Logo ROOT   6.11/03
Reference Guide
List of all members | Public Types | Public Member Functions | Static Public Member Functions | Protected Member Functions | Protected Attributes | Private Member Functions | Friends | List of all members
TEntryList Class Reference

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.

pict1_TEntryList_001.png

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.

pict1_TEntryList_002.png

Operations on entry lists

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 *chain = new TChain("ntuple");
chain->Add("hsimple.root");
chain->Add("hsimple2.root");
Long64_t listEntries = myelist->GetN();
Long64_t chainEntries = chain->GetEntries();
Int_t treenum = 0;
chain->SetEntryList(myelist);
for (entry=start;entry < end;entry++) {
entryNumber = chain->GetEntryNumber(entry);
if (entryNumber < 0) break;
localEntry = chain->LoadTree(entryNumber);
if (localEntry < 0) break;
....
then either call
branch->GetEntry(localEntry);
or
chain->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 25 of file TEntryList.h.

Public Types

enum  { kBlockSize = 64000 }
 
- Public Types inherited from TObject
enum  {
  kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kInconsistent = 0x08000000,
  kBitMask = 0x00ffffff
}
 
enum  { kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }
 
enum  EDeprecatedStatusBits { kObjInCanvas = BIT(3) }
 
enum  EStatusBits {
  kCanDelete = BIT(0), kMustCleanup = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5),
  kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13)
}
 

Public Member Functions

 TEntryList ()
 default c-tor More...
 
 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 TEntryListGetCurrentList () const
 
virtual TDirectoryGetDirectory () const
 
virtual Long64_t GetEntriesToProcess () const
 
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 TEntryListGetEntryList (const char *treename, const char *filename, Option_t *opt="")
 Return the entry list, corresponding 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 const char * GetFileName () const
 
virtual TListGetLists () const
 
virtual Long64_t GetN () const
 
virtual Bool_t GetReapplyCut () const
 
virtual const char * GetTreeName () const
 
virtual Int_t GetTreeNumber () const
 
Bool_t IsValid () 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 void Print (const Option_t *option="") const
 Print this list. 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 SetDirectory (TDirectory *dir)
 Add reference to directory dir. dir can be 0. More...
 
virtual void SetEntriesToProcess (Long64_t nen)
 
virtual void SetFileName (const char *filename)
 
virtual void SetReapplyCut (Bool_t apply=kFALSE)
 
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 SetTreeNumber (Int_t index)
 
virtual void Subtract (const TEntryList *elist)
 Remove all the entries of this entry list, that are contained in elist. More...
 
- Public Member Functions inherited from TNamed
 TNamed ()
 
 TNamed (const char *name, const char *title)
 
 TNamed (const TString &name, const TString &title)
 
 TNamed (const TNamed &named)
 TNamed copy ctor. More...
 
virtual ~TNamed ()
 TNamed destructor. More...
 
virtual void Clear (Option_t *option="")
 Set name and title to empty strings (""). More...
 
virtual TObjectClone (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 ls (Option_t *option="") const
 List TNamed name and title. More...
 
TNamedoperator= (const TNamed &rhs)
 TNamed assignment operator. More...
 
virtual void Print (Option_t *option="") const
 Print TNamed name and title. More...
 
virtual void SetName (const char *name)
 Set the name of the TNamed. More...
 
virtual void SetNameTitle (const char *name, const char *title)
 Set all the TNamed parameters (name and title). More...
 
virtual void SetTitle (const char *title="")
 Set the title of the TNamed. More...
 
virtual Int_t Sizeof () const
 Return size of the TNamed part of the TObject. More...
 
- Public Member Functions inherited from TObject
 TObject ()
 TObject constructor. More...
 
 TObject (const TObject &object)
 TObject copy ctor. More...
 
virtual ~TObject ()
 TObject destructor. 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...
 
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...
 
ULong_t CheckedHash ()
 Checked and record whether for this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object. 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 TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad). More...
 
virtual void Dump () const
 Dump contents of object on stdout. More...
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message. 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 void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message. More...
 
virtual TObjectFindObject (const char *name) const
 Must be redefined in derived classes. More...
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes. More...
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object. More...
 
virtual const char * GetIconName () const
 Returns mime type name of object. More...
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py). More...
 
virtual Option_tGetOption () const
 
virtual UInt_t GetUniqueID () const
 Return the unique object id. More...
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out. More...
 
Bool_t HasInconsistentHash () const
 Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e. More...
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message. 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...
 
void InvertBit (UInt_t f)
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory). More...
 
virtual Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
 
R__ALWAYS_INLINE Bool_t IsOnHeap () const
 
R__ALWAYS_INLINE Bool_t IsZombie () const
 
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...
 
virtual Bool_t Notify ()
 This method must be overridden to handle object notification. More...
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete. More...
 
void operator delete (void *ptr)
 Operator delete. More...
 
void operator delete[] (void *ptr)
 Operator delete []. More...
 
voidoperator new (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator new[] (size_t sz)
 
voidoperator new[] (size_t sz, void *vp)
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator. 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...
 
void ResetBit (UInt_t f)
 
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...
 
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)
 
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 SysError (const char *method, const char *msgfmt,...) const
 Issue system error message. More...
 
R__ALWAYS_INLINE Bool_t TestBit (UInt_t f) const
 
Int_t TestBits (UInt_t f) const
 
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 void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message. 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...
 

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 Bool_t GetObjectStat ()
 Get status of object stat flag. More...
 
static void SetDtorOnly (void *obj)
 Set destructor only 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
virtual void DoError (int level, const char *location, const char *fmt, va_list va) const
 Interface to ErrorHandler (protected). More...
 
void MakeZombie ()
 

Protected Attributes

TObjArrayfBlocks
 blocks with indices of passing events (TEntryListBlocks) More...
 
TEntryListfCurrent
 ! currently filled entry list More...
 
TDirectoryfDirectory
 ! Pointer to directory holding this tree More...
 
Long64_t fEntriesToProcess
 used on proof to set the number of entries to process in a packet More...
 
TString fFileName
 name of the file, where the tree is More...
 
Long64_t fLastIndexQueried
 ! used to optimize GetEntry() function from a loop More...
 
Long64_t fLastIndexReturned
 ! used to optimize GetEntry() function from a loop More...
 
TListfLists
 a list of underlying entry lists for each tree of a chain More...
 
Long64_t fN
 number of entries in the list More...
 
Int_t fNBlocks
 number of TEntryListBlocks More...
 
Bool_t fReapply
 If true, TTree::Draw will 'reapply' the original cut. More...
 
Bool_t fShift
 ! true when some sub-lists don't correspond to trees (when the entry list is used as input in TChain) More...
 
ULong_t fStringHash
 ! Hash value of a string of treename and filename More...
 
TString fTreeName
 name of the tree More...
 
Int_t fTreeNumber
 ! the index of the tree in the chain (used when the entry list is used as input (TTree::SetEntryList()) More...
 
- Protected Attributes inherited from TNamed
TString fName
 
TString fTitle
 

Private Member Functions

TEntryListoperator= (const TEntryList &)
 

Friends

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

#include <TEntryList.h>

Inheritance diagram for TEntryList:
[legend]

Member Enumeration Documentation

anonymous enum
Enumerator
kBlockSize 

Definition at line 54 of file TEntryList.h.

Constructor & Destructor Documentation

TEntryList::TEntryList ( )

default c-tor

Definition at line 163 of file TEntryList.cxx.

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

c-tor with name and title

Definition at line 184 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 210 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 232 of file TEntryList.cxx.

TEntryList::TEntryList ( const TTree tree)

c-tor, which sets the tree

Definition at line 254 of file TEntryList.cxx.

TEntryList::TEntryList ( const TEntryList elist)

copy c-tor

Definition at line 277 of file TEntryList.cxx.

TEntryList::~TEntryList ( )
virtual

Destructor.

Definition at line 325 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 347 of file TEntryList.cxx.

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 521 of file TEntryList.cxx.

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 550 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, TEntryListFromFile, and TEntryListArray.

Definition at line 562 of file TEntryList.cxx.

virtual TEntryList* TEntryList::GetCurrentList ( ) const
inlinevirtual

Reimplemented in TEntryListFromFile.

Definition at line 68 of file TEntryList.h.

virtual TDirectory* TEntryList::GetDirectory ( ) const
inlinevirtual

Definition at line 74 of file TEntryList.h.

virtual Long64_t TEntryList::GetEntriesToProcess ( ) const
inlinevirtual

Definition at line 72 of file TEntryList.h.

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 657 of file TEntryList.cxx.

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 733 of file TEntryList.cxx.

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

Return the entry list, corresponding 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 781 of file TEntryList.cxx.

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 762 of file TEntryList.cxx.

virtual const char* TEntryList::GetFileName ( ) const
inlinevirtual

Reimplemented in TEntryListFromFile.

Definition at line 77 of file TEntryList.h.

virtual TList* TEntryList::GetLists ( ) const
inlinevirtual

Definition at line 73 of file TEntryList.h.

virtual Long64_t TEntryList::GetN ( ) const
inlinevirtual

Reimplemented in TEntryListFromFile.

Definition at line 75 of file TEntryList.h.

virtual Bool_t TEntryList::GetReapplyCut ( ) const
inlinevirtual

Definition at line 79 of file TEntryList.h.

virtual const char* TEntryList::GetTreeName ( ) const
inlinevirtual

Reimplemented in TEntryListFromFile.

Definition at line 76 of file TEntryList.h.

virtual Int_t TEntryList::GetTreeNumber ( ) const
inlinevirtual

Reimplemented in TEntryListFromFile.

Definition at line 78 of file TEntryList.h.

Bool_t TEntryList::IsValid ( ) const
inline

Definition at line 81 of file TEntryList.h.

Int_t TEntryList::Merge ( TCollection list)
virtual

Merge this list with the lists from the collection.

Reimplemented in TEntryListFromFile.

Definition at line 871 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 890 of file TEntryList.cxx.

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 977 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 993 of file TEntryList.cxx.

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 1357 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 1298 of file TEntryList.cxx.

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 617 of file TEntryList.cxx.

void TEntryList::Reset ( void  )
virtual

Reset this list.

Reimplemented in TEntryListArray, and TEntryListArray.

Definition at line 1030 of file TEntryList.cxx.

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 1500 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 1443 of file TEntryList.cxx.

void TEntryList::SetDirectory ( TDirectory dir)
virtual

Add reference to directory dir. dir can be 0.

Definition at line 1062 of file TEntryList.cxx.

virtual void TEntryList::SetEntriesToProcess ( Long64_t  nen)
inlinevirtual

Definition at line 98 of file TEntryList.h.

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

Definition at line 103 of file TEntryList.h.

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

Definition at line 105 of file TEntryList.h.

virtual void TEntryList::SetShift ( Bool_t  shift)
inlinevirtual

Definition at line 99 of file TEntryList.h.

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 1188 of file TEntryList.cxx.

void TEntryList::SetTree ( const char *  treename,
const char *  filename 
)
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 filename is taken as provided, no extensions to full path or url !

Reimplemented in TEntryListArray, TEntryListFromFile, and TEntryListArray.

Definition at line 1076 of file TEntryList.cxx.

virtual void TEntryList::SetTreeName ( const char *  treename)
inlinevirtual

Definition at line 102 of file TEntryList.h.

virtual void TEntryList::SetTreeNumber ( Int_t  index)
inlinevirtual

Reimplemented in TEntryListFromFile.

Definition at line 104 of file TEntryList.h.

void TEntryList::Subtract ( const TEntryList elist)
virtual

Remove all the entries of this entry list, that are contained in elist.

Reimplemented in TEntryListArray, TEntryListFromFile, and TEntryListArray.

Definition at line 1224 of file TEntryList.cxx.

Friends And Related Function Documentation

TEntryList operator|| ( TEntryList elist1,
TEntryList elist2 
)
friend

Definition at line 1277 of file TEntryList.cxx.

Member Data Documentation

TObjArray* TEntryList::fBlocks
protected

blocks with indices of passing events (TEntryListBlocks)

Definition at line 35 of file TEntryList.h.

TEntryList* TEntryList::fCurrent
protected

! currently filled entry list

Definition at line 32 of file TEntryList.h.

TDirectory* TEntryList::fDirectory
protected

! Pointer to directory holding this tree

Definition at line 48 of file TEntryList.h.

Long64_t TEntryList::fEntriesToProcess
protected

used on proof to set the number of entries to process in a packet

Definition at line 37 of file TEntryList.h.

TString TEntryList::fFileName
protected

name of the file, where the tree is

Definition at line 39 of file TEntryList.h.

Long64_t TEntryList::fLastIndexQueried
protected

! used to optimize GetEntry() function from a loop

Definition at line 44 of file TEntryList.h.

Long64_t TEntryList::fLastIndexReturned
protected

! used to optimize GetEntry() function from a loop

Definition at line 45 of file TEntryList.h.

TList* TEntryList::fLists
protected

a list of underlying entry lists for each tree of a chain

Definition at line 31 of file TEntryList.h.

Long64_t TEntryList::fN
protected

number of entries in the list

Definition at line 36 of file TEntryList.h.

Int_t TEntryList::fNBlocks
protected

number of TEntryListBlocks

Definition at line 34 of file TEntryList.h.

Bool_t TEntryList::fReapply
protected

If true, TTree::Draw will 'reapply' the original cut.

Definition at line 49 of file TEntryList.h.

Bool_t TEntryList::fShift
protected

! true when some sub-lists don't correspond to trees (when the entry list is used as input in TChain)

Definition at line 46 of file TEntryList.h.

ULong_t TEntryList::fStringHash
protected

! Hash value of a string of treename and filename

Definition at line 40 of file TEntryList.h.

TString TEntryList::fTreeName
protected

name of the tree

Definition at line 38 of file TEntryList.h.

Int_t TEntryList::fTreeNumber
protected

! the index of the tree in the chain (used when the entry list is used as input (TTree::SetEntryList())

Definition at line 41 of file TEntryList.h.

Libraries for TEntryList:
[legend]

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