// @(#)root/tree:$Name: $:$Id: TTree.cxx,v 1.147 2003/04/17 07:44:45 brun Exp $
// Author: Rene Brun 12/01/96
/*************************************************************************
* Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
//////////////////////////////////////////////////////////////////////////
// //
// TTree //
// //
// a TTree object has a header with a name and a title.
// It consists of a list of independent branches (TBranch). Each branch
// has its own definition and list of buffers. Branch buffers may be
// automatically written to disk or kept in memory until the Tree attribute
// fMaxVirtualSize is reached.
// Variables of one branch are written to the same buffer.
// A branch buffer is automatically compressed if the file compression
// attribute is set (default).
//
// Branches may be written to different files (see TBranch::SetFile).
//
// The ROOT user can decide to make one single branch and serialize one
// object into one single I/O buffer or to make several branches.
// Making one single branch and one single buffer can be the right choice
// when one wants to process only a subset of all entries in the tree.
// (you know for example the list of entry numbers you want to process).
// Making several branches is particularly interesting in the data analysis
// phase, when one wants to histogram some attributes of an object (entry)
// without reading all the attributes.
//
/*
*/
//
//
// ==> TTree *tree = new TTree(name, title, maxvirtualsize)
// Creates a Tree with name and title. Maxvirtualsize is by default 64Mbytes,
// maxvirtualsize = 64000000(default) means: Keeps as many buffers in memory until
// the sum of all buffers is greater than 64 Megabyte. When this happens,
// memory buffers are written to disk and deleted until the size of all
// buffers is again below the threshold.
// maxvirtualsize = 0 means: keep only one buffer in memory.
//
// Various kinds of branches can be added to a tree:
// A - simple structures or list of variables. (may be for C or Fortran structures)
// B - any object (inheriting from TObject). (we expect this option be the most frequent)
// C - a ClonesArray. (a specialized object for collections of same class objects)
//
// ==> Case A
// ======
// TBranch *branch = tree->Branch(branchname,address, leaflist, bufsize)
// * address is the address of the first item of a structure
// * leaflist is the concatenation of all the variable names and types
// separated by a colon character :
// The variable name and the variable type are separated by a slash (/).
// The variable type may be 0,1 or 2 characters. If no type is given,
// the type of the variable is assumed to be the same as the previous
// variable. If the first variable does not have a type, it is assumed
// of type F by default. The list of currently supported types is given below:
// - C : a character string terminated by the 0 character
// - B : an 8 bit signed integer (Char_t)
// - b : an 8 bit unsigned integer (UChar_t)
// - S : a 16 bit signed integer (Short_t)
// - s : a 16 bit unsigned integer (UShort_t)
// - I : a 32 bit signed integer (Int_t)
// - i : a 32 bit unsigned integer (UInt_t)
// - F : a 32 bit floating point (Float_t)
// - D : a 64 bit floating point (Double_t)
//
// ==> Case B
// ======
// TBranch *branch = tree->Branch(branchname,className,object, bufsize, splitlevel)
// object is the address of a pointer to an existing object (derived from TObject).
// if splitlevel=0, the object is serialized in the branch buffer.
// if splitlevel=1 (default), this branch will automatically be split
// into subbranches, with one subbranch for each data member or object
// of the object itself. In case the object member is a TClonesArray,
// the mechanism described in case C is applied to this array.
// if splitlevel=2 ,this branch will automatically be split
// into subbranches, with one subbranch for each data member or object
// of the object itself. In case the object member is a TClonesArray,
// it is processed as a TObject*, only one branch.
//
// ==> Case C
// ======
// TBranch *branch = tree->Branch(branchname,clonesarray, bufsize, splitlevel)
// clonesarray is the address of a pointer to a TClonesArray.
// The TClonesArray is a direct access list of objects of the same class.
// For example, if the TClonesArray is an array of TTrack objects,
// this function will create one subbranch for each data member of
// the object TTrack.
//
//
// ==> branch->SetAddress(Void *address)
// In case of dynamic structures changing with each entry for example, one must
// redefine the branch address before filling the branch again.
// This is done via the TBranch::SetAddress member function.
//
// ==> tree->Fill()
// loops on all defined branches and for each branch invokes the Fill function.
//
// See also the class TNtuple (a simple Tree with branches of floats)
//
// Adding a Branch to an Existing Tree
// ===================================
// You may want to add a branch to an existing tree. For example,
// if one variable in the tree was computed with a certain algorithm,
// you may want to try another algorithm and compare the results.
// One solution is to add a new branch, fill it, and save the tree.
// The code below adds a simple branch to an existing tree.
// Note the kOverwrite option in the Write method, it overwrites the
// existing tree. If it is not specified, two copies of the tree headers
// are saved.
//
// void tree3AddBranch(){
// TFile f("tree3.root","update");
//
// Float_t new_v;
// TTree *t3 = (TTree*)f->Get("t3");
// TBranch *newBranch = t3->Branch("new_v",&new_v,"new_v/F");
//
// //read the number of entries in the t3
// Int_t nentries = (Int_t)t3->GetEntries();
//
// for (Int_t i = 0; i < nentries; i++){
// new_v= gRandom->Gaus(0,1);
// newBranch->Fill();
// }
// // save only the new version of the tree
// t3->Write("",TObject::kOverwrite);
// }
// Adding a branch is often not possible because the tree is in a read-only
// file and you do not have permission to save the modified tree with the
// new branch. Even if you do have the permission, you risk loosing the
// original tree with an unsuccessful attempt to save the modification.
// Since trees are usually large, adding a branch could extend it over the
// 2GB limit. In this case, the attempt to write the tree fails, and the
// original data is erased.
// In addition, adding a branch to a tree enlarges the tree and increases
// the amount of memory needed to read an entry, and therefore decreases
// the performance.
// For these reasons, ROOT offers the concept of friends for trees (and chains).
// We encourage you to use TTree::AddFriend rather than adding a branch manually.
//
//
/*
*/
//
// =============================================================================
//______________________________________________________________________________
//*-*-*-*-*-*-*A simple example with histograms and a tree*-*-*-*-*-*-*-*-*-*
//*-* ===========================================
//
// This program creates :
// - a one dimensional histogram
// - a two dimensional histogram
// - a profile histogram
// - a tree
//
// These objects are filled with some random numbers and saved on a file.
//
//-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
//
// #include "TFile.h"
// #include "TH1.h"
// #include "TH2.h"
// #include "TProfile.h"
// #include "TRandom.h"
// #include "TTree.h"
//
//
// //______________________________________________________________________________
// main(int argc, char **argv)
// {
// // Create a new ROOT binary machine independent file.
// // Note that this file may contain any kind of ROOT objects, histograms,trees
// // pictures, graphics objects, detector geometries, tracks, events, etc..
// // This file is now becoming the current directory.
// TFile hfile("htree.root","RECREATE","Demo ROOT file with histograms & trees");
//
// // Create some histograms and a profile histogram
// TH1F *hpx = new TH1F("hpx","This is the px distribution",100,-4,4);
// TH2F *hpxpy = new TH2F("hpxpy","py ps px",40,-4,4,40,-4,4);
// TProfile *hprof = new TProfile("hprof","Profile of pz versus px",100,-4,4,0,20);
//
// // Define some simple structures
// typedef struct {Float_t x,y,z;} POINT;
// typedef struct {
// Int_t ntrack,nseg,nvertex;
// UInt_t flag;
// Float_t temperature;
// } EVENTN;
// static POINT point;
// static EVENTN eventn;
//
// // Create a ROOT Tree
// TTree *tree = new TTree("T","An example of ROOT tree with a few branches");
// tree->Branch("point",&point,"x:y:z");
// tree->Branch("eventn",&eventn,"ntrack/I:nseg:nvertex:flag/i:temperature/F");
// tree->Branch("hpx","TH1F",&hpx,128000,0);
//
// Float_t px,py,pz;
// static Float_t p[3];
//
// //--------------------Here we start a loop on 1000 events
// for ( Int_t i=0; i<1000; i++) {
// gRandom->Rannor(px,py);
// pz = px*px + py*py;
// Float_t random = gRandom->::Rndm(1);
//
// // Fill histograms
// hpx->Fill(px);
// hpxpy->Fill(px,py,1);
// hprof->Fill(px,pz,1);
//
// // Fill structures
// p[0] = px;
// p[1] = py;
// p[2] = pz;
// point.x = 10*(random-1);;
// point.y = 5*random;
// point.z = 20*random;
// eventn.ntrack = Int_t(100*random);
// eventn.nseg = Int_t(2*eventn.ntrack);
// eventn.nvertex = 1;
// eventn.flag = Int_t(random+0.5);
// eventn.temperature = 20+random;
//
// // Fill the tree. For each event, save the 2 structures and 3 objects
// // In this simple example, the objects hpx, hprof and hpxpy are slightly
// // different from event to event. We expect a big compression factor!
// tree->Fill();
// }
// //--------------End of the loop
//
// tree->Print();
//
// // Save all objects in this file
// hfile.Write();
//
// // Close the file. Note that this is automatically done when you leave
// // the application.
// hfile.Close();
//
// return 0;
// }
// //
//////////////////////////////////////////////////////////////////////////
#include <string.h>
#include <stdio.h>
#include "TROOT.h"
#include "TSystem.h"
#include "TFile.h"
#include "TTree.h"
#include "TEventList.h"
#include "TBranchElement.h"
#include "TBranchObject.h"
#include "TLeafObject.h"
#include "TLeaf.h"
#include "TLeafB.h"
#include "TLeafC.h"
#include "TLeafI.h"
#include "TLeafF.h"
#include "TLeafS.h"
#include "TLeafD.h"
#include "TLeafElement.h"
#include "TBasket.h"
#include "TMath.h"
#include "TDirectory.h"
#include "TBranchClones.h"
#include "TClonesArray.h"
#include "TClass.h"
#include "TBaseClass.h"
#include "TRealData.h"
#include "TDataMember.h"
#include "TDataType.h"
#include "TBrowser.h"
#include "TStyle.h"
#include "TVirtualPad.h"
#include "TInterpreter.h"
#include "TRegexp.h"
#include "TArrayC.h"
#include "TFolder.h"
#include "TStreamerInfo.h"
#include "TStreamerElement.h"
#include "TFriendElement.h"
#include "TVirtualFitter.h"
#include "TCut.h"
#include "Api.h"
Int_t TTree::fgBranchStyle = 1; //use new TBranch style with TBranchElement
Int_t TTree::fgMaxTreeSize = 1900000000;
TTree *gTree;
const Int_t kMaxLen = 512;
ClassImp(TTree)
//______________________________________________________________________________
TTree::TTree(): TNamed()
{
//*-*-*-*-*-*-*-*-*-*-*Default Tree constructor*-*-*-*-*-*-*-*-*-*-*-*-*-*
//*-* ========================
fScanField = 25;
fMaxEntryLoop = 1000000000;
fMaxVirtualSize = 0;
fDirectory = 0;
fEntries = 0;
fTotBytes = 0;
fZipBytes = 0;
fWeight = 1;
fAutoSave = 100000000;
fSavedBytes = 0;
fTotalBuffers = 0;
fChainOffset = 0;
fReadEntry = -1;
fEstimate = 1000000;
fUpdate = 0;
fEventList = 0;
fPacketSize = 100;
fTimerInterval = 0;
fPlayer = 0;
fDebug = 0;
fDebugMin = 0;
fDebugMax = 9999999;
fFriends = 0;
fMakeClass = 0;
fNotify = 0;
fFileNumber = 0;
}
//______________________________________________________________________________
TTree::TTree(const char *name,const char *title, Int_t splitlevel)
:TNamed(name,title)
{
//*-*-*-*-*-*-*-*-*-*Normal Tree constructor*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
//*-* ======================
//
// The Tree is created in the current directory
// Use the various functions Branch below to add branches to this Tree.
//
// If the first character of title is a "/", the function assumes a folder name.
// In this case, it creates automatically branches following the folder hierarchy.
// splitlevel may be used in this case to control the split level.
fScanField = 25;
fMaxEntryLoop = 1000000000;
fMaxVirtualSize = 0;
fDirectory = gDirectory;
fEntries = 0;
fTotBytes = 0;
fZipBytes = 0;
fWeight = 1;
fAutoSave = 100000000;
fSavedBytes = 0;
fTotalBuffers = 0;
fChainOffset = 0;
fReadEntry = -1;
fEstimate = 1000000;
fUpdate = 0;
fEventList = 0;
fPacketSize = 100;
fTimerInterval = 0;
fPlayer = 0;
fDebug = 0;
fDebugMin = 0;
fDebugMax = 9999999;
fFriends = 0;
fMakeClass = 0;
fNotify = 0;
fFileNumber = 0;
SetFillColor(gStyle->GetHistFillColor());
SetFillStyle(gStyle->GetHistFillStyle());
SetLineColor(gStyle->GetHistLineColor());
SetLineStyle(gStyle->GetHistLineStyle());
SetLineWidth(gStyle->GetHistLineWidth());
SetMarkerColor(gStyle->GetMarkerColor());
SetMarkerStyle(gStyle->GetMarkerStyle());
SetMarkerSize(gStyle->GetMarkerSize());
gDirectory->Append(this);
// if title starts with ":" and is a valid folder name, a superbranch
// is created.
gTree = this;
if (strlen(title) > 2) {
if (title[0] == '/') {
Branch(title+1,32000,splitlevel);
}
}
}
//______________________________________________________________________________
TTree::~TTree()
{
//*-*-*-*-*-*-*-*-*-*-*Tree destructor*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
//*-* =================
if (fDirectory) {
if (!fDirectory->TestBit(TDirectory::kCloseDirectory)) {
fDirectory->GetList()->Remove(this);
}
}
fLeaves.Clear();
fBranches.Delete();
delete fPlayer;
if (fFriends) {
fFriends->Delete();
delete fFriends;
fFriends = 0;
}
fDirectory = 0; //must be done after the destruction of friends
}
//______________________________________________________________________________
TFriendElement *TTree::AddFriend(const char *treename, const char *filename)
{
// Add a TFriendElement to the list of friends.
// 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.
//
// A tree keeps a list of friends. In the context of a tree (or a chain),
// friendship means unrestricted access to the friends data. In this way
// it is much like adding another branch to the tree without taking the risk
// of damaging it. To add a friend to the list, you can use the TTree::AddFriend
// method. The tree in the diagram below has two friends (friend_tree1 and
// friend_tree2) and now has access to the variables a,b,c,i,j,k,l and m.
//
//
/*
*/
//
//
// The AddFriend method has two parameters, the first is the tree name and the
// second is the name of the ROOT file where the friend tree is saved.
// AddFriend automatically opens the friend file. If no file name is given,
// the tree called ft1 is assumed to be in the same file as the original tree.
//
// tree.AddFriend("ft1","friendfile1.root");
// If the friend tree has the same name as the original tree, you can give it
// an alias sin the context of the friendship:
//
// tree.AddFriend("tree1 = tree","friendfile1.root");
// Once the tree has friends, we can use TTree::Draw as if the friend's
// variables were in the original tree. To specify which tree to use in
// the Draw method, use the syntax:
//
// <treeName>.<branchname>.<varname>
// If the variablename is enough to uniquely identify the variable, you can
// leave out the tree and/or branch name.
// For example, these commands generate a 3-d scatter plot of variable "var"
// in the TTree tree versus variable v1 in TTree ft1 versus variable v2 in
// TTree ft2.
//
// tree.AddFriend("ft1","friendfile1.root");
// tree.AddFriend("ft2","friendfile2.root");
// tree.Draw("var:ft1.v1:ft2.v2");
//
//
/*
*/
//
//
// The picture illustrates the access of the tree and its friends with a
// Draw command.
// When AddFriend is called, the ROOT file is automatically opened and the
// friend tree (ft1) is read into memory. The new friend (ft1) is added to
// the list of friends of tree.
// The number of entries in the friend must be equal or greater to the number
// of entries of the original tree. If the friend tree has fewer entries a
// warning is given and the missing entries are not included in the histogram.
// To retrieve the list of friends from a tree use TTree::GetListOfFriends.
// When the tree is written to file (TTree::Write), the friends list is saved
// with it. And when the tree is retrieved, the trees on the friends list are
// also retrieved and the friendship restored.
// When a tree is deleted, the elements of the friend list are also deleted.
// It is possible to declare a friend tree that has the same internal
// structure (same branches and leaves) as the original tree, and compare the
// same values by specifying the tree.
//
// tree.Draw("var:ft1.var:ft2.var")
if (!fFriends) fFriends = new TList();
TFriendElement *fe = new TFriendElement(this,treename,filename);
if (fe) {
fFriends->Add(fe);
TTree *t = fe->GetTree();
if (t) {
if (t->GetEntries() < fEntries) {
Warning("AddFriend","FriendElement %s in file %s has less entries %g than its parent Tree: %g",
treename,filename,t->GetEntries(),fEntries);
}
} else {
Warning("AddFriend","Unknown Tree %s in file %s",treename,filename);
}
} else {
Warning("AddFriend","Cannot add FriendElement %s in file %s",treename,filename);
}
return fe;
}
//______________________________________________________________________________
TFriendElement *TTree::AddFriend(const char *treename, TFile *file)
{
// Add a TFriendElement to the list of friends. The TFile is managed by
// the user (e.g. the user must delete the file).
// For complete description see AddFriend(const char *, const char *).
if (!fFriends) fFriends = new TList();
TFriendElement *fe = new TFriendElement(this,treename,file);
if (fe) {
fFriends->Add(fe);
TTree *t = fe->GetTree();
if (t) {
if (t->GetEntries() < fEntries) {
Warning("AddFriend","FriendElement %s in file %s has less entries %g than its parent tree: %g",
treename,file->GetName(),t->GetEntries(),fEntries);
}
} else {
Warning("AddFriend","unknown tree %s in file %s",treename,file->GetName());
}
} else {
Warning("AddFriend","cannot add FriendElement %s in file %s",treename,
file?file->GetName():"");
}
return fe;
}
//______________________________________________________________________________
TFriendElement *TTree::AddFriend(TTree *tree, const char* alias, Bool_t warn)
{
// Add a TFriendElement to the list of friends. The TTree is managed by
// the user (e.g. the user must delete the file).
// For complete description see AddFriend(const char *, const char *).
if (!tree) return 0;
if (!fFriends) fFriends = new TList();
TFriendElement *fe = new TFriendElement(this,tree, alias);
if (fe) {
fFriends->Add(fe);
TTree *t = fe->GetTree();
if (warn && t->GetEntries() < fEntries) {
Warning("AddFriend","FriendElement %s in file %s has less entries %g than its parent tree: %g",
tree->GetName(),fe->GetFile()?fe->GetFile()->GetName():"(memory resident)",
t->GetEntries(),fEntries);
}
}
return fe;
}
//______________________________________________________________________________
void TTree::AutoSave()
{
//*-*-*-*-*-*-*-*-*-*-*AutoSave tree header every fAutoSave bytes*-*-*-*-*-*
//*-* ==========================================
//
// When large Trees are produced, it is safe to activate the AutoSave
// procedure. Some branches may have buffers holding many entries.
// AutoSave is automatically called by TTree::Fill when the number of bytes
// generated since the previous AutoSave is greater than fAutoSave bytes.
// This function may also be invoked by the user, for example every
// N entries.
// Each AutoSave generates a new key on the file.
// Once the key with the tree header has been written, the previous cycle
// (if any) is deleted.
//
// Note that calling TTree::AutoSave too frequently (or similarly calling
// TTree::SetAutoSave with a small value) is an expensive operation.
// You should make tests for your own application to find a compromize
// between speed and the quantity of information you may loose in case of
// a job crash.
//
// In case your program crashes before closing the file holding this tree,
// the file will be automatically recovered when you will connect the file
// in UPDATE mode.
// The Tree will be recovered at the status corresponding to the last AutoSave.
//
if (!fDirectory || fDirectory == gROOT || !fDirectory->IsWritable()) return;
if (gDebug > 0) {
printf("AutoSave Tree:%s after %g bytes writtenn",GetName(),fTotBytes);
}
fSavedBytes = fTotBytes;
TDirectory *dirsav = gDirectory;
fDirectory->cd();
TKey *key = (TKey*)fDirectory->GetListOfKeys()->FindObject(GetName());
Int_t wOK = Write(); //wOK will be 0 if Write failed (disk space exceeded)
if (wOK && key) {
key->Delete();
delete key;
}
// save StreamerInfo
TFile *file = fDirectory->GetFile();
if (file) file->WriteStreamerInfo();
dirsav->cd();
}
//______________________________________________________________________________
Int_t TTree::Branch(TList *list, Int_t bufsize, Int_t splitlevel)
{
// Deprecated function. Use next function instead.
return Branch((TCollection*)list,bufsize,splitlevel);
}
//______________________________________________________________________________
Int_t TTree::Branch(TCollection *list, Int_t bufsize, Int_t splitlevel, const char *name)
{
// This function creates one branch for each element in the collection.
// Each entry in the collection becomes a top level branch if the
// corresponding class is not a collection. If it is a collection, the entry
// in the collection becomes in turn top level branches, etc.
// The splitlevel is decreased by 1 everytime a new collection is found.
// For example if list is a TObjArray*
// - if splitlevel = 1, one top level branch is created for each element
// of the TObjArray.
// - if splitlevel = 2, one top level branch is created for each array element.
// if, in turn, one of the array elements is a TCollection, one top level
// branch will be created for each element of this collection.
//
// In case a collection element is a TClonesArray, the special Tree constructor
// for TClonesArray is called.
// The collection itself cannot be a TClonesArray.
//
// The function returns the total number of branches created.
//
// If name is given, all branch names will be prefixed with name_.
//
// IMPORTANT NOTE1: This function should not be called with splitlevel < 1.
//
// IMPORTANT NOTE2: The branches created by this function will have names
// corresponding to the collection or object names. It is important
// to give names to collections to avoid misleading branch names or
// identical branch names. By default collections have a name equal to
// the corresponding class name, eg the default name for a TList is "TList".
//
// Example--------------------------------------------------------------:
/*
{
TTree T("T","test list");
TList *l = new TList();
TObjArray *a1 = new TObjArray();
a1->SetName("a1");
l->Add(a1);
TH1F *ha1a = new TH1F("ha1a","ha1",100,0,1);
TH1F *ha1b = new TH1F("ha1b","ha1",100,0,1);
a1->Add(ha1a);
a1->Add(ha1b);
TObjArray *b1 = new TObjArray();
b1->SetName("b1");
l->Add(b1);
TH1F *hb1a = new TH1F("hb1a","hb1",100,0,1);
TH1F *hb1b = new TH1F("hb1b","hb1",100,0,1);
b1->Add(hb1a);
b1->Add(hb1b);
TObjArray *a2 = new TObjArray();
a2->SetName("a2");
l->Add(a2);
TH1S *ha2a = new TH1S("ha2a","ha2",100,0,1);
TH1S *ha2b = new TH1S("ha2b","ha2",100,0,1);
a2->Add(ha2a);
a2->Add(ha2b);
T.Branch(l,16000,2);
T.Print();
}
*/
//----------------------------------------------------------------------
if (list == 0) return 0;
TObject *obj;
Int_t nbranches = GetListOfBranches()->GetEntries();
if (list->InheritsFrom(TClonesArray::Class())) {
Error("Branch", "Cannot call this constructor for a TClonesArray");
return 0;
}
Int_t nch = strlen(name);
char branchname[kMaxLen];
TIter next(list);
while ((obj = next())) {
if (splitlevel > 1 && obj->InheritsFrom(TCollection::Class())
&& !obj->InheritsFrom(TClonesArray::Class())) {
TCollection *col = (TCollection*)obj;
if (nch) sprintf(branchname,"%s_%s_",name,col->GetName());
else sprintf(branchname,"%s_",col->GetName());
Branch(col,bufsize,splitlevel-1,branchname);
} else {
if (nch && name[nch-1] == '_') sprintf(branchname,"%s%s",name,obj->GetName());
else {
if (nch) sprintf(branchname,"%s_%s",name,obj->GetName());
else sprintf(branchname,"%s",obj->GetName());
}
if (splitlevel > 1) strcat(branchname,".");
Bronch(branchname,obj->ClassName(),
list->GetObjectRef(obj),bufsize,splitlevel-1);
}
}
return GetListOfBranches()->GetEntries() - nbranches;
}
//______________________________________________________________________________
Int_t TTree::Branch(const char *foldername, Int_t bufsize, Int_t splitlevel)
{
// This function creates one branch for each element in the folder.
// The function returns the total number of branches created.
TObject *ob = gROOT->FindObjectAny(foldername);
if (!ob) return 0;
if (ob->IsA() != TFolder::Class()) return 0;
Int_t nbranches = GetListOfBranches()->GetEntries();
TFolder *folder = (TFolder*)ob;
TIter next(folder->GetListOfFolders());
TObject *obj;
char *curname = new char[1000];
char occur[20];
while ((obj=next())) {
sprintf(curname,"%s/%s",foldername,obj->GetName());
if (obj->IsA() == TFolder::Class()) {
Branch(curname, bufsize, splitlevel-1);
} else {
void *add = (void*)folder->GetListOfFolders()->GetObjectRef(obj);
for (Int_t i=0;i<1000;i++) {
if (curname[i] == 0) break;
if (curname[i] == '/') curname[i] = '.';
}
Int_t noccur = folder->Occurence(obj);
if (noccur > 0) {
sprintf(occur,"_%d",noccur);
strcat(curname,occur);
}
TBranchElement *br;
br = (TBranchElement*)Bronch(curname,obj->ClassName(), add, bufsize, splitlevel-1);
br->SetBranchFolder();
}
}
delete [] curname;
return GetListOfBranches()->GetEntries() - nbranches;
}
//______________________________________________________________________________
TBranch *TTree::Branch(const char *name, void *address, const char *leaflist,Int_t bufsize)
{
//*-*-*-*-*-*-*-*-*-*-*Create a new TTree Branch*-*-*-*-*-*-*-*-*-*-*-*-*
//*-* =========================
//
// 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
gTree = this;
TBranch *branch = new TBranch(name,address,leaflist,bufsize);
if (branch->IsZombie()) {
delete branch;
return 0;
}
fBranches.Add(branch);
return branch;
}
//______________________________________________________________________________
TBranch *TTree::Branch(const char *name, void *clonesaddress, Int_t bufsize, Int_t splitlevel)
{
// Special constructor for TClonesArray.
// Note that this function is only provided for backward compatibility.
// The Branch or Bronch methods can automatically detect the case of TClonesArray.
//
//
// name: global name of this BranchClones
// bufsize: buffersize in bytes of each individual data member buffer
// clonesaddress is the address of a pointer to a TClonesArray.
//
// This Tree option is provided in case each entry consists of one
// or more arrays of same class objects (tracks, hits,etc).
// This function creates as many branches as there are public data members
// in the objects pointed by the TClonesArray. Note that these data members
// can be only basic data types, not pointers or objects.
//
// BranchClones have the following advantages compared to the two other
// solutions (Branch and BranchObject).
// - When reading the Tree data, it is possible to read selectively
// a subset of one object (may be just one single data member).
// - This solution minimizes the number of objects created/destructed.
// - Data members of the same type are consecutive in the basket buffers,
// therefore optimizing the compression algorithm.
// - Array processing notation becomes possible in the query language.
//
// By default the branch buffers are stored in the same file as the Tree.
// use TBranch::SetFile to specify a different file
//
// By default the two members of TObject (fBits and fUniqueID) are stored
// on individual branches. If the splitlevel > 1, these two branches
// will not be created.
if (clonesaddress == 0) return 0;
char *cpointer =(char*)clonesaddress;
char **ppointer =(char**)cpointer;
TClonesArray *list = (TClonesArray*)(*ppointer);
if (list == 0) return 0;
gTree = this;
if (fgBranchStyle == 1) {
return Bronch(name,"TClonesArray",clonesaddress,bufsize,splitlevel);
}
if (splitlevel > 0) {
TBranchClones *branch = new TBranchClones(name,clonesaddress,bufsize,-1,splitlevel);
fBranches.Add(branch);
return branch;
} else {
TBranchObject *branch = new TBranchObject(name,list->ClassName(),clonesaddress,bufsize,0);
fBranches.Add(branch);
return branch;
}
}
//______________________________________________________________________________
TBranch *TTree::Branch(const char *name, const char *classname, void *addobj, Int_t bufsize, Int_t splitlevel)
{
// create a new branch with the object of class classname at address addobj.
//
// WARNING:
// Starting with Root version 3.01, the Branch function uses the new style
// branches (TBranchElement). To get the old behaviour, you can:
// - call BranchOld or
// - call TTree::SetBranchStyle(0)
//
// Note that with the new style, classname does not need to derive from TObject.
// It must derived from TObject if the branch style has been set to 0 (old)
//
// Use splitlevel < 0 instead of splitlevel=0 when the class
// has a custom Streamer
if (fgBranchStyle == 1) {
return Bronch(name,classname,addobj,bufsize,splitlevel);
} else {
if (splitlevel < 0) splitlevel = 0;
return BranchOld(name,classname,addobj,bufsize,splitlevel);
}
}
//______________________________________________________________________________
TBranch *TTree::BranchOld(const char *name, const char *classname, void *addobj, Int_t bufsize, Int_t splitlevel)
{
//*-*-*-*-*-*-*-*-*-*-*Create a new TTree BranchObject*-*-*-*-*-*-*-*-*-*-*-*
//*-* ===============================
//
// Build a TBranchObject for an object of class classname.
// addobj is the address of a pointer to an object of class classname.
// IMPORTANT: classname must derive from TObject.
// 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.
// See the next Branch constructor for a more efficient storage
// in case the entry consists of arrays of identical objects.
//
// By default the branch buffers are stored in the same file as the Tree.
// use TBranch::SetFile to specify a different file
//
// IMPORTANT NOTE about branch names
// In case two or more master branches contain subbranches with
// identical names, one must add a "." (dot) character at the end
// of the master branch name. This will force the name of the subbranch
// to be master.subbranch instead of simply subbranch.
// This situation happens when the top level object (say event)
// has two or more members referencing the same class.
// For example, if a Tree has two branches B1 and B2 corresponding
// to objects of the same class MyClass, one can do:
// tree.Branch("B1.","MyClass",&b1,8000,1);
// tree.Branch("B2.","MyClass",&b2,8000,1);
// if MyClass has 3 members a,b,c, the two instructions above will generate
// subbranches called B1.a, B1.b ,B1.c, B2.a, B2.b, B2.c
gTree = this;
TClass *cl = gROOT->GetClass(classname);
if (!cl) {
Error("BranchObject","Cannot find class:%s",classname);
return 0;
}
TBranch *branch = new TBranchObject(name,classname,addobj,bufsize,splitlevel);
fBranches.Add(branch);
if (!splitlevel) return branch;
TObjArray *blist = branch->GetListOfBranches();
const char *rdname;
const char *dname;
char branchname[128];
char **apointer = (char**)(addobj);
TObject *obj = (TObject*)(*apointer);
Bool_t delobj = kFALSE;
if (!obj) {
obj = (TObject*)cl->New();
delobj = kTRUE;
}
//build the StreamerInfo if first time for the class
BuildStreamerInfo(cl,obj);
//*-*- Loop on all public data members of the class and its base classes
Int_t lenName = strlen(name);
Int_t isDot = 0;
if (name[lenName-1] == '.') isDot = 1;
TBranch *branch1 = 0;
TRealData *rd, *rdi;
TIter nexti(cl->GetListOfRealData());
TIter next(cl->GetListOfRealData());
while ((rd = (TRealData *) next())) {
TDataMember *dm = rd->GetDataMember();
if (!dm->IsPersistent()) continue; //do not process members with a ! as the first
// character in the comment field
if (rd->IsObject()) {
TClass *clm = gROOT->GetClass(dm->GetFullTypeName());
if (clm) BuildStreamerInfo(clm,(char*)obj+rd->GetThisOffset());
continue;
}
rdname = rd->GetName();
dname = dm->GetName();
if (cl->CanIgnoreTObjectStreamer()) {
if (strcmp(dname,"fBits") == 0) continue;
if (strcmp(dname,"fUniqueID") == 0) continue;
}
TDataType *dtype = dm->GetDataType();
Int_t code = 0;
if (dtype) code = dm->GetDataType()->GetType();
//*-*- Encode branch name. Use real data member name
sprintf(branchname,"%s",rdname);
if (isDot) {
if (dm->IsaPointer()) sprintf(branchname,"%s%s",name,&rdname[1]);
else sprintf(branchname,"%s%s",name,&rdname[0]);
}
char leaflist[128];
Int_t offset = rd->GetThisOffset();
char *pointer = (char*)obj + offset;
if (dm->IsaPointer()) {
TClass *clobj = 0;
if (!dm->IsBasic()) clobj = gROOT->GetClass(dm->GetTypeName());
if (clobj && clobj->InheritsFrom("TClonesArray")) {
char *cpointer =(char*)pointer;
char **ppointer =(char**)cpointer;
TClonesArray *list = (TClonesArray*)(*ppointer);
if (splitlevel != 2) {
if (isDot) branch1 = new TBranchClones(&branchname[0],pointer,bufsize);
else branch1 = new TBranchClones(&branchname[1],pointer,bufsize);
blist->Add(branch1);
} else {
if (isDot) branch1 = new TBranchObject(&branchname[0],list->ClassName(),pointer,bufsize);
else branch1 = new TBranchObject(&branchname[1],list->ClassName(),pointer,bufsize);
blist->Add(branch1);
}
} else {
if (!clobj) {
const char * index = dm->GetArrayIndex();
if (strlen(index)!=0) {
//check that index is a valid data member name
//if member is part of an object (eg fA and index=fN)
//index must be changed from fN to fA.fN
char aindex[128];
strcpy(aindex,rd->GetName());
char *rdot = strrchr(aindex,'.');
if (rdot) strcpy(rdot+1,index);
nexti.Reset();
while ((rdi = (TRealData *) nexti())) {
if (strcmp(rdi->GetName(),index) == 0) break;
if (strcmp(rdi->GetName(),aindex) == 0) {index = rdi->GetName(); break;}
}
if (code == 1)
// Note that we differentiate between strings and
// char array by the fact that there is NO specified
// size for a string (see next if (code == 1)
sprintf(leaflist,"%s[%s]/%s",&rdname[0],index,"B");
else if (code == 11)
sprintf(leaflist,"%s[%s]/%s",&rdname[0],index,"b");
else if (code == 2)
sprintf(leaflist,"%s[%s]/%s",&rdname[0],index,"S");
else if (code == 12)
sprintf(leaflist,"%s[%s]/%s",&rdname[0],index,"s");
else if (code == 3)
sprintf(leaflist,"%s[%s]/%s",&rdname[0],index,"I");
else if (code == 13)
sprintf(leaflist,"%s[%s]/%s",&rdname[0],index,"i");
else if (code == 5)
sprintf(leaflist,"%s[%s]/%s",&rdname[0],index,"F");
else if (code == 8)
sprintf(leaflist,"%s[%s]/%s",&rdname[0],index,"D");
else {
printf("Cannot create branch for rdname=%s, code=%dn",branchname, code);
leaflist[0] = 0;
}
} else {
if (code == 1) {
sprintf(leaflist,"%s/%s",dname,"C");
} else {
continue;
}
}
// there are '*' in both the branchname and rdname
char bname[128];
UInt_t cursor,pos;
for(cursor = 0, pos = 0;
cursor< strlen(branchname);
cursor++ ) {
if (branchname[cursor]!='*') {
bname[pos++]=branchname[cursor];
}
}
bname[pos] = '0';
for(cursor = 0, pos = 0; cursor< strlen(leaflist); cursor++ ) {
if (leaflist[cursor]!='*') {
leaflist[pos++]=leaflist[cursor];
}
}
leaflist[pos] = '0';
// Add the branch to the tree and indicate that the address
// is that of a pointer to be dereferenced before using.
branch1 = new TBranch(bname,*(void**)pointer,leaflist,bufsize);
TLeaf *leaf = (TLeaf*) branch1->GetListOfLeaves()->At(0);
leaf->SetBit(TLeaf::kIndirectAddress);
leaf->SetAddress((void**)pointer);
blist->Add(branch1);
} else {
if (!clobj->InheritsFrom(TObject::Class())) continue;
branch1 = new TBranchObject(dname,clobj->GetName(),pointer,bufsize,0);
if (isDot) branch1->SetName(&branchname[0]);
else branch1->SetName(&branchname[1]); //do not use the first character (*)
blist->Add(branch1);
}
}
} else {
//*-*-------------Data Member is a basic data type----------
if (dm->IsBasic()) {
if (code == 1) sprintf(leaflist,"%s/%s",rdname,"B");
else if (code == 11) sprintf(leaflist,"%s/%s",rdname,"b");
else if (code == 2) sprintf(leaflist,"%s/%s",rdname,"S");
else if (code == 12) sprintf(leaflist,"%s/%s",rdname,"s");
else if (code == 3) sprintf(leaflist,"%s/%s",rdname,"I");
else if (code == 13) sprintf(leaflist,"%s/%s",rdname,"i");
else if (code == 5) sprintf(leaflist,"%s/%s",rdname,"F");
else if (code == 8) sprintf(leaflist,"%s/%s",rdname,"D");
else {
printf("Cannot create branch for rdname=%s, code=%dn",branchname, code);
leaflist[0] = 0;
}
branch1 = new TBranch(branchname,pointer,leaflist,bufsize);
branch1->SetTitle(rdname);
blist->Add(branch1);
}
}
if (branch1) branch1->SetOffset(offset);
else Warning("Branch","Cannot process member:%s",rdname);
}
if (delobj) delete obj;
return branch;
}
//______________________________________________________________________________
TBranch *TTree::Bronch(const char *name, const char *classname, void *add, Int_t bufsize, Int_t splitlevel)
{
//*-*-*-*-*-*-*-*-*-*-*Create a new TTree BranchElement*-*-*-*-*-*-*-*-*-*-*-*
//*-* ================================
//
// WARNING about this new function
// ===============================
// This function is designed to replace the function TTree::Branch above.
// This function is far more powerful than the Branch function.
// It supports the full C++, including STL and has the same behaviour
// in split or non-split mode. classname does not have to derive from TObject.
// The function is based on the new TStreamerInfo.
//
// 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 Tree.
// use TBranch::SetFile to specify a different file
//
// IMPORTANT NOTE about branch names
// In case two or more master branches contain subbranches with
// identical names, one must add a "." (dot) character at the end
// of the master branch name. This will force the name of the subbranch
// to be master.subbranch instead of simply subbranch.
// This situation happens when the top level object (say event)
// has two or more members referencing the same class.
// For example, if a Tree has two branches B1 and B2 corresponding
// to objects of the same class MyClass, one can do:
// tree.Branch("B1.","MyClass",&b1,8000,1);
// tree.Branch("B2.","MyClass",&b2,8000,1);
// if MyClass has 3 members a,b,c, the two instructions above will generate
// subbranches called B1.a, B1.b ,B1.c, B2.a, B2.b, B2.c
//
// Use splitlevel < 0 instead of splitlevel=0 when the class
// has a custom Streamer
gTree = this;
TClass *cl = gROOT->GetClass(classname);
if (!cl) {
Error("Bronch","Cannot find class:%s",classname);
return 0;
}
//if splitlevel <= 0 and class has a custom Streamer, we must create
//a TBranchObject. We cannot assume that TClass::ReadBuffer is consistent
//with the custom Streamer. The penalty is that one cannot process
//this Tree without the class library containing the class.
//The following convention is used for the RootFlag
// #pragma link C++ class TExMap; rootflag = 0
// #pragma link C++ class TList-; rootflag = 1
// #pragma link C++ class TArray!; rootflag = 2
// #pragma link C++ class TArrayC-!; rootflag = 3
// #pragma link C++ class TBits+; rootflag = 4
// #pragma link C++ class Txxxx+!; rootflag = 6
char **ppointer = (char**)add;
char *objadd = *ppointer;
if (cl == TClonesArray::Class()) {
TClonesArray *clones = (TClonesArray *)objadd;
if (!clones) {
Error("Bronch","Pointer to TClonesArray is null");
return 0;
}
if (!clones->GetClass()) {
Error("Bronch","TClonesArray with no class defined in branch: %s",name);
return 0;
}
G__ClassInfo* classinfo = clones->GetClass()->GetClassInfo();
if (!classinfo) {
Error("Bronch","TClonesArray with no dictionary defined in branch: %s",name);
return 0;
}
if (splitlevel > 0) {
if (classinfo->RootFlag() & 1)
Warning("Bronch","Using split mode on a class: %s with a custom Streamer",clones->GetClass()->GetName());
} else {
if (classinfo->RootFlag() & 1) clones->BypassStreamer(kFALSE);
TBranchObject *branch = new TBranchObject(name,classname,add,bufsize,0);
fBranches.Add(branch);
return branch;
}
}
Bool_t hasCustomStreamer = kFALSE;
if (!cl->GetClassInfo()) {
Error("Bronch","Cannot find dictionary for class: %s",classname);
return 0;
}
if (cl->GetClassInfo()->RootFlag() & 1) hasCustomStreamer = kTRUE;
if (splitlevel < 0 || (splitlevel == 0 && hasCustomStreamer)) {
TBranchObject *branch = new TBranchObject(name,classname,add,bufsize,0);
fBranches.Add(branch);
return branch;
}
//hopefully normal case
Bool_t delobj = kFALSE;
//====> special case of TClonesArray
if(cl == TClonesArray::Class()) {
TBranchElement *branch = new TBranchElement(name,(TClonesArray*)objadd,bufsize,splitlevel);
fBranches.Add(branch);
branch->SetAddress(add);
return branch;
}
//====>
if (!objadd) {
objadd = (char*)cl->New();
*ppointer = objadd;
delobj = kTRUE;
}
//build the StreamerInfo if first time for the class
Bool_t optim = TStreamerInfo::CanOptimize();
if (splitlevel > 0) TStreamerInfo::Optimize(kFALSE);
TStreamerInfo *sinfo = BuildStreamerInfo(cl,objadd);
TStreamerInfo::Optimize(optim);
// create a dummy top level branch object
Int_t id = -1;
if (splitlevel > 0) id = -2;
char *dot = (char*)strchr(name,'.');
Int_t nch = strlen(name);
Bool_t dotlast = kFALSE;
if (nch && name[nch-1] == '.') dotlast = kTRUE;
TBranchElement *branch = new TBranchElement(name,sinfo,id,objadd,bufsize,splitlevel);
fBranches.Add(branch);
if (splitlevel > 0) {
// Loop on all public data members of the class and its base classes
TObjArray *blist = branch->GetListOfBranches();
TIter next(sinfo->GetElements());
TStreamerElement *element;
id = 0;
char *bname = new char[1000];
while ((element = (TStreamerElement*)next())) {
char *pointer = (char*)objadd + element->GetOffset();
Bool_t isBase = element->IsA() == TStreamerBase::Class();
if (isBase) {
TClass *clbase = element->GetClassPointer();
if (clbase == TObject::Class() && cl->CanIgnoreTObjectStreamer()) continue;
}
if (dot) {
if (dotlast) {
sprintf(bname,"%s%s",name,element->GetFullName());
} else {
if (isBase) sprintf(bname,"%s",name);
else sprintf(bname,"%s.%s",name,element->GetFullName());
}
} else {
sprintf(bname,"%s",element->GetFullName());
}
TBranchElement *bre = new TBranchElement(bname,sinfo,id,pointer,bufsize,splitlevel-1);
blist->Add(bre);
id++;
}
delete [] bname;
}
branch->SetAddress(add);
if (delobj) {delete objadd; *ppointer=0;}
return branch;
}
//______________________________________________________________________________
void TTree::Browse(TBrowser *b)
{
fBranches.Browse(b);
}
//______________________________________________________________________________
void TTree::BuildIndex(const char *majorname, const char *minorname)
{
// Build an index table using the leaves with name: major & minor name
// The index is built in the following way:
// A pass on all entries is made using TTree::Draw
// var1 = majorname
// var2 = minorname
// sel = majorname +minorname*1e-9
// The standard result from TTree::Draw is stored in fV1, fV2 and fW
// The array fW is sorted into fIndex
// Once the index is computed, one can retrieve one entry via
// TTree:GetEntryWithIndex(majornumber, minornumber)
// Example:
// tree.BuildIndex("Run","Event"); //creates an index using leaves Run and Event
// tree.GetEntryWithIndex(1234,56789); //reads entry corresponding to
// Run=1234 and Event=56789
//
// Note that majorname and minorname may be expressions using original
// Tree variables eg: "run-90000", "event +3*xx"
// In case an expression is specified, the equivalent expression must be computed
// when calling GetEntryWithIndex.
//
// Note that once the index is built, it can be saved with the TTree object
// with tree.Write(); //if the file has been open in "update" mode.
//
// The most convenient place to create the index is at the end of
// the filling process just before saving the Tree header.
// If a previous index was computed, it is redefined by this new call.
//
// Note that this function can also be applied to a TChain.
Int_t nch = strlen(majorname) + strlen(minorname) + 10;
char *varexp = new char[nch];
sprintf(varexp,"%s+%s*1e-9",majorname,minorname);
Int_t oldEstimate = fEstimate;
Int_t n = (Int_t)GetEntries(); //must use GetEntries instead of fEntries in case of a chain
if (n <= 0) return;
if (n > fEstimate) SetEstimate(n);
Draw(varexp,"","goff");
// Sort array fV1 (contains majorname +minorname*1e-9) into fIndex
Double_t *w = GetPlayer()->GetV1();
Int_t *ind = new Int_t[n];
TMath::Sort(n,w,ind,0);
fIndexValues.Set(n);
fIndex.Set(n);
for (Int_t i=0;i<n;i++) {
fIndexValues.fArray[i] = w[ind[i]];
fIndex.fArray[i] = ind[i];
}
if (n > oldEstimate) SetEstimate(oldEstimate);
// clean up
delete [] ind;
delete [] varexp;
}
//______________________________________________________________________________
TStreamerInfo *TTree::BuildStreamerInfo(TClass *cl, void *pointer)
{
// Build StreamerInfo for class cl
// pointer is an optional argument that may contain a pointer to an object of cl
if (!cl) return 0;
cl->BuildRealData(pointer);
TStreamerInfo *sinfo = cl->GetStreamerInfo(cl->GetClassVersion());
if(fDirectory) sinfo->ForceWriteInfo(fDirectory->GetFile());
// Create StreamerInfo for all base classes
TBaseClass *base;
TIter nextb(cl->GetListOfBases());
while((base = (TBaseClass*)nextb())) {
TClass *clm = gROOT->GetClass(base->GetName());
BuildStreamerInfo(clm);
}
return sinfo;
}
//______________________________________________________________________________
TFile *TTree::ChangeFile(TFile *file)
{
// called by TTree::Fill when file has reached its maximum fgMaxTreeSize.
// Create a new file. If the original file is named "myfile.root",
// subsequent files are named "myfile_1.root", "myfile_2.root", etc.
//
// Return pointer to new file
// Currently, the automatic change of file is restricted
// to the case where the Tree is in the top level directory.
// The file should not contain sub-directories.
//
// Before switching to a new file, the Tree header is written
// to the current file, then the current file is closed.
//
// To process the multiple files created by ChangeFile, one must use
// a TChain.
//
// fgMaxTreeSize can be set via the static function TTree::SetMaxTreeSize.
// The default value of fgMaxTreeSize is 1.9 Gigabytes.
//
// If the current file contains other objects like TH1 and TTree,
// these objects are automatically moved to the new file.
//
// IMPORTANT NOTE:
// Be careful when writing the final Tree header to the file!
// Don't do:
// TFile *file = new TFile("myfile.root","recreate");
// TTree *T = new TTree("T","title");
// T->Fill(); //loop
// file->Write();
// file->Close();
// but do the following:
// TFile *file = new TFile("myfile.root","recreate");
// TTree *T = new TTree("T","title");
// T->Fill(); //loop
// file = T->GetCurrentFile(); //to get the pointer to the current file
// file->Write();
// file->Close();
file->cd();
Write();
Reset();
fFileNumber++;
char *fname = new char[2000];
fname[0] = 0;
strcpy(fname,file->GetName());
if (fFileNumber > 1) {
char *cunder = strrchr(fname,'_');
if (cunder) {
sprintf(cunder,"_%d",fFileNumber);
strcat(fname,strrchr(file->GetName(),'.'));
} else {
char fcount[10];
sprintf(fcount,"_%d",fFileNumber);
strcat(fname,fcount);
}
} else {
char *cdot = strrchr(fname,'.');
if (cdot) {
sprintf(cdot,"_%d",fFileNumber);
strcat(fname,strrchr(file->GetName(),'.'));
} else {
char fcount[10];
sprintf(fcount,"_%d",fFileNumber);
strcat(fname,fcount);
}
}
Int_t compress = file->GetCompressionLevel();
TFile *newfile = TFile::Open(fname,"recreate","chain files",compress);
Printf("Fill: Switching to new file: %s",fname);
// current directory may contain histograms and trees.
// These objects must be moved to the new file
TBranch *branch;
TObject *obj;
while((obj = file->GetList()->First())) {
file->GetList()->Remove(obj);
//histogram: just change the directory
if (obj->InheritsFrom("TH1")) {
gROOT->ProcessLine(Form("((%s*)0x%lx)->SetDirectory((TDirectory*)0x%lx);",obj->ClassName(),(Long_t)obj,(Long_t)newfile));
continue;
}
//tree: must save all Trees in the old file, reset them
if (obj->InheritsFrom("TTree")) {
TTree *t = (TTree*)obj;
if (t != this) {
t->Write();
t->Reset();
t->fFileNumber = fFileNumber;
}
t->SetDirectory(newfile);
TIter nextb(t->GetListOfBranches());
while ((branch = (TBranch*)nextb())) {
branch->SetFile(newfile);
}
}
}
delete file;
gFile = newfile;
delete [] fname;
return newfile;
}
//______________________________________________________________________________
TTree *TTree::CloneTree(Int_t nentries, Option_t *)
{
// Create a clone of this tree and copy nentries
// By default copy all entries
// option is reserved for future use
// Note that only active branches are copied.
//
// IMPORTANT: Before invoking this function, the branch addresses
// of this TTree must have been set if one or more branches
// is not a basic type.
// For examples of CloneTree, see tutorials
// -copytree:
// Example of Root macro to copy a subset of a Tree to a new Tree
// The input file has been generated by the program in $ROOTSYS/test/Event
// with Event 1000 1 1 1
// -copytree2:
// Example of Root macro to copy a subset of a Tree to a new Tree
// One branch of the new Tree is written to a separate file
// The input file has been generated by the program in $ROOTSYS/test/Event
// with Event 1000 1 1 1
// we make a full copy of this tree
TTree *thistree = GetTree(); //in case this is a TChain
if (!thistree) {
GetEntry(0);
thistree = GetTree();
}
TTree *tree = (TTree*)thistree->Clone();
if (tree == 0) return 0;
tree->Reset();
// delete non active branches from the clone
Int_t i,j,k,l,nb1,nb2;
TObjArray *lb, *lb1;
TBranch *branch, *b1, *b2;
TObjArray *leaves = tree->GetListOfLeaves();
Int_t nleaves = leaves->GetEntriesFast();
for (l=0;l<nleaves;l++) {
TLeaf *leaf = (TLeaf*)leaves->UncheckedAt(l);
if (!leaf) continue;
branch = leaf->GetBranch();
if (!branch || !branch->TestBit(kDoNotProcess)) continue;
TObjArray *branches = tree->GetListOfBranches();
Int_t nb = branches->GetEntriesFast();
for (i=0;i<nb;i++) {
TBranch *br = (TBranch*)branches->UncheckedAt(i);
if (br == branch) {branches->RemoveAt(i); delete br; branches->Compress(); break;}
lb = br->GetListOfBranches();
nb1 = lb->GetEntriesFast();
for (j=0;j<nb1;j++) {
b1 = (TBranch*)lb->UncheckedAt(j);
if (!b1) continue;
if (b1 == branch) {lb->RemoveAt(j); delete b1; lb->Compress(); break;}
lb1 = b1->GetListOfBranches();
nb2 = lb1->GetEntriesFast();
for (k=0;k<nb2;k++) {
b2 = (TBranch*)lb1->UncheckedAt(k);
if (!b2) continue;
if (b2 == branch) {lb1->RemoveAt(k); delete b2; lb1->Compress(); break;}
}
}
}
}
leaves->Compress();
// copy branch addresses
tree->SetMakeClass(fMakeClass);
CopyAddresses(tree);
// may be copy some entries
if (nentries < 0) nentries = Int_t(fEntries);
if (nentries > fEntries) nentries = Int_t(fEntries);
for (i=0;i<nentries;i++) {
GetEntry(i);
tree->Fill();
}
return tree;
}
//______________________________________________________________________________
void TTree::CopyAddresses(TTree *tree)
{
// Set branch addresses of tree equal to the ones of this tree
// copy branch addresses starting from branches
Int_t i;
TObjArray *branches = GetListOfBranches();
Int_t nbranches = branches->GetEntriesFast();
for (i=0;i<nbranches;i++) {
TBranch *branch = (TBranch*)branches->UncheckedAt(i);
if (branch->TestBit(kDoNotProcess)) continue;
if (branch->GetAddress()) {
TBranch *br = tree->GetBranch(branch->GetName());
if (br) br->SetAddress(branch->GetAddress());
}
}
// copy branch addresses
TObjArray *tleaves = tree->GetListOfLeaves();
Int_t nleaves = tleaves->GetEntriesFast();
for (i=0;i<nleaves;i++) {
TLeaf *leaf2 = (TLeaf*)tleaves->UncheckedAt(i);
TBranch *branch2 = leaf2->GetBranch();
TBranch *branch = GetBranch(branch2->GetName());
if (!branch) continue;
TLeaf *leaf = branch->GetLeaf(leaf2->GetName());
if (!leaf) continue;
if (branch->TestBit(kDoNotProcess)) continue;
if (branch->GetAddress()) {
tree->SetBranchAddress(branch->GetName(),branch->GetAddress());
} else {
leaf2->SetAddress(leaf->GetValuePointer());
}
}
}
//______________________________________________________________________________
Int_t TTree::CopyEntries(TTree *tree, Int_t nentries)
{
// Copy nentries from tree to this tree
// By default copy all entries
// Return number of bytes copied to this tree.
if (tree == 0) return 0;
Int_t nbytes = 0;
Int_t treeEntries = Int_t(tree->GetEntries());
if (nentries < 0) nentries = treeEntries;
if (nentries > treeEntries) nentries = treeEntries;
for (Int_t i=0;i<nentries;i++) {
tree->GetEntry(i);
nbytes += Fill();
}
return nbytes;
}
//______________________________________________________________________________
TTree *TTree::CopyTree(const char *selection, Option_t *option, Int_t nentries, Int_t firstentry)
{
//*-*-*-*-*-*-*-*-*copy a Tree with selection*-*-*-*-*-*
//*-* ==========================
//
// IMPORTANT: Before invoking this function, the branch addresses
// of this TTree must have been set if one or more branches
// is not a basic type.
// For examples of CloneTree, see tutorials
// -copytree:
// Example of Root macro to copy a subset of a Tree to a new Tree
// The input file has been generated by the program in $ROOTSYS/test/Event
// with Event 1000 1 1 1
// -copytree2:
// Example of Root macro to copy a subset of a Tree to a new Tree
// One branch of the new Tree is written to a separate file
// The input file has been generated by the program in $ROOTSYS/test/Event
// with Event 1000 1 1 1
// -copytree3:
// Example of Root macro to copy a subset of a Tree to a new Tree
// Only selected entries are copied to the new Tree
//
// NOTE that only the active branches are copied.
GetPlayer();
if (fPlayer) return fPlayer->CopyTree(selection,option,nentries,firstentry);
return 0;
}
//______________________________________________________________________________
void TTree::Delete(Option_t *option)
{
//*-*-*-*-*-*-*-*-*Delete this tree from memory or/and disk
//*-* ========================================
//
// if option == "all" delete Tree object from memory AND from disk
// all baskets on disk are deleted. All keys with same name
// are deleted.
// if option =="" only Tree object in memory is deleted.
TFile *file = GetCurrentFile();
// delete all baskets and header from file
if (file && !strcmp(option,"all")) {
if (!file->IsWritable()) {
Error("Delete","File : %s is not writable, cannot delete Tree:%s", file->GetName(),GetName());
return;
}
//find key and import Tree header in memory
TKey *key = fDirectory->GetKey(GetName());
if (!key) return;
TDirectory *dirsav = gDirectory;
file->cd();
//get list of leaves and loop on all the branches baskets
TIter next(GetListOfLeaves());
TLeaf *leaf;
char header[16];
Int_t ntot = 0;
Int_t nbask = 0;
Int_t nbytes,objlen,keylen;
while ((leaf = (TLeaf*)next())) {
TBranch *branch = leaf->GetBranch();
Int_t nbaskets = branch->GetMaxBaskets();
for (Int_t i=0;i<nbaskets;i++) {
Int_t pos = branch->GetBasketSeek(i);
if (!pos) continue;
gFile->GetRecordHeader(header,pos,16,nbytes,objlen,keylen);
if (nbytes <= 0) continue;
gFile->MakeFree(pos,pos+nbytes-1);
ntot += nbytes;
nbask++;
}
}
// delete Tree header key and all keys with the same name
// A Tree may have been saved many times. Previous cycles are invalid.
while (key) {
ntot += key->GetNbytes();
key->Delete();
delete key;
key = fDirectory->GetKey(GetName());
}
if (dirsav) dirsav->cd();
if (gDebug) printf(" Deleting Tree: %s: %d baskets deleted. Total space freed = %d bytesn",GetName(),nbask,ntot);
}
if (fDirectory) fDirectory->GetList()->Remove(this);
fDirectory = 0;
// Delete object from CINT symbol table so it can not be used anymore.
gInterpreter->DeleteGlobal(this);
delete this;
}
//______________________________________________________________________________
Int_t TTree::Draw(const char *varexp, const TCut &selection, Option_t *option, Int_t nentries, Int_t firstentry)
{
//*-*-*-*-*-*-*-*-*-*-*Draw expression varexp for specified entries-*-*-*-*-*
//*-* ===========================================
//
// This function accepts TCut objects as arguments.
// Useful to use the string operator +
// example:
// ntuple.Draw("x",cut1+cut2+cut3);
//
return TTree::Draw(varexp, selection.GetTitle(), option, nentries, firstentry);
}
//______________________________________________________________________________
Int_t TTree::Draw(const char *varexp, const char *selection, Option_t *option,Int_t nentries, Int_t firstentry)
{
//*-*-*-*-*-*-*-*-*-*-*Draw expression varexp for specified entries-*-*-*-*-*
//*-* ===========================================
//
// varexp is an expression of the general form e1:e2:e3
// where e1,etc is a formula referencing a combination of the columns
// Example:
// varexp = x simplest case: draw a 1-Dim distribution of column named x
// = sqrt(x) : draw distribution of sqrt(x)
// = x*y/z
// = y:sqrt(x) 2-Dim dsitribution of y versus sqrt(x)
// Note that the variables e1, e2 or e3 may contain a selection.
// example, if e1= x*(y<0), the value histogrammed will be x if y<0
// and will be 0 otherwise.
//
// selection is an expression with a combination of the columns.
// In a selection all the C++ operators are authorized.
// The value corresponding to the selection expression is used as a weight
// to fill the histogram.
// If the expression includes only boolean operations, the result
// is 0 or 1. If the result is 0, the histogram is not filled.
// In general, the expression may be of the form:
// value*(boolean expression)
// if boolean expression is true, the histogram is filled with
// a weight = value.
// Examples:
// selection1 = "x<y && sqrt(z)>3.2"
// selection2 = "(x+y)*(sqrt(z)>3.2)"
// selection1 returns a weigth = 0 or 1
// selection2 returns a weight = x+y if sqrt(z)>3.2
// returns a weight = 0 otherwise.
//
// option is the drawing option
// see TH1::Draw for the list of all drawing options.
// If option contains the string "goff", no graphics is generated.
//
// nentries is the number of entries to process (default is all)
// first is the first entry to process (default is 0)
//
// This function returns the number of selected entries. It returns -1
// if an error occurs.
//
// Drawing expressions using arrays and array elements
// ===================================================
// Let assumes, a leaf fMatrix, on the branch fEvent, which is a 3 by 3 array,
// or a TClonesArray.
// In a TTree::Draw expression you can now access fMatrix using the following
// syntaxes:
//
// String passed What is used for each entry of the tree
//
// "fMatrix" the 9 elements of fMatrix
// "fMatrix[][]" the 9 elements of fMatrix
// "fMatrix[2][2]" only the elements fMatrix[2][2]
// "fMatrix[1]" the 3 elements fMatrix[1][0], fMatrix[1][1] and fMatrix[1][2]
// "fMatrix[1][]" the 3 elements fMatrix[1][0], fMatrix[1][1] and fMatrix[1][2]
// "fMatrix[][0]" the 3 elements fMatrix[0][0], fMatrix[1][0] and fMatrix[2][0]
//
// "fEvent.fMatrix...." same as "fMatrix..." (unless there is more than one leaf named fMatrix!).
//
// In summary, if a specific index is not specified for a dimension, TTree::Draw
// will loop through all the indices along this dimension. Leaving off the
// last (right most) dimension of specifying then with the two characters '[]'
// is equivalent. For variable size arrays (and TClonesArray) the range
// of the first dimension is recalculated for each entry of the tree.
//
// TTree::Draw also now properly handling operations involving 2 or more arrays.
//
// Let assume a second matrix fResults[5][2], here are a sample of some
// of the possible combinations, the number of elements they produce and
// the loop used:
//
// expression element(s) Loop
//
// "fMatrix[2][1] - fResults[5][2]" one no loop
// "fMatrix[2][] - fResults[5][2]" three on 2nd dim fMatrix
// "fMatrix[2][] - fResults[5][]" two on both 2nd dimensions
// "fMatrix[][2] - fResults[][1]" three on both 1st dimensions
// "fMatrix[][2] - fResults[][]" six on both 1st and 2nd dimensions of
// fResults
// "fMatrix[][2] - fResults[3][]" two on 1st dim of fMatrix and 2nd of
// fResults (at the same time)
// "fMatrix[][] - fResults[][]" six on 1st dim then on 2nd dim
//
//
// In summary, TTree::Draw loops through all un-specified dimensions. To
// figure out the range of each loop, we match each unspecified dimension
// from left to right (ignoring ALL dimensions for which an index has been
// specified), in the equivalent loop matched dimensions use the same index
// and are restricted to the smallest range (of only the matched dimensions).
// When involving variable arrays, the range can of course be different
// for each entry of the tree.
//
// So the loop equivalent to "fMatrix[][2] - fResults[3][]" is:
//
// for (Int_t i0; i < min(3,2); i++) {
// use the value of (fMatrix[i0][2] - fMatrix[3][i0])
// }
//
// So the loop equivalent to "fMatrix[][2] - fResults[][]" is:
//
// for (Int_t i0; i < min(3,5); i++) {
// for (Int_t i1; i1 < 2; i1++) {
// use the value of (fMatrix[i0][2] - fMatrix[i0][i1])
// }
// }
//
// So the loop equivalent to "fMatrix[][] - fResults[][]" is:
//
// for (Int_t i0; i < min(3,5); i++) {
// for (Int_t i1; i1 < min(3,2); i1++) {
// use the value of (fMatrix[i0][i1] - fMatrix[i0][i1])
// }
// }
//
// Saving the result of Draw to an histogram
// =========================================
// By default the temporary histogram created is called htemp.
// One can retrieve a pointer to this histogram with:
// TH1F *htemp = (TH1F*)gPad->GetPrimitive("htemp");
//
// If varexp0 contains >>hnew (following the variable(s) name(s),
// the new histogram created is called hnew and it is kept in the current
// directory (and also the current pad).
// Example:
// tree.Draw("sqrt(x)>>hsqrt","y>0")
// will draw sqrt(x) and save the histogram as "hsqrt" in the current
// directory.
// TH1F *hnew = (TH1F*)gDirectory->Get("hnew");
//
// By default, the specified histogram is reset.
// To continue to append data to an existing histogram, use "+" in front
// of the histogram name;
// tree.Draw("sqrt(x)>>+hsqrt","y>0")
// will not reset hsqrt, but will continue filling.
//
// Special functions and variables
// ===============================
//
// Entry$: A TTree::Draw formula can use the special variable Entry$
// to access the entry number being read. For example to draw every
// other entry use:
// tree.Draw("myvar","Entry$%2==0");
//
// Entry$ : return the current entry number (== TTree::GetReadEntry())
// Entries$ : return the total number of entries (== TTree::GetEntries())
// Length$ : return the total number of element of this formula for this
// entry (==TTreeFormula::GetNdata())
// Iteration$: return the current iteration over this formula for this
// entry (i.e. varies from 0 to Length$).
//
// Making a Profile histogram
// ==========================
// In case of a 2-Dim expression, one can generate a TProfile histogram
// instead of a TH2F histogram by specyfying option=prof or option=profs.
// The option=prof is automatically selected in case of y:x>>pf
// where pf is an existing TProfile histogram.
//
// Saving the result of Draw to a TEventList
// =========================================
// TTree::Draw can be used to fill a TEventList object (list of entry numbers)
// instead of histogramming one variable.
// If varexp0 has the form >>elist , a TEventList object named "elist"
// is created in the current directory. elist will contain the list
// of entry numbers satisfying the current selection.
// Example:
// tree.Draw(">>yplus","y>0")
// will create a TEventList object named "yplus" in the current directory.
// In an interactive session, one can type (after TTree::Draw)
// yplus.Print("all")
// to print the list of entry numbers in the list.
//
// By default, the specified entry list is reset.
// To continue to append data to an existing list, use "+" in front
// of the list name;
// tree.Draw(">>+yplus","y>0")
// will not reset yplus, but will enter the selected entries at the end
// of the existing list.
//
// Using a TEventList as Input
// ===========================
// Once a TEventList object has been generated, it can be used as input
// for TTree::Draw. Use TTree::SetEventList to set the current event list
// Example:
// TEventList *elist = (TEventList*)gDirectory->Get("yplus");
// tree->SetEventList(elist);
// tree->Draw("py");
//
// If arrays are used in the selection critera, the entry entered in the
// list are all the entries that have at least one element of the array that
// satisfy the selection.
// Example:
// tree.Draw(">>pyplus","fTracks.fPy>0");
// tree->SetEventList(pyplus);
// tree->Draw("fTracks.fPy");
// will draw the fPy of ALL tracks in event with at least one track with
// a positive fPy.
//
// To select only the elements that did match the original selection
// use TEventList::SetReapplyCut.
// Example:
// tree.Draw(">>pyplus","fTracks.fPy>0");
// pyplus->SetReapplyCut(kTRUE);
// tree->SetEventList(pyplus);
// tree->Draw("fTracks.fPy");
// will draw the fPy of only the tracks that have a positive fPy.
//
// Note: Use tree->SetEventList(0) if you do not want use the list as input.
//
// How to obtain more info from TTree::Draw
// ========================================
//
// Once TTree::Draw has been called, it is possible to access useful
// information still stored in the TTree object via the following functions:
// -GetSelectedRows() // return the number of entries accepted by the
// //selection expression. In case where no selection
// //was specified, returns the number of entries processed.
// -GetV1() //returns a pointer to the double array of V1
// -GetV2() //returns a pointer to the double array of V2
// -GetV3() //returns a pointer to the double array of V3
// -GetW() //returns a pointer to the double array of Weights
// //where weight equal the result of the selection expression.
// where V1,V2,V3 correspond to the expressions in
// TTree::Draw("V1:V2:V3",selection);
//
// Example:
// Root > ntuple->Draw("py:px","pz>4");
// Root > TGraph *gr = new TGraph(ntuple->GetSelectedRows(),
// ntuple->GetV2(), ntuple->GetV1());
// Root > gr->Draw("ap"); //draw graph in current pad
// creates a TGraph object with a number of points corresponding to the
// number of entries selected by the expression "pz>4", the x points of the graph
// being the px values of the Tree and the y points the py values.
//
// Important note: By default TTree::Draw creates the arrays obtained
// with GetV1, GetV2, GetV3, GetW with a length corresponding to the
// parameter fEstimate. By default fEstimate=10000 and can be modified
// via TTree::SetEstimate. A possible recipee is to do
// tree->SetEstimate(tree->GetEntries());
// You must call SetEstimate if the expected number of selected rows
// is greater than 10000.
//
// You can use the option "goff" to turn off the graphics output
// of TTree::Draw in the above example.
//
// Automatic interface to TTree::Draw via the TTreeViewer
// ======================================================
//
// A complete graphical interface to this function is implemented
// in the class TTreeViewer.
// To start the TTreeViewer, three possibilities:
// - select TTree context menu item "StartViewer"
// - type the command "TTreeViewer TV(treeName)"
// - execute statement "tree->StartViewer();"
//
GetPlayer();
if (fPlayer) return fPlayer->DrawSelect(varexp,selection,option,nentries,firstentry);
else return -1;
}
//______________________________________________________________________________
void TTree::DropBuffers(Int_t)
{
//*-*-*-*-*Drop branch buffers to accomodate nbytes below MaxVirtualsize*-*-*-*
// Be careful not to remove current read/write buffers
Int_t i,j;
Int_t ndrop = 0;
Int_t nleaves = fLeaves.GetEntriesFast();
TLeaf *leaf;
TBranch *branch;
TBasket *basket;
for (i=0;i<nleaves;i++) {
leaf = (TLeaf*)fLeaves.UncheckedAt(i);
branch = (TBranch*)leaf->GetBranch();
Int_t nbaskets = branch->GetListOfBaskets()->GetEntriesFast();
for (j=0;j<nbaskets-1;j++) {
if (j == branch->GetReadBasket() || j == branch->GetWriteBasket()) continue;
basket = branch->GetBasket(j);
ndrop += basket->DropBuffers();
if (fTotalBuffers < fMaxVirtualSize) return;
}
}
}
//______________________________________________________________________________
Int_t TTree::Fill()
{
//*-*-*-*-*Fill all branches of a Tree*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
//*-* ===========================
//
// This function loops on all the branches of this tree.
// For each branch, it copies to the branch buffer (basket) the current
// values of the leaves data types.
// If a leaf is a simple data type, a simple conversion to a machine
// independent format has to be done.
//
Int_t i;
Int_t nbytes = 0;
Int_t nb = fBranches.GetEntriesFast();
TBranch *branch;
//case of one single super branch. Automatically update
// all the branch addresses if a new object was created
if (nb == 1) {
branch = (TBranch*)fBranches.UncheckedAt(0);
branch->UpdateAddress();
}
for (i=0;i<nb;i++) {
branch = (TBranch*)fBranches.UncheckedAt(i);
if (branch->TestBit(kDoNotProcess)) continue;
nbytes += branch->Fill();
}
fEntries++;
if (fTotBytes-fSavedBytes > fAutoSave) AutoSave();
//check that output file is still below the maximum size.
//If above, close the current file and continue on a new file.
//Currently, the automatic change of file is restricted
//to the case where the Tree is in the top level directory.
if (!fDirectory) return nbytes;
TFile *file = fDirectory->GetFile();
if (file && file->GetEND() > (Double_t)fgMaxTreeSize) {
if (fDirectory == (TDirectory*)file) ChangeFile(file);
}
return nbytes;
}
//______________________________________________________________________________
TBranch *TTree::FindBranch(const char* branchname)
{
char name[kMaxLen];
TIter next(GetListOfBranches());
// This will allow the branchname to be preceded by
// the name of this tree.
char *subbranch = (char*)strstr(branchname,GetName());
if (subbranch!=branchname) subbranch = 0;
if (subbranch) {
subbranch += strlen(GetName());
if ( *subbranch != '.' ) subbranch = 0;
else subbranch ++;
}
TBranch *branch;
while ((branch = (TBranch*)next())) {
strcpy(name,branch->GetName());
char *dim = (char*)strstr(name,"[");
if (dim) dim[0]='0';
if (!strcmp(branchname,name)) return branch;
if (subbranch && !strcmp(subbranch,name)) return branch;
TBranch *nestedbranch = branch->FindBranch(branchname);
if (nestedbranch) return nestedbranch;
}
//search in list of friends
if (!fFriends) return 0;
TIter nextf(fFriends);
TFriendElement *fe;
while ((fe = (TFriendElement*)nextf())) {
TTree *t = fe->GetTree();
if (t==0) continue;
// If the alias is present replace it with the real name.
char *subbranch = (char*)strstr(branchname,fe->GetName());
if (subbranch!=branchname) subbranch = 0;
if (subbranch) {
subbranch += strlen(fe->GetName());
if ( *subbranch != '.' ) subbranch = 0;
else subbranch ++;
}
if (subbranch) {
sprintf(name,"%s.%s",t->GetName(),subbranch);
} else {
strcpy(name,branchname);
}
branch = t->FindBranch(name);
if (branch) return branch;
}
return 0;
}
//______________________________________________________________________________
TLeaf *TTree::FindLeaf(const char* searchname)
{
char leafname[kMaxLen];
char leaftitle[kMaxLen];
char longname[kMaxLen];
char longtitle[kMaxLen];
// This will allow the branchname to be preceded by
// the name of this tree.
char *subsearchname = (char*)strstr(searchname,GetName());
if (subsearchname!=searchname) subsearchname = 0;
if (subsearchname) {
subsearchname += strlen(GetName());
if ( *subsearchname != '.' ) subsearchname = 0;
else subsearchname ++;
}
// For leaves we allow for one level up to be prefixed to the
// name
TIter next (GetListOfLeaves());
TLeaf *leaf;
while ((leaf = (TLeaf*)next())) {
strcpy(leafname,leaf->GetName());
char *dim = (char*)strstr(leafname,"[");
if (dim) dim[0]='0';
if (!strcmp(searchname,leafname)) return leaf;
if (subsearchname && !strcmp(subsearchname,leafname)) return leaf;
// The TLeafElement contains the branch name in its name,
// let's use the title....
strcpy(leaftitle,leaf->GetTitle());
dim = (char*)strstr(leaftitle,"[");
if (dim) dim[0]='0';
if (!strcmp(searchname,leaftitle)) return leaf;
if (subsearchname && !strcmp(subsearchname,leaftitle)) return leaf;
TBranch * branch = leaf->GetBranch();
if (branch) {
sprintf(longname,"%s.%s",branch->GetName(),leafname);
char *dim = (char*)strstr(longname,"[");
if (dim) dim[0]='0';
if (!strcmp(searchname,longname)) return leaf;
if (subsearchname && !strcmp(subsearchname,longname)) return leaf;
sprintf(longtitle,"%s.%s",branch->GetName(),leaftitle);
dim = (char*)strstr(longtitle,"[");
if (dim) dim[0]='0';
if (!strcmp(searchname,longtitle)) return leaf;
if (subsearchname && !strcmp(subsearchname,longtitle)) return leaf;
// The following is for the case where the branch is only
// a sub-branch. Since we do not see it through
// TTree::GetListOfBranches, we need to see it indirectly.
// This is the less sturdy part of this search ... it may
// need refining ...
if (strstr(searchname,".")
&& !strcmp(searchname,branch->GetName())) return leaf;
if (subsearchname && strstr(subsearchname,".")
&& !strcmp(subsearchname,branch->GetName())) return leaf;
//printf("found leaf3=%s/%s, branch=%s, i=%dn",leaf->GetName(),leaf->GetTitle(),branch->GetName(),i);
}
}
//search in list of friends
if (!fFriends) return 0;
TIter nextf(fFriends);
TFriendElement *fe;
while ((fe = (TFriendElement*)nextf())) {
TTree *t = fe->GetTree();
if (t==0) continue;
// If the alias is present replace it with the real name.
char *subsearchname = (char*)strstr(searchname,fe->GetName());
if (subsearchname!=searchname) subsearchname = 0;
if (subsearchname) {
subsearchname += strlen(fe->GetName());
if ( *subsearchname != '.' ) subsearchname = 0;
else subsearchname ++;
}
if (subsearchname) {
sprintf(leafname,"%s.%s",t->GetName(),subsearchname);
} else {
strcpy(leafname,searchname);
}
leaf = t->FindLeaf(leafname);
if (leaf) return leaf;
}
return 0;
}
//______________________________________________________________________________
Int_t TTree::Fit(const char *funcname ,const char *varexp, const char *selection,Option_t *option ,Option_t *goption,Int_t nentries, Int_t firstentry)
{
//*-*-*-*-*-*-*-*-*Fit a projected item(s) from a Tree*-*-*-*-*-*-*-*-*-*
//*-* ======================================
//
// funcname is a TF1 function.
//
// See TTree::Draw for explanations of the other parameters.
//
// By default the temporary histogram created is called htemp.
// If varexp contains >>hnew , the new histogram created is called hnew
// and it is kept in the current directory.
//
// The function returns the number of selected entries.
//
// Example:
// tree.Fit(pol4,sqrt(x)>>hsqrt,y>0)
// will fit sqrt(x) and save the histogram as "hsqrt" in the current
// directory.
//
// See also TTree::UnbinnedFit
GetPlayer();
if (fPlayer) return fPlayer->Fit(funcname,varexp,selection,option,goption,nentries,firstentry);
else return -1;
}
//______________________________________________________________________________
TBranch *TTree::GetBranch(const char *name)
{
// Return pointer to the branch with name in this Tree or the list
// of friends of this tree.
Int_t i,j,k,nb1,nb2;
TObjArray *lb, *lb1;
TBranch *branch, *b1, *b2;
Int_t nb = fBranches.GetEntriesFast();
for (i=0;i<nb;i++) {
branch = (TBranch*)fBranches.UncheckedAt(i);
if (!strcmp(branch->GetName(),name)) return branch;
lb = branch->GetListOfBranches();
nb1 = lb->GetEntriesFast();
for (j=0;j<nb1;j++) {
b1 = (TBranch*)lb->UncheckedAt(j);
if (!b1) continue;
if (!strcmp(b1->GetName(),name)) return b1;
lb1 = b1->GetListOfBranches();
nb2 = lb1->GetEntriesFast();
for (k=0;k<nb2;k++) {
b2 = (TBranch*)lb1->UncheckedAt(k);
if (!b2) continue;
if (!strcmp(b2->GetName(),name)) return b2;
}
}
}
TObjArray *leaves = ((TTree*)this)->GetListOfLeaves();
Int_t nleaves = leaves->GetEntriesFast();
for (i=0;i<nleaves;i++) {
TLeaf *leaf = (TLeaf*)leaves->UncheckedAt(i);
branch = leaf->GetBranch();
if (!strcmp(branch->GetName(),name)) return branch;
}
//search in list of friends
if (!fFriends) return 0;
TIter next(fFriends);
TFriendElement *fe;
while ((fe = (TFriendElement*)next())) {
TTree *t = fe->GetTree();
if (t) {
branch = t->GetBranch(name);
if (branch) return branch;
}
}
//second pass in the list of friends when the branch name
//is prefixed by the tree name
next.Reset();
while ((fe = (TFriendElement*)next())) {
TTree *t = fe->GetTree();
if (t==0) continue;
char *subname = (char*)strstr(name,fe->GetName());
if (subname != name) continue;
Int_t l = strlen(fe->GetName());
subname += l;
if (*subname != '.') continue;
subname++;
branch = t->GetBranch(subname);
if (branch) return branch;
}
return 0;
}
//______________________________________________________________________________
Bool_t TTree::GetBranchStatus(const char *branchname) const
{
// return status of branch with name branchname
// 0 if branch is not activated
// 1 if branch is activated
TBranch *br = ((TTree*)this)->GetBranch(branchname);
if (br) return (br->TestBit(kDoNotProcess) == 0);
return 0;
}
//______________________________________________________________________________
Int_t TTree::GetBranchStyle()
{
// static function returning the current branch style
// style = 0 old Branch
// style = 1 new Bronch
return fgBranchStyle;
}
//______________________________________________________________________________
TFile *TTree::GetCurrentFile() const
{
//*-*-*-*-*-*Return pointer to the current file*-*-*-*-*-*-*-*
//*-* ==================================
if (!fDirectory) return 0;
return fDirectory->GetFile();
}
//______________________________________________________________________________
Stat_t TTree::GetEntriesFriend() const
{
// return number of entries of this Tree if not zero
// otherwise return the number of entries in the first friend Tree.
if (fEntries) return fEntries;
if (!fFriends) return 0;
TFriendElement *fr = (TFriendElement*)fFriends->At(0);
if (!fr) return 0;
TTree *t = fr->GetTree();
if (t==0) return 0;
return t->GetEntriesFriend();
}
//______________________________________________________________________________
Int_t TTree::GetEntry(Int_t entry, Int_t getall)
{
//*-*-*-*-*-*Read all branches of entry and return total number of bytes*-*-*
//*-* ===========================================================
// getall = 0 : get only active branches
// getall = 1 : get all branches
//
// 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.
//
// If the Tree has friends, also read the friends entry
//
// To activate/deactivate one or more branches, use TBranch::SetBranchStatus
// For example, if you have a Tree with several hundred branches, and you
// are interested only by branches named "u" and "v", do
// mytree.SetBranchStatus("*",0); //disable all branches
// mytree.SetBranchStatus("a",1);
// mytree.SetBranchStatus("b",1);
// when calling mytree.GetEntry(i); only branches "a" and "b" will be read.
//
// An alternative is to call directly
// brancha.GetEntry(i)
// branchb.GetEntry(i);
//
// IMPORTANT NOTE
// ==============
// By default, GetEntry reuses the space allocated by the previous object
// for each branch. You can force the previous object to be automatically
// deleted if you call mybranch.SetAutoDelete(kTRUE) (default is kFALSE).
// Example:
// Consider the example in $ROOTSYS/test/Event.h
// The top level branch in the tree T is declared with:
// Event *event = 0; //event must be null or point to a valid object
// //it must be initialized
// T.SetBranchAddress("event",&event);
// When reading the Tree, one can choose one of these 3 options:
//
// OPTION 1
// --------
//
// for (Int_t i=0;i<nentries;i++) {
// T.GetEntry(i);
// // the objrect event has been filled at this point
// }
// The default (recommended). At the first entry an object of the
// class Event will be created and pointed by event.
// At the following entries, event will be overwritten by the new data.
// All internal members that are TObject* are automatically deleted.
// It is important that these members be in a valid state when GetEntry
// is called. Pointers must be correctly initialized.
// However these internal members will not be deleted if the characters "->"
// are specified as the first characters in the comment field of the data
// member declaration.
// If "->" is specified, the pointer member is read via pointer->Streamer(buf).
// In this case, it is assumed that the pointer is never null (case
// of pointer TClonesArray *fTracks in the Event example).
// If "->" is not specified, the pointer member is read via buf >> pointer.
// In this case the pointer may be null. Note that the option with "->"
// is faster to read or write and it also consumes less space in the file.
//
// OPTION 2
// --------
// The option AutoDelete is set
// TBranch *branch = T.GetBranch("event");
// branch->SetAddress(&event);
// branch->SetAutoDelete(kTRUE);
// for (Int_t i=0;i<nentries;i++) {
// T.GetEntry(i);
// // the objrect event has been filled at this point
// }
// In this case, at each iteration, the object event is deleted by GetEntry
// and a new instance of Event is created and filled.
//
// OPTION 3
// --------
// Same as option 1, but you delete yourself the event.
// for (Int_t i=0;i<nentries;i++) {
// delete event;
// event = 0; // EXTREMELY IMPORTANT
// T.GetEntry(i);
// // the objrect event has been filled at this point
// }
//
// It is strongly recommended to use the default option 1. It has the
// additional advantage that functions like TTree::Draw (internally
// calling TTree::GetEntry) will be functional even when the classes in the
// file are not available.
if (entry < 0 || entry >= fEntries) return 0;
Int_t i;
Int_t nbytes = 0;
fReadEntry = entry;
TBranch *branch;
Int_t nbranches = fBranches.GetEntriesFast();
Int_t nb;
for (i=0;i<nbranches;i++) {
branch = (TBranch*)fBranches.UncheckedAt(i);
nb = branch->GetEntry(entry, getall);
if (nb < 0) return nb;
nbytes += nb;
}
// GetEntry in list of friends
if (!fFriends) return nbytes;
TIter nextf(fFriends);
TFriendElement *fe;
while ((fe = (TFriendElement*)nextf())) {
TTree *t = fe->GetTree();
if (t) {
nb = t->GetEntry(entry, getall);
if (nb < 0) return nb;
nbytes += nb;
}
}
return nbytes;
}
//______________________________________________________________________________
Int_t TTree::GetEntryNumber(Int_t entry) const
{
//*-*-*-*-*-*Return entry number corresponding to entry*-*-*
//*-* ==========================================
// if no selection list returns entry
// else returns the entry number corresponding to the list index=entry
if (!fEventList) return entry;
return fEventList->GetEntry(entry);
}
//______________________________________________________________________________
Int_t TTree::GetEntryNumberWithBestIndex(Int_t major, Int_t minor) const
{
// Return entry number corresponding to major and minor number
// Note that this function returns only the entry number, not the data
// To read the data corresponding to an entry number, use TTree::GetEntryWithIndex
// the BuildIndex function has created a table of Double_t* of sorted values
// corresponding to val = major + minor*1e-9;
// The function performs binary search in this sorted table.
// If it finds a pair that maches val, it returns directly the
// index in the table.
// If an entry corresponding to major and minor is not found, the function
// returns the index of the major,minor pair immediatly lower than the
// requested value, ie it will return -1 if the pair is lower than
// the first entry in the index.
//
// See also GetEntryNumberWithIndex
if (fIndex.fN == 0) return -1;
Double_t value = major + minor*1e-9;
Int_t i = TMath::BinarySearch(Int_t(fEntries), fIndexValues.fArray, value);
if (i < 0) return -1;
return fIndex.fArray[i];
}
//______________________________________________________________________________
Int_t TTree::GetEntryNumberWithIndex(Int_t major, Int_t minor) const
{
// Return entry number corresponding to major and minor number
// Note that this function returns only the entry number, not the data
// To read the data corresponding to an entry number, use TTree::GetEntryWithIndex
// the BuildIndex function has created a table of Double_t* of sorted values
// corresponding to val = major + minor*1e-9;
// The function performs binary search in this sorted table.
// If it finds a pair that maches val, it returns directly the
// index in the table, otherwise it returns -1.
//
// See also GetEntryNumberWithBestIndex
if (fIndex.fN == 0) return -1;
Double_t value = major + minor*1e-9;
Int_t i = TMath::BinarySearch(Int_t(fEntries), fIndexValues.fArray, value);
if (i < 0) return -1;
if (TMath::Abs(fIndexValues.fArray[i] - value) > 1.e-10) return -1;
return fIndex.fArray[i];
}
//______________________________________________________________________________
Int_t TTree::GetEntryWithIndex(Int_t major, Int_t minor)
{
// Return entry corresponding to major and minor number
// For example:
// Int_t run = 1234;
// Int_t event = 345;
// Int_t serial= tree.GetEntryNumberWithIndex(run,event);
// now the variable serial is in the range [0,nentries] and one can do
// tree.GetEntry(serial);
Int_t serial = GetEntryNumberWithIndex(major, minor);
if (serial < 0) return -1;
return GetEntry(serial);
}
//______________________________________________________________________________
const char *TTree::GetFriendAlias(TTree *tree) const
{
// If the the 'tree' is a friend, this method returns its alias name
if (!fFriends) return 0;
TIter nextf(fFriends);
TFriendElement *fe;
while ((fe = (TFriendElement*)nextf())) {
TTree *t = fe->GetTree();
if (t==tree) return fe->GetName();
}
return 0;
}
//______________________________________________________________________________
TIterator* TTree::GetIteratorOnAllLeaves(Bool_t dir)
{
// Creates a new iterator that will go through all the leaves on the tree
// itself and its friend.
return new TTreeFriendLeafIter(this,dir);
}
//______________________________________________________________________________
TLeaf *TTree::GetLeaf(const char *aname)
{
// Return pointer to the 1st Leaf named name in any Branch of this Tree
// or any branch in the list of friend trees.
//
// aname may be of the form branchname/leafname
char *slash = (char*)strchr(aname,'/');
char *name;
Int_t nbch = 0;
if (slash) {
name = slash+1;
nbch = slash-aname;
} else {
name = (char*)aname;
}
TLeaf *leaf = 0;
TIter nextl(GetListOfLeaves());
while ((leaf = (TLeaf*)nextl())) {
if (strcmp(leaf->GetName(),name)) continue;
if (slash) {
if (strncmp(leaf->GetBranch()->GetName(),aname,nbch)) continue;
}
return leaf;
}
if (!fFriends) return 0;
TIter next(fFriends);
TFriendElement *fe;
while ((fe = (TFriendElement*)next())) {
TTree *t = fe->GetTree();
if (t) {
leaf = t->GetLeaf(aname);
if (leaf) return leaf;
}
}
//second pass in the list of friends when the leaf name
//is prefixed by the tree name
char strippedArg[2*kMaxLen];
next.Reset();
while ((fe = (TFriendElement*)next())) {
TTree *t = fe->GetTree();
if (t==0) continue;
char *subname = (char*)strstr(name,fe->GetName());
if (subname != name) continue;
Int_t l = strlen(fe->GetName());
subname += l;
if (*subname != '.') continue;
subname++;
if (slash) {
strncpy(strippedArg,aname,nbch+1);
strippedArg[nbch+1] = 0;
} else {
strippedArg[0] = 0;
}
strcat(strippedArg,subname);
leaf = t->GetLeaf(strippedArg);
if (leaf) return leaf;
}
return 0;
}
//______________________________________________________________________________
Double_t TTree::GetMaximum(const char *columname)
{
//*-*-*-*-*-*-*-*-*Return maximum of column with name columname*-*-*-*-*-*-*
//*-* ============================================
TLeaf *leaf = this->GetLeaf(columname);
if (!leaf) return 0;
TBranch *branch = leaf->GetBranch();
Double_t cmax = -FLT_MAX; //in float.h
for (Int_t i=0;i<fEntries;i++) {
branch->GetEntry(i);
for (Int_t j=0;j<leaf->GetLen();j++) {
Double_t val = leaf->GetValue(j);
if (val > cmax) cmax = val;
}
}
return cmax;
}
//______________________________________________________________________________
Int_t TTree::GetMaxTreeSize()
{
// static function
// return maximum size of a Tree file
return fgMaxTreeSize;
}
//______________________________________________________________________________
Double_t TTree::GetMinimum(const char *columname)
{
//*-*-*-*-*-*-*-*-*Return minimum of column with name columname*-*-*-*-*-*-*
//*-* ============================================
TLeaf *leaf = this->GetLeaf(columname);
if (!leaf) return 0;
TBranch *branch = leaf->GetBranch();
Double_t cmin = FLT_MAX; //in float.h
for (Int_t i=0;i<fEntries;i++) {
branch->GetEntry(i);
for (Int_t j=0;j<leaf->GetLen();j++) {
Double_t val = leaf->GetValue(j);
if (val < cmin) cmin = val;
}
}
return cmin;
}
//______________________________________________________________________________
const char *TTree::GetNameByIndex(TString &varexp, Int_t *index,Int_t colindex) const
{
//*-*-*-*-*-*-*-*-*Return name corresponding to colindex in varexp*-*-*-*-*-*
//*-* ===============================================
//
// varexp is a string of names separated by :
// index is an array with pointers to the start of name[i] in varexp
//
Int_t i1,n;
static TString column;
if (colindex<0 ) return "";
i1 = index[colindex] + 1;
n = index[colindex+1] - i1;
column = varexp(i1,n);
// return (const char*)Form((const char*)column);
return column.Data();
}
//______________________________________________________________________________
TVirtualTreePlayer *TTree::GetPlayer()
{
// Load the TTreePlayer (if not already done)
// Pointer to player is fPlayer
if (fPlayer) return fPlayer;
fPlayer = TVirtualTreePlayer::TreePlayer(this);
return fPlayer;
}
//______________________________________________________________________________
Int_t TTree::LoadTree(Int_t entry)
{
//*-*-*-*-*-*-*-*-*Set current Tree entry
//*-* ======================
// this function is overloaded in TChain
if (fNotify) {
if (fReadEntry < 0) fNotify->Notify();
}
fReadEntry = entry;
if (fFriends) {
// The current tree has not changed but some of its friend might.
//An Alternative would move this code to each of the function calling LoadTree
//(and to overload a few more).
TIter nextf(fFriends);
TFriendElement *fe;
Bool_t needUpdate = kFALSE;
while ((fe = (TFriendElement*)nextf())) {
TTree *t = fe->GetTree();
if (t->IsA()!=TTree::Class()) {
Int_t oldNumber = t->GetTreeNumber();
t->LoadTree(entry);
Int_t newNumber = t->GetTreeNumber();
if (oldNumber!=newNumber) {
// We can not just compare the tree pointers because they could be reused.
// So we compare the tree number instead.
needUpdate = kTRUE;
}
} else {
// we assume it is a simple tree so we have nothing to do.
t->LoadTree(entry);
}
} // for each friend
if (needUpdate) {
//update list of leaves in all TTreeFormula of the TTreePlayer (if any)
if (fPlayer) fPlayer->UpdateFormulaLeaves();
//Notify user if requested
if (fNotify) fNotify->Notify();
}
}
return fReadEntry;
}
//______________________________________________________________________________
Int_t TTree::MakeSelector(const char *selector)
{
//====>
//*-*-*-*-*-*-*Generate skeleton selector class for this Tree*-*-*-*-*-*-*
//*-* ==============================================
//
// The following files are produced: selector.h and selector.C
// if selector is NULL, selector will be nameoftree.
//
// The generated code in selector.h includes the following:
// - Identification of the original Tree and Input file name
// - Definition of selector class (data and functions)
// - the following class functions:
// - constructor and destructor
// - void Begin(TTree *tree)
// - void Init(TTree *tree)
// - Bool_t Notify()
// - Bool_t Process(Int-t entry)
// - void Terminate
//
// The class selector derives from TSelector.
// The generated code in selector.C includes empty functions defined above:
//
// To use this function:
// - connect your Tree file (eg: TFile f("myfile.root");)
// - T->MakeSelector("myselect");
// where T is the name of the Tree in file myfile.root
// and myselect.h, myselect.C the name of the files created by this function.
// In a Root session, you can do:
// Root > T->Process("select.C")
//
//====>
return MakeClass(selector,"selector");
}
//______________________________________________________________________________
Int_t TTree::MakeClass(const char *classname, Option_t *option)
{
//====>
//*-*-*-*-*-*-*Generate skeleton analysis class for this Tree*-*-*-*-*-*-*
//*-* ==============================================
//
// The following files are produced: classname.h and classname.C
// if classname is NULL, classname will be nameoftree.
//
// When the option "anal" is specified, the function generates the
// analysis class described in TTree::makeAnal.
//
// The generated code in classname.h includes the following:
// - Identification of the original Tree and Input file name
// - Definition of analysis class (data and functions)
// - the following class functions:
// -constructor (connecting by default the Tree file)
// -GetEntry(Int_t entry)
// -Init(TTree *tree) to initialize a new TTree
// -Show(Int_t entry) to read and Dump entry
//
// The generated code in classname.C includes only the main
// analysis function Loop.
//
// To use this function:
// - connect your Tree file (eg: TFile f("myfile.root");)
// - T->MakeClass("MyClass");
// where T is the name of the Tree in file myfile.root
// and MyClass.h, MyClass.C the name of the files created by this function.
// In a Root session, you can do:
// Root > .L MyClass.C
// Root > MyClass t
// Root > t.GetEntry(12); // Fill t data members with entry number 12
// Root > t.Show(); // Show values of entry 12
// Root > t.Show(16); // Read and show values of entry 16
// Root > t.Loop(); // Loop on all entries
//
//====>
GetPlayer();
if (!fPlayer) return 0;
return fPlayer->MakeClass(classname,option);
}
//______________________________________________________________________________
Int_t TTree::MakeCode(const char *filename)
{
//====>
//*-*-*-*-*-*-*-*-*Generate skeleton function for this Tree*-*-*-*-*-*-*
//*-* ========================================
//
// The function code is written on filename
// if filename is NULL, filename will be nameoftree.C
//
// The generated code includes the following:
// - Identification of the original Tree and Input file name
// - Connection of the Tree file
// - Declaration of Tree variables
// - Setting of branches addresses
// - a skeleton for the entry loop
//
// To use this function:
// - connect your Tree file (eg: TFile f("myfile.root");)
// - T->MakeCode("anal.C");
// where T is the name of the Tree in file myfile.root
// and anal.C the name of the file created by this function.
//
// NOTE: Since the implementation of this function, a new and better
// function TTree::MakeClass has been developped.
//
// Author: Rene Brun
//====>
Warning("MakeCode","MakeCode is obsolete. Use MakeClass or MakeSelector instead");
GetPlayer();
if (!fPlayer) return 0;
return fPlayer->MakeCode(filename);
}
//______________________________________________________________________________
void TTree::MakeIndex(TString &varexp, Int_t *index)
{
//*-*-*-*-*-*-*-*-*Build Index array for names in varexp*-*-*-*-*-*-*-*-*-*-*
//*-* =====================================
Int_t ivar = 1;
index[0] = -1;
for (Int_t i=0;i<varexp.Length();i++) {
if (varexp[i] == ':') {
index[ivar] = i;
ivar++;
}
}
index[ivar] = varexp.Length();
}
//______________________________________________________________________________
Bool_t TTree::MemoryFull(Int_t nbytes)
{
//*-*-*-*-*-*Check if adding nbytes to memory we are still below MaxVirtualsize
//*-* ==================================================================
if (fTotalBuffers + nbytes < fMaxVirtualSize) return kFALSE;
return kTRUE;
}
//______________________________________________________________________________
Bool_t TTree::Notify()
{
// function called when loading a new class library
TIter next(GetListOfLeaves());
TLeaf *leaf;
while ((leaf = (TLeaf*)next())) {
leaf->Notify();
leaf->GetBranch()->Notify();
}
return kTRUE;
}
//______________________________________________________________________________
TPrincipal *TTree::Principal(const char *varexp, const char *selection, Option_t *option, Int_t nentries, Int_t firstentry)
{
//*-*-*-*-*-*-*-*-*Interface to the Principal Components Analysis class*-*-*
//*-* ====================================================
//
// Create an instance of TPrincipal
// Fill it with the selected variables
// if option "n" is specified, the TPrincipal object is filled with
// normalized variables.
// If option "p" is specified, compute the principal components
// If option "p" and "d" print results of analysis
// If option "p" and "h" generate standard histograms
// If option "p" and "c" generate code of conversion functions
// return a pointer to the TPrincipal object. It is the user responsability
// to delete this object.
// The option default value is "np"
//
// see TTree::Draw for explanation of the other parameters.
//
// The created object is named "principal" and a reference to it
// is added to the list of specials Root objects.
// you can retrieve a pointer to the created object via:
// TPrincipal *principal =
// (TPrincipal*)gROOT->GetListOfSpecials()->FindObject("principal");
//
GetPlayer();
if (fPlayer) return fPlayer->Principal(varexp,selection,option,nentries,firstentry);
else return 0;
}
//______________________________________________________________________________
void TTree::Print(Option_t *option) const
{
// Print a summary of the Tree contents.
// if option contains "all" friend trees are also printed.
// if option contains "toponly" only the top level branches are printed.
//
// Wildcarding can be used to print only a subset of the branches
// eg, T.Print("Elec*") will print all branches with name starting with "Elec"
if (!strcasecmp(option, "p") || !strcasecmp(option, "pa")) {
#ifdef NEVER
TPacketGenerator *t = GetPacketGenerator();
if (!t) {
Printf("No TPacketGenerator object available");
return;
}
if (!strcasecmp(option, "p"))
t->Print();
else
t->Print("all");
return;
#endif
}
Int_t s = 0;
Int_t skey = 0;
if (fDirectory) {
TKey *key = fDirectory->GetKey(GetName());
if (key) {skey = key->GetKeylen(); s = key->GetNbytes();}
}
Double_t total = fTotBytes + skey;
TBuffer b(TBuffer::kWrite,10000);
TTree::Class()->WriteBuffer(b,(TTree*)this);
total += b.Length();
Int_t file = Int_t(fZipBytes) + s;
Float_t cx = 1;
if (fZipBytes) cx = fTotBytes/fZipBytes;
Printf("******************************************************************************");
Printf("*Tree :%-10s: %-54s *",GetName(),GetTitle());
Printf("*Entries : %8d : Total = %15.10g bytes File Size = %10d *",Int_t(fEntries),total,file);
Printf("* : : Tree compression factor = %6.2f *",cx);
Printf("******************************************************************************");
Int_t nl = ((TTree*)this)->GetListOfLeaves()->GetEntries();
Int_t l;
TBranch *br;
TLeaf *leaf;
if (strstr(option,"toponly")) {
Int_t *count = new Int_t[nl];
Int_t keep =0;
for (l=0;l<nl;l++) {
leaf = (TLeaf *)((TTree*)this)->GetListOfLeaves()->At(l);
br = leaf->GetBranch();
if (strchr(br->GetName(),'.')) {
count[l] = -1;
count[keep] += (Int_t)br->GetZipBytes();
} else {
keep = l;
count[keep] = (Int_t)br->GetZipBytes();
}
}
for (l=0;l<nl;l++) {
if (count[l] < 0) continue;
leaf = (TLeaf *)((TTree*)this)->GetListOfLeaves()->At(l);
br = leaf->GetBranch();
printf("branch: %-20s %9d\n",br->GetName(),count[l]);
}
delete [] count;
} else {
TString reg = "*";
if (strlen(option) && strchr(option,'*')) reg = option;
TRegexp re(reg,kTRUE);
TIter next(((TTree*)this)->GetListOfBranches());
TBranch::ResetCount();
while ((br= (TBranch*)next())) {
TString s = br->GetName();
if (s.Index(re) == kNPOS) continue;
br->Print(option);
}
}
//print friends if option "all"
if (!fFriends || !strstr(option,"all")) return;
TIter nextf(fFriends);
TFriendElement *fr;
while ((fr = (TFriendElement*)nextf())) {
TTree * t = fr->GetTree();
if (t) t->Print(option);
}
}
//______________________________________________________________________________
Int_t TTree::Process(const char *filename,Option_t *option,Int_t nentries, Int_t firstentry)
{
//*-*-*-*-*-*-*-*-*Process this tree executing the code in filename*-*-*-*-*
//*-* ================================================
//
// The code in filename is loaded (interpreted or compiled , see below)
// filename must contain a valid class implementation derived from TSelector.
// where TSelector has the following member functions:
//
// void TSelector::Begin(). This function is called before looping on the
// events in the Tree. The user can create his histograms in this function.
//
// Bool_t TSelector::ProcessCut(Int_t entry). This function is called
// before processing entry. It is the user's responsability to read
// the corresponding entry in memory (may be just a partial read).
// The function returns kTRUE if the entry must be processed,
// kFALSE otherwise.
// void TSelector::ProcessFill(Int_t entry). This function is called for
// all selected events. User fills histograms in this function.
// void TSelector::Terminate(). This function is called at the end of
// the loop on all events.
// void TTreeProcess::Begin(). This function is called before looping on the
// events in the Tree. The user can create his histograms in this function.
//
// if filename is of the form file.C, the file will be interpreted.
// if filename is of the form file.C++, the file file.C will be compiled
// and dynamically loaded.
// if filename is of the form file.C+, the file file.C will be compiled
// and dynamically loaded. At next call, if file.C is older than file.o
// and file.so, the file.C is not compiled, only file.so is loaded.
//
// The function returns the number of processed entries. It returns -1
// in case of an error.
GetPlayer();
if (fPlayer) return fPlayer->Process(filename,option,nentries,firstentry);
else return -1;
}
//______________________________________________________________________________
Int_t TTree::Process(TSelector *selector,Option_t *option, Int_t nentries, Int_t firstentry)
{
//*-*-*-*-*-*-*-*-*Process this tree executing the code in selector*-*-*-*-*
//*-* ================================================
//
// The TSelector class has the following member functions:
//
// void TSelector::Begin(). This function is called before looping on the
// events in the Tree. The user can create his histograms in this function.
//
// Bool_t TSelector::ProcessCut(Int_t entry). This function is called
// before processing entry. It is the user's responsability to read
// the corresponding entry in memory (may be just a partial read).
// The function returns kTRUE if the entry must be processed,
// kFALSE otherwise.
// void TSelector::ProcessFill(Int_t entry). This function is called for
// all selected events. User fills histograms in this function.
// void TSelector::Terminate(). This function is called at the end of
// the loop on all events.
// void TTreeProcess::Begin(). This function is called before looping on the
// events in the Tree. The user can create his histograms in this function.
GetPlayer();
if (fPlayer) return fPlayer->Process(selector,option,nentries,firstentry);
else return -1;
}
//______________________________________________________________________________
Int_t TTree::Project(const char *hname, const char *varexp, const char *selection, Option_t *option,Int_t nentries, Int_t firstentry)
{
//*-*-*-*-*-*-*-*-*Make a projection of a Tree using selections*-*-*-*-*-*-*
//*-* =============================================
//
// Depending on the value of varexp (described in Draw) a 1-D,2-D,etc
// projection of the Tree will be filled in histogram hname.
// Note that the dimension of hname must match with the dimension of varexp.
//
Int_t nch = strlen(hname) + strlen(varexp);
char *var = new char[nch+5];
sprintf(var,"%s>>%s",varexp,hname);
nch = strlen(option) + 10;
char *opt = new char[nch];
if (option) sprintf(opt,"%sgoff",option);
else strcpy(opt,"goff");
Int_t nsel = Draw(var,selection,opt,nentries,firstentry);
delete [] var;
delete [] opt;
return nsel;
}
//______________________________________________________________________________
TSQLResult *TTree::Query(const char *varexp, const char *selection, Option_t *option, Int_t nentries, Int_t firstentry)
{
// Loop on Tree & return TSQLResult object containing entries following selection
GetPlayer();
if (fPlayer) return fPlayer->Query(varexp,selection,option,nentries,firstentry);
return 0;
}
//______________________________________________________________________________
void TTree::RemoveFriend(TTree *oldFriend)
{
//*-*-*-*-*-*-*-*Remove a friend from the list of friend *-*-*
//*-* =============================================
if (!fFriends) return;
TIter nextf(fFriends);
TFriendElement *fe;
while ((fe = (TFriendElement*)nextf())) {
TTree *friend_t = fe->GetTree();
if (friend_t == oldFriend) {
fFriends->Remove(fe);
delete fe;
}
}
}
//______________________________________________________________________________
void TTree::Reset(Option_t *option)
{
//*-*-*-*-*-*-*-*Reset buffers and entries count in all branches/leaves*-*-*
//*-* ======================================================
fNotify = 0;
fEntries = 0;
fTotBytes = 0;
fZipBytes = 0;
fSavedBytes = 0;
fTotalBuffers = 0;
fChainOffset = 0;
fReadEntry = -1;
Int_t nb = fBranches.GetEntriesFast();
for (Int_t i=0;i<nb;i++) {
TBranch *branch = (TBranch*)fBranches.UncheckedAt(i);
branch->Reset(option);
}
}
//______________________________________________________________________________
Int_t TTree::Scan(const char *varexp, const char *selection, Option_t *option, Int_t nentries, Int_t firstentry)
{
//*-*-*-*-*-*-*-*-*Loop on Tree & print entries following selection*-*-*-*-*-*
//*-* ===============================================
GetPlayer();
if (fPlayer) return fPlayer->Scan(varexp,selection,option,nentries,firstentry);
else return -1;
}
//_______________________________________________________________________
void TTree::SetBasketSize(const char *bname, Int_t buffsize)
{
//*-*-*-*-*-*-*-*-*Set branc(es) basket size*-*-*-*-*-*-*-*
//*-* =========================
//
// bname is the name of a branch.
// if bname="*", apply to all branches.
// if bname="xxx*", apply to all branches with name starting with xxx
// see TRegexp for wildcarding options
// buffsize = branc basket size
TBranch *branch;
TLeaf *leaf;
Int_t i;
Int_t nleaves = fLeaves.GetEntriesFast();
TRegexp re(bname,kTRUE);
Int_t nb = 0;
for (i=0;i<nleaves;i++) {
leaf = (TLeaf*)fLeaves.UncheckedAt(i);
branch = (TBranch*)leaf->GetBranch();
TString s = branch->GetName();
if (strcmp(bname,branch->GetName()) && s.Index(re) == kNPOS) continue;
nb++;
branch->SetBasketSize(buffsize);
}
if (!nb) {
Error("SetBasketSize", "unknown branch -> %s", bname);
}
}
//_______________________________________________________________________
void TTree::SetBranchAddress(const char *bname, void *add)
{
//*-*-*-*-*-*-*-*-*Set branch address*-*-*-*-*-*-*-*
//*-* ==================
//
// If object is a TTree, this function is only an interface to TBranch::SetAddress
// Function overloaded by TChain.
TBranch *branch = GetBranch(bname);
if (branch) branch->SetAddress(add);
else Error("SetBranchAddress", "unknown branch -> %s", bname);
}
//_______________________________________________________________________
void TTree::SetBranchStatus(const char *bname, Bool_t status)
{
//*-*-*-*-*-*-*-*-*Set branch status Process or DoNotProcess*-*-*-*-*-*-*-*
//*-* =========================================
//
// When reading a Tree, by default, all branches are read.
// One can speed up considerably the analysis phase by activating
// only the branches that hold variables involved in a query.
//
// bname is the name of a branch.
// if bname="*", apply to all branches.
// if bname="xxx*", apply to all branches with name starting with xxx
// see TRegexp for wildcarding options
// status = 1 branch will be processed
// = 0 branch will not be processed
// Example:
// Assume a tree T with sub-branches a,b,c,d,e,f,g,etc..
// when doing T.GetEntry(i) all branches are read for entry i.
// to read only the branches c and e, one can do
// T.SetBranchStatus("*",0); //disable all branches
// T.SetBranchStatus("c",1);
// T.setBranchStatus("e",1);
// T.GetEntry(i);
//
// An alternative to this function is to read directly and only
// the interesting branches. Example:
// TBranch *brc = T.GetBranch("c");
// TBranch *bre = T.GetBranch("e");
// brc->GetEntry(i);
// bre->GetEntry(i);
TBranch *branch, *bcount, *bson;
TLeaf *leaf, *leafcount;
Int_t i,j;
Int_t nleaves = fLeaves.GetEntriesFast();
TRegexp re(bname,kTRUE);
Int_t nb = 0;
// first pass, loop on all branches
// for leafcount branches activate/deactivate in function of status
for (i=0;i<nleaves;i++) {
leaf = (TLeaf*)fLeaves.UncheckedAt(i);
branch = (TBranch*)leaf->GetBranch();
TString s = branch->GetName();
if (strcmp(bname,branch->GetName()) && s.Index(re) == kNPOS) continue;
nb++;
if (status) branch->ResetBit(kDoNotProcess);
else branch->SetBit(kDoNotProcess);
leafcount = leaf->GetLeafCount();
if (leafcount) {
bcount = leafcount->GetBranch();
if (status) bcount->ResetBit(kDoNotProcess);
else bcount->SetBit(kDoNotProcess);
}
}
if (!nb) {
Error("SetBranchStatus", "unknown branch -> %s", bname);
return;
}
// second pass, loop again on all branches
// activate leafcount branches for active branches only
for (i = 0; i < nleaves; i++) {
leaf = (TLeaf*)fLeaves.UncheckedAt(i);
branch = (TBranch*)leaf->GetBranch();
if (!branch->TestBit(kDoNotProcess)) {
leafcount = leaf->GetLeafCount();
if (leafcount) {
bcount = leafcount->GetBranch();
bcount->ResetBit(kDoNotProcess);
}
} else {
//Int_t nbranches = branch->GetListOfBranches()->GetEntriesFast();
Int_t nbranches = branch->GetListOfBranches()->GetEntries();
for (j=0;j<nbranches;j++) {
bson = (TBranch*)branch->GetListOfBranches()->UncheckedAt(j);
if (!bson) continue;
if (!bson->TestBit(kDoNotProcess)) {
if (bson->GetNleaves() <= 0) continue;
branch->ResetBit(kDoNotProcess);
break;
}
}
}
}
}
//______________________________________________________________________________
void TTree::SetBranchStyle(Int_t style)
{
// static function setting the current branch style
// style = 0 old Branch
// style = 1 new Bronch
fgBranchStyle = style;
}
//______________________________________________________________________________
void TTree::SetDebug(Int_t level, Int_t min, Int_t max)
{
// Set the debug level and the debug range
// for entries in the debug range, the functions TBranchElement::Fill
// and TBranchElement::GetEntry will print the number of bytes filled
// or read for each branch.
fDebug = level;
fDebugMin = min;
fDebugMax = max;
}
//______________________________________________________________________________
void TTree::SetDirectory(TDirectory *dir)
{
// Remove reference to this tree from current directory and add
// reference to new directory dir. dir can be 0 in which case the tree
// does not belong to any directory.
if (fDirectory == dir) return;
if (fDirectory) fDirectory->GetList()->Remove(this);
fDirectory = dir;
if (fDirectory) fDirectory->GetList()->Add(this);
TFile *file = 0;
if (fDirectory) file = fDirectory->GetFile();
TBranch * b;
TIter next(GetListOfBranches());
while((b = (TBranch*)next())){
b->SetFile(file);
}
}
//_______________________________________________________________________
void TTree::SetEstimate(Int_t n)
{
//*-*-*-*-*-*-*-*-*Set number of entries to estimate variable limits*-*-*-*
//*-* ================================================
if (n<=0) n = 10000;
fEstimate = n;
GetPlayer();
if (fPlayer) fPlayer->SetEstimate(n);
}
//______________________________________________________________________________
void TTree::SetMaxTreeSize(Int_t maxsize)
{
// static function
// Set the maximum size of a Tree file.
// In TTree::fill, when the file has a size > fgMaxTreeSize,
// the function closes the current file and starts writing into
// a new file with a name of the style "file_1.root" if the original
// requested file name was "file.root"
fgMaxTreeSize = maxsize;
}
//______________________________________________________________________________
void TTree::SetName(const char *name)
{
// Change the name of this Tree
//
if (gPad) gPad->Modified();
// Trees are named objects in a THashList.
// We must update the hashlist if we change the name
if (fDirectory) fDirectory->GetList()->Remove(this);
fName = name;
if (fDirectory) fDirectory->GetList()->Add(this);
}
//______________________________________________________________________________
void TTree::SetObject(const char *name, const char *title)
{
// Change the name and title of this Tree
//
if (gPad) gPad->Modified();
// Trees are named objects in a THashList.
// We must update the hashlist if we change the name
if (fDirectory) fDirectory->GetList()->Remove(this);
fName = name;
fTitle = title;
if (fDirectory) fDirectory->GetList()->Add(this);
}
//______________________________________________________________________________
void TTree::SetWeight(Double_t w, Option_t *)
{
// Set tree weight.
// The weight is used by TTree::Draw to automatically weight each
// selected entry in the resulting histogram.
// For example the equivalent of
// T.Draw("x","w")
// is
// T.SetWeight(w);
// T.Draw("x");
//
// This function is redefined by TChain::SetWeight. In case of a TChain,
// an option "global" may be specified to set the same weight
// for all Trees in the TChain instead of the default behaviour
// using the weights of each Tree in the chain. (see TChain::SetWeight)
fWeight = w;
}
//_______________________________________________________________________
void TTree::Show(Int_t entry)
{
//*-*-*-*-*-*Print values of all active leaves for entry*-*-*-*-*-*-*-*
//*-* ===========================================
// if entry==-1, print current entry (default)
if (entry != -1) GetEntry(entry);
printf("======> EVENT:%dn",fReadEntry);
TObjArray *leaves = GetListOfLeaves();
Int_t nleaves = leaves->GetEntriesFast();
for (Int_t i=0;i<nleaves;i++) {
TLeaf *leaf = (TLeaf*)leaves->UncheckedAt(i);
TBranch *branch = leaf->GetBranch();
if (branch->TestBit(kDoNotProcess)) continue;
Int_t len = leaf->GetLen();
if (len <= 0) continue;
len = TMath::Min(len,10);
if (leaf->IsA() == TLeafElement::Class()) {leaf->PrintValue(len); continue;}
if (branch->GetListOfBranches()->GetEntriesFast() > 0) continue;
if (leaf->IsA() == TLeafF::Class()) len = TMath::Min(len,5);
if (leaf->IsA() == TLeafD::Class()) len = TMath::Min(len,5);
if (leaf->IsA() == TLeafC::Class()) len = 1;
printf(" %-15s = ",leaf->GetName());
for (Int_t l=0;l<len;l++) {
leaf->PrintValue(l);
if (l == len-1) printf("n");
else printf(", ");
}
}
}
//_______________________________________________________________________
void TTree::StartViewer()
{
//*-*-*-*-*-*-*-*-*Start the TTreeViewer on this TTree*-*-*-*-*-*-*-*-*-*
//*-* ===================================
//
// ww is the width of the canvas in pixels
// wh is the height of the canvas in pixels
GetPlayer();
if (fPlayer) fPlayer->StartViewer(600,400);
}
//_______________________________________________________________________
void TTree::Streamer(TBuffer &b)
{
//*-*-*-*-*-*-*-*-*Stream a class object*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
//*-* =========================================
if (b.IsReading()) {
UInt_t R__s, R__c;
gTree = this;
Version_t R__v = b.ReadVersion(&R__s, &R__c);
if (R__v > 4) {
fDirectory = gDirectory;
TTree::Class()->ReadBuffer(b, this, R__v, R__s, R__c);
if (fEstimate <= 10000) fEstimate = 1000000;
fSavedBytes = fTotBytes;
gDirectory->Append(this);
return;
}
//====process old versions before automatic schema evolution
TNamed::Streamer(b);
TAttLine::Streamer(b);
TAttFill::Streamer(b);
TAttMarker::Streamer(b);
b >> fScanField;
b >> fMaxEntryLoop;
b >> fMaxVirtualSize;
b >> fEntries;
b >> fTotBytes;
b >> fZipBytes;
b >> fAutoSave;
b >> fEstimate;
if (fEstimate <= 10000) fEstimate = 1000000;
fBranches.Streamer(b);
fLeaves.Streamer(b);
fSavedBytes = fTotBytes;
fDirectory = gDirectory;
gDirectory->Append(this);
if (R__v > 1) fIndexValues.Streamer(b);
if (R__v > 2) fIndex.Streamer(b);
if (R__v > 3) {
TList OldInfoList;
OldInfoList.Streamer(b);
OldInfoList.Delete();
}
b.CheckByteCount(R__s, R__c, TTree::IsA());
//====end of old versions
} else {
TTree::Class()->WriteBuffer(b,this);
}
}
//______________________________________________________________________________
Int_t TTree::UnbinnedFit(const char *funcname ,const char *varexp, const char *selection,Option_t *option ,Int_t nentries, Int_t firstentry)
{
//*-*-*-*-*-*Unbinned fit of one or more variable(s) from a Tree*-*-*-*-*-*
//*-* ===================================================
//
// funcname is a TF1 function.
//
// See TTree::Draw for explanations of the other parameters.
//
// Fit the variable varexp using the function funcname using the
// selection cuts given by selection.
//
// The list of fit options is given in parameter option.
// option = "Q" Quiet mode (minimum printing)
// = "V" Verbose mode (default is between Q and V)
// = "E" Perform better Errors estimation using Minos technique
// = "M" More. Improve fit results
//
// You can specify boundary limits for some or all parameters via
// func->SetParLimits(p_number, parmin, parmax);
// if parmin>=parmax, the parameter is fixed
// Note that you are not forced to fix the limits for all parameters.
// For example, if you fit a function with 6 parameters, you can do:
// func->SetParameters(0,3.1,1.e-6,0.1,-8,100);
// func->SetParLimits(4,-10,-4);
// func->SetParLimits(5, 1,1);
// With this setup, parameters 0->3 can vary freely
// Parameter 4 has boundaries [-10,-4] with initial value -8
// Parameter 5 is fixed to 100.
//
// For the fit to be meaningful, the function must be self-normalized.
//
// i.e. It must have the same integral regardless of the parameter
// settings. Otherwise the fit will effectively just maximize the
// area.
//
// In practice it is convenient to have a normalization variable
// which is fixed for the fit. e.g.
//
// TF1* f1 = new TF1("f1", "gaus(0)/sqrt(2*3.14159)/[2]", 0, 5);
// f1->SetParameters(1, 3.1, 0.01);
// f1->SetParLimits(0, 1, 1); // fix the normalization parameter to 1
// data->UnbinnedFit("f1", "jpsimass", "jpsipt>3.0");
// //
//
// 1, 2 and 3 Dimensional fits are supported.
// See also TTree::Fit
GetPlayer();
if (fPlayer) return fPlayer->UnbinnedFit(funcname,varexp,selection,option,nentries,firstentry);
else return -1;
}
//______________________________________________________________________________
void TTree::UseCurrentStyle()
{
//*-*-*-*-*-*Replace current attributes by current style*-*-*-*-*
//*-* ===========================================
SetFillColor(gStyle->GetHistFillColor());
SetFillStyle(gStyle->GetHistFillStyle());
SetLineColor(gStyle->GetHistLineColor());
SetLineStyle(gStyle->GetHistLineStyle());
SetLineWidth(gStyle->GetHistLineWidth());
SetMarkerColor(gStyle->GetMarkerColor());
SetMarkerStyle(gStyle->GetMarkerStyle());
SetMarkerSize(gStyle->GetMarkerSize());
}
//////////////////////////////////////////////////////////////////////////
// //
// TTreeFriendLeafIter //
// //
// Iterator on all the leaves in a TTree and its friend //
// //
//////////////////////////////////////////////////////////////////////////
ClassImp(TTreeFriendLeafIter)
//______________________________________________________________________________
TTreeFriendLeafIter::TTreeFriendLeafIter(const TTree * tree, Bool_t dir)
: fTree((TTree*)tree),fLeafIter(0),fTreeIter(0),fDirection(dir)
{
// Create a new iterator. By default the iteration direction
// is kIterForward. To go backward use kIterBackward.
}
//______________________________________________________________________________
TTreeFriendLeafIter::TTreeFriendLeafIter(const TTreeFriendLeafIter&iter) : TIterator(iter)
{
// Copy constructor
fTree = iter.fTree;
fDirection = iter.fDirection;
}
//______________________________________________________________________________
TIterator &TTreeFriendLeafIter::operator=(const TIterator &rhs)
{
// Overridden assignment operator.
if (this != &rhs && rhs.IsA() == TTreeFriendLeafIter::Class()) {
const TTreeFriendLeafIter &rhs1 = (const TTreeFriendLeafIter &)rhs;
fDirection = rhs1.fDirection;
}
return *this;
}
//______________________________________________________________________________
TTreeFriendLeafIter &TTreeFriendLeafIter::operator=(const TTreeFriendLeafIter &rhs)
{
// Overridden assignment operator.
if (this != &rhs ) {
fDirection = rhs.fDirection;
}
return *this;
}
//______________________________________________________________________________
TObject *TTreeFriendLeafIter::Next()
{
if (!fTree) return 0;
TObject * next;
TTree * nextTree;
if (!fLeafIter) {
TObjArray *list = fTree->GetListOfLeaves();
if (!list) return 0; // Can happen with an empty chain.
fLeafIter = list->MakeIterator(fDirection);
}
next = fLeafIter->Next();
if (!next) {
if (!fTreeIter) {
TCollection * list = fTree->GetListOfFriends();
if (!list) return next;
fTreeIter = list->MakeIterator(fDirection);
}
TFriendElement * nextFriend = (TFriendElement*) fTreeIter->Next();
///nextTree = (TTree*)fTreeIter->Next();
if (nextFriend) {
nextTree = (TTree*)nextFriend->GetTree();
if (!nextTree) return Next();
SafeDelete(fLeafIter);
fLeafIter = nextTree->GetListOfLeaves()->MakeIterator(fDirection);
next = fLeafIter->Next();
}
}
return next;
}
//______________________________________________________________________________
Option_t *TTreeFriendLeafIter::GetOption() const
{
// Returns the object option stored in the list.
if (fLeafIter) return fLeafIter->GetOption();
return "";
}
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