A List of entry numbers in a TTree or TChain.

There are two types of entry lists:

1.

for a TTree (fBlocks data member is non-zero) Entry numbers are stored in TEntryListBlocks, which, in their turn, are stored in the TObjArray fBlocks. The range of the entry numbers is cut into intervals of kBlockSize entries (currently 64000), so that the first block contains information which entries out of the first 64000 pass the selection, the second block - which entries out of the 64000-127999 interval pass the selection, etc. Some blocks, obviously, might be empty. The internal representation of entry numbers in the blocks is described in the TEntryListBlock class description, and this representation might be changed by calling OptimizeStorage() function (when the list is filled via the Enter() function, this is done automatically, except for the last block). Individual entry lists can be merged (functions Merge() and Add()) to make an entry list for a TChain of corresponding TTrees.

{
//=========Macro generated from canvas: c/c
//=========  (Tue Jan 23 16:58:56 2007) by ROOT version5.15/01
   TCanvas *c = new TCanvas("c", "c",213,172,460,253);
   c->Range(0,0,1,1);
   c->SetBorderSize(2);
   c->SetFrameFillColor(0);
   TPaveText *pt = new TPaveText(0.00518135,0.810811,0.507772,0.989189,"br");
   pt->SetFillColor(19);
   pt->SetTextColor(4);
   TText *text = pt->AddText("TEntryList for a TTree");
   pt->Draw();
   pt = new TPaveText(0.0387597,0.483696,0.307494,0.657609,"br");
   pt->SetFillColor(19);
   text = pt->AddText("TEntryList");
   pt->Draw();
   pt = new TPaveText(0.0363636,0.107527,0.306494,0.489247,"br");
   pt->SetFillColor(19);
   pt->SetTextFont(42);
   text = pt->AddText("fBlocks");
   text = pt->AddText("fLists = 0");
   pt->Draw();
   pt = new TPaveText(0.338501,0.23913,0.627907,0.375,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   text = pt->AddText("Info on entries 0-63999");
   pt->Draw();
   pt = new TPaveText(0.643411,0.23913,0.989664,0.375,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   text = pt->AddText("entries 64000-127999");
   pt->Draw();
   pt = new TPaveText(0.423773,0.423913,0.870801,0.576087,"br");
   pt->SetFillColor(19);
   text = pt->AddText("TObjArray of TEntryListBlock objects");
   pt->Draw();
   TArrow *arrow = new TArrow(0.277202,0.356757,0.418605,0.505435,0.05,">");
   arrow->SetFillColor(1);
   arrow->SetFillStyle(1001);
   arrow->Draw();
   return c;
}

2.

for a TChain (fLists data member is non-zero) It contains a TList of sub-lists (TEntryList objects, corresponding to each TTree) Trees and lists are matched by the TTree name and its file name (full path). All sub-lists are returned by the GetLists() function and individual lists are returned by GetEntryList() function. Such lists are no different from the lists for TTrees, described above.

{
//=========Macro generated from canvas: c/c
//=========  (Mon Jan 22 19:00:21 2007) by ROOT version5.15/01
   TCanvas *c = new TCanvas("c", "c",172,104,447,249);
   c->Range(0,0,1,1);
   c->SetBorderSize(2);
   c->SetFrameFillColor(0);
   TPaveText *pt = new TPaveText(0.0026738,0.790055,0.417112,0.994475,"br");
   pt->SetFillColor(19);
   pt->SetTextColor(4);
   TText *text = pt->AddText("TEntryList for a TChain");
   pt->Draw();
   pt = new TPaveText(0.00802139,0.541436,0.294118,0.701657,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   pt->SetTextFont(42);
   text = pt->AddText("TEntryList");
   pt->Draw();
   pt = new TPaveText(0.0106952,0.237569,0.294118,0.546961,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   pt->SetTextFont(42);
   text = pt->AddText("fBlocks = 0");
   text = pt->AddText("fLists");
   pt->Draw();
   pt = new TPaveText(0.483957,0.607735,0.68984,0.773481,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   pt->SetTextFont(42);
   text = pt->AddText("TChain");
   pt->Draw();
   pt = new TPaveText(0.347594,0.475138,0.494652,0.596685,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   pt->SetTextFont(42);
   text = pt->AddText("TTree_1");
   pt->Draw();
   pt = new TPaveText(0.508021,0.475138,0.660428,0.59116,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   pt->SetTextFont(42);
   text = pt->AddText("TTree_2");
   pt->Draw();
   pt = new TPaveText(0.673797,0.469613,0.826203,0.59116,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   pt->SetTextFont(42);
   text = pt->AddText("TTree_3");
   pt->Draw();
   pt = new TPaveText(0.251337,0.0331492,0.483957,0.165746,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   text = pt->AddText("TEntryList for TTree_1");
   pt->Draw();
   pt = new TPaveText(0.491979,0.038674,0.729947,0.171271,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   text = pt->AddText("TEntryList for TTree_2");
   pt->Draw();
   pt = new TPaveText(0.737968,0.038674,0.97861,0.171271,"br");
   pt->SetBorderSize(1);
   pt->SetFillColor(19);
   text = pt->AddText("TEntryList for TTree_3");
   pt->Draw();
   pt = new TPaveText(0.410667,0.21978,0.816,0.395604,"br");
   pt->SetFillColor(19);
   text = pt->AddText("TList of TEntryList* objects");
   pt->Draw();
   TArrow *arrow = new TArrow(0.224,0.296703,0.4,0.296703,0.05,">");
   arrow->SetFillColor(1);
   arrow->SetFillStyle(1001);
   arrow->Draw();
   return c;
}

Operations on entry lists

Add() - if the lists are for the same tree, adds all the entries of the second list to the first list. If the lists are for different trees, creates a TEntryList with 2 sublists for each TTree. If the lists are for TChains, merges the ones for the same trees and adds new sublists for the TTrees that were not included in the first TEntryList
Subtract() - if the lists are for the same TTree, removes the entries of the second list from the first list. If the lists are for TChains, loops over all sub-lists
GetEntry(n) - returns the n-th entry number
Next() - returns next entry number. Note, that this function is much faster than GetEntry, and it's called when GetEntry() is called for 2 or more indices in a row.

TTree::Draw() and TChain::Draw()

Use option entrylist to write the results of TTree::Draw and TChain::Draw into an entry list. Example:

tree->Draw(">>elist", "x<0 && y>0", "entrylist");

TEntryList *elist = (TEntryList*)gDirectory->Get("elist");

## Example of Loop on TEntryList with a TChain

void loopChain() {
   TFile *fe = TFile::Open("myelist.root");
   TEntryList *myelist = (TEntryList*)fe->Get("myelist");
   TChain *ch = new TChain("ntuple");
   ch->Add("hsimple.root");
   ch->Add("hsimple2.root");
   Long64_t listEntries = myelist->GetN();
   Long64_t chainEntries = ch->GetEntries();
   Int_t treenum = 0;
   ch->SetEntryList(myelist);
   for (entry=start;entry < end;entry++) {
      entryNumber = treechain->GetEntryNumber(entry);
      if (entryNumber < 0) break;
      localEntry = fTree->LoadTree(entryNumber);
      if (localEntry < 0) break;
      ....
      then either call branch->GetEntry(localEntry);
      or  entryNumber->GetEntry(entryNumber);
      In the later case the LoadTree is then somewhat redudant.
      ...
   }
}

When using the TEntryList interface directly, you can get the 'tree number' and entry in the current tree (i.e. value similar to the return value of LoadTree) from calling TEntryList::GetEntryAndTree:

Long64_t treeEntry = myelist->GetEntryAndTree(el,treenum);

to obtain the entry number within the chain you need to add to it the value of treeEntry+ch->GetTreeOffset()[treenum] such that the loop in the previous example can also be written as:

for (Long64_t el = 0; el < listEntries; el++) {
   Long64_t treeEntry = myelist->GetEntryAndTree(el,treenum);
   Long64_t chainEntry = treeEntry+ch->GetTreeOffset()[treenum];
   printf("el=%lld, treeEntry=%lld, chainEntry=%lld, treenum=%d\n", el, treeEntry, chainEntry, treenum);
   ch->LoadTree(chainEntry); // this also returns treeEntry
   needed_branch->GetEntry(treeEntry);
}

TSelectors

To fill an TEntryList from a TSelector correctly, one must add the TEntryList object to the output list of the selector (TSelector::fOutput). This is the only way to make the sub-lists of the TEntryList switch when the current tree of the TChain is changed.

Using a TEntryList as input (TTree::SetEntryList() and TChain::SetEntryList())

while the TTree::SetEntryList() function is only setting the TTree::fEntryList data member, the same function in TChain also finds correspondance between the TTrees of this TChain and the sub-lists of this TEntryList.

TEntryList and the current directory

TEntryList objects are automatically added to the current directory (like TTrees). However, in case of a TEntryList for a chain, only the top-level entry list is added, not the sub-lists for specific trees. Placing entry lists in the current directory allows calling them as a part of a TTreeFormula expression, so if the user wants to extract a sublist from a TChain entry list via the GetEntryList() or some other function, they have to add it to the current directory to be able to use it in TTreeFormula expressions.

TEntryList and TEventList

TTree::SetEventList() and TChain::SetEventList() transform a TEventList into a TEntryList See comments to those functions for more details

Definition at line 27 of file TEntryList.h.

Public Types
enum	{ kBlockSize = 64000 }

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

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

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

Public Member Functions
	TEntryList ()

	TEntryList (const char name, const char title)
	c-tor with name and title More...

	TEntryList (const char name, const char title, const TTree *tree)
	constructor with name and title, which also sets the tree More...

	TEntryList (const char name, const char title, const char treename, const char filename)
	c-tor with name and title, which also sets the treename and the filename More...

	TEntryList (const TTree *tree)
	c-tor, which sets the tree More...

	TEntryList (const TEntryList &elist)
	copy c-tor More...

virtual	~TEntryList ()
	Destructor. More...

virtual void	Add (const TEntryList *elist)
	Add 2 entry lists. More...

virtual Int_t	Contains (Long64_t entry, TTree *tree=0)

virtual void	DirectoryAutoAdd (TDirectory *)
	Called by TKey and others to automatically add us to a directory when we are read from a file. More...

virtual Bool_t	Enter (Long64_t entry, TTree *tree=0)
	Add entry entry to the list. More...

virtual TEntryList *	GetCurrentList () const

virtual TEntryList *	GetEntryList (const char treename, const char filename, Option_t *opt="")
	Return the entry list, correspoding to treename and filename By default, the filename is first tried as is, and then, if the corresponding list is not found, the filename is expanded to the absolute path, and compared again. More...

virtual Long64_t	GetEntry (Int_t index)
	Return the number of the entry #index of this TEntryList in the TTree or TChain See also Next(). More...

virtual Long64_t	GetEntryAndTree (Int_t index, Int_t &treenum)
	Return the index of "index"-th non-zero entry in the TTree or TChain and the # of the corresponding tree in the chain. More...

virtual Long64_t	GetEntriesToProcess () const

virtual TList *	GetLists () const

virtual TDirectory *	GetDirectory () const

virtual Long64_t	GetN () const

virtual const char *	GetTreeName () const

virtual const char *	GetFileName () const

virtual Int_t	GetTreeNumber () const

virtual Bool_t	GetReapplyCut () const

virtual Int_t	Merge (TCollection *list)
	Merge this list with the lists from the collection. More...

virtual Long64_t	Next ()
	Return the next non-zero entry index (next after fLastIndexQueried) this function is faster than GetEntry() More...

virtual void	OptimizeStorage ()
	Checks if the array representation is more economical and if so, switches to it. More...

virtual Int_t	RelocatePaths (const char newloc, const char oldloc=0)
	Relocate the file paths. More...

virtual Bool_t	Remove (Long64_t entry, TTree *tree=0)
	Remove entry entry from the list. More...

virtual void	Reset ()
	Reset this list. More...

virtual Int_t	ScanPaths (TList *roots, Bool_t notify=kTRUE)
	Scan the paths to find the common roots. More...

virtual void	Print (const Option_t *option="") const
	Print this list. More...

virtual void	SetDirectory (TDirectory *dir)
	Add reference to directory dir. dir can be 0. More...

virtual void	SetEntriesToProcess (Long64_t nen)

virtual void	SetShift (Bool_t shift)

virtual void	SetTree (const TTree *tree)
	If a list for a tree with such name and filename exists, sets it as the current sublist If not, creates this list and sets it as the current sublist The name of the file, where the tree is, is taken as `tree->GetTree()->GetCurrentFile()->GetName()`, and then expanded either to the absolute path, or to full url. More...

virtual void	SetTree (const char treename, const char filename)
	If a list for a tree with such name and filename exists, sets it as the current sublist If not, creates this list and sets it as the current sublist. More...

virtual void	SetTreeName (const char *treename)

virtual void	SetFileName (const char *filename)

virtual void	SetTreeNumber (Int_t index)

virtual void	SetReapplyCut (Bool_t apply=kFALSE)

virtual void	Subtract (const TEntryList *elist)
	Remove all the entries of this entry list, that are contained in elist. More...

	ClassDef (TEntryList, 2)

Public Member Functions inherited from TNamed
	TNamed ()

	TNamed (const char name, const char title)

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

	TNamed (const TNamed &named)

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

virtual	~TNamed ()

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

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

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

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

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

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

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

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

virtual Bool_t	IsSortable () const

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

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

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

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

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

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

Public Member Functions inherited from TObject
	TObject ()

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

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

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

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

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

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

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

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

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

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

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

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

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g. More...

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

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

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

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

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

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

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

virtual Option_t *	GetOption () const

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

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

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

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

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

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

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

Bool_t	IsOnHeap () const

Bool_t	IsZombie () const

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

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

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

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

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

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

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

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

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

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

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

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

void *	operator new (size_t sz)

void *	operator new[] (size_t sz)

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

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

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

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

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

void	SetBit (UInt_t f)

void	ResetBit (UInt_t f)

Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

void	InvertBit (UInt_t f)

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

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

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

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

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

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

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More...

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

Static Public Member Functions
static Int_t	Relocate (const char fn, const char newroot, const char oldroot=0, const char enlnm=0)
	Relocate entry list 'enlnm' in file 'fn' replacing 'oldroot' with 'newroot' in filenames. More...

static Int_t	Scan (const char fn, TList roots)
	Scan TEntryList in 'fn' to find the common parts of paths. More...

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

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

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

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

Protected Member Functions
void	GetFileName (const char filename, TString &fn, Bool_t =0)
	To be able to re-localize the entry-list we identify the file by just the name and the anchor, i.e. More...

Protected Member Functions inherited from TObject
void	MakeZombie ()

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

Protected Attributes
TList *	fLists

TEntryList *	fCurrent

Int_t	fNBlocks
	currently filled entry list More...

TObjArray *	fBlocks

Long64_t	fN

Long64_t	fEntriesToProcess

TString	fTreeName

TString	fFileName

ULong_t	fStringHash

Int_t	fTreeNumber
	Hash value of a string of treename and filename. More...

Long64_t	fLastIndexQueried
	the index of the tree in the chain (used when the entry More...

Long64_t	fLastIndexReturned
	used to optimize GetEntry() function from a loop More...

Bool_t	fShift
	used to optimize GetEntry() function from a loop More...

TDirectory *	fDirectory
	true when some sub-lists don't correspond to trees More...

Bool_t	fReapply
	Pointer to directory holding this tree. More...

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

Private Member Functions
TEntryList &	operator= (const TEntryList &)

Friends
TEntryList	operator\|\| (TEntryList &elist1, TEntryList &elist2)

#include <TEntryList.h>

Inheritance diagram for TEntryList:

Collaboration diagram for TEntryList:

Member Enumeration Documentation

anonymous enum

Enumerator
kBlockSize

Definition at line 56 of file TEntryList.h.

Constructor & Destructor Documentation

TEntryList::TEntryList ( )

Referenced by Add(), SetTree(), and TEntryList().

TEntryList::TEntryList	(	const char *	name,
		const char *	title
	)

c-tor with name and title

Definition at line 180 of file TEntryList.cxx.

TEntryList::TEntryList	(	const char *	name,
		const char *	title,
		const TTree *	tree
	)

constructor with name and title, which also sets the tree

Definition at line 206 of file TEntryList.cxx.

TEntryList::TEntryList	(	const char *	name,
		const char *	title,
		const char *	treename,
		const char *	filename
	)

c-tor with name and title, which also sets the treename and the filename

Definition at line 228 of file TEntryList.cxx.

TEntryList::TEntryList ( const TTree * tree )

c-tor, which sets the tree

Definition at line 250 of file TEntryList.cxx.

TEntryList::TEntryList ( const TEntryList & elist )

copy c-tor

Definition at line 273 of file TEntryList.cxx.

TEntryList::~TEntryList ( )

virtual

Destructor.

Definition at line 321 of file TEntryList.cxx.

Member Function Documentation

void TEntryList::Add ( const TEntryList * elist )

virtual

Add 2 entry lists.

Reimplemented in TEntryListArray, TEntryListFromFile, and TEntryListArray.

Definition at line 343 of file TEntryList.cxx.

Referenced by TEntryListArray::Add(), Add(), TEntryListArray::AddEntriesAndSubLists(), Merge(), and operator||().

TEntryList::ClassDef	(	TEntryList	,
		2
	)

Int_t TEntryList::Contains	(	Long64_t	entry,
		TTree *	tree = `0`
	)

virtual

When tree = 0, returns from the current list
When tree != 0, finds the list, corresponding to this tree
When tree is a chain, the entry is assumed to be global index and the local entry is recomputed from the treeoffset information of the chain

Reimplemented in TEntryListArray, TEntryListFromFile, and TEntryListArray.

Definition at line 517 of file TEntryList.cxx.

Referenced by TEntryListArray::Contains(), Contains(), TTreeFormula::EvalInstance(), and TSelectorDraw::ProcessFillMultiple().

void TEntryList::DirectoryAutoAdd ( TDirectory * dir )

virtual

Called by TKey and others to automatically add us to a directory when we are read from a file.

Definition at line 546 of file TEntryList.cxx.

Bool_t TEntryList::Enter	(	Long64_t	entry,
		TTree *	tree = `0`
	)

virtual

Add entry entry to the list.

When tree = 0, adds to the current list
When tree != 0, finds the list, corresponding to this tree
When tree is a chain, the entry is assumed to be global index and the local entry is recomputed from the treeoffset information of the chain

Reimplemented in TEntryListArray, TEntryListArray, and TEntryListFromFile.

Definition at line 558 of file TEntryList.cxx.

Referenced by TEntryListArray::Enter(), Enter(), TParallelCoord::GetEntryList(), TTreeTableInterface::InitEntries(), and TSelectorDraw::TakeAction().

virtual TEntryList* TEntryList::GetCurrentList ( ) const

inlinevirtual

Reimplemented in TEntryListFromFile.

Definition at line 70 of file TEntryList.h.

virtual TDirectory* TEntryList::GetDirectory ( ) const

inlinevirtual

Definition at line 76 of file TEntryList.h.

Referenced by TEntryListArray::Reset(), Reset(), SetTree(), and TTree::~TTree().

virtual Long64_t TEntryList::GetEntriesToProcess ( ) const

inlinevirtual

Definition at line 74 of file TEntryList.h.

Referenced by TEventIterObj::GetNextEvent(), TEventIterTree::GetNextEvent(), TEventIterObj::GetNextPacket(), and TEventIterTree::GetNextPacket().

Long64_t TEntryList::GetEntry ( Int_t index )

virtual

Return the number of the entry #index of this TEntryList in the TTree or TChain See also Next().

Reimplemented in TEntryListFromFile.

Definition at line 653 of file TEntryList.cxx.

Referenced by TAlienCollection::ExportXML(), TEntryListFromFile::GetEntry(), GetEntry(), GetEntryAndTree(), TParallelCoord::GetEntryList(), TEventIter::GetEntryNumber(), TTree::GetEntryNumber(), TEventIterTree::GetNextEvent(), and TEntryListArray::Print().

Long64_t TEntryList::GetEntryAndTree	(	Int_t	index,
		Int_t &	treenum
	)

virtual

Return the index of "index"-th non-zero entry in the TTree or TChain and the # of the corresponding tree in the chain.

Reimplemented in TEntryListFromFile.

Definition at line 729 of file TEntryList.cxx.

Referenced by TChain::GetEntryNumber().

TEntryList * TEntryList::GetEntryList	(	const char *	treename,
		const char *	filename,
		Option_t *	opt = `""`
	)

virtual

Return the entry list, correspoding to treename and filename By default, the filename is first tried as is, and then, if the corresponding list is not found, the filename is expanded to the absolute path, and compared again.

To avoid it, use option "ne"

Reimplemented in TEntryListFromFile.

Definition at line 777 of file TEntryList.cxx.

Referenced by TChain::SetEntryList(), and TDSet::SplitEntryList().

void TEntryList::GetFileName	(	const char *	filename,
		TString &	fn,
		Bool_t *	local = `0`
	)

protected

To be able to re-localize the entry-list we identify the file by just the name and the anchor, i.e.

we drop protocol, host, options, ... The result in the form 'file::anchor' (or 'file', if no anchor is present) is saved in 'fn'. The function optionally (is 'local' is defined) checks file locality (i.e. protocol 'file://') returning the result in '*local' .

Definition at line 758 of file TEntryList.cxx.

Referenced by TEntryListArray::Add(), TEntryListArray::AddEntriesAndSubLists(), GetEntryList(), Print(), and TEntryListArray::Subtract().

virtual const char* TEntryList::GetFileName ( ) const

inlinevirtual

Reimplemented in TEntryListFromFile.

Definition at line 79 of file TEntryList.h.

Referenced by GetEntryList(), and SetTree().

virtual TList* TEntryList::GetLists ( ) const

inlinevirtual

Definition at line 75 of file TEntryList.h.

Referenced by TEntryListArray::Add(), TEntryListArray::AddEntriesAndSubLists(), TProof::AssertDataSet(), TChain::SetEntryList(), TEntryListArray::Subtract(), and Subtract().

virtual Long64_t TEntryList::GetN ( ) const

inlinevirtual

virtual Bool_t TEntryList::GetReapplyCut ( ) const

inlinevirtual

Definition at line 81 of file TEntryList.h.

Referenced by TSelectorDraw::Begin().

virtual const char* TEntryList::GetTreeName ( ) const

inlinevirtual

Reimplemented in TEntryListFromFile.

Definition at line 78 of file TEntryList.h.

Referenced by TEntryListArray::Add(), TEntryListArray::AddEntriesAndSubLists(), GetEntryList(), Print(), and TEntryListArray::Subtract().

virtual Int_t TEntryList::GetTreeNumber ( ) const

inlinevirtual

Reimplemented in TEntryListFromFile.

Definition at line 80 of file TEntryList.h.

Referenced by GetEntry(), Next(), and TChain::SetEntryList().

Int_t TEntryList::Merge ( TCollection * list )

virtual

Merge this list with the lists from the collection.

Reimplemented in TEntryListFromFile.

Definition at line 867 of file TEntryList.cxx.

Long64_t TEntryList::Next ( )

virtual

Return the next non-zero entry index (next after fLastIndexQueried) this function is faster than GetEntry()

Reimplemented in TEntryListFromFile.

Definition at line 886 of file TEntryList.cxx.

Referenced by GetEntry(), TEntryListFromFile::Next(), and Next().

TEntryList& TEntryList::operator= ( const TEntryList & )

private

void TEntryList::OptimizeStorage ( )

virtual

Checks if the array representation is more economical and if so, switches to it.

Reimplemented in TEntryListFromFile.

Definition at line 973 of file TEntryList.cxx.

void TEntryList::Print ( const Option_t * option = "" ) const

virtual

Print this list.

option = "" - default - print the name of the tree and file
option = "all" - print all the entry numbers

Reimplemented in TEntryListArray, TEntryListFromFile, and TEntryListArray.

Definition at line 989 of file TEntryList.cxx.

Referenced by operator||(), TEntryListArray::Print(), TEntryListFromFile::Print(), and Print().

Int_t TEntryList::Relocate	(	const char *	fn,
		const char *	newroot,
		const char *	oldroot = `0`,
		const char *	enlnm = `0`
	)

static

Relocate entry list 'enlnm' in file 'fn' replacing 'oldroot' with 'newroot' in filenames.

If 'enlnm' is null or '*' all entry lists in the file are relocated. Relocation is mandatory to use the entry-list with the same dataset at a different location (i.e. on a different cluster, machine or disks). This function can be called as many times as need to reach the desired result. The existing 'locations' can be checked qith TEntryList::Scan .

Definition at line 1353 of file TEntryList.cxx.

Int_t TEntryList::RelocatePaths	(	const char *	newroot,
		const char *	oldroot = `0`
	)

virtual

Relocate the file paths.

If oldroot is defined, replace oldroot with newroot in all file names, i.e. oldroot/re/st/of/the/path will become newroot/re/st/of/the/path. Ifoldrootis null, the new path will be justnewroot/path`. Relocation is mandatory to use the entry-list with the same dataset at a different location (i.e. on a different cluster, machine or disks).

Definition at line 1294 of file TEntryList.cxx.

Referenced by Relocate(), and RelocatePaths().

Bool_t TEntryList::Remove	(	Long64_t	entry,
		TTree *	tree = `0`
	)

virtual

Remove entry entry from the list.

When tree = 0, removes from the current list
When tree != 0, finds the list, corresponding to this tree
When tree is a chain, the entry is assumed to be global index and the local entry is recomputed from the treeoffset information of the chain

Reimplemented in TEntryListArray, TEntryListFromFile, and TEntryListArray.

Definition at line 613 of file TEntryList.cxx.

Referenced by TEntryListArray::Remove(), Remove(), and Subtract().

void TEntryList::Reset ( void )

virtual

Reset this list.

Reimplemented in TEntryListArray, and TEntryListArray.

Definition at line 1026 of file TEntryList.cxx.

Referenced by TSelectorDraw::Begin(), and TEntryListArray::Reset().

Int_t TEntryList::Scan	(	const char *	fn,
		TList *	roots
	)

static

Scan TEntryList in 'fn' to find the common parts of paths.

If 'roots' is defined, add the found roots to the list as TObjStrings. Return the number of common root paths found.

Definition at line 1496 of file TEntryList.cxx.

Int_t TEntryList::ScanPaths	(	TList *	roots,
		Bool_t	notify = `kTRUE`
	)

virtual

Scan the paths to find the common roots.

If 'roots' is defined, add the found roots to the list as TObjStrings. Return the number of roots found.

Definition at line 1439 of file TEntryList.cxx.

Referenced by Scan(), and ScanPaths().

void TEntryList::SetDirectory ( TDirectory * dir )

virtual

Add reference to directory dir. dir can be 0.

Definition at line 1058 of file TEntryList.cxx.

Referenced by DetachRes(), DirectoryAutoAdd(), TChain::SetEntryListFile(), TChain::SetEventList(), TTree::SetEventList(), and SetTree().

virtual void TEntryList::SetEntriesToProcess ( Long64_t nen )

inlinevirtual

Definition at line 93 of file TEntryList.h.

Referenced by TDSetElement::SetEntryList().

virtual void TEntryList::SetFileName ( const char * filename )

inlinevirtual

Definition at line 98 of file TEntryList.h.

virtual void TEntryList::SetReapplyCut ( Bool_t apply = kFALSE )

inlinevirtual

Definition at line 100 of file TEntryList.h.

virtual void TEntryList::SetShift ( Bool_t shift )

inlinevirtual

Definition at line 94 of file TEntryList.h.

Referenced by TChain::SetEntryList().

void TEntryList::SetTree ( const TTree * tree )

virtual

If a list for a tree with such name and filename exists, sets it as the current sublist If not, creates this list and sets it as the current sublist The name of the file, where the tree is, is taken as tree->GetTree()->GetCurrentFile()->GetName(), and then expanded either to the absolute path, or to full url.

If, for some reason, you want to provide the filename in a different format, use SetTree(const char *treename, const char *filename), where the filename is taken "as is".

Reimplemented in TEntryListArray, TEntryListFromFile, and TEntryListArray.

Definition at line 1184 of file TEntryList.cxx.

Referenced by Contains(), Enter(), TEventIterTree::GetNextEvent(), TEventIterTree::GetNextPacket(), Remove(), TTree::SetEntryList(), TEntryListArray::SetTree(), and TEntryList().