TClass
class description - source file - inheritance tree
private:
TMethod* GetClassMethod(Long_t faddr)
public:
TClass TClass()
TClass TClass(const char* name)
TClass TClass(const char* name, Version_t cversion, const char* dfil = 0, const char* ifil = 0, Int_t dl = 0, Int_t il = 0)
TClass TClass(TClass&)
virtual void ~TClass()
void AddInstance(Bool_t heap = kFALSE)
virtual void Browse(TBrowser* b)
void BuildRealData(void* pointer = 0)
void BypassStreamer(Bool_t bypass = kTRUE)
Bool_t CanBypassStreamer()
Bool_t CanIgnoreTObjectStreamer()
static TClass* Class()
virtual Int_t Compare(const TObject* obj) const
void Destructor(void* obj, Bool_t dtorOnly = kFALSE)
virtual void Draw(Option_t* option)
void* DynamicCast(const TClass* base, void* obj, Bool_t up = kTRUE)
char* EscapeChars(char* text) const
TClass* GetBaseClass(const char* classname)
TClass* GetBaseClass(const TClass* base)
Int_t GetBaseClassOffset(const TClass* base)
TClass* GetBaseDataMember(const char* datamember)
UInt_t GetCheckSum() const
G__ClassInfo* GetClassInfo() const
Version_t GetClassVersion() const
TDataMember* GetDataMember(const char* datamember)
Short_t GetDeclFileLine() const
const char* GetDeclFileName() const
UInt_t GetHeapInstanceCount() const
Short_t GetImplFileLine() const
const char* GetImplFileName() const
UInt_t GetInstanceCount() const
TList* GetListOfAllPublicDataMembers()
TList* GetListOfAllPublicMethods()
TList* GetListOfBases()
TList* GetListOfDataMembers()
TList* GetListOfMethods()
TList* GetListOfRealData() const
void GetMenuItems(TList* listitems)
TMethod* GetMethod(const char* method, const char* params)
TMethod* GetMethodAny(const char* method)
TMethod* GetMethodWithPrototype(const char* method, const char* proto)
virtual const char* GetName() const
Int_t GetNdata()
Int_t GetNmethods()
TStreamerInfo* GetStreamerInfo(Int_t version = 0)
TObjArray* GetStreamerInfos() const
virtual const char* GetTitle() const
virtual ULong_t Hash() const
void IgnoreTObjectStreamer(Bool_t ignore = kTRUE)
virtual Bool_t InheritsFrom(const char* cl) const
virtual Bool_t InheritsFrom(const TClass* cl) const
virtual TClass* IsA() const
static Bool_t IsCallingNew()
virtual Bool_t IsFolder() const
static TClass* Load(TBuffer& b)
void* New(Bool_t defConstructor = kTRUE)
virtual Long_t Property() const
Int_t ReadBuffer(TBuffer& b, void* pointer, Int_t version, UInt_t start, UInt_t count)
Int_t ReadBuffer(TBuffer& b, void* pointer)
void ResetInstanceCount()
void SetStreamer(const char* name, Streamer_t p)
TStreamerInfo* SetStreamerInfo(Int_t version, const char* info)
virtual void ShowMembers(TMemberInspector& insp, char* parent)
Int_t Size() const
void Store(TBuffer& b) const
virtual void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
Int_t WriteBuffer(TBuffer& b, void* pointer, const char* info)
private:
TString fName name of class
TObjArray* fStreamerInfo Array of TStreamerInfo
TList* fRealData linked list for persistent members including base classes
TList* fBase linked list for base classes
TList* fData linked list for data members
TList* fMethod linked list for methods
TList* fAllPubData all public data members (including from base classes)
TList* fAllPubMethod all public methods (including from base classes)
const char* fDeclFileName name of class declaration file
const char* fImplFileName name of class implementation file
Short_t fDeclFileLine line of class declaration
Short_t fImplFileLine line of class implementation
UInt_t fInstanceCount number of instances of this class
UInt_t fOnHeap number of instances on heap
UInt_t fCheckSum checksum of data members and base classes
Version_t fClassVersion Class version Identifier
G__ClassInfo* fClassInfo pointer to CINT class info class
static Bool_t fgCallingNew True when TClass:New is executing
static Int_t fgClassCount provides unique id for a each class
public:
static const enum TObject:: kClassSaved
static const enum TObject:: kIgnoreTObjectStreamer
static const enum TObject:: kBypassStreamer
See also
-
TQClass
The ROOT global object gROOT contains a list of all defined
classes. This list is build when a reference to a class dictionary
is made. When this happens, the static "class"::Dictionary()
function is called to create a TClass object describing the
class. The Dictionary() function is defined in the ClassDef
macro and stored (at program startup or library load time) together
with the class name in the TClassTable singleton object.
For a description of all dictionary classes see TDictionary.
TClass() : TDictionary()
Default ctor.
TClass(const char *name) : TDictionary()
Create a TClass object. This object contains the full dictionary
of a class. It has list to baseclasses, datamembers and methods.
Use this ctor to create a standalone TClass object. Most useful
to get a TClass interface to an interpreted class. Used by TTabCom.
Normally you would use gROOT->GetClass("class") to get access to a
TClass object for a certain class.
TClass(const char *name, Version_t cversion,
const char *dfil, const char *ifil, Int_t dl, Int_t il)
: TDictionary()
Create a TClass object. This object contains the full dictionary
of a class. It has list to baseclasses, datamembers and methods.
~TClass()
TClass dtor. Deletes all list that might have been created.
void Browse(TBrowser *b)
This method is called by a browser to get the class information.
void BuildRealData(void *pointer)
Build a full list of persistent data members.
Scans the list of all data members in the class itself and also
in all base classes. For each persistent data member, inserts a
TRealData object in the list fRealData.
if pointer is NULL, uses the object at pointer
otherwise creates a temporary object object of this class
void BypassStreamer(Bool_t bypass)
When the class kBypassStreamer bit is set, the automatically
generated Streamer can call directly TClass::WriteBuffer
This option can be set for critical classes in collections.
It saves a non negligible overhead in time at the expense of losing
the control for additional operations in the Streamer function.
Int_t Compare(const TObject *obj) const
Compare to other object. Returns 0<, 0 or >0 depending on
whether "this" is lexicographically less than, equal to, or
greater than obj.
void Draw(Option_t *option)
Draw detailed class inheritance structure.
If a class B inherits from a class A, the description of B is drawn
on the right side of the description of A.
Member functions overridden by B are shown in class A with a blue line
erasing the corresponding member function
char* EscapeChars(char *text) const
Introduce an escape character (@) in front of a special chars.
You need to use the result immediately before it is being overwritten.
TClass* GetBaseClass(const char *classname)
Return pointer to the base class "classname". Returns 0 in case
"classname" is not a base class. Takes care of multiple inheritance.
TClass* GetBaseClass(const TClass *cl)
Return pointer to the base class "cl". Returns 0 in case "cl"
is not a base class. Takes care of multiple inheritance.
Int_t GetBaseClassOffset(const TClass *cl)
Return data member offset to the base class "cl".
Returns -1 in case "cl" is not a base class.
Takes care of multiple inheritance.
TClass* GetBaseDataMember(const char *datamember)
Return pointer to (base) class that contains datamember.
TDataMember* GetDataMember(const char *datamember)
Return pointer to datamember object with name "datamember".
TList* GetListOfBases()
Return list containing the TBaseClass(es) of a class.
TList* GetListOfDataMembers()
Return list containing the TDataMembers of a class.
TList* GetListOfMethods()
Return list containing the TMethods of a class.
TList* GetListOfAllPublicMethods()
Returns a list of all public methods of this class and its base classes.
Refers to a subset of the methods in GetListOfMethods() so don't do
GetListOfAllPublicMethods()->Delete().
Algorithm used to get the list is:
- put all methods of the class in the list (also protected and private
ones).
- loop over all base classes and add only those methods not already in the
list (also protected and private ones).
- once finished, loop over resulting list and remove all private and
protected methods.
TList* GetListOfAllPublicDataMembers()
Returns a list of all public data members of this class and its base
classes. Refers to a subset of the data members in GetListOfDatamembers()
so don't do GetListOfAllPublicDataMembers()->Delete().
void GetMenuItems(TList *list)
Returns list of methods accessible by context menu.
TMethod* GetMethodAny(const char *method)
Return pointer to method without looking at parameters.
Does not look in (possible) base classes.
TMethod* GetMethod(const char *method, const char *params)
Find the best method (if there is one) matching the parameters.
The params string must contain argument values, like "3189, "aap", 1.3".
The function invokes GetClassMethod to search for a possible method
in the class itself or in its base classes. Returns 0 in case method
is not found.
TMethod* GetMethodWithPrototype(const char *method, const char *proto)
Find the method with a given prototype. The proto string must be of the
form: "char*,int,double". Returns 0 in case method is not found.
TMethod* GetClassMethod(Long_t faddr)
Look for a method in this class that has the interface function
address faddr.
const char* GetTitle() const
Return the description of the class.
Int_t GetNdata()
Return the number of data members of this class
Note that in case the list of data members is not yet created, it will be done
by GetListOfDataMembers().
Int_t GetNmethods()
Return the number of methods of this class
Note that in case the list of methods is not yet created, it will be done
by GetListOfMethods().
TStreamerInfo* GetStreamerInfo(Int_t version)
returns a pointer to the TStreamerInfo object for version
If the object doest not exist, it is created
void IgnoreTObjectStreamer(Bool_t ignore)
When the class kIgnoreTObjectStreamer bit is set, the automatically
generated Streamer will not call TObject::Streamer.
This option saves the TObject space overhead on the file.
However, the information (fBits, fUniqueID) of TObject is lost.
Bool_t InheritsFrom(const char *classname) const
Return kTRUE if this class inherits from a class with name "classname".
Bool_t InheritsFrom(const TClass *cl) const
Return kTRUE if this class inherits from class cl.
void* DynamicCast(const TClass *cl, void *obj, Bool_t up)
Cast obj of this class type up to baseclass cl if up is true.
Cast obj of this class type down from baseclass cl if up is false.
If this class is not a baseclass of cl return 0, else the pointer
to the cl part of this (up) or to this (down).
void* New(Bool_t defConstructor)
Return a pointer to a newly allocated object of this class.
The class must have a default constructor.
void Destructor(void *obj, Bool_t dtorOnly)
Explicitely call destructor for object.
Int_t Size() const
Return size of object of this class.
Long_t Property() const
Get property description word. For meaning of bits see EProperty.
TClass* Load(TBuffer &b)
Load class description from I/O buffer and return class object.
void Store(TBuffer &b) const
Store class description on I/O buffer.
Bool_t IsCallingNew()
Static method returning the defConstructor flag passed to TClass::New().
This function cannot be inline (problems with NT linker).
TStreamerInfo* SetStreamerInfo(Int_t version, const char *info)
Info is a string describing the names and types of attributes
written by the class Streamer function.
If info is an empty string (when called by TObject::StreamerInfo)
the default Streamer info string is build. This corresponds to
the case of an automatically generated Streamer.
In case of user defined Streamer function, it is the user responsability
to implement a StreamerInfo function (override TObject::StreamerInfo).
The user must call IsA()->SetStreamerInfo(info) from this function.
UInt_t GetCheckSum() const
Compute and/or return the class check sum.
The class ckecksum is used by the automatic schema evolution algorithm
to uniquely identify a class version.
The check sum is built from the names/types of base classes and
data members
Algorithm from Victor Perevovchikov (perev@bnl.gov)
void SetStreamer(const char *name, Streamer_t p)
store pointer to function to Stream non basic member name
Int_t ReadBuffer(TBuffer &b, void *pointer, Int_t version, UInt_t start, UInt_t count)
function called by the Streamer functions to deserialize information
from buffer b into object at p.
This function assumes that the class version and the byte count information
have been read.
version is the version number of the class
start is the starting position in the buffer b
count is the number of bytes for this object in the buffer
Int_t ReadBuffer(TBuffer &b, void *pointer)
function called by the Streamer functions to deserialize information
from buffer b into object at p
Int_t WriteBuffer(TBuffer &b, void *pointer, const char *info)
function called by the Streamer functions to serialize object at p
to buffer b. The optional argument info may be specified to give an
alternative StreamerInfo instead of using the default StreamerInfo
automatically built from the class definition.
For more information, see class TStreamerInfo.
Inline Functions
void AddInstance(Bool_t heap = kFALSE)
Bool_t CanBypassStreamer()
Bool_t CanIgnoreTObjectStreamer()
Version_t GetClassVersion() const
const char* GetDeclFileName() const
Short_t GetDeclFileLine() const
G__ClassInfo* GetClassInfo() const
TList* GetListOfRealData() const
const char* GetName() const
const char* GetImplFileName() const
Short_t GetImplFileLine() const
UInt_t GetInstanceCount() const
UInt_t GetHeapInstanceCount() const
TObjArray* GetStreamerInfos() const
ULong_t Hash() const
Bool_t IsFolder() const
void ResetInstanceCount()
TClass* Class()
TClass* IsA() const
void ShowMembers(TMemberInspector& insp, char* parent)
void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
TClass TClass(TClass&)
Author: Rene Brun 07/01/95
Last update: root/meta:$Name: $:$Id: TClass.cxx,v 1.22 2000/12/20 17:36:18 rdm Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
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