A TLeaf describes individual elements of a TBranch See TBranch structure in TTree.
A TTree object is a list of TBranch. A TBranch object is a list of TLeaf. In most cases, the TBranch will have one TLeaf. A TLeaf describes the branch data types and holds the data.
A few notes about the data held by the leaf. It can contain:
- a single object or primitive (e.g., one float),
- a fixed-number of objects (e.g., each entry has two floats). The number of elements per entry is saved in
fLen.
- a dynamic number of primitives. The number of objects in each entry is saved in the
fLeafCount branch.
Note options (2) and (3) can combined - if fLeafCount says an entry has 3 elements and fLen is 2, then there will be 6 objects in that entry.
Additionally, fNdata is transient and generated on read to determine the necessary size of a buffer to hold event data; depending on the call-site, it may be sized larger than the number of elements
Definition at line 57 of file TLeaf.h.
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| | TLeaf () |
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| | TLeaf (TBranch *parent, const char *name, const char *type) |
| | Create a Leaf.
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| virtual | ~TLeaf () |
| | Destructor.
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| void | Browse (TBrowser *b) override |
| | Browse the content of this leaf.
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| virtual Bool_t | CanGenerateOffsetArray () |
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| virtual void | Export (TClonesArray *, Int_t) |
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| virtual void | FillBasket (TBuffer &b) |
| | Pack leaf elements in Basket output buffer.
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| virtual Int_t * | GenerateOffsetArray (Int_t base, Int_t events) |
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| TBranch * | GetBranch () const |
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| virtual DeserializeType | GetDeserializeType () const |
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| virtual TString | GetFullName () const |
| | Return the full name (including the parent's branch names) of the leaf.
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| virtual TLeaf * | GetLeafCount () const |
| | If this leaf stores a variable-sized array or a multi-dimensional array whose last dimension has variable size, return a pointer to the TLeaf that stores such size.
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| virtual TLeaf * | GetLeafCounter (Int_t &countval) const |
| | Return a pointer to the counter of this leaf (if any) or store the number of elements that the leaf contains in countval.
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| virtual const Counts_t * | GetLeafCountValues (Long64_t start, Long64_t len) |
| | If this branch is a branch count, return the set of collection size for the entry range requested start: first entry to read and return information about len: number of entries to read.
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| virtual Int_t | GetLen () const |
| | Return the number of effective elements of this leaf, for the current entry.
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| virtual Int_t | GetLenStatic () const |
| | Return the fixed length of this leaf.
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| virtual Int_t | GetLenType () const |
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| virtual Int_t | GetMaximum () const |
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| virtual Int_t | GetMinimum () const |
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| virtual Int_t | GetNdata () const |
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| virtual Int_t | GetOffset () const |
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| template<typename T > |
| T | GetTypedValue (Int_t i=0) const |
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| virtual const char * | GetTypeName () const |
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| virtual Double_t | GetValue (Int_t i=0) const |
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| virtual Long64_t | GetValueLong64 (Int_t i=0) const |
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| virtual LongDouble_t | GetValueLongDouble (Int_t i=0) const |
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| virtual void * | GetValuePointer () const |
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| virtual void | Import (TClonesArray *, Int_t) |
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| virtual Bool_t | IncludeRange (TLeaf *) |
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| TClass * | IsA () const override |
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| virtual Bool_t | IsOnTerminalBranch () const |
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| virtual Bool_t | IsRange () const |
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| virtual Bool_t | IsUnsigned () const |
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| virtual void | PrintValue (Int_t i=0) const |
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| virtual void | ReadBasket (TBuffer &) |
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| virtual void | ReadBasketExport (TBuffer &, TClonesArray *, Int_t) |
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| virtual bool | ReadBasketFast (TBuffer &, Long64_t) |
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| virtual bool | ReadBasketSerialized (TBuffer &, Long64_t) |
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| virtual void | ReadValue (std::istream &, Char_t=' ') |
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| Int_t | ResetAddress (void *add, Bool_t calledFromDestructor=kFALSE) |
| | Helper routine for TLeafX::SetAddress.
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| virtual void | SetAddress (void *add=nullptr) |
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| virtual void | SetBranch (TBranch *branch) |
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| virtual void | SetLeafCount (TLeaf *leaf) |
| | Set the leaf count of this leaf.
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| virtual void | SetLen (Int_t len=1) |
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| virtual void | SetOffset (Int_t offset=0) |
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| virtual void | SetRange (Bool_t range=kTRUE) |
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| virtual void | SetUnsigned () |
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| void | Streamer (TBuffer &) override |
| | Stream a class object.
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| void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
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| | TNamed () |
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| | TNamed (const char *name, const char *title) |
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| | TNamed (const TNamed &named) |
| | TNamed copy ctor.
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| | TNamed (const TString &name, const TString &title) |
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| virtual | ~TNamed () |
| | TNamed destructor.
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| void | Clear (Option_t *option="") override |
| | Set name and title to empty strings ("").
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| TObject * | Clone (const char *newname="") const override |
| | Make a clone of an object using the Streamer facility.
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| Int_t | Compare (const TObject *obj) const override |
| | Compare two TNamed objects.
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| void | Copy (TObject &named) const override |
| | Copy this to obj.
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| virtual void | FillBuffer (char *&buffer) |
| | Encode TNamed into output buffer.
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| const char * | GetName () const override |
| | Returns name of object.
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| const char * | GetTitle () const override |
| | Returns title of object.
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| ULong_t | Hash () const override |
| | Return hash value for this object.
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| TClass * | IsA () const override |
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| Bool_t | IsSortable () const override |
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| void | ls (Option_t *option="") const override |
| | List TNamed name and title.
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| TNamed & | operator= (const TNamed &rhs) |
| | TNamed assignment operator.
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| void | Print (Option_t *option="") const override |
| | Print TNamed name and title.
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| virtual void | SetName (const char *name) |
| | Set the name of the TNamed.
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| virtual void | SetNameTitle (const char *name, const char *title) |
| | Set all the TNamed parameters (name and title).
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| virtual void | SetTitle (const char *title="") |
| | Set the title of the TNamed.
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| virtual Int_t | Sizeof () const |
| | Return size of the TNamed part of the TObject.
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| void | Streamer (TBuffer &) override |
| | Stream an object of class TObject.
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| void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
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| | TObject () |
| | TObject constructor.
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| | TObject (const TObject &object) |
| | TObject copy ctor.
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| virtual | ~TObject () |
| | TObject destructor.
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| void | AbstractMethod (const char *method) const |
| | Use this method to implement an "abstract" method that you don't want to leave purely abstract.
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| virtual void | AppendPad (Option_t *option="") |
| | Append graphics object to current pad.
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| 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.
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| virtual const char * | ClassName () const |
| | Returns name of class to which the object belongs.
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| virtual void | Delete (Option_t *option="") |
| | Delete this object.
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| virtual Int_t | DistancetoPrimitive (Int_t px, Int_t py) |
| | Computes distance from point (px,py) to the object.
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| virtual void | Draw (Option_t *option="") |
| | Default Draw method for all objects.
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| virtual void | DrawClass () const |
| | Draw class inheritance tree of the class to which this object belongs.
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| virtual TObject * | DrawClone (Option_t *option="") const |
| | Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).
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| virtual void | Dump () const |
| | Dump contents of object on stdout.
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| virtual void | Error (const char *method, const char *msgfmt,...) const |
| | Issue error message.
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| virtual void | Execute (const char *method, const char *params, Int_t *error=nullptr) |
| | Execute method on this object with the given parameter string, e.g.
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| virtual void | Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr) |
| | Execute method on this object with parameters stored in the TObjArray.
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| virtual void | ExecuteEvent (Int_t event, Int_t px, Int_t py) |
| | Execute action corresponding to an event at (px,py).
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| virtual void | Fatal (const char *method, const char *msgfmt,...) const |
| | Issue fatal error message.
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| virtual TObject * | FindObject (const char *name) const |
| | Must be redefined in derived classes.
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| virtual TObject * | FindObject (const TObject *obj) const |
| | Must be redefined in derived classes.
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| virtual Option_t * | GetDrawOption () const |
| | Get option used by the graphics system to draw this object.
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| virtual const char * | GetIconName () const |
| | Returns mime type name of object.
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| virtual char * | GetObjectInfo (Int_t px, Int_t py) const |
| | Returns string containing info about the object at position (px,py).
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| virtual Option_t * | GetOption () const |
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| virtual UInt_t | GetUniqueID () const |
| | Return the unique object id.
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| virtual Bool_t | HandleTimer (TTimer *timer) |
| | Execute action in response of a timer timing out.
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| 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.
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| virtual void | Info (const char *method, const char *msgfmt,...) const |
| | Issue info message.
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| virtual Bool_t | InheritsFrom (const char *classname) const |
| | Returns kTRUE if object inherits from class "classname".
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| virtual Bool_t | InheritsFrom (const TClass *cl) const |
| | Returns kTRUE if object inherits from TClass cl.
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| virtual void | Inspect () const |
| | Dump contents of this object in a graphics canvas.
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| void | InvertBit (UInt_t f) |
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| Bool_t | IsDestructed () const |
| | IsDestructed.
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| virtual Bool_t | IsEqual (const TObject *obj) const |
| | Default equal comparison (objects are equal if they have the same address in memory).
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| virtual Bool_t | IsFolder () const |
| | Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).
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| R__ALWAYS_INLINE Bool_t | IsOnHeap () const |
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| R__ALWAYS_INLINE Bool_t | IsZombie () const |
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| 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).
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| virtual Bool_t | Notify () |
| | This method must be overridden to handle object notification.
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| void | Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const |
| | Use this method to declare a method obsolete.
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| void | operator delete (void *ptr) |
| | Operator delete.
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| void | operator delete[] (void *ptr) |
| | Operator delete [].
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| void * | operator new (size_t sz) |
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| void * | operator new (size_t sz, void *vp) |
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| void * | operator new[] (size_t sz) |
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| void * | operator new[] (size_t sz, void *vp) |
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| TObject & | operator= (const TObject &rhs) |
| | TObject assignment operator.
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| virtual void | Paint (Option_t *option="") |
| | This method must be overridden if a class wants to paint itself.
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| virtual void | Pop () |
| | Pop on object drawn in a pad to the top of the display list.
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| virtual Int_t | Read (const char *name) |
| | Read contents of object with specified name from the current directory.
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| virtual void | RecursiveRemove (TObject *obj) |
| | Recursively remove this object from a list.
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| void | ResetBit (UInt_t f) |
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| virtual void | SaveAs (const char *filename="", Option_t *option="") const |
| | Save this object in the file specified by filename.
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| virtual void | SavePrimitive (std::ostream &out, Option_t *option="") |
| | Save a primitive as a C++ statement(s) on output stream "out".
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| void | SetBit (UInt_t f) |
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| void | SetBit (UInt_t f, Bool_t set) |
| | Set or unset the user status bits as specified in f.
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| virtual void | SetDrawOption (Option_t *option="") |
| | Set drawing option for object.
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| virtual void | SetUniqueID (UInt_t uid) |
| | Set the unique object id.
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| void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
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| virtual void | SysError (const char *method, const char *msgfmt,...) const |
| | Issue system error message.
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| R__ALWAYS_INLINE Bool_t | TestBit (UInt_t f) const |
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| Int_t | TestBits (UInt_t f) const |
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| virtual void | UseCurrentStyle () |
| | Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.
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| virtual void | Warning (const char *method, const char *msgfmt,...) const |
| | Issue warning message.
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| virtual Int_t | Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) |
| | Write this object to the current directory.
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| virtual Int_t | Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const |
| | Write this object to the current directory.
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Public Types inherited from TObject
