TBranchElement

class TBranchElement : public TBranch

    public:

                          TBranchElement()
                          TBranchElement(const char* name, TStreamerInfo* sinfo, Int_t id, char* pointer, Int_t basketsize = 32000, Int_t splitlevel = 0, Int_t btype = 0)
                          TBranchElement(const char* name, TClonesArray* clones, Int_t basketsize = 32000, Int_t splitlevel = 0, Int_t compress = -1)
                  virtual ~TBranchElement()
            virtual Int_t Branch(const char* folder, Int_t bufsize = 32000, Int_t splitlevel = 99)
         virtual TBranch* Branch(const char* name, void* address, const char* leaflist, Int_t bufsize = 32000)
         virtual TBranch* Branch(const char* name, const char* classname, void* addobj, Int_t bufsize = 32000, Int_t splitlevel = 99)
             virtual void Browse(TBrowser* b)
                     void BuildTitle(const char* name)
           static TClass* Class()
            virtual Int_t Fill()
             virtual void FillLeaves(TBuffer& b)
          TBranchElement* GetBranchCount() const
          TBranchElement* GetBranchCount2() const
      virtual const char* GetClassName() const
      virtual const char* GetClonesName() const
                    Int_t GetDataMemberOffset(const TClass* cl, const char* name)
            virtual Int_t GetEntry(Int_t entry = 0, Int_t getall = 0)
      virtual const char* GetIconName() const
                    Int_t GetID() const
           TStreamerInfo* GetInfo()
            virtual Int_t GetMaximum() const
                    Int_t GetNdata() const
                    char* GetObject() const
      virtual const char* GetParentName() const
                    Int_t GetStreamerType() const
                    Int_t GetType() const
      virtual const char* GetTypeName() const
                 Double_t GetValue(Int_t i, Int_t len, Bool_t subarr = kFALSE) const
            virtual void* GetValuePointer() const
          virtual TClass* IsA() const
                   Bool_t IsBranchFolder() const
           virtual Bool_t IsFolder() const
           virtual Bool_t Notify()
             virtual void Print(const Option_t* option) const
                     void PrintValue(Int_t i) const
             virtual void ReadLeaves(TBuffer& b)
             virtual void Reset(const Option_t* option)
             virtual void SetAddress(void* addobj)
             virtual void SetAutoDelete(Bool_t autodel = kTRUE)
             virtual void SetBasketSize(Int_t buffsize)
             virtual void SetBranchCount(TBranchElement* bre)
             virtual void SetBranchCount2(TBranchElement* bre)
             virtual void SetBranchFolder()
             virtual void SetClassName(const char* name)
             virtual void SetParentName(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
              TString fParentName     Name of parent class
              TString fClonesName     Name of class in TClonesArray (if any)
                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
                Int_t fMaximum        Maximum entries for a TClonesArray or variable array
                Int_t fNdata          !Number of data in this branch
      TBranchElement* fBranchCount    pointer to primary branchcount branch
      TBranchElement* fBranchCount2   pointer to secondary branchcount branch
       TStreamerInfo* fInfo           !Pointer to StreamerInfo
                char* fObject         !Pointer to object at *fAddress
                char* fBranchPointer  !Pointer to object for a master branch

    public:

      static const enum TBranchElement:: kWarn          
      static const enum TBranchElement:: kBranchFolder  
      static const enum TBranchElement:: kDeleteObject  

Class Description

                                                                      
 TBranchElement                                                       
                                                                      
 A Branch for the case of an object                                   
                                                                      

*-*-*-*-*-*Default constructor for BranchElement*-*-*-*-*-*-*-*-*-*
*-*        ====================================

 Create a BranchElement

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

 Create a BranchElement

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

*-*-*-*-*-*Default destructor for a BranchElement*-*-*-*-*-*-*-*-*-*-*-*
*-*        =====================================

  Create a sub-branch of this branch (simple variable case)
  ==================================

     This Branch constructor is provided to support non-objects in
     a Tree. The variables described in leaflist may be simple variables
     or structures.
    See the two following constructors for writing objects in a Tree.

    By default the branch buffers are stored in the same file as the Tree.
    use TBranch::SetFile to specify a different file

   This function creates one sub-branch for each element in the folder.
   The function returns the total number of branches created.

  Create a sub-branch of this branch (with a class)
  ==================================

    Build a TBranchElement for an object of class classname.
    addobj is the address of a pointer to an object of class classname.
    The class dictionary must be available (ClassDef in class header).

    This option requires access to the library where the corresponding class
    is defined. Accessing one single data member in the object implies
    reading the full object.

    By default the branch buffers are stored in the same file as the parent branch.
    use TBranch::SetFile to specify a different file

    see IMPORTANT NOTE about branch names in TTree::Bronch

   Use splitlevel < 0 instead of splitlevel=0 when the class
   has a custom Streamer

set branch/leaf name/title in case of a TClonesArray sub-branch

*-*-*-*-*-*-*-*Loop on all leaves of this branch to fill Basket buffer*-*-*
*-*            =======================================================

  Fill buffers of this branch

 return offset od member name in class cl
 check for the following cases Otto and Axel

 case Otto
    class TUsrSevtData2:public TMrbSubevent_Caen {
    class TMrbSubevent_Caen:public TObject {
       TUsrHitBuffer fHitBuffer;
    class TUsrHitBuffer:public TObject {
       Int_t fHighWater;
       TClonesArray *fHits;
    code below to get the correct address for fHitBuffer.fHits

 case Axel
    class jet: public TLorentzVector {
    TClonesArray* caJet=new TClonesArray("jet");
    TTree* tree=new TTree("test","test",99);
    tree->Branch("jet", "TClonesArray",&caJet, 32000);

*-*-*-*-*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  the function returns 0.
  If an I/O error occurs,  the function returns -1.

  See IMPORTANT REMARKS in TTree::GetEntry

 Return icon name depending on type of branch element.

return pointer to TStreamerinfo object for the class of this branch
rebuild the info if not yet done

 Return maximum count value of the branchcount if any

 return type name of element in the branch

 Returns branch value. If the leaf is an array, j is the index in the array
 If leaf is an array inside a TClonesArray, len should be the length of the
 array.  If subarr is true, then len is actually the index within the sub-array

 Returns pointer to first data element of this branch
 Currently used only for members of type character

*-*-*-*-*Return TRUE if more than one leaf, FALSE otherwise*-*
*-*      ==================================================

*-*-*-*-*-*-*-*-*-*-*-*Print TBranch parameters*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                    ========================

 Prints leaf value

 Read buffers for this branch

*-*-*-*-*-*-*-*Reset a Branch*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*            ====================

    Existing buffers are deleted
    Entries, max and min are reset

*-*-*-*-*-*-*-*Set address of this branch*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*            ====================

*-*-*-*-*-*-*-*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.

 Reset basket size for all subbranches of this branchelement

 Set the branch count for this branch

 Stream an object of class TBranchElement.

 unroll base classes and loop on all elements of class cl

Inline Functions

        TBranchElement* GetBranchCount() const
        TBranchElement* GetBranchCount2() const
            const char* GetClassName() const
            const char* GetClonesName() const
                  Int_t GetID() const
                  char* GetObject() const
            const char* GetParentName() const
                  Int_t GetNdata() const
                  Int_t GetType() const
                  Int_t GetStreamerType() const
                 Bool_t IsBranchFolder() const
                 Bool_t Notify()
                   void SetBranchCount2(TBranchElement* bre)
                   void SetBranchFolder()
                   void SetClassName(const char* name)
                   void SetParentName(const char* name)
                   void SetType(Int_t btype)
                TClass* Class()
                TClass* IsA() const
                   void ShowMembers(TMemberInspector& insp, char* parent)
                   void StreamerNVirtual(TBuffer& b)