class TBranchRef: public TBranch
A branch containing and managing a TRefTable for TRef autoloading. It loads the TBranch containing a referenced object when requested by TRef::GetObject(), so the reference can be resolved. The information which branch to load is stored by TRefTable. Once a TBranch has read the TBranchRef's current entry it will not be told to re-read, in case the use has changed objects read from the branch. LIMITATION Note that this does NOT allow for autoloading of references spanning different entries. The TBranchRef's current entry has to correspond to the entry of the TBranch containing the referenced object. The TRef cannot be stored in a top-level branch which is a TBranchObject for the auto-loading to work. E.g. you cannot store the TRefs in TObjArray, and create a top-level branch storing this TObjArray.
Function Members (Methods)
public:
protected:
| virtual void | TObject::DoError(int level, const char* location, const char* fmt, va_list va) const |
| TBasket* | TBranch::GetFreshBasket() |
| TString | TBranch::GetRealFileName() const |
| void | TBranch::Init(const char* name, const char* leaflist, Int_t compress) |
| void | TObject::MakeZombie() |
| void | TBranch::ReadLeaves0Impl(TBuffer& b) |
| void | TBranch::ReadLeaves1Impl(TBuffer& b) |
| void | TBranch::ReadLeaves2Impl(TBuffer& b) |
| void | ReadLeavesImpl(TBuffer& b) |
| void | TBranch::SetSkipZip(Bool_t skip = kTRUE) |
| Int_t | TBranch::WriteBasket(TBasket* basket, Int_t where) |
Data Members
public:
| enum TBranch::EStatusBits { | kAutoDelete | |
| kDoNotUseBufferMap | ||
| }; | ||
| enum TObject::EStatusBits { | kCanDelete | |
| kMustCleanup | ||
| kObjInCanvas | ||
| kIsReferenced | ||
| kHasUUID | ||
| kCannotPick | ||
| kNoContextMenu | ||
| kInvalidObject | ||
| }; | ||
| enum TObject::[unnamed] { | kIsOnHeap | |
| kNotDeleted | ||
| kZombie | ||
| kBitMask | ||
| kSingleKey | ||
| kOverwrite | ||
| kWriteDelete | ||
| }; |
protected:
| char* | TBranch::fAddress | ! Address of 1st leaf (variable or object) |
| Int_t* | TBranch::fBasketBytes | [fMaxBaskets] Lenght of baskets on file |
| Long64_t* | TBranch::fBasketEntry | [fMaxBaskets] Table of first entry in eack basket |
| Long64_t* | TBranch::fBasketSeek | [fMaxBaskets] Addresses of baskets on file |
| Int_t | TBranch::fBasketSize | Initial Size of Basket Buffer |
| TObjArray | TBranch::fBaskets | -> List of baskets of this branch |
| TObjArray | TBranch::fBranches | -> List of Branches of this branch |
| TList* | TBranch::fBrowsables | ! List of TVirtualBranchBrowsables used for Browse() |
| Int_t | TBranch::fCompress | Compression level and algorithm |
| TBasket* | TBranch::fCurrentBasket | ! Pointer to the current basket. |
| TDirectory* | TBranch::fDirectory | ! Pointer to directory where this branch buffers are stored |
| Long64_t | TBranch::fEntries | Number of entries |
| TBuffer* | TBranch::fEntryBuffer | ! Buffer used to directly pass the content without streaming |
| Long64_t | TBranch::fEntryNumber | Current entry number (last one filled in this branch) |
| Int_t | TBranch::fEntryOffsetLen | Initial Length of fEntryOffset table in the basket buffers |
| TString | TBranch::fFileName | Name of file where buffers are stored ("" if in same file as Tree header) |
| Color_t | TAttFill::fFillColor | fill area color |
| Style_t | TAttFill::fFillStyle | fill area style |
| Long64_t | TBranch::fFirstBasketEntry | ! First entry in the current basket. |
| Long64_t | TBranch::fFirstEntry | Number of the first entry in this branch |
| TObjArray | TBranch::fLeaves | -> List of leaves of this branch |
| Int_t | TBranch::fMaxBaskets | Maximum number of Baskets so far |
| TBranch* | TBranch::fMother | ! Pointer to top-level parent branch in the tree. |
| Int_t | TBranch::fNBaskets | ! Number of baskets in memory |
| TString | TNamed::fName | object identifier |
| Long64_t | TBranch::fNextBasketEntry | ! Next entry that will requires us to go to the next basket |
| Int_t | TBranch::fNleaves | ! Number of leaves |
| Int_t | TBranch::fOffset | Offset of this branch |
| TBranch* | TBranch::fParent | ! Pointer to parent branch. |
| Int_t | TBranch::fReadBasket | ! Current basket number when reading |
| Long64_t | TBranch::fReadEntry | ! Current entry number when reading |
| G__p2memfunc | TBranch::fReadLeaves | ! Pointer to the ReadLeaves implementation to use. |
| TRefTable* | fRefTable | pointer to the TRefTable |
| Bool_t | TBranch::fSkipZip | ! After being read, the buffer will not be unziped. |
| Int_t | TBranch::fSplitLevel | Branch split level |
| TString | TNamed::fTitle | object title |
| Long64_t | TBranch::fTotBytes | Total number of bytes in all leaves before compression |
| TTree* | TBranch::fTree | ! Pointer to Tree header |
| Int_t | TBranch::fWriteBasket | Last basket number written |
| Long64_t | TBranch::fZipBytes | Total number of bytes in all leaves after compression |
| static Int_t | TBranch::fgCount | ! branch counter |
private:
| Long64_t | fRequestedEntry | ! Cursor indicating which entry is being requested. |
Class Charts
Function documentation
void ReadLeavesImpl(TBuffer& b)
void Reset(Option_t* option = "")
Existing buffers are deleted
Entries, max and min are reset
TRefTable is cleared.
Int_t SetParent(const TObject* obj, Int_t branchID)
-- Set the current parent branch. This function is called by TBranchElement::GetEntry() and TBranchElement::Fill() when reading or writing branches that may contain referenced objects.