TBranchRef Class Reference

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.

Definition at line 34 of file TBranchRef.h.

Public Member Functions
	TBranchRef ()
	Default constructor.
	TBranchRef (TTree *tree)
	Main constructor called by TTree::BranchRef.
virtual	~TBranchRef ()
	Typical destructor.
virtual void	Clear (Option_t *option="")
	Clear entries in the TRefTable.
TRefTable *	GetRefTable () const
virtual Bool_t	Notify ()
	This function is called by TRefTable::Notify, itself called by TRef::GetObject.
virtual void	Print (Option_t *option="") const
	Print the TRefTable branch.
virtual void	Reset (Option_t *option="")
virtual void	ResetAfterMerge (TFileMergeInfo *)
	Reset a Branch after a Merge operation (drop data but keep customizations) TRefTable is cleared.
virtual Int_t	SetParent (const TObject *obj, Int_t branchID)
	Set the current parent branch.
virtual void	SetRequestedEntry (Long64_t entry)
Public Member Functions inherited from TBranch
	TBranch ()
	Default constructor. Used for I/O by default.
	TBranch (TBranch *parent, const char *name, void *address, const char *leaflist, Int_t basketsize=32000, Int_t compress=ROOT::RCompressionSetting::EAlgorithm::kInherit)
	Create a Branch as a child of another Branch.
	TBranch (TTree *tree, const char *name, void *address, const char *leaflist, Int_t basketsize=32000, Int_t compress=ROOT::RCompressionSetting::EAlgorithm::kInherit)
	Create a Branch as a child of a Tree.
virtual	~TBranch ()
	Destructor.
virtual void	AddBasket (TBasket &b, Bool_t ondisk, Long64_t startEntry)
	Add the basket to this branch.
virtual void	AddLastBasket (Long64_t startEntry)
	Add the start entry of the write basket (not yet created)
Int_t	BackFill ()
	Loop on all leaves of this branch to back fill Basket buffer.
virtual void	Browse (TBrowser *b)
	Browser interface.
virtual void	DeleteBaskets (Option_t *option="")
	Loop on all branch baskets.
virtual void	DropBaskets (Option_t *option="")
	Loop on all branch baskets.
void	ExpandBasketArrays ()
	Increase BasketEntry buffer of a minimum of 10 locations and a maximum of 50 per cent of current size.
Int_t	Fill ()
virtual TBranch *	FindBranch (const char *name)
	Find the immediate sub-branch with passed name.
virtual TLeaf *	FindLeaf (const char *name)
	Find the leaf corresponding to the name 'searchname'.
Int_t	FlushBaskets ()
	Flush to disk all the baskets of this branch and any of subbranches.
Int_t	FlushOneBasket (UInt_t which)
	If we have a write basket in memory and it contains some entries and has not yet been written to disk, we write it and delete it from memory.
virtual char *	GetAddress () const
TBasket *	GetBasket (Int_t basket)
Int_t *	GetBasketBytes () const
Long64_t *	GetBasketEntry () const
virtual Long64_t	GetBasketSeek (Int_t basket) const
	Return address of basket in the file.
virtual Int_t	GetBasketSize () const
virtual TList *	GetBrowsables ()
	Returns (and, if 0, creates) browsable objects for this branch See TVirtualBranchBrowsable::FillListOfBrowsables.
ROOT::Experimental::Internal::TBulkBranchRead &	GetBulkRead ()
virtual const char *	GetClassName () const
	Return the name of the user class whose content is stored in this branch, if any.
Int_t	GetCompressionAlgorithm () const
Int_t	GetCompressionLevel () const
Int_t	GetCompressionSettings () const
TDirectory *	GetDirectory () const
Long64_t	GetEntries () const
virtual Int_t	GetEntry (Long64_t entry=0, Int_t getall=0)
	Read all leaves of entry and return total number of bytes read.
virtual Int_t	GetEntryExport (Long64_t entry, Int_t getall, TClonesArray *list, Int_t n)
	Read all leaves of an entry and export buffers to real objects in a TClonesArray list.
Long64_t	GetEntryNumber () const
Int_t	GetEntryOffsetLen () const
Int_t	GetEvent (Long64_t entry=0)
virtual Int_t	GetExpectedType (TClass *&clptr, EDataType &type)
	Fill expectedClass and expectedType with information on the data type of the object/values contained in this branch (and thus the type of pointers expected to be passed to Set[Branch]Address return 0 in case of success and > 0 in case of failure.
virtual TFile *	GetFile (Int_t mode=0)
	Return pointer to the file where branch buffers reside, returns 0 in case branch buffers reside in the same file as tree header.
const char *	GetFileName () const
Long64_t	GetFirstEntry () const
virtual TString	GetFullName () const
	Return the 'full' name of the branch.
const char *	GetIconName () const
	Return icon name depending on type of branch.
TIOFeatures	GetIOFeatures () const
	Returns the IO settings currently in use for this branch.
virtual TLeaf *	GetLeaf (const char *name) const
	Return pointer to the 1st Leaf named name in thisBranch.
TObjArray *	GetListOfBaskets ()
TObjArray *	GetListOfBranches ()
TObjArray *	GetListOfLeaves ()
virtual Bool_t	GetMakeClass () const
	Return whether this branch is in a mode where the object are decomposed or not (Also known as MakeClass mode).
Int_t	GetMaxBaskets () const
TBranch *	GetMother () const
	Get our top-level parent branch in the tree.
Int_t	GetNleaves () const
Int_t	GetOffset () const
Int_t	GetReadBasket () const
Long64_t	GetReadEntry () const
virtual Int_t	GetRow (Int_t row)
	Return all elements of one row unpacked in internal array fValues [Actually just returns 1 (?)].
Int_t	GetSplitLevel () const
TBranch *	GetSubBranch (const TBranch *br) const
	Find the parent branch of child.
Long64_t	GetTotalSize (Option_t *option="") const
	Return total number of bytes in the branch (including current buffer)
Long64_t	GetTotBytes (Option_t *option="") const
	Return total number of bytes in the branch (excluding current buffer) if option ="*" includes all sub-branches of this branch too.
TBuffer *	GetTransientBuffer (Int_t size)
	Returns the transient buffer currently used by this TBranch for reading/writing baskets.
TTree *	GetTree () const
Int_t	GetWriteBasket () const
Long64_t	GetZipBytes (Option_t *option="") const
	Return total number of zip bytes in the branch if option ="*" includes all sub-branches of this branch too.
Bool_t	IsAutoDelete () const
	Return kTRUE if an existing object in a TBranchObject must be deleted.
Bool_t	IsFolder () const
	Return kTRUE if more than one leaf or browsables, kFALSE otherwise.
virtual void	KeepCircular (Long64_t maxEntries)
	keep a maximum of fMaxEntries in memory
virtual Int_t	LoadBaskets ()
	Baskets associated to this branch are forced to be in memory.
void	PrintCacheInfo () const
	Print the information we have about which basket is currently cached and whether they have been 'used'/'read' from the cache.
virtual void	ReadBasket (TBuffer &b)
	Loop on all leaves of this branch to read Basket buffer.
virtual void	Refresh (TBranch *b)
	Refresh this branch using new information in b This function is called by TTree::Refresh.
virtual void	ResetAddress ()
	Reset the address of the branch.
virtual void	ResetReadEntry ()
virtual void	SetAddress (void *add)
	Set address of this branch.
virtual void	SetAutoDelete (Bool_t autodel=kTRUE)
	Set the automatic delete bit.
virtual void	SetBasketSize (Int_t buffsize)
	Set the basket size The function makes sure that the basket size is greater than fEntryOffsetlen.
virtual void	SetBufferAddress (TBuffer *entryBuffer)
	Set address of this branch directly from a TBuffer to avoid streaming.
void	SetCompressionAlgorithm (Int_t algorithm=ROOT::RCompressionSetting::EAlgorithm::kUseGlobal)
	Set compression algorithm.
void	SetCompressionLevel (Int_t level=ROOT::RCompressionSetting::ELevel::kUseMin)
	Set compression level.
void	SetCompressionSettings (Int_t settings=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault)
	Set compression settings.
virtual void	SetEntries (Long64_t entries)
	Set the number of entries in this branch.
virtual void	SetEntryOffsetLen (Int_t len, Bool_t updateSubBranches=kFALSE)
	Update the default value for the branch's fEntryOffsetLen if and only if it was already non zero (and the new value is not zero) If updateExisting is true, also update all the existing branches.
virtual void	SetFile (const char *filename)
	Set file where this branch writes/reads its buffers.
virtual void	SetFile (TFile *file=0)
	Set file where this branch writes/reads its buffers.
virtual void	SetFirstEntry (Long64_t entry)
	set the first entry number (case of TBranchSTL)
void	SetIOFeatures (TIOFeatures &features)
virtual Bool_t	SetMakeClass (Bool_t decomposeObj=kTRUE)
	Set the branch in a mode where the object are decomposed (Also known as MakeClass mode).
virtual void	SetObject (void *objadd)
	Set object this branch is pointing to.
virtual void	SetOffset (Int_t offset=0)
virtual void	SetStatus (Bool_t status=1)
	Set branch status to Process or DoNotProcess.
virtual void	SetTree (TTree *tree)
virtual void	SetupAddresses ()
	If the branch address is not set, we set all addresses starting with the top level parent branch.
Bool_t	SupportsBulkRead () const
	Returns true if this branch supports bulk IO, false otherwise.
virtual void	UpdateAddress ()
virtual void	UpdateFile ()
	Refresh the value of fDirectory (i.e.
Public Member Functions inherited from TNamed
	TNamed ()
	TNamed (const char *name, const char *title)
	TNamed (const TNamed &named)
	TNamed copy ctor.
	TNamed (const TString &name, const TString &title)
virtual	~TNamed ()
	TNamed destructor.
virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility.
virtual Int_t	Compare (const TObject *obj) const
	Compare two TNamed objects.
virtual void	Copy (TObject &named) const
	Copy this to obj.
virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer.
virtual const char *	GetName () const
	Returns name of object.
virtual const char *	GetTitle () const
	Returns title of object.
virtual ULong_t	Hash () const
	Return hash value for this object.
virtual Bool_t	IsSortable () const
virtual void	ls (Option_t *option="") const
	List TNamed name and title.
TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator.
virtual void	SetName (const char *name)
	Set the name of the TNamed.
virtual void	SetNameTitle (const char *name, const char *title)
	Set all the TNamed parameters (name and title).
virtual void	SetTitle (const char *title="")
	Set the title of the TNamed.
virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject.
Public Member Functions inherited from TObject
	TObject ()
	TObject constructor.
	TObject (const TObject &object)
	TObject copy ctor.
virtual	~TObject ()
	TObject destructor.
void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract.
virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad.
ULong_t	CheckedHash ()
	Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.
virtual const char *	ClassName () const
	Returns name of class to which the object belongs.
virtual void	Delete (Option_t *option="")
	Delete this object.
virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object.
virtual void	Draw (Option_t *option="")
	Default Draw method for all objects.
virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs.
virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad).
virtual void	Dump () const
	Dump contents of object on stdout.
virtual void	Error (const char *method, const char *msgfmt,...) const
	Issue error message.
virtual void	Execute (const char *method, const char *params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g.
virtual void	Execute (TMethod *method, TObjArray *params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray.
virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py).
virtual void	Fatal (const char *method, const char *msgfmt,...) const
	Issue fatal error message.
virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes.
virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes.
virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object.
virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py).
virtual Option_t *	GetOption () const
virtual UInt_t	GetUniqueID () const
	Return the unique object id.
virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out.
Bool_t	HasInconsistentHash () const
	Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.
virtual void	Info (const char *method, const char *msgfmt,...) const
	Issue info message.
virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname".
virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl.
virtual void	Inspect () const
	Dump contents of this object in a graphics canvas.
void	InvertBit (UInt_t f)
virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory).
R__ALWAYS_INLINE Bool_t	IsOnHeap () const
R__ALWAYS_INLINE Bool_t	IsZombie () const
void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).
void	Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete.
void	operator delete (void *ptr)
	Operator delete.
void	operator delete[] (void *ptr)
	Operator delete [].
void *	operator new (size_t sz)
void *	operator new (size_t sz, void *vp)
void *	operator new[] (size_t sz)
void *	operator new[] (size_t sz, void *vp)
TObject &	operator= (const TObject &rhs)
	TObject assignment operator.
virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself.
virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list.
virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory.
virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list.
void	ResetBit (UInt_t f)
virtual void	SaveAs (const char *filename="", Option_t *option="") const
	Save this object in the file specified by filename.
virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out".
void	SetBit (UInt_t f)
void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f.
virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object.
virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id.
virtual void	SysError (const char *method, const char *msgfmt,...) const
	Issue system error message.
R__ALWAYS_INLINE Bool_t	TestBit (UInt_t f) const
Int_t	TestBits (UInt_t f) const
virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.
virtual void	Warning (const char *method, const char *msgfmt,...) const
	Issue warning message.
virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.
virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory.
Public Member Functions inherited from TAttFill
	TAttFill ()
	AttFill default constructor.
	TAttFill (Color_t fcolor, Style_t fstyle)
	AttFill normal constructor.
virtual	~TAttFill ()
	AttFill destructor.
void	Copy (TAttFill &attfill) const
	Copy this fill attributes to a new TAttFill.
virtual Color_t	GetFillColor () const
	Return the fill area color.
virtual Style_t	GetFillStyle () const
	Return the fill area style.
virtual Bool_t	IsTransparent () const
virtual void	Modify ()
	Change current fill area attributes if necessary.
virtual void	ResetAttFill (Option_t *option="")
	Reset this fill attributes to default values.
virtual void	SaveFillAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1001)
	Save fill attributes as C++ statement(s) on output stream out.
virtual void	SetFillAttributes ()
	Invoke the DialogCanvas Fill attributes.
virtual void	SetFillColor (Color_t fcolor)
	Set the fill area color.
virtual void	SetFillColorAlpha (Color_t fcolor, Float_t falpha)
	Set a transparent fill color.
virtual void	SetFillStyle (Style_t fstyle)
	Set the fill area style.

Protected Member Functions
void	FillLeavesImpl (TBuffer &b)
	This function called by TBranch::Fill overloads TBranch::FillLeaves.
void	ReadLeavesImpl (TBuffer &b)
	This function called by TBranch::GetEntry overloads TBranch::ReadLeaves.
Protected Member Functions inherited from TBranch
void	FillLeavesImpl (TBuffer &b)
	Loop on all leaves of this branch to fill Basket buffer.
TBasket *	GetFreshBasket (Int_t basketnumber, TBuffer *user_buffer)
	Return a fresh basket by either reusing an existing basket that needs to be drop (according to TTree::MemoryFull) or create a new one.
TBasket *	GetFreshCluster (TBuffer *user_buffer)
	Drops the cluster two behind the current cluster and returns a fresh basket by either reusing or creating a new one.
TString	GetRealFileName () const
	Get real file name.
void	Init (const char *name, const char *leaflist, Int_t compress)
void	ReadLeaves0Impl (TBuffer &b)
	Read zero leaves without the overhead of a loop.
void	ReadLeaves1Impl (TBuffer &b)
	Read one leaf without the overhead of a loop.
void	ReadLeaves2Impl (TBuffer &b)
	Read two leaves without the overhead of a loop.
void	ReadLeavesImpl (TBuffer &b)
	Loop on all leaves of this branch to read Basket buffer.
virtual void	SetAddressImpl (void *addr, Bool_t)
void	SetSkipZip (Bool_t skip=kTRUE)
Int_t	WriteBasket (TBasket *basket, Int_t where)
Protected Member Functions inherited from TObject
virtual void	DoError (int level, const char *location, const char *fmt, va_list va) const
	Interface to ErrorHandler (protected).
void	MakeZombie ()

Protected Attributes
TRefTable *	fRefTable
	pointer to the TRefTable
Protected Attributes inherited from TBranch
char *	fAddress
	! Address of 1st leaf (variable or object)
Int_t *	fBasketBytes
	[fMaxBaskets] Length of baskets on file
Long64_t *	fBasketEntry
	[fMaxBaskets] Table of first entry in each basket
TObjArray	fBaskets
	-> List of baskets of this branch
Long64_t *	fBasketSeek
	[fMaxBaskets] Addresses of baskets on file
Int_t	fBasketSize
	Initial Size of Basket Buffer.
TObjArray	fBranches
	-> List of Branches of this branch
TList *	fBrowsables
	! List of TVirtualBranchBrowsables used for Browse()
BulkObj	fBulk
	! Helper for performing bulk IO
CacheInfo_t	fCacheInfo
	! Hold info about which basket are in the cache and if they have been retrieved from the cache.
Int_t	fCompress
	Compression level and algorithm.
TBasket *	fCurrentBasket
	! Pointer to the current basket.
TDirectory *	fDirectory
	! Pointer to directory where this branch buffers are stored
Long64_t	fEntries
	Number of entries.
TBuffer *	fEntryBuffer
	! Buffer used to directly pass the content without streaming
Long64_t	fEntryNumber
	Current entry number (last one filled in this branch)
Int_t	fEntryOffsetLen
	Initial Length of fEntryOffset table in the basket buffers.
TBasket *	fExtraBasket
	! Allocated basket not currently holding any data.
TString	fFileName
	Name of file where buffers are stored ("" if in same file as Tree header)
FillLeaves_t	fFillLeaves
	! Pointer to the FillLeaves implementation to use.
Long64_t	fFirstBasketEntry
	! First entry in the current basket.
Long64_t	fFirstEntry
	Number of the first entry in this branch.
TIOFeatures	fIOFeatures
	IO features for newly-created baskets.
TObjArray	fLeaves
	-> List of leaves of this branch
Int_t	fMaxBaskets
	Maximum number of Baskets so far.
TBranch *	fMother
	! Pointer to top-level parent branch in the tree.
Int_t	fNBaskets
	! Number of baskets in memory
Long64_t	fNextBasketEntry
	! Next entry that will requires us to go to the next basket
Int_t	fNleaves
	! Number of leaves
Int_t	fOffset
	Offset of this branch.
TBranch *	fParent
	! Pointer to parent branch.
Int_t	fReadBasket
	! Current basket number when reading
Long64_t	fReadEntry
	! Current entry number when reading
ReadLeaves_t	fReadLeaves
	! Pointer to the ReadLeaves implementation to use.
Bool_t	fSkipZip
	! After being read, the buffer will not be unzipped.
Int_t	fSplitLevel
	Branch split level.
Long64_t	fTotBytes
	Total number of bytes in all leaves before compression.
TBuffer *	fTransientBuffer
	! Pointer to the current transient buffer.
TTree *	fTree
	! Pointer to Tree header
Int_t	fWriteBasket
	Last basket number written.
Long64_t	fZipBytes
	Total number of bytes in all leaves after compression.
Protected Attributes inherited from TNamed
TString	fName
TString	fTitle
Protected Attributes inherited from TAttFill
Color_t	fFillColor
	Fill area color.
Style_t	fFillStyle
	Fill area style.

Private Member Functions
virtual Int_t	FillImpl (ROOT::Internal::TBranchIMTHelper *)
	Fill the branch basket with the referenced objects parent numbers.

Private Attributes
Long64_t	fRequestedEntry
	! Cursor indicating which entry is being requested.

Additional Inherited Members
Public Types inherited from TObject
enum	{   kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 ,   kBitMask = 0x00ffffff }
enum	{ kSingleKey = BIT(0) , kOverwrite = BIT(1) , kWriteDelete = BIT(2) }
enum	EDeprecatedStatusBits { kObjInCanvas = BIT(3) }
enum	EStatusBits {   kCanDelete = BIT(0) , kMustCleanup = BIT(3) , kIsReferenced = BIT(4) , kHasUUID = BIT(5) ,   kCannotPick = BIT(6) , kNoContextMenu = BIT(8) , kInvalidObject = BIT(13) }
Static Public Member Functions inherited from TBranch
static void	ResetCount ()
	Static function resetting fgCount.
Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag.
static Bool_t	GetObjectStat ()
	Get status of object stat flag.
static void	SetDtorOnly (void *obj)
	Set destructor only flag.
static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable.
Protected Types inherited from TBranch
using	BulkObj = ROOT::Experimental::Internal::TBulkBranchRead
using	CacheInfo_t = ROOT::Internal::TBranchCacheInfo
enum	EStatusBits {   kDoNotProcess = ::kDoNotProcess , kIsClone = ::kIsClone , kBranchObject = ::kBranchObject , kBranchAny = ::kBranchAny ,   kAutoDelete = BIT(15) , kDoNotUseBufferMap = BIT(22) }
	TBranch status bits. More...
typedef void(TBranch::*	FillLeaves_t) (TBuffer &b)
typedef void(TBranch::*	ReadLeaves_t) (TBuffer &b)
Protected Types inherited from TObject
enum	{ kOnlyPrepStep = BIT(3) }
Static Protected Attributes inherited from TBranch
static Int_t	fgCount = 0
	! branch counter

#include <TBranchRef.h>

Inheritance diagram for TBranchRef:

Constructor & Destructor Documentation

TBranchRef() [1/2]

TBranchRef::TBranchRef

(

)

Default constructor.

Definition at line 46 of file TBranchRef.cxx.

TBranchRef() [2/2]

TBranchRef::TBranchRef

(

TTree *

tree

)

Main constructor called by TTree::BranchRef.

Definition at line 55 of file TBranchRef.cxx.

~TBranchRef()

TBranchRef::~TBranchRef ( )

virtual

Typical destructor.

Definition at line 87 of file TBranchRef.cxx.

Member Function Documentation

Clear()

void TBranchRef::Clear ( Option_t *  option = "" )

virtual

Clear entries in the TRefTable.

Reimplemented from TNamed.

Definition at line 95 of file TBranchRef.cxx.

FillImpl()

Int_t TBranchRef::FillImpl ( ROOT::Internal::TBranchIMTHelper *  imtHelper )

privatevirtual

Fill the branch basket with the referenced objects parent numbers.

Reimplemented from TBranch.

Definition at line 103 of file TBranchRef.cxx.

FillLeavesImpl()

void TBranchRef::FillLeavesImpl ( TBuffer &  b )

protected

This function called by TBranch::Fill overloads TBranch::FillLeaves.

Definition at line 176 of file TBranchRef.cxx.

GetRefTable()

TRefTable * TBranchRef::GetRefTable ( ) const

inline

Definition at line 49 of file TBranchRef.h.

Notify()

Bool_t TBranchRef::Notify ( )

virtual

This function is called by TRefTable::Notify, itself called by TRef::GetObject.

The function reads the branch containing the object referenced by the TRef.

Reimplemented from TObject.

Definition at line 115 of file TBranchRef.cxx.

Print()

void TBranchRef::Print ( Option_t *  option = "" ) const

virtual

Print the TRefTable branch.

Reimplemented from TBranch.

Definition at line 159 of file TBranchRef.cxx.

ReadLeavesImpl()

void TBranchRef::ReadLeavesImpl ( TBuffer &  b )

protected

This function called by TBranch::GetEntry overloads TBranch::ReadLeaves.

Definition at line 167 of file TBranchRef.cxx.

Reset()

void TBranchRef::Reset ( Option_t *  option = "" )

virtual

• Existing buffers are deleted
• Entries, max and min are reset
• TRefTable is cleared.

Reimplemented from TBranch.

Definition at line 187 of file TBranchRef.cxx.

ResetAfterMerge()

void TBranchRef::ResetAfterMerge ( TFileMergeInfo *  info )

virtual

Reset a Branch after a Merge operation (drop data but keep customizations) TRefTable is cleared.

Reimplemented from TBranch.

Definition at line 198 of file TBranchRef.cxx.

SetParent()

Int_t TBranchRef::SetParent ( const TObject *  object, Int_t  branchID  )

virtual

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.

Definition at line 212 of file TBranchRef.cxx.

SetRequestedEntry()

virtual void TBranchRef::SetRequestedEntry ( Long64_t  entry )

inlinevirtual

Definition at line 55 of file TBranchRef.h.

Member Data Documentation

fRefTable

TRefTable* TBranchRef::fRefTable

protected

pointer to the TRefTable

Definition at line 39 of file TBranchRef.h.

fRequestedEntry

Long64_t TBranchRef::fRequestedEntry

private

! Cursor indicating which entry is being requested.

Definition at line 36 of file TBranchRef.h.

Libraries for TBranchRef:

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The documentation for this class was generated from the following files:

• tree/tree/inc/TBranchRef.h
• tree/tree/src/TBranchRef.cxx