TBranchElement


class description - source file - inheritance tree

class TBranchElement : public TBranch


    protected:
public:
TBranchElement TBranchElement() TBranchElement TBranchElement(const char* name, TStreamerInfo* sinfo, Int_t id, char* pointer, Int_t basketsize = 32000, Int_t splitlevel = 0, Int_t compress = -1) TBranchElement TBranchElement(TBranchElement&) virtual void ~TBranchElement() virtual void Browse(TBrowser* b) static TClass* Class() virtual Int_t Fill() virtual void FillLeaves(TBuffer& b) virtual const char* GetClassName() const virtual Int_t GetEntry(Int_t entry = 0, Int_t getall = 0) virtual Int_t GetID() TStreamerInfo* GetInfo() const virtual Int_t GetStreamerType() virtual Int_t GetType() virtual TClass* IsA() const virtual Bool_t IsFolder() const virtual void Print(Option_t* option) const virtual void ReadLeaves(TBuffer& b) virtual void Reset(Option_t* option) virtual void SetAddress(void* addobj) virtual void SetAutoDelete(Bool_t autodel = kTRUE) virtual void SetBasketSize(Int_t buffsize) virtual void SetClassName(const char* name) virtual void SetType(Int_t btype) virtual void ShowMembers(TMemberInspector& insp, char* parent) virtual void Streamer(TBuffer& b) void StreamerNVirtual(TBuffer& b) virtual Int_t Unroll(const char* name, TClass* cltop, TClass* cl, Int_t basketsize, Int_t splitlevel, Int_t btype)

Data Members

protected:
TString fClassName Class name of referenced object Int_t fClassVersion Version number of class Int_t fID element serial number in fInfo Int_t fType branch type Int_t fStreamerType branch streamer type TStreamerInfo* fInfo !Pointer to StreamerInfo public:
static const enum TObject:: kWarn

Class Description

                                                                      
 TBranchElement                                                       
                                                                      
 A Branch for the case of an object                                   //                                                                      
                                                                      


TBranchElement(): TBranch()
*-*-*-*-*-*Default constructor for BranchElement*-*-*-*-*-*-*-*-*-*
*-*        ====================================

TBranchElement(const char *bname, TStreamerInfo *sinfo, Int_t id, char *pointer, Int_t basketsize, Int_t splitlevel, Int_t compress) :TBranch()
 Create a BranchElement

 If splitlevel > 0 this branch in turn is split into sub branches

~TBranchElement()
*-*-*-*-*-*Default destructor for a BranchElement*-*-*-*-*-*-*-*-*-*-*-*
*-*        =====================================

void Browse(TBrowser *b)

Int_t Fill()
*-*-*-*-*-*-*-*Loop on all leaves of this branch to fill Basket buffer*-*-*
*-*            =======================================================

void FillLeaves(TBuffer &b)
  Fill buffers of this branch

Int_t GetEntry(Int_t entry, Int_t getall)
*-*-*-*-*Read all branches of a BranchElement and return total number of bytes
*-*      ====================================================================
   If entry = 0 take current entry number + 1
   If entry < 0 reset entry number to 0

  The function returns the number of bytes read from the input buffer.
  If entry does not exist or an I/O error occurs, the function returns 0.
  if entry is the same as the previous call, the function returns 1.

Bool_t IsFolder() const
*-*-*-*-*Return TRUE if more than one leaf, FALSE otherwise*-*
*-*      ==================================================

void Print(Option_t *option) const
*-*-*-*-*-*-*-*-*-*-*-*Print TBranch parameters*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                    ========================

void ReadLeaves(TBuffer &b)
 Read buffers for this branch

void Reset(Option_t *option)
*-*-*-*-*-*-*-*Reset a Branch*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*            ====================

    Existing buffers are deleted
    Entries, max and min are reset


void SetAddress(void *add)
*-*-*-*-*-*-*-*Set address of this branch*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*            ====================


void SetAutoDelete(Bool_t autodel)
*-*-*-*-*-*-*-*Set the AutoDelete bit
*-*            ====================
  This function can be used to instruct Root in TBranchElement::ReadBasket
  to not delete the object referenced by a branchelement before reading a
  new entry. By default, the object is deleted.
  If autodel is kTRUE, this existing object will be deleted, a new object
    created by the default constructor, then object->Streamer called.
  If autodel is kFALSE, the existing object is not deleted. Root assumes
    that the user is taking care of deleting any internal object or array
    This can be done in Streamer itself.
  If this branch has sub-branches, the function sets autodel for these
  branches as well.
  We STRONGLY suggest to activate this option by default when you create
  the top level branch. This will make the read phase more efficient
  because it minimizes the numbers of new/delete operations.
  Once this option has been set and the Tree is written to a file, it is
  not necessary to specify the option again when reading, unless you
  want to set the opposite mode.


void SetBasketSize(Int_t buffsize)
 Reset basket size for all subbranches of this branchelement

Int_t Unroll(const char *name, TClass *cltop, TClass *cl,Int_t basketsize, Int_t splitlevel, Int_t btype)
 unroll base classes and loop on all elements of class cl



Inline Functions


           const char* GetClassName() const
                 Int_t GetID()
        TStreamerInfo* GetInfo() const
                 Int_t GetType()
                 Int_t GetStreamerType()
                  void SetClassName(const char* name)
                  void SetType(Int_t btype)
               TClass* Class()
               TClass* IsA() const
                  void ShowMembers(TMemberInspector& insp, char* parent)
                  void Streamer(TBuffer& b)
                  void StreamerNVirtual(TBuffer& b)
        TBranchElement TBranchElement(TBranchElement&)


Author: Rene Brun 14/01/2001
Last update: root/tree:$Name: $:$Id: TBranchElement.cxx,v 1.10 2001/03/12 07:18:35 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *


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