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Reference Guide
TSelectorEntries Class Reference

The class is derived from the ROOT class TSelector. For more information on the TSelector framework see $ROOTSYS/README/README.SELECTOR or the ROOT User Manual.

The following methods are defined in this file:

  • Begin(): called everytime a loop on the tree starts, a convenient place to create your histograms.
  • SlaveBegin(): called after Begin(), when on PROOF called only on the slave servers.
  • Process(): called for each event, in this function you decide what to read and fill your histograms.
  • SlaveTerminate: called at the end of the loop on the tree, when on PROOF called only on the slave servers.
  • Terminate(): called at the end of the loop on the tree, a convenient place to draw/fit your histograms.

To use this file, try the following session on your Tree T:

Root > T->Process("TSelectorEntries.C")
Root > T->Process("TSelectorEntries.C","some options")
Root > T->Process("TSelectorEntries.C+")

Definition at line 34 of file TSelectorEntries.h.

Public Member Functions

 TSelectorEntries (const char *selection)
 Constructor. More...
 
 TSelectorEntries (TTree *tree=0, const char *selection=0)
 Default, constructor. More...
 
virtual ~TSelectorEntries ()
 Destructor. More...
 
virtual void Begin (TTree *tree)
 The Begin() function is called at the start of the query. More...
 
virtual Int_t GetEntry (Long64_t entry, Int_t getall=0)
 Read entry. More...
 
virtual TListGetOutputList () const
 
virtual Long64_t GetSelectedRows () const
 
virtual void Init (TTree *tree)
 The Init() function is called when the selector needs to initialize a new tree or chain. More...
 
virtual Bool_t Notify ()
 This function is called at the first entry of a new tree in a chain. More...
 
virtual Bool_t Process (Long64_t entry)
 The Process() function is called for each entry in the tree (or possibly keyed object in the case of PROOF) to be processed. More...
 
virtual void SetObject (TObject *obj)
 
virtual void SetOption (const char *option)
 
virtual void SetSelection (const char *selection)
 Set the selection expression. More...
 
virtual void SlaveBegin (TTree *tree)
 The SlaveBegin() function is called after the Begin() function. More...
 
virtual void SlaveTerminate ()
 The SlaveTerminate() function is called after all entries or objects have been processed. More...
 
virtual void Terminate ()
 The Terminate() function is the last function to be called during a query. More...
 
virtual Int_t Version () const
 
- Public Member Functions inherited from TSelector
 TSelector ()
 Default selector ctor. More...
 
virtual ~TSelector ()
 Selector destructor. More...
 
virtual void Abort (const char *why, EAbort what=kAbortProcess)
 Abort processing. More...
 
virtual EAbort GetAbort () const
 
virtual TListGetInputList () const
 
virtual const char * GetOption () const
 
virtual Long64_t GetStatus () const
 
virtual void ImportOutput (TList *output)
 Imports the content of 'output' in the internal output list. More...
 
virtual Bool_t ProcessCut (Long64_t)
 
virtual void ProcessFill (Long64_t)
 
virtual void ResetAbort ()
 
virtual void SetInputList (TList *input)
 
virtual void SetStatus (Long64_t status)
 
- 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 ()
 Check and record whether 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 Clear (Option_t *="")
 
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 abstract method. More...
 
virtual void Copy (TObject &object) const
 Copy this to obj. 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 const char * GetName () const
 Returns 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 const char * GetTitle () const
 Returns title of object. More...
 
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...
 
virtual ULong_t Hash () const
 Return hash value for this object. 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
 
virtual Bool_t IsSortable () const
 
R__ALWAYS_INLINE Bool_t IsZombie () const
 
virtual void ls (Option_t *option="") const
 The ls function lists the contents of a class on stdout. 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...
 
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 void Print (Option_t *option="") const
 This method must be overridden when a class wants to print itself. 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)
 
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f. 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 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...
 

Public Attributes

TTreefChain
 
TTreeFormulafSelect
 pointer to the analyzed TTree or TChain More...
 
Long64_t fSelectedRows
 
Bool_t fSelectMultiple
 

Private Attributes

Bool_t fOwnInput
 

Additional Inherited Members

- Public Types inherited from TSelector
enum  EAbort { kContinue, kAbortProcess, kAbortFile }
 
- 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)
}
 
- Static Public Member Functions inherited from TSelector
static TSelectorGetSelector (const char *filename)
 The code in filename is loaded (interpreted or compiled, see below), filename must contain a valid class implementation derived from TSelector. More...
 
static Bool_t IsStandardDraw (const char *selec)
 Find out if this is a standard selection used for Draw actions (either TSelectorDraw, TProofDraw or deriving from them). 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 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 inherited from TSelector
EAbort fAbort
 Abort status. More...
 
TListfInput
 List of objects available during processing. More...
 
TObjectfObject
 ! Current object if processing object (vs. TTree) More...
 
TString fOption
 Option given to TTree::Process. More...
 
TSelectorListfOutput
 ! List of objects created during processing More...
 
Long64_t fStatus
 Selector status. More...
 

#include <TSelectorEntries.h>

Inheritance diagram for TSelectorEntries:
[legend]

Constructor & Destructor Documentation

◆ TSelectorEntries() [1/2]

TSelectorEntries::TSelectorEntries ( TTree tree = 0,
const char *  selection = 0 
)

Default, constructor.

Definition at line 46 of file TSelectorEntries.cxx.

◆ TSelectorEntries() [2/2]

TSelectorEntries::TSelectorEntries ( const char *  selection)

Constructor.

Definition at line 57 of file TSelectorEntries.cxx.

◆ ~TSelectorEntries()

TSelectorEntries::~TSelectorEntries ( )
virtual

Destructor.

Definition at line 66 of file TSelectorEntries.cxx.

Member Function Documentation

◆ Begin()

void TSelectorEntries::Begin ( TTree tree)
virtual

The Begin() function is called at the start of the query.

When running with PROOF Begin() is only called on the client. The tree argument is deprecated (on PROOF 0 is passed).

Reimplemented from TSelector.

Definition at line 81 of file TSelectorEntries.cxx.

◆ GetEntry()

Int_t TSelectorEntries::GetEntry ( Long64_t  entry,
Int_t  getall = 0 
)
virtual

Read entry.

Reimplemented from TSelector.

Definition at line 115 of file TSelectorEntries.cxx.

◆ GetOutputList()

virtual TList* TSelectorEntries::GetOutputList ( ) const
inlinevirtual

Reimplemented from TSelector.

Definition at line 56 of file TSelectorEntries.h.

◆ GetSelectedRows()

virtual Long64_t TSelectorEntries::GetSelectedRows ( ) const
inlinevirtual

Definition at line 52 of file TSelectorEntries.h.

◆ Init()

void TSelectorEntries::Init ( TTree tree)
virtual

The Init() function is called when the selector needs to initialize a new tree or chain.

Typically here the branch addresses and branch pointers of the tree will be set. It is normally not necessary to make changes to the generated code, but the routine can be extended by the user if needed. Init() will be called many times when running on PROOF (once per file to be processed).

Reimplemented from TSelector.

Definition at line 129 of file TSelectorEntries.cxx.

◆ Notify()

Bool_t TSelectorEntries::Notify ( )
virtual

This function is called at the first entry of a new tree in a chain.

Reimplemented from TSelector.

Definition at line 136 of file TSelectorEntries.cxx.

◆ Process()

Bool_t TSelectorEntries::Process ( Long64_t  entry)
virtual

The Process() function is called for each entry in the tree (or possibly keyed object in the case of PROOF) to be processed.

The entry argument specifies which entry in the currently loaded tree is to be processed. It can be passed to either TSelectorEntries::GetEntry() or TBranch::GetEntry() to read either all or the required parts of the data. When processing keyed objects with PROOF, the object is already loaded and is available via the fObject pointer.

This function should contain the "body" of the analysis. It can contain simple or elaborate selection criteria, run algorithms on the data of the event and typically fill histograms.

The processing can be stopped by calling Abort().

Use fStatus to set the return value of TTree::Process().

The return value is currently not used.

Reimplemented from TSelector.

Definition at line 161 of file TSelectorEntries.cxx.

◆ SetObject()

virtual void TSelectorEntries::SetObject ( TObject obj)
inlinevirtual

Reimplemented from TSelector.

Definition at line 54 of file TSelectorEntries.h.

◆ SetOption()

virtual void TSelectorEntries::SetOption ( const char *  option)
inlinevirtual

Reimplemented from TSelector.

Definition at line 53 of file TSelectorEntries.h.

◆ SetSelection()

void TSelectorEntries::SetSelection ( const char *  selection)
virtual

Set the selection expression.

Definition at line 198 of file TSelectorEntries.cxx.

◆ SlaveBegin()

void TSelectorEntries::SlaveBegin ( TTree tree)
virtual

The SlaveBegin() function is called after the Begin() function.

When running with PROOF SlaveBegin() is called on each slave server. The tree argument is deprecated (on PROOF 0 is passed).

Reimplemented from TSelector.

Definition at line 92 of file TSelectorEntries.cxx.

◆ SlaveTerminate()

void TSelectorEntries::SlaveTerminate ( )
virtual

The SlaveTerminate() function is called after all entries or objects have been processed.

When running with PROOF SlaveTerminate() is called on each slave server.

Reimplemented from TSelector.

Definition at line 217 of file TSelectorEntries.cxx.

◆ Terminate()

void TSelectorEntries::Terminate ( )
virtual

The Terminate() function is the last function to be called during a query.

It always runs on the client, it can be used to present the results graphically or save the results to file.

Reimplemented from TSelector.

Definition at line 227 of file TSelectorEntries.cxx.

◆ Version()

virtual Int_t TSelectorEntries::Version ( ) const
inlinevirtual

Reimplemented from TSelector.

Definition at line 45 of file TSelectorEntries.h.

Member Data Documentation

◆ fChain

TTree* TSelectorEntries::fChain

Definition at line 37 of file TSelectorEntries.h.

◆ fOwnInput

Bool_t TSelectorEntries::fOwnInput
private

Definition at line 35 of file TSelectorEntries.h.

◆ fSelect

TTreeFormula* TSelectorEntries::fSelect

pointer to the analyzed TTree or TChain

Definition at line 38 of file TSelectorEntries.h.

◆ fSelectedRows

Long64_t TSelectorEntries::fSelectedRows

Definition at line 39 of file TSelectorEntries.h.

◆ fSelectMultiple

Bool_t TSelectorEntries::fSelectMultiple

Definition at line 40 of file TSelectorEntries.h.

Libraries for TSelectorEntries:
[legend]

The documentation for this class was generated from the following files:
xmlio::Root
const char * Root
Definition: TXMLSetup.cxx:53
ROOT::Math::Chebyshev::T
double T(double x)
Definition: ChebyshevPol.h:52