   branches_(bMap),
   tree_(tree),
   filePtr_(filePtr),
   nextReader_(),
   fileFormatVersion_(fileFormatVersion) {}

edm::RootDelayedReader::~RootDelayedReader ( ) [virtual]

Definition at line 27 of file RootDelayedReader.cc.

Member Function Documentation

BranchMap const& edm::RootDelayedReader::branches ( ) const [inline, private]

Definition at line 47 of file RootDelayedReader.h.

References branches_.

Referenced by branchIter(), and found().

{return *branches_;}

iterator edm::RootDelayedReader::branchIter ( BranchKey const & k ) const [inline, private]

Definition at line 48 of file RootDelayedReader.h.

References branches().

{return branches().find(k);}

bool edm::RootDelayedReader::found ( iterator const & iter ) const [inline, private]

Definition at line 49 of file RootDelayedReader.h.

References branches().

{return iter != branches().end();}

BranchInfo const& edm::RootDelayedReader::getBranchInfo ( iterator const & iter ) const [inline, private]

Definition at line 50 of file RootDelayedReader.h.

{return iter->second; }

std::auto_ptr< EDProduct > edm::RootDelayedReader::getProduct_	(	BranchKey const &	k,
		EDProductGetter const *	ep
	)		const `[private, virtual]`

Implements edm::DelayedReader.

Definition at line 30 of file RootDelayedReader.cc.

                      {
      if (nextReader_) {
        return nextReader_->getProduct(k, ep);
      } else {
        return std::auto_ptr<EDProduct>();
      }
    }
    roottree::BranchInfo const& branchInfo = getBranchInfo(iter);
    TBranch *br = branchInfo.productBranch_;
    if (br == 0) {
      if (nextReader_) {
        return nextReader_->getProduct(k, ep);
      } else {
        return std::auto_ptr<EDProduct>();
      }
    }
    setRefCoreStreamer(ep, !fileFormatVersion_.splitProductIDs(), !fileFormatVersion_.productIDIsInt());
    TClass *cp = branchInfo.classCache_;
    if(0 == cp) {
      branchInfo.classCache_ = gROOT->GetClass(branchInfo.branchDescription_.wrappedName().c_str());
      cp = branchInfo.classCache_;
      TClass *edProductClass = gROOT->GetClass("edm::EDProduct");
      branchInfo.offsetToEDProduct_ = edProductClass->GetBaseClassOffset(edProductClass);
    }
    void *p = cp->New();

    // A union is used to avoid possible copies during the triple cast that would otherwise be needed.
    //std::auto_ptr<EDProduct> edp(static_cast<EDProduct *>(static_cast<void *>(static_cast<unsigned char *>(p) + branchInfo.offsetToEDProduct_)));
    union {
      void* vp;
      unsigned char* ucp;
      EDProduct* edp;
    } pointerUnion;
    pointerUnion.vp = p;
    pointerUnion.ucp += branchInfo.offsetToEDProduct_;
    std::auto_ptr<EDProduct> edp(pointerUnion.edp);

    br->SetAddress(&p);
    tree_.getEntry(br, entryNumber_);
    setRefCoreStreamer(!fileFormatVersion_.splitProductIDs());
    return edp;
  }
}