library: libTree
#include "TFriendElement.h"

TFriendElement

class description - header file - source file - inheritance tree (.pdf)

class TFriendElement : public TNamed

Inheritance Chart:

TObject

TNamed

TFriendElement


    protected:

                      TFriendElement(const TFriendElement&)
      TFriendElement& operator=(const TFriendElement&)

    public:

                          TFriendElement()
                          TFriendElement(TTree* tree, const char* treename, const char* filename)
                          TFriendElement(TTree* tree, const char* treename, TFile* file)
                          TFriendElement(TTree* tree, TTree* friendtree, const char* alias)
                  virtual ~TFriendElement()
           static TClass* Class()
           virtual TTree* Connect()
           virtual TTree* DisConnect()
           virtual TFile* GetFile()
           virtual TTree* GetParentTree() const
           virtual TTree* GetTree()
      virtual const char* GetTreeName() const
          virtual TClass* IsA() const
             virtual void ls(Option_t* option = "") const
             virtual void ShowMembers(TMemberInspector& insp, char* parent)
             virtual void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)

Data Members


    protected:

       TTree* fParentTree  !pointer to the parent TTree
       TTree* fTree        !pointer to the TTree described by this element
       TFile* fFile        !pointer to the file containing the friend TTree
      TString fTreeName    name of the friend TTree
       Bool_t fOwnFile     true if file is managed by this class

    public:

      static const enum TFriendElement:: kFromChain

Class Description

                                                                      
 TFriendElement                                                       
                                                                      
 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.

TFriendElement()

*-*-*-*-*-*Default constructor for a friend element*-*-*-*-*-*-*-*-*-*-*-*-*
*-*        =======================================

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.

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).

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

 Create a friend element.

TFriendElement(const TFriendElement& tfe)

 Copy constructor

TFriendElement& operator=(const TFriendElement& tfe)

 Equal operator

~TFriendElement()

 Destructor.  Disconnect from the owning tree if needed.

TTree * Connect()

 Connect file and return TTree.

TTree * DisConnect()

 DisConnect file and TTree.

TFile * GetFile()

 Return pointer to TFile containing this friend TTree.

TTree * GetTree()

 Return pointer to friend TTree.

void ls(Option_t *)

 List this friend element.

Author: Rene Brun 07/04/2001
Last update: root/tree:$Name: $:$Id: TFriendElement.cxx,v 1.13 2006/05/31 10:05:49 brun Exp $
Copyright (C) 1995-2001, Rene Brun and Fons Rademakers. *

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