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class TEntryListFromFile: public TEntryList

 TEntryListFromFile

 Manages entry lists from different files, when they are not loaded
 in memory at the same time.

 This entry list should only be used when processing a TChain (see
 TChain::SetEntryList() function). File naming convention:
 - by default, filename_elist.root is used, where filename is the
   name of the chain element.
 - xxx$xxx.root - $ sign is replaced by the name of the chain element
 If the list name is not specified (by passing filename_elist.root/listname to
 the TChain::SetEntryList() function, the first object of class TEntryList
 in the file is taken.
 It is assumed that there are as many lists, as there are chain elements,
 and they are in the same order.

 If one of the list files can't be opened, or there is an error reading a list
 from the file, this list is skipped and the entry loop continues on the next
 list.

Function Members (Methods)

public:

	TEntryListFromFile()
	TEntryListFromFile(const char* filename, const char* listname, Int_t nfiles)
virtual	~TEntryListFromFile()
void	TObject::AbstractMethod(const char* method) const
virtual void	Add(const TEntryList*)
virtual void	TObject::AppendPad(Option_t* option = "")
virtual void	TObject::Browse(TBrowser* b)
static TClass*	Class()
virtual const char*	TObject::ClassName() const
virtual void	TNamed::Clear(Option_t* option = "")
virtual TObject*	TNamed::Clone(const char* newname = "") const
virtual Int_t	TNamed::Compare(const TObject* obj) const
virtual Int_t	Contains(Long64_t, TTree*)
virtual void	TNamed::Copy(TObject& named) const
virtual void	TObject::Delete(Option_t* option = "")MENU
virtual void	TEntryList::DirectoryAutoAdd(TDirectory*)
virtual Int_t	TObject::DistancetoPrimitive(Int_t px, Int_t py)
virtual void	TObject::Draw(Option_t* option = "")
virtual void	TObject::DrawClass() constMENU
virtual TObject*	TObject::DrawClone(Option_t* option = "") constMENU
virtual void	TObject::Dump() constMENU
virtual Bool_t	Enter(Long64_t, TTree*)
virtual void	TObject::Error(const char* method, const char* msgfmt) const
virtual void	TObject::Execute(const char* method, const char* params, Int_t* error = 0)
virtual void	TObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)
virtual void	TObject::ExecuteEvent(Int_t event, Int_t px, Int_t py)
virtual void	TObject::Fatal(const char* method, const char* msgfmt) const
virtual void	TNamed::FillBuffer(char*& buffer)
virtual TObject*	TObject::FindObject(const char* name) const
virtual TObject*	TObject::FindObject(const TObject* obj) const
virtual TEntryList*	GetCurrentList() const
virtual TDirectory*	TEntryList::GetDirectory() const
virtual Option_t*	TObject::GetDrawOption() const
static Long_t	TObject::GetDtorOnly()
virtual Long64_t	GetEntries()
virtual Long64_t	GetEntriesFast() const
virtual Long64_t	TEntryList::GetEntriesToProcess() const
virtual Long64_t	GetEntry(Int_t index)
virtual Long64_t	GetEntryAndTree(Int_t index, Int_t& treenum)
virtual TEntryList*	GetEntryList(const char, const char, Option_t*)
virtual const char*	GetFileName() const
virtual const char*	TObject::GetIconName() const
virtual TList*	TEntryList::GetLists() const
virtual Long64_t	GetN() const
virtual const char*	TNamed::GetName() const
virtual char*	TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_t	TObject::GetObjectStat()
virtual Option_t*	TObject::GetOption() const
virtual Bool_t	TEntryList::GetReapplyCut() const
virtual const char*	TNamed::GetTitle() const
virtual const char*	GetTreeName() const
virtual Int_t	GetTreeNumber() const
virtual UInt_t	TObject::GetUniqueID() const
virtual Bool_t	TObject::HandleTimer(TTimer* timer)
virtual ULong_t	TNamed::Hash() const
virtual void	TObject::Info(const char* method, const char* msgfmt) const
virtual Bool_t	TObject::InheritsFrom(const char* classname) const
virtual Bool_t	TObject::InheritsFrom(const TClass* cl) const
virtual void	TObject::Inspect() constMENU
void	TObject::InvertBit(UInt_t f)
virtual TClass*	IsA() const
virtual Bool_t	TObject::IsEqual(const TObject* obj) const
virtual Bool_t	TObject::IsFolder() const
Bool_t	TObject::IsOnHeap() const
virtual Bool_t	TNamed::IsSortable() const
Bool_t	TObject::IsZombie() const
virtual Int_t	LoadList(Int_t listnumber)
virtual void	TNamed::ls(Option_t* option = "") const
void	TObject::MayNotUse(const char* method) const
virtual Int_t	Merge(TCollection*)
virtual Long64_t	Next()
virtual Bool_t	TObject::Notify()
void	TObject::Obsolete(const char* method, const char* asOfVers, const char* removedFromVers) const
static void	TObject::operator delete(void* ptr)
static void	TObject::operator delete(void* ptr, void* vp)
static void	TObject::operator delete[](void* ptr)
static void	TObject::operator delete[](void* ptr, void* vp)
void*	TObject::operator new(size_t sz)
void*	TObject::operator new(size_t sz, void* vp)
void*	TObject::operator new[](size_t sz)
void*	TObject::operator new[](size_t sz, void* vp)
virtual void	OptimizeStorage()
virtual void	TObject::Paint(Option_t* option = "")
virtual void	TObject::Pop()
virtual void	Print(Option_t* option = "") const
virtual Int_t	TObject::Read(const char* name)
virtual void	TObject::RecursiveRemove(TObject* obj)
static Int_t	TEntryList::Relocate(const char* fn, const char* newroot, const char* oldroot = 0, const char* enlnm = 0)
virtual Int_t	TEntryList::RelocatePaths(const char* newloc, const char* oldloc = 0)
virtual Bool_t	Remove(Long64_t, TTree*)
virtual void	TEntryList::Reset()
void	TObject::ResetBit(UInt_t f)
virtual void	TObject::SaveAs(const char* filename = "", Option_t* option = "") constMENU
virtual void	TObject::SavePrimitive(ostream& out, Option_t* option = "")
static Int_t	TEntryList::Scan(const char* fn, TList* roots)
virtual Int_t	TEntryList::ScanPaths(TList* roots, Bool_t notify = kTRUE)
void	TObject::SetBit(UInt_t f)
void	TObject::SetBit(UInt_t f, Bool_t set)
virtual void	TEntryList::SetDirectory(TDirectory* dir)
virtual void	TObject::SetDrawOption(Option_t* option = "")MENU
static void	TObject::SetDtorOnly(void* obj)
virtual void	TEntryList::SetEntriesToProcess(Long64_t nen)
virtual void	TEntryList::SetFileName(const char* filename)
virtual void	SetFileNames(TObjArray* names)
virtual void	TNamed::SetName(const char* name)MENU
virtual void	TNamed::SetNameTitle(const char* name, const char* title)
virtual void	SetNFiles(Int_t nfiles)
static void	TObject::SetObjectStat(Bool_t stat)
virtual void	TEntryList::SetReapplyCut(Bool_t apply = kFALSE)TOGGLE
virtual void	TEntryList::SetShift(Bool_t shift)
virtual void	TNamed::SetTitle(const char* title = "")MENU
virtual void	SetTree(const TTree*)
virtual void	SetTree(const char, const char)
virtual void	TEntryList::SetTreeName(const char* treename)
virtual void	SetTreeNumber(Int_t index)
virtual void	TObject::SetUniqueID(UInt_t uid)
virtual void	ShowMembers(TMemberInspector&)
virtual Int_t	TNamed::Sizeof() const
virtual void	Streamer(TBuffer&)
void	StreamerNVirtual(TBuffer& ClassDef_StreamerNVirtual_b)
virtual void	Subtract(const TEntryList*)
virtual void	TObject::SysError(const char* method, const char* msgfmt) const
Bool_t	TObject::TestBit(UInt_t f) const
Int_t	TObject::TestBits(UInt_t f) const
virtual void	TObject::UseCurrentStyle()
virtual void	TObject::Warning(const char* method, const char* msgfmt) const
virtual Int_t	TObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0)
virtual Int_t	TObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0) const

protected:

virtual void	TObject::DoError(int level, const char* location, const char* fmt, va_list va) const
void	TObject::MakeZombie()

private:

	TEntryListFromFile(const TEntryListFromFile&)
TEntryListFromFile&	operator=(const TEntryListFromFile&)

Data Members

public:

enum {	kBigNumber
};
enum TEntryList::[unnamed] {	kBlockSize
};
enum TObject::EStatusBits {	kCanDelete
	kMustCleanup
	kObjInCanvas
	kIsReferenced
	kHasUUID
	kCannotPick
	kNoContextMenu
	kInvalidObject
};
enum TObject::[unnamed] {	kIsOnHeap
	kNotDeleted
	kZombie
	kBitMask
	kSingleKey
	kOverwrite
	kWriteDelete
};

protected:

TObjArray*	TEntryList::fBlocks	blocks with indices of passing events (TEntryListBlocks)
TEntryList*	TEntryList::fCurrent	! currently filled entry list
TDirectory*	TEntryList::fDirectory	! Pointer to directory holding this tree
Long64_t	TEntryList::fEntriesToProcess	used on proof to set the number of entries to process in a packet
TFile*	fFile	currently open file
TString	TEntryList::fFileName	name of the file, where the tree is
TObjArray*	fFileNames	! points to the fFiles data member of the corresponding chain
Long64_t	TEntryList::fLastIndexQueried	! used to optimize GetEntry() function from a loop
Long64_t	TEntryList::fLastIndexReturned	! used to optimize GetEntry() function from a loop
TString	fListFileName	from this string names of all files can be found
TString	fListName	name of the list
Long64_t*	fListOffset	[fNFiles] numbers of entries in ind. lists
TList*	TEntryList::fLists	a list of underlying entry lists for each tree of a chain
Long64_t	TEntryList::fN	number of entries in the list
Int_t	TEntryList::fNBlocks	number of TEntryListBlocks
Int_t	fNFiles	total number of files
TString	TNamed::fName	object identifier
Bool_t	TEntryList::fReapply	If true, TTree::Draw will 'reapply' the original cut
Bool_t	TEntryList::fShift	! true when some sub-lists don't correspond to trees
ULong_t	TEntryList::fStringHash	! Hash value of a string of treename and filename
TString	TNamed::fTitle	object title
TString	TEntryList::fTreeName	name of the tree
Int_t	TEntryList::fTreeNumber	! the index of the tree in the chain (used when the entry

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

TEntryListFromFile()

 default constructor.

TEntryListFromFile(const char* filename, const char* listname, Int_t nfiles)

 File naming convention:
 - by default, filename_elist.root is used, where filename is the
   name of the chain element
 - xxx$xxx.root - $ sign is replaced by the name of the chain element
 The TObjArray of chain elements is set by the TEntryListFromFile::SetFileNames()
 function.
 If the list name is not specified, the first object of class TEntryList
 in the file is taken.
 nfiles is the total number of files to process

~TEntryListFromFile()

 d-tor

Long64_t GetEntry(Int_t index)

returns entry #index
See also Next() for a faster alternative

Long64_t GetEntryAndTree(Int_t index, Int_t& treenum)

return the entry corresponding to the index parameter and the
number of the tree, where this entry is

Long64_t GetEntries()

Returns the total number of entries in the list.
If some lists have not been loaded, loads them.

Long64_t Next()

Returns the next entry in the list.
Faster than GetEntry()

Int_t LoadList(Int_t listnumber)

Loads the list #listnumber
This is the only function that can modify fCurrent and fFile data members

void Print(Option_t* option = "") const

Print info about this list

TEntryListFromFile(const TEntryListFromFile& )

TEntryListFromFile & operator=(const TEntryListFromFile& )

void Add(const TEntryList* )

{}

Int_t Contains(Long64_t , TTree* )

{return 0;}

Bool_t Enter(Long64_t , TTree* )

{return 0;}

TEntryList * GetCurrentList() const

{ return fCurrent; }

TEntryList * GetEntryList(const char* , const char* , Option_t* )

{return 0;}

Long64_t GetEntriesFast() const

{ return fN; }

Long64_t GetN() const

{ return fN; }

const char * GetTreeName() const

{ return fTreeName.Data(); }

const char * GetFileName() const

{ return fFileName.Data(); }

Int_t GetTreeNumber() const

{ return fTreeNumber; }

Int_t Merge(TCollection* )

{ return 0; }

void OptimizeStorage()

{}

Bool_t Remove(Long64_t , TTree* )

{ return 0; }

void SetTree(const TTree* )

{}

void SetTree(const char* , const char* )

{}

void SetFileNames(TObjArray* names)

{ fFileNames = names; }

void SetTreeNumber(Int_t index)

{ fTreeNumber=index; }

void SetNFiles(Int_t nfiles)

{ fNFiles = nfiles; }

void Subtract(const TEntryList* )

{}