A TFriendElement TF describes a TTree object TF in a file.

When a TFriendElement TF is added to the the list of friends of an existing TTree T, any variable from TF can be referenced in a query to T.

To add a TFriendElement to an existing TTree T, do:

T.AddFriend("friendTreename","friendTreeFile");

See TTree::AddFriend for more information.

Definition at line 35 of file TFriendElement.h.

Public Types
enum	{ kFromChain = BIT(11) }

Public Types inherited from TObject
enum	EStatusBits { kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) }

enum	{ kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }

Public Member Functions
	TFriendElement ()

	TFriendElement (TTree tree, const char treename, const char *filename)
	Create a friend element. More...

	TFriendElement (TTree tree, const char treename, TFile *file)
	Create a friend element. More...

	TFriendElement (TTree tree, TTree friendtree, const char *alias)
	Create a friend element. More...

virtual	~TFriendElement ()
	Destructor. Disconnect from the owning tree if needed. More...

virtual TTree *	Connect ()
	Connect file and return TTree. More...

virtual TTree *	DisConnect ()
	DisConnect file and TTree. More...

virtual TFile *	GetFile ()
	Return pointer to TFile containing this friend TTree. More...

virtual TTree *	GetParentTree () const

virtual TTree *	GetTree ()
	Return pointer to friend TTree. More...

virtual const char *	GetTreeName () const

virtual void	ls (Option_t *option="") const
	List this friend element. More...

Public Member Functions inherited from TNamed
	TNamed ()

	TNamed (const char name, const char title)

	TNamed (const TString &name, const TString &title)

	TNamed (const TNamed &named)

TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator. More...

virtual	~TNamed ()

virtual void	Clear (Option_t *option="")
	Set name and title to empty strings (""). More...

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility. More...

virtual Int_t	Compare (const TObject *obj) const
	Compare two TNamed objects. More...

virtual void	Copy (TObject &named) const
	Copy this to obj. More...

virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer. More...

virtual const char *	GetName () const
	Returns name of object. More...

virtual const char *	GetTitle () const
	Returns title of object. More...

virtual ULong_t	Hash () const
	Return hash value for this object. More...

virtual Bool_t	IsSortable () const

virtual void	SetName (const char *name)
	Change (i.e. More...

virtual void	SetNameTitle (const char name, const char title)
	Change (i.e. set) all the TNamed parameters (name and title). More...

virtual void	SetTitle (const char *title="")
	Change (i.e. set) the title of the TNamed. More...

virtual void	Print (Option_t *option="") const
	Print TNamed name and title. More...

virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject. More...

Public Member Functions inherited from TObject
	TObject ()

	TObject (const TObject &object)
	TObject copy ctor. More...

TObject &	operator= (const TObject &rhs)
	TObject assignment operator. More...

virtual	~TObject ()
	TObject destructor. More...

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad. More...

virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action. More...

virtual const char *	ClassName () const
	Returns name of class to which the object belongs. More...

virtual void	Delete (Option_t *option="")
	Delete this object. More...

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object. More...

virtual void	Draw (Option_t *option="")
	Default Draw method for all objects. More...

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs. More...

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current pad. More...

virtual void	Dump () const
	Dump contents of object on stdout. More...

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. More...

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py). More...

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes. More...

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes. More...

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object. More...

virtual UInt_t	GetUniqueID () const
	Return the unique object id. More...

virtual const char *	GetIconName () const
	Returns mime type name of object. More...

virtual Option_t *	GetOption () const

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py). More...

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out. More...

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname". More...

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl. More...

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas. More...

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...

virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory). More...

Bool_t	IsOnHeap () const

Bool_t	IsZombie () const

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification. More...

virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself. More...

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list. More...

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory. More...

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list. More...

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename. More...

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out". More...

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object. More...

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id. More...

virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory. More...

void *	operator new (size_t sz)

void *	operator new[] (size_t sz)

void *	operator new (size_t sz, void *vp)

void *	operator new[] (size_t sz, void *vp)

void	operator delete (void *ptr)
	Operator delete. More...

void	operator delete[] (void *ptr)
	Operator delete []. More...

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f. More...

void	SetBit (UInt_t f)

void	ResetBit (UInt_t f)

Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

void	InvertBit (UInt_t f)

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message. More...

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message. More...

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message. More...

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message. More...

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message. More...

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...

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). More...

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete. More...

Protected Member Functions
	TFriendElement (const TFriendElement &)
	Copy constructor. More...

TFriendElement &	operator= (const TFriendElement &)
	Equal operator. More...

Protected Member Functions inherited from TObject
void	MakeZombie ()

virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected). More...

Protected Attributes
TTree *	fParentTree

TTree *	fTree
	pointer to the parent TTree More...

TFile *	fFile
	pointer to the TTree described by this element More...

TString	fTreeName
	pointer to the file containing the friend TTree More...

Bool_t	fOwnFile

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

Friends
void	TFriendElement__SetTree (TTree tree, TList frlist)
	Set the fTree member for all friend elements. More...

Additional Inherited Members
Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...

static void	SetDtorOnly (void *obj)
	Set destructor only flag. More...

static Bool_t	GetObjectStat ()
	Get status of object stat flag. More...

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable. More...

#include <TFriendElement.h>

Inheritance diagram for TFriendElement:

Collaboration diagram for TFriendElement:

Member Enumeration Documentation

anonymous enum

Enumerator
kFromChain

Definition at line 50 of file TFriendElement.h.

Constructor & Destructor Documentation

TFriendElement::TFriendElement ( const TFriendElement & tfe )

protected

Copy constructor.

Definition at line 146 of file TFriendElement.cxx.

TFriendElement::TFriendElement ( )

TFriendElement::TFriendElement	(	TTree *	tree,
		const char *	treename,
		const char *	filename
	)

Create a friend element.

If treename is of the form "a=b", an alias called "a" is created for treename = "b" by default the alias name is the name of the tree.

Definition at line 49 of file TFriendElement.cxx.

TFriendElement::TFriendElement	(	TTree *	tree,
		const char *	treename,
		TFile *	file
	)

Create a friend element.

If treename is of the form "a=b", an alias called "a" is created for treename = "b" by default the alias name is the name of the tree. The passed TFile is managed by the user (i.e. user must delete the TFile).

Definition at line 77 of file TFriendElement.cxx.

TFriendElement::TFriendElement	(	TTree *	tree,
		TTree *	friendtree,
		const char *	alias
	)

Create a friend element.

Definition at line 107 of file TFriendElement.cxx.

TFriendElement::~TFriendElement ( )

virtual

Destructor. Disconnect from the owning tree if needed.

Definition at line 174 of file TFriendElement.cxx.

Member Function Documentation

TTree * TFriendElement::Connect ( )

virtual

Connect file and return TTree.

Definition at line 182 of file TFriendElement.cxx.

Referenced by TFriendElement().

TTree * TFriendElement::DisConnect ( )

virtual

DisConnect file and TTree.

Definition at line 193 of file TFriendElement.cxx.

Referenced by ~TFriendElement().

TFile * TFriendElement::GetFile ( )

virtual

Return pointer to TFile containing this friend TTree.

Definition at line 204 of file TFriendElement.cxx.

Referenced by TTree::AddFriend(), Connect(), and GetTree().

virtual TTree* TFriendElement::GetParentTree ( ) const

inlinevirtual

Definition at line 59 of file TFriendElement.h.

TTree * TFriendElement::GetTree ( )

virtual

virtual const char* TFriendElement::GetTreeName ( ) const

inlinevirtual

Definition at line 61 of file TFriendElement.h.

Referenced by TTree::GetFriend(), and GetTree().

void TFriendElement::ls ( Option_t * option = "" ) const

virtual

List this friend element.

Reimplemented from TNamed.

Definition at line 248 of file TFriendElement.cxx.

TFriendElement & TFriendElement::operator= ( const TFriendElement & tfe )

protected

Equal operator.

Definition at line 159 of file TFriendElement.cxx.

Friends And Related Function Documentation

void TFriendElement__SetTree	(	TTree *	tree,
		TList *	frlist
	)

friend

Set the fTree member for all friend elements.

Definition at line 8577 of file TTree.cxx.

Member Data Documentation

TFile* TFriendElement::fFile

protected

pointer to the TTree described by this element

Definition at line 40 of file TFriendElement.h.

Referenced by DisConnect(), GetFile(), GetTree(), operator=(), and TFriendElement().

Bool_t TFriendElement::fOwnFile

protected

Definition at line 42 of file TFriendElement.h.

Referenced by DisConnect(), GetFile(), operator=(), and TFriendElement().

TTree* TFriendElement::fParentTree

protected

Definition at line 38 of file TFriendElement.h.

Referenced by GetFile(), GetParentTree(), operator=(), TFriendElement(), and TFriendElement__SetTree().

TTree* TFriendElement::fTree

protected

pointer to the parent TTree

Definition at line 39 of file TFriendElement.h.

Referenced by DisConnect(), GetTree(), operator=(), and TFriendElement().

TString TFriendElement::fTreeName

protected

pointer to the file containing the friend TTree

Definition at line 41 of file TFriendElement.h.

Referenced by operator=(), and TFriendElement().

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

tree/tree/inc/TFriendElement.h
tree/tree/src/TFriendElement.cxx

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Friends

Additional Inherited Members

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation