TMap implements an associative array of (key,value) pairs using a THashTable for efficient retrieval (therefore TMap does not conserve the order of the entries).

The hash value is calculated using the value returned by the keys Hash() function and the key comparison is done via the IsEqual() function. Both key and value must inherit from TObject.

Definition at line 40 of file TMap.h.

Public Types
typedef TMapIter	Iterator_t

Public Types inherited from TCollection
enum	{ kInitCapacity = 16, kInitHashTableCapacity = 17 }

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
	TMap (Int_t capacity=TCollection::kInitHashTableCapacity, Int_t rehash=0)
	TMap ctor. See THashTable for a description of the arguments. More...

virtual	~TMap ()
	TMap dtor. More...

void	Add (TObject *obj)
	This function may not be used (but we need to provide it since it is a pure virtual in TCollection). More...

void	Add (TObject key, TObject value)
	Add a (key,value) pair to the map. More...

Float_t	AverageCollisions () const
	Return the ratio of entries vs occupied slots. More...

Int_t	Capacity () const
	Return number of slots in the hashtable. More...

void	Clear (Option_t *option="")
	Remove all (key,value) pairs from the map. More...

Int_t	Collisions (const char *keyname) const
	Returns the number of collisions for a key with a certain name (i.e. More...

Int_t	Collisions (TObject *key) const
	Returns the number of collisions for a key (i.e. More...

void	Delete (Option_t *option="")
	Remove all (key,value) pairs from the map AND delete the keys when they are allocated on the heap. More...

void	DeleteAll ()
	Remove all (key,value) pairs from the map AND delete the keys AND values when they are allocated on the heap. More...

Bool_t	DeleteEntry (TObject *key)
	Remove (key,value) pair with key from the map. More...

void	DeleteKeys ()

void	DeleteValues ()
	Remove all (key,value) pairs from the map AND delete the values when they are allocated on the heap. More...

TObject *	FindObject (const char *keyname) const
	Check if a (key,value) pair exists with keyname as name of the key. More...

TObject *	FindObject (const TObject *key) const
	Check if a (key,value) pair exists with key as key. More...

TObject **	GetObjectRef (const TObject *obj) const

const THashTable *	GetTable () const

TObject *	GetValue (const char *keyname) const
	Returns a pointer to the value associated with keyname as name of the key. More...

TObject *	GetValue (const TObject *key) const
	Returns a pointer to the value associated with key. More...

Bool_t	IsOwnerValue () const

TIterator *	MakeIterator (Bool_t dir=kIterForward) const
	Create an iterator for TMap. More...

TObject *	operator() (const char *keyname) const

TObject *	operator() (const TObject *key) const

void	Rehash (Int_t newCapacity, Bool_t checkObjValidity=kTRUE)
	Rehash the underlaying THashTable (see THashTable::Rehash()). More...

TObject *	Remove (TObject *key)
	Remove the (key,value) pair with key from the map. More...

TPair *	RemoveEntry (TObject *key)
	Remove (key,value) pair with key from the map. More...

virtual void	SetOwnerKeyValue (Bool_t ownkeys=kTRUE, Bool_t ownvals=kTRUE)
	Set ownership for keys and values. More...

virtual void	SetOwnerValue (Bool_t enable=kTRUE)
	Set whether this map is the owner (enable==true) of its values. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write all objects in this map. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write all objects in this map. More...

Public Member Functions inherited from TCollection
virtual	~TCollection ()
	TNamed destructor. More...

virtual void	AddAll (const TCollection *col)
	Add all objects from collection col to this collection. More...

void	AddVector (TObject *obj1,...)
	Add all arguments to the collection. More...

Bool_t	AssertClass (TClass *cl) const
	Make sure all objects in this collection inherit from class cl. More...

TIter	begin () const

void	Browse (TBrowser *b)
	Browse this collection (called by TBrowser). More...

Int_t	Capacity () const

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

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

Bool_t	Contains (const char *name) const

Bool_t	Contains (const TObject *obj) const

virtual void	Draw (Option_t *option="")
	Draw all objects in this collection. More...

virtual void	Dump () const
	Dump all objects in this collection. More...

TIter	end () const

virtual Int_t	GetEntries () const

virtual const char *	GetName () const
	Return name of this collection. More...

virtual Int_t	GetSize () const

virtual Int_t	GrowBy (Int_t delta) const
	Increase the collection's capacity by delta slots. More...

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

Bool_t	IsArgNull (const char where, const TObject obj) const
	Returns true if object is a null pointer. More...

virtual Bool_t	IsEmpty () const

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

Bool_t	IsOwner () const

Bool_t	IsSortable () const

R__ALWAYS_INLINE Bool_t	IsUsingRWLock () const

virtual void	ls (Option_t *option="") const
	List (ls) all objects in this collection. More...

virtual TIterator *	MakeReverseIterator () const

virtual Bool_t	Notify ()
	'Notify' all objects in this collection. More...

TObject *	operator() (const char *name) const
	Find an object in this collection by name. More...

virtual void	Paint (Option_t *option="")
	Paint all objects in this collection. More...

virtual void	Print (Option_t *option="") const
	Default print for collections, calls Print(option, 1). More...

virtual void	Print (Option_t *option, Int_t recurse) const
	Print the collection header and its elements. More...

virtual void	Print (Option_t option, const char wildcard, Int_t recurse=1) const
	Print the collection header and its elements that match the wildcard. More...

virtual void	Print (Option_t *option, TPRegexp &regexp, Int_t recurse=1) const
	Print the collection header and its elements that match the regexp. More...

virtual void	RecursiveRemove (TObject *obj)
	Remove object from this collection and recursively remove the object from all other objects (and collections). More...

virtual void	RemoveAll (TCollection *col)
	Remove all objects in collection col from this collection. More...

void	RemoveAll ()

void	SetCurrentCollection ()
	Set this collection to be the globally accesible collection. More...

void	SetName (const char *name)

virtual void	SetOwner (Bool_t enable=kTRUE)
	Set whether this collection is the owner (enable==true) of its content. More...

virtual bool	UseRWLock ()
	Set this collection to use a RW lock upon access, making it thread safe. 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...

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	Copy (TObject &object) const
	Copy this to obj. More...

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

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

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

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...

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...

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...

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...

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. 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...

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...

Protected Types
enum	EStatusBits { kIsOwnerValue = BIT(15) }

Protected Types inherited from TCollection
enum	EStatusBits { kIsOwner = BIT(14), kUseRWLock = BIT(16) }

Protected Member Functions
virtual void	PrintCollectionEntry (TObject entry, Option_t option, Int_t recurse) const
	Print the collection entry. More...

Protected Member Functions inherited from TCollection
	TCollection ()

virtual const char *	GetCollectionEntryName (TObject *entry) const
	For given collection entry return the string that is used to identify the object and, potentially, perform wildcard/regexp filtering on. More...

virtual void	PrintCollectionHeader (Option_t *option) const
	Print the collection header. 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 ()

Private Member Functions
	TMap (const TMap &map)

TMap &	operator= (const TMap &map)

Private Attributes
THashTable *	fTable

Friends
class	TMapIter

Additional Inherited Members
Static Public Member Functions inherited from TCollection
static void	EmptyGarbageCollection ()
	Do the garbage collection. More...

static void	GarbageCollect (TObject *obj)
	Add to the list of things to be cleaned up. More...

static TCollection *	GetCurrentCollection ()
	Return the globally accessible collection. More...

static void	StartGarbageCollection ()
	Set up for garbage collection. 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 Attributes inherited from TCollection
TString	fName

Int_t	fSize

#include <TMap.h>

Inheritance diagram for TMap:

[legend]

Member Typedef Documentation

◆ Iterator_t

typedef TMapIter TMap::Iterator_t

Definition at line 56 of file TMap.h.

Member Enumeration Documentation

◆ EStatusBits

enum TMap::EStatusBits

protected

Enumerator
kIsOwnerValue

Definition at line 51 of file TMap.h.

Constructor & Destructor Documentation

◆ TMap() [1/2]

TMap::TMap ( const TMap & map )

private

◆ TMap() [2/2]

TMap::TMap	(	Int_t	capacity = `TCollection::kInitHashTableCapacity`,
		Int_t	rehash = `0`
	)

TMap ctor. See THashTable for a description of the arguments.

Definition at line 33 of file TMap.cxx.

◆ ~TMap()

TMap::~TMap ( )

virtual

TMap dtor.

Objects are not deleted unless the TMap is the owner (set via SetOwner()).

Definition at line 43 of file TMap.cxx.

Member Function Documentation

◆ Add() [1/2]

void TMap::Add ( TObject * obj )

virtual

This function may not be used (but we need to provide it since it is a pure virtual in TCollection).

Use Add(key,value) instead.

Implements TCollection.

Definition at line 53 of file TMap.cxx.

◆ Add() [2/2]

void TMap::Add	(	TObject *	key,
		TObject *	value
	)

Add a (key,value) pair to the map.

Definition at line 61 of file TMap.cxx.

◆ AverageCollisions()

Float_t TMap::AverageCollisions ( ) const

Return the ratio of entries vs occupied slots.

Definition at line 72 of file TMap.cxx.

◆ Capacity()

Int_t TMap::Capacity ( ) const

Return number of slots in the hashtable.

Use GetSize() to get the number of objects stored in the TMap.

Definition at line 81 of file TMap.cxx.

◆ Clear()

void TMap::Clear ( Option_t * option = "" )

virtual

Remove all (key,value) pairs from the map.

The keys/values are deleted depending on the state of key-ownership (SetOwner()) and value-ownership (SetOwnerValue()).

To delete these objects regardless of the ownership state use:

Delete() to delete only keys;
DeleteValues() to delete only values;
DeleteAll() to delete both keys and values.

Implements TCollection.

Definition at line 96 of file TMap.cxx.

◆ Collisions() [1/2]

Int_t TMap::Collisions ( const char * keyname ) const

Returns the number of collisions for a key with a certain name (i.e.

number of objects in same slot in the hash table, i.e. length of linked list).

Definition at line 115 of file TMap.cxx.

◆ Collisions() [2/2]

Int_t TMap::Collisions ( TObject * key ) const

Returns the number of collisions for a key (i.e.

number of objects in same slot in the hash table, i.e. length of linked list).

Definition at line 124 of file TMap.cxx.

◆ Delete()

void TMap::Delete ( Option_t * option = "" )

virtual

Remove all (key,value) pairs from the map AND delete the keys when they are allocated on the heap.

Implements TCollection.

Definition at line 133 of file TMap.cxx.

◆ DeleteAll()

void TMap::DeleteAll ( )

Remove all (key,value) pairs from the map AND delete the keys AND values when they are allocated on the heap.

Definition at line 167 of file TMap.cxx.

◆ DeleteEntry()

Bool_t TMap::DeleteEntry ( TObject * key )

Remove (key,value) pair with key from the map.

Returns true if the key was found and removed, false otherwise. The key and value objects are deleted if map is the owner of keys and values respectively.

Definition at line 189 of file TMap.cxx.

◆ DeleteKeys()

void TMap::DeleteKeys ( )

inline

Definition at line 68 of file TMap.h.

◆ DeleteValues()

void TMap::DeleteValues ( )

Remove all (key,value) pairs from the map AND delete the values when they are allocated on the heap.

Definition at line 150 of file TMap.cxx.

◆ FindObject() [1/2]

TObject * TMap::FindObject ( const char * keyname ) const

virtual

Check if a (key,value) pair exists with keyname as name of the key.

Returns a TPair* (need to downcast from TObject). Use Key() and Value() to get the pointers to the key and value, respectively. Returns 0 if not found.

Reimplemented from TCollection.

Definition at line 214 of file TMap.cxx.

◆ FindObject() [2/2]

TObject * TMap::FindObject ( const TObject * key ) const

virtual

Check if a (key,value) pair exists with key as key.

Returns a TPair* (need to downcast from TObject). Use Key() and Value() to get the pointers to the key and value, respectively. Returns 0 if not found.

Reimplemented from TCollection.

Definition at line 225 of file TMap.cxx.

◆ GetObjectRef()

TObject** TMap::GetObjectRef ( const TObject * obj ) const

inlinevirtual

Implements TCollection.

Definition at line 74 of file TMap.h.

◆ GetTable()

const THashTable* TMap::GetTable ( ) const

inline

Definition at line 75 of file TMap.h.

◆ GetValue() [1/2]

TObject * TMap::GetValue ( const char * keyname ) const

Returns a pointer to the value associated with keyname as name of the key.

Definition at line 235 of file TMap.cxx.

◆ GetValue() [2/2]

TObject * TMap::GetValue ( const TObject * key ) const

Returns a pointer to the value associated with key.

Definition at line 245 of file TMap.cxx.

◆ IsOwnerValue()

Bool_t TMap::IsOwnerValue ( ) const

inline

Definition at line 78 of file TMap.h.

◆ MakeIterator()

TIterator * TMap::MakeIterator ( Bool_t dir = kIterForward ) const

virtual

Create an iterator for TMap.

Implements TCollection.

Definition at line 257 of file TMap.cxx.

◆ operator()() [1/2]

TObject* TMap::operator() ( const char * keyname ) const

inline

Definition at line 79 of file TMap.h.

◆ operator()() [2/2]

TObject* TMap::operator() ( const TObject * key ) const

inline

Definition at line 80 of file TMap.h.

◆ operator=()

TMap& TMap::operator= ( const TMap & map )

private

◆ PrintCollectionEntry()

void TMap::PrintCollectionEntry	(	TObject *	entry,
		Option_t *	option,
		Int_t	recurse
	)		const

protectedvirtual

Print the collection entry.

Reimplemented from TCollection.

Definition at line 265 of file TMap.cxx.

◆ Rehash()

void TMap::Rehash	(	Int_t	newCapacity,
		Bool_t	checkObjValidity = `kTRUE`
	)

Rehash the underlaying THashTable (see THashTable::Rehash()).

Definition at line 285 of file TMap.cxx.

◆ Remove()

TObject * TMap::Remove ( TObject * key )

virtual

Remove the (key,value) pair with key from the map.

Returns the key object or 0 in case key was not found. If map is the owner of values, the value is deleted.

Implements TCollection.

Definition at line 295 of file TMap.cxx.

◆ RemoveEntry()

TPair * TMap::RemoveEntry ( TObject * key )

Remove (key,value) pair with key from the map.

Returns the pair object or 0 in case the key was not found. It is caller's responsibility to delete the pair and, eventually, the key and value objects.

Definition at line 319 of file TMap.cxx.

◆ SetOwnerKeyValue()

void TMap::SetOwnerKeyValue	(	Bool_t	ownkeys = `kTRUE`,
		Bool_t	ownvals = `kTRUE`
	)

virtual

Set ownership for keys and values.

Definition at line 351 of file TMap.cxx.

◆ SetOwnerValue()

void TMap::SetOwnerValue ( Bool_t enable = kTRUE )

virtual

Set whether this map is the owner (enable==true) of its values.

If it is the owner of its contents, these objects will be deleted whenever the collection itself is deleted. The objects might also be deleted or destructed when Clear is called (depending on the collection).

Definition at line 340 of file TMap.cxx.

◆ Write() [1/2]

Int_t TMap::Write	(	const char *	name = `0`,
		Int_t	option = `0`,
		Int_t	bsize = `0`
	)

virtual

Write all objects in this map.

By default all objects in the collection are written individually (each object gets its own key). Note, this is recursive, i.e. objects in collections in the collection are also written individually. To write all objects using a single key specify a name and set option to TObject::kSingleKey (i.e. 1).

Reimplemented from TCollection.

Definition at line 431 of file TMap.cxx.

◆ Write() [2/2]

Int_t TMap::Write	(	const char *	name = `0`,
		Int_t	option = `0`,
		Int_t	bsize = `0`
	)		const

virtual

Write all objects in this map.

By default all objects in the collection are written individually (each object gets its own key). Note, this is recursive, i.e. objects in collections in the collection are also written individually. To write all objects using a single key specify a name and set option to TObject::kSingleKey (i.e. 1).

Reimplemented from TCollection.

Definition at line 404 of file TMap.cxx.

Friends And Related Function Documentation

◆ TMapIter

friend class TMapIter

friend

Definition at line 42 of file TMap.h.

Member Data Documentation

◆ fTable

THashTable* TMap::fTable

private

Definition at line 45 of file TMap.h.

Libraries for TMap:

[legend]

Public Types

Public Member Functions

Protected Types

Protected Member Functions

Private Member Functions

Private Attributes

Friends

Additional Inherited Members

Member Typedef Documentation

◆ Iterator_t

Member Enumeration Documentation

◆ EStatusBits

Constructor & Destructor Documentation

◆ TMap() [1/2]

◆ TMap() [2/2]

◆ ~TMap()

Member Function Documentation

◆ Add() [1/2]

◆ Add() [2/2]

◆ AverageCollisions()

◆ Capacity()

◆ Clear()

◆ Collisions() [1/2]

◆ Collisions() [2/2]

◆ Delete()

◆ DeleteAll()

◆ DeleteEntry()

◆ DeleteKeys()

◆ DeleteValues()

◆ FindObject() [1/2]

◆ FindObject() [2/2]

◆ GetObjectRef()

◆ GetTable()

◆ GetValue() [1/2]

◆ GetValue() [2/2]

◆ IsOwnerValue()

◆ MakeIterator()

◆ operator()() [1/2]

◆ operator()() [2/2]

◆ operator=()

◆ PrintCollectionEntry()

◆ Rehash()

◆ Remove()

◆ RemoveEntry()

◆ SetOwnerKeyValue()

◆ SetOwnerValue()

◆ Write() [1/2]

◆ Write() [2/2]

Friends And Related Function Documentation

◆ TMapIter

Member Data Documentation

◆ fTable