This class provides file copy and merging services.

It can be used to copy files (not only ROOT files), using TFile or any of its remote file access plugins. It is therefore useful in a Grid environment where the files might be accessible only remotely. The merging interface allows files containing histograms and trees to be merged, like the standalone hadd program.

Definition at line 30 of file TFileMerger.h.

Public Types
enum	EPartialMergeType { kRegular = 0 , kIncremental = (1ULL << ( 1 )) , kResetable = (1ULL << ( 2 )) , kNonResetable = (1ULL << ( 3 )) , kDelayWrite = (1ULL << ( 4 )) , kAll = (1ULL << ( 2 ))\|(1ULL << ( 3 )) , kAllIncremental = kIncremental \| kAll , kOnlyListed = (1ULL << ( 5 )) , kSkipListed = (1ULL << ( 6 )) , kKeepCompression = (1ULL << ( 7 )) }
	Type of the partial merge. More...

Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff }

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

enum	EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) }

enum	EStatusBits { kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) , kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 )) }

Public Member Functions
	TFileMerger (Bool_t isLocal=kTRUE, Bool_t histoOneGo=kTRUE)
	Create file merger object.

	~TFileMerger () override
	Cleanup.

virtual Bool_t	AddAdoptFile (TFile *source, Bool_t cpProgress=kTRUE)
	Add the TFile to this file merger and give ownership of the TFile to this object (unless kFALSE is returned).

virtual Bool_t	AddFile (const char *url, Bool_t cpProgress=kTRUE)
	Add file to file merger.

virtual Bool_t	AddFile (TFile *source, Bool_t cpProgress=kTRUE)
	Add the TFile to this file merger and do not give ownership of the TFile to this object.

void	AddObjectNames (const char *name)

void	ClearObjectNames ()

virtual const char *	GetCWD ()

Int_t	GetMaxOpenedFiles () const

TList *	GetMergeList ()

const char *	GetMergeOptions ()

const char *	GetMsgPrefix () const

Bool_t	GetNotrees () const

const char *	GetObjectNames () const

TFile *	GetOutputFile () const

const char *	GetOutputFileName () const

Int_t	GetPrintLevel () const

Bool_t	HasCompressionChange () const

TClass *	IsA () const override

virtual Bool_t	Merge (Bool_t=kTRUE)
	Merge the files.

virtual Bool_t	OutputFile (const char *url, Bool_t force)
	Open merger output file.

virtual Bool_t	OutputFile (const char *url, Bool_t force, Int_t compressionLevel)
	Open merger output file.

virtual Bool_t	OutputFile (const char url, const char mode, Int_t compressionLevel)
	Open merger output file.

virtual Bool_t	OutputFile (const char url, const char mode="RECREATE")
	Open merger output file.

virtual Bool_t	OutputFile (std::unique_ptr< TFile > file)
	Set an output file opened externally by the users.

virtual Bool_t	PartialMerge (Int_t type=kAll\|kIncremental)
	Merge the files.

virtual void	PrintFiles (Option_t *options)
	Print list of files being merged.

void	RecursiveRemove (TObject *obj) override
	Intercept the case where the output TFile is deleted!

virtual void	Reset ()
	Reset merger file list.

virtual Bool_t	SetCWD (const char *)

virtual void	SetFastMethod (Bool_t fast=kTRUE)

void	SetIOFeatures (ROOT::TIOFeatures &features)

void	SetMaxOpenedFiles (Int_t newmax)
	Set a limit to the number of files that TFileMerger will open simultaneously.

void	SetMergeOptions (const std::string_view &options)

void	SetMergeOptions (const TString &options)

void	SetMsgPrefix (const char *prefix)
	Set the prefix to be used when printing informational message.

virtual void	SetNotrees (Bool_t notrees=kFALSE)

void	SetPrintLevel (Int_t level)

void	Streamer (TBuffer &) override
	Stream an object of class TObject.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor.

	TObject (const TObject &object)
	TObject copy ctor.

virtual	~TObject ()
	TObject destructor.

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

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

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

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.

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

virtual void	Clear (Option_t *="")

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

virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method.

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

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

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

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

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

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad with: `gROOT->SetSelectedPad(c1)`.

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

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

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

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

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

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

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

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

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

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

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

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

virtual Option_t *	GetOption () const

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

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

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

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

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.

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

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

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

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

void	InvertBit (UInt_t f)

Bool_t	IsDestructed () const
	IsDestructed.

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

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

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.

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).

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification (the base implementation is no-op).

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

void	operator delete (void *ptr)
	Operator delete.

void	operator delete (void ptr, void vp)
	Only called by placement new when throwing an exception.

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

void	operator delete[] (void ptr, void vp)
	Only called by placement new[] when throwing an exception.

void *	operator new (size_t sz)

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

void *	operator new[] (size_t sz)

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

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

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

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

virtual void	Print (Option_t *option="") const
	This method must be overridden when a class wants to print itself.

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

void	ResetBit (UInt_t f)

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

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

void	SetBit (UInt_t f)

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

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

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

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

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

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.

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

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

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

Static Public Member Functions
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

Static Public Member Functions inherited from TObject
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

static Longptr_t	GetDtorOnly ()
	Return destructor only flag.

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

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

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

Protected Member Functions
virtual Bool_t	AddFile (TFile *source, Bool_t own, Bool_t cpProgress)
	Add the TFile to this file merger and give ownership of the TFile to this object (unless kFALSE is returned).

virtual Bool_t	MergeOne (TDirectory target, TList sourcelist, Int_t type, TFileMergeInfo &info, TString &oldkeyname, THashList &allNames, Bool_t &status, Bool_t &onlyListed, const TString &path, TDirectory current_sourcedir, TFile current_file, TKey key, TObject obj, TIter &nextkey)

virtual Bool_t	MergeRecursive (TDirectory target, TList sourcelist, Int_t type=kRegular\|kAll)
	Merge all objects in a directory.

Bool_t	OpenExcessFiles ()
	Open up to fMaxOpenedFiles of the excess files.

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).

void	MakeZombie ()

Protected Attributes
Bool_t	fCompressionChange {kFALSE}
	True if the output and input have different compression level (default kFALSE)

TList	fExcessFiles
	! List of TObjString containing the name of the files not yet added to fFileList due to user or system limitation on the max number of files opened.

Bool_t	fExplicitCompLevel {kFALSE}
	True if the user explicitly requested a compression level change (default kFALSE)

Bool_t	fFastMethod {kTRUE}
	True if using Fast merging algorithm (default)

TList	fFileList
	A list the file (TFile*) which shall be merged.

Bool_t	fHistoOneGo
	Merger histos in one go (default is kTRUE)

TIOFeatures *	fIOFeatures {nullptr}
	IO features to use in the output file.

Bool_t	fLocal
	Makes local copies of merging files if True (default is kTRUE)

Int_t	fMaxOpenedFiles
	Maximum number of files opened at the same time by the TFileMerger.

TList	fMergeList
	list of TObjString containing the name of the files need to be merged

TString	fMergeOptions
	Options (in string format) to be passed down to the Merge functions.

TString	fMsgPrefix {"TFileMerger"}
	Prefix to be used when printing informational message (default TFileMerger)

Bool_t	fNoTrees {kFALSE}
	True if Trees should not be merged (default is kFALSE)

TString	fObjectNames
	List of object names to be either merged exclusively or skipped.

TFile *	fOutputFile {nullptr}
	The outputfile for merging.

TString	fOutputFilename
	The name of the outputfile for merging.

Int_t	fPrintLevel {0}
	How much information to print out at run time.

TStopwatch	fWatch
	Stop watch to measure file copy speed.

Private Types
using	TIOFeatures = ROOT::TIOFeatures

Private Member Functions
	TFileMerger (const TFileMerger &)=delete

TFileMerger &	operator= (const TFileMerger &)=delete

Additional Inherited Members
Protected Types inherited from TObject
enum	{ kOnlyPrepStep = (1ULL << ( 3 )) }

#include <TFileMerger.h>

Inheritance diagram for TFileMerger:

[legend]

Member Typedef Documentation

◆ TIOFeatures

using TFileMerger::TIOFeatures = ROOT::TIOFeatures

private

Definition at line 32 of file TFileMerger.h.

Member Enumeration Documentation

◆ EPartialMergeType

enum TFileMerger::EPartialMergeType

Type of the partial merge.

Enumerator
kRegular	Normal merge, overwriting the output file.
kIncremental	Merge the input file with the content of the output file (if already existing).
kResetable	Only the objects with a MergeAfterReset member function.
kNonResetable	Only the objects without a MergeAfterReset member function.
kDelayWrite	Delay the TFile write (to reduce the number of write when reusing the file)
kAll	Merge all type of objects (default)
kAllIncremental	Merge incrementally all type of objects.
kOnlyListed	Only the objects specified in fObjectNames list.
kSkipListed	Skip objects specified in fObjectNames list.
kKeepCompression	Keep compression level unchanged for each input files.

Definition at line 69 of file TFileMerger.h.

Constructor & Destructor Documentation

◆ TFileMerger() [1/2]

TFileMerger::TFileMerger ( const TFileMerger & )

privatedelete

◆ TFileMerger() [2/2]

TFileMerger::TFileMerger	(	Bool_t	isLocal = `kTRUE`,
		Bool_t	histoOneGo = `kTRUE`
	)

Create file merger object.

Definition at line 93 of file TFileMerger.cxx.

◆ ~TFileMerger()

TFileMerger::~TFileMerger ( )

override

Cleanup.

Definition at line 107 of file TFileMerger.cxx.

Member Function Documentation

◆ AddAdoptFile()

Bool_t TFileMerger::AddAdoptFile	(	TFile *	source,
		Bool_t	cpProgress = `kTRUE`
	)

virtual

Add the TFile to this file merger and give ownership of the TFile to this object (unless kFALSE is returned).

Return kTRUE if the addition was successful.

Definition at line 209 of file TFileMerger.cxx.

◆ AddFile() [1/3]

Bool_t TFileMerger::AddFile	(	const char *	url,
		Bool_t	cpProgress = `kTRUE`
	)

virtual

Add file to file merger.

Definition at line 130 of file TFileMerger.cxx.

◆ AddFile() [2/3]

Bool_t TFileMerger::AddFile	(	TFile *	source,
		Bool_t	cpProgress = `kTRUE`
	)

virtual

Add the TFile to this file merger and do not give ownership of the TFile to this object.

Return kTRUE if the addition was successful.

Definition at line 198 of file TFileMerger.cxx.

◆ AddFile() [3/3]

Bool_t TFileMerger::AddFile	(	TFile *	source,
		Bool_t	own,
		Bool_t	cpProgress
	)

protectedvirtual

Add the TFile to this file merger and give ownership of the TFile to this object (unless kFALSE is returned).

Return kTRUE if the addition was successful.

Definition at line 220 of file TFileMerger.cxx.

◆ AddObjectNames()

void TFileMerger::AddObjectNames ( const char * name )

inline

Definition at line 101 of file TFileMerger.h.

◆ Class()

static TClass * TFileMerger::Class ( )

static

Returns: TClass describing this class

◆ Class_Name()

static const char * TFileMerger::Class_Name ( )

static

Returns: Name of this class

◆ Class_Version()

static constexpr Version_t TFileMerger::Class_Version ( )

inlinestaticconstexpr

Returns: Version of this class

Definition at line 127 of file TFileMerger.h.

◆ ClearObjectNames()

void TFileMerger::ClearObjectNames ( )

inline

Definition at line 103 of file TFileMerger.h.

◆ DeclFileName()

static const char * TFileMerger::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 127 of file TFileMerger.h.

◆ GetCWD()

virtual const char * TFileMerger::GetCWD ( )

inlinevirtual

Definition at line 107 of file TFileMerger.h.

◆ GetMaxOpenedFiles()

Int_t TFileMerger::GetMaxOpenedFiles ( ) const

inline

Definition at line 93 of file TFileMerger.h.

◆ GetMergeList()

TList * TFileMerger::GetMergeList ( )

inline

Definition at line 91 of file TFileMerger.h.

◆ GetMergeOptions()

const char * TFileMerger::GetMergeOptions ( )

inline

Definition at line 97 of file TFileMerger.h.

◆ GetMsgPrefix()

const char * TFileMerger::GetMsgPrefix ( ) const

inline

Definition at line 95 of file TFileMerger.h.

◆ GetNotrees()

Bool_t TFileMerger::GetNotrees ( ) const

inline

Definition at line 123 of file TFileMerger.h.

◆ GetObjectNames()

const char * TFileMerger::GetObjectNames ( ) const

inline

Definition at line 102 of file TFileMerger.h.

◆ GetOutputFile()

TFile * TFileMerger::GetOutputFile ( ) const

inline

Definition at line 92 of file TFileMerger.h.

◆ GetOutputFileName()

const char * TFileMerger::GetOutputFileName ( ) const

inline

Definition at line 90 of file TFileMerger.h.

◆ GetPrintLevel()

Int_t TFileMerger::GetPrintLevel ( ) const

inline

Definition at line 87 of file TFileMerger.h.

◆ HasCompressionChange()

Bool_t TFileMerger::HasCompressionChange ( ) const

inline

Definition at line 89 of file TFileMerger.h.

◆ IsA()

TClass * TFileMerger::IsA ( ) const

inlineoverridevirtual

Returns: TClass describing current object

Reimplemented from TObject.

Definition at line 127 of file TFileMerger.h.

◆ Merge()

Bool_t TFileMerger::Merge ( Bool_t = kTRUE )

virtual

Merge the files.

If no output file was specified it will write into the file "FileMerger.root" in the working directory. Returns true on success, false in case of error.

Definition at line 373 of file TFileMerger.cxx.

◆ MergeOne()

Bool_t TFileMerger::MergeOne	(	TDirectory *	target,
		TList *	sourcelist,
		Int_t	type,
		TFileMergeInfo &	info,
		TString &	oldkeyname,
		THashList &	allNames,
		Bool_t &	status,
		Bool_t &	onlyListed,
		const TString &	path,
		TDirectory *	current_sourcedir,
		TFile *	current_file,
		TKey *	key,
		TObject *	obj,
		TIter &	nextkey
	)

protectedvirtual

Definition at line 441 of file TFileMerger.cxx.

◆ MergeRecursive()

Bool_t TFileMerger::MergeRecursive	(	TDirectory *	target,
		TList *	sourcelist,
		Int_t	type = `kRegular \| kAll`
	)

protectedvirtual

Merge all objects in a directory.

The type is defined by the bit values in TFileMerger::EPartialMergeType.

Definition at line 817 of file TFileMerger.cxx.

◆ OpenExcessFiles()

Bool_t TFileMerger::OpenExcessFiles ( )

protected

Open up to fMaxOpenedFiles of the excess files.

Definition at line 1040 of file TFileMerger.cxx.

◆ operator=()

TFileMerger & TFileMerger::operator= ( const TFileMerger & )

privatedelete

◆ OutputFile() [1/5]

Bool_t TFileMerger::OutputFile	(	const char *	url,
		Bool_t	force
	)

virtual

Open merger output file.

Definition at line 290 of file TFileMerger.cxx.

◆ OutputFile() [2/5]

Bool_t TFileMerger::OutputFile	(	const char *	url,
		Bool_t	force,
		Int_t	compressionLevel
	)

virtual

Open merger output file.

Definition at line 282 of file TFileMerger.cxx.

◆ OutputFile() [3/5]

Bool_t TFileMerger::OutputFile	(	const char *	outputfile,
		const char *	mode,
		Int_t	compressionLevel
	)

virtual

Open merger output file.

The 'mode' parameter is passed to the TFile constructor as the option, it should be one of 'NEW','CREATE','RECREATE','UPDATE' 'UPDATE' is usually used in conjunction with IncrementalMerge.

Definition at line 304 of file TFileMerger.cxx.

◆ OutputFile() [4/5]

Bool_t TFileMerger::OutputFile	(	const char *	outputfile,
		const char *	mode = `"RECREATE"`
	)

virtual

Open merger output file.

'mode' is passed to the TFile constructor as the option, it should be one of 'NEW','CREATE','RECREATE','UPDATE' 'UPDATE' is usually used in conjunction with IncrementalMerge.

Definition at line 350 of file TFileMerger.cxx.

◆ OutputFile() [5/5]

Bool_t TFileMerger::OutputFile ( std::unique_ptr< TFile > file )

virtual

Set an output file opened externally by the users.

Definition at line 318 of file TFileMerger.cxx.

◆ PartialMerge()

Bool_t TFileMerger::PartialMerge ( Int_t in_type = kAll | kIncremental )

virtual

Merge the files.

If no output file was specified it will write into the file "FileMerger.root" in the working directory. Returns true on success, false in case of error. The type is defined by the bit values in EPartialMergeType: kRegular : normal merge, overwritting the output file kIncremental : merge the input file with the content of the output file (if already exising) (default) kResetable : merge only the objects with a MergeAfterReset member function. kNonResetable : merge only the objects without a MergeAfterReset member function. kDelayWrite : delay the TFile write (to reduce the number of write when reusing the file) kAll : merge all type of objects (default) kAllIncremental : merge incrementally all type of objects. kOnlyListed : merge only the objects specified in fObjectNames list kSkipListed : skip objects specified in fObjectNames list kKeepCompression: keep compression level unchanged for each input

If the type is not set to kIncremental, the output file is deleted at the end of this operation.

Definition at line 926 of file TFileMerger.cxx.

◆ PrintFiles()

void TFileMerger::PrintFiles ( Option_t * options )

virtual

Print list of files being merged.

Definition at line 360 of file TFileMerger.cxx.

◆ RecursiveRemove()

void TFileMerger::RecursiveRemove ( TObject * obj )

overridevirtual

Intercept the case where the output TFile is deleted!

Reimplemented from TObject.

Definition at line 1087 of file TFileMerger.cxx.

◆ Reset()

void TFileMerger::Reset ( )

virtual

Reset merger file list.

Definition at line 119 of file TFileMerger.cxx.

◆ SetCWD()

virtual Bool_t TFileMerger::SetCWD ( const char * )

inlinevirtual

Definition at line 106 of file TFileMerger.h.

◆ SetFastMethod()

virtual void TFileMerger::SetFastMethod ( Bool_t fast = kTRUE )

inlinevirtual

Definition at line 122 of file TFileMerger.h.

◆ SetIOFeatures()

void TFileMerger::SetIOFeatures ( ROOT::TIOFeatures & features )

inline

Definition at line 100 of file TFileMerger.h.

◆ SetMaxOpenedFiles()

void TFileMerger::SetMaxOpenedFiles ( Int_t newmax )

Set a limit to the number of files that TFileMerger will open simultaneously.

If the request is higher than the system limit, we reset it to the system limit. If the request is less than two, we reset it to 2 (one for the output file and one for the input file).

Definition at line 1101 of file TFileMerger.cxx.

◆ SetMergeOptions() [1/2]

void TFileMerger::SetMergeOptions ( const std::string_view & options )

inline

Definition at line 99 of file TFileMerger.h.

◆ SetMergeOptions() [2/2]

void TFileMerger::SetMergeOptions ( const TString & options )

inline

Definition at line 98 of file TFileMerger.h.

◆ SetMsgPrefix()

void TFileMerger::SetMsgPrefix ( const char * prefix )

Set the prefix to be used when printing informational message.

Definition at line 1117 of file TFileMerger.cxx.

◆ SetNotrees()

virtual void TFileMerger::SetNotrees ( Bool_t notrees = kFALSE )

inlinevirtual

Definition at line 124 of file TFileMerger.h.

◆ SetPrintLevel()

void TFileMerger::SetPrintLevel ( Int_t level )

inline

Definition at line 88 of file TFileMerger.h.

◆ Streamer()

void TFileMerger::Streamer ( TBuffer & R__b )

overridevirtual

Stream an object of class TObject.

Reimplemented from TObject.

◆ StreamerNVirtual()

void TFileMerger::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 127 of file TFileMerger.h.

Member Data Documentation

◆ fCompressionChange

Bool_t TFileMerger::fCompressionChange {kFALSE}

protected

True if the output and input have different compression level (default kFALSE)

Definition at line 45 of file TFileMerger.h.

◆ fExcessFiles

TList TFileMerger::fExcessFiles

protected

! List of TObjString containing the name of the files not yet added to fFileList due to user or system limitation on the max number of files opened.

Definition at line 56 of file TFileMerger.h.

◆ fExplicitCompLevel

Bool_t TFileMerger::fExplicitCompLevel {kFALSE}

protected

True if the user explicitly requested a compression level change (default kFALSE)

Definition at line 44 of file TFileMerger.h.

◆ fFastMethod

Bool_t TFileMerger::fFastMethod {kTRUE}

protected

True if using Fast merging algorithm (default)

Definition at line 42 of file TFileMerger.h.

◆ fFileList

TList TFileMerger::fFileList

protected

A list the file (TFile*) which shall be merged.

Definition at line 39 of file TFileMerger.h.

◆ fHistoOneGo

Bool_t TFileMerger::fHistoOneGo

protected

Merger histos in one go (default is kTRUE)

Definition at line 53 of file TFileMerger.h.

◆ fIOFeatures

TIOFeatures* TFileMerger::fIOFeatures {nullptr}

protected

IO features to use in the output file.

Definition at line 48 of file TFileMerger.h.

◆ fLocal

Bool_t TFileMerger::fLocal

protected

Makes local copies of merging files if True (default is kTRUE)

Definition at line 52 of file TFileMerger.h.

◆ fMaxOpenedFiles

Int_t TFileMerger::fMaxOpenedFiles

protected

Maximum number of files opened at the same time by the TFileMerger.

Definition at line 51 of file TFileMerger.h.

◆ fMergeList

TList TFileMerger::fMergeList

protected

list of TObjString containing the name of the files need to be merged

Definition at line 55 of file TFileMerger.h.

◆ fMergeOptions

TString TFileMerger::fMergeOptions

protected

Options (in string format) to be passed down to the Merge functions.

Definition at line 47 of file TFileMerger.h.

◆ fMsgPrefix

TString TFileMerger::fMsgPrefix {"TFileMerger"}

protected

Prefix to be used when printing informational message (default TFileMerger)

Definition at line 49 of file TFileMerger.h.

◆ fNoTrees

Bool_t TFileMerger::fNoTrees {kFALSE}

protected

True if Trees should not be merged (default is kFALSE)

Definition at line 43 of file TFileMerger.h.

◆ fObjectNames

TString TFileMerger::fObjectNames

protected

List of object names to be either merged exclusively or skipped.

Definition at line 54 of file TFileMerger.h.

◆ fOutputFile

TFile* TFileMerger::fOutputFile {nullptr}

protected

The outputfile for merging.

Definition at line 40 of file TFileMerger.h.

◆ fOutputFilename

TString TFileMerger::fOutputFilename

protected

The name of the outputfile for merging.

Definition at line 41 of file TFileMerger.h.

◆ fPrintLevel

Int_t TFileMerger::fPrintLevel {0}

protected

How much information to print out at run time.

Definition at line 46 of file TFileMerger.h.

◆ fWatch

TStopwatch TFileMerger::fWatch

protected

Stop watch to measure file copy speed.

Definition at line 38 of file TFileMerger.h.

Libraries for TFileMerger:

[legend]

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

io/io/inc/TFileMerger.h
io/io/src/TFileMerger.cxx

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Private Types

Private Member Functions

Additional Inherited Members

Member Typedef Documentation

◆ TIOFeatures

Member Enumeration Documentation

◆ EPartialMergeType

Constructor & Destructor Documentation

◆ TFileMerger() [1/2]

◆ TFileMerger() [2/2]

◆ ~TFileMerger()

Member Function Documentation

◆ AddAdoptFile()

◆ AddFile() [1/3]

◆ AddFile() [2/3]

◆ AddFile() [3/3]

◆ AddObjectNames()

◆ Class()

◆ Class_Name()

◆ Class_Version()

◆ ClearObjectNames()

◆ DeclFileName()

◆ GetCWD()

◆ GetMaxOpenedFiles()

◆ GetMergeList()

◆ GetMergeOptions()

◆ GetMsgPrefix()

◆ GetNotrees()

◆ GetObjectNames()

◆ GetOutputFile()

◆ GetOutputFileName()

◆ GetPrintLevel()

◆ HasCompressionChange()

◆ IsA()

◆ Merge()

◆ MergeOne()

◆ MergeRecursive()

◆ OpenExcessFiles()

◆ operator=()

◆ OutputFile() [1/5]

◆ OutputFile() [2/5]

◆ OutputFile() [3/5]

◆ OutputFile() [4/5]

◆ OutputFile() [5/5]

◆ PartialMerge()

◆ PrintFiles()

◆ RecursiveRemove()

◆ Reset()

◆ SetCWD()

◆ SetFastMethod()

◆ SetIOFeatures()

◆ SetMaxOpenedFiles()

◆ SetMergeOptions() [1/2]

◆ SetMergeOptions() [2/2]

◆ SetMsgPrefix()

◆ SetNotrees()

◆ SetPrintLevel()

◆ Streamer()

◆ StreamerNVirtual()

Member Data Documentation

◆ fCompressionChange

◆ fExcessFiles

◆ fExplicitCompLevel

◆ fFastMethod

◆ fFileList

◆ fHistoOneGo

◆ fIOFeatures

◆ fLocal

◆ fMaxOpenedFiles

◆ fMergeList

◆ fMergeOptions

◆ fMsgPrefix

◆ fNoTrees

◆ fObjectNames

◆ fOutputFile