TObject

[Properties (by Name)][Methods (by Name)][Events (by Name)]

Base class of all classes.

Declaration

Source position: objpash.inc line 203

Type
  TObject = class
  public
    constructor Create;
    destructor Destroy;  Virtual;
    class function newinstance : TObject;  Virtual;
    procedure FreeInstance;  Virtual;
    function SafeCallException(exceptobject: TObject; 
                              exceptaddr: CodePointer) : HRESULT;  Virtual;
    procedure DefaultHandler(var message);  Virtual;
    procedure Free;
    class function InitInstance(instance: pointer) : TObject;
    procedure CleanupInstance;
    class function ClassType : TClass;
    class function ClassInfo : pointer;
    class function ClassName : shortstring;
    class function ClassNameIs(const name: string) : Boolean;
    class function ClassParent : TClass;
    class function InstanceSize : SizeInt;
    class function InheritsFrom(aclass: TClass) : Boolean;
    class function StringMessageTable : pstringmessagetable;
    class function MethodAddress(const name: shortstring) : CodePointer;
    class function MethodName(address: CodePointer) : shortstring;
    function FieldAddress(const name: shortstring) : pointer;
    procedure AfterConstruction;  Virtual;
    procedure BeforeDestruction;  Virtual;
    procedure DefaultHandlerStr(var message);  Virtual;
    procedure Dispatch(var message);  Virtual;
    procedure DispatchStr(var message);  Virtual;
    function GetInterface(const iid: TGuid; out obj) : Boolean;
    function GetInterface(const iidstr: shortstring; out obj) : Boolean;
    function GetInterfaceByStr(const iidstr: shortstring; out obj) : Boolean;
    function GetInterfaceWeak(const iid: TGuid; out obj) : Boolean;
    class function GetInterfaceEntry(const iid: TGuid) : pinterfaceentry;
    class function GetInterfaceEntryByStr(const iidstr: shortstring)
                                          : pinterfaceentry;
    class function GetInterfaceTable : pinterfacetable;
    class function UnitName : ansistring;
    class function QualifiedClassName : ansistring;
    function Equals(Obj: TObject) : Boolean;  Virtual;
    function GetHashCode : PtrInt;  Virtual;
    function ToString : ansistring;  Virtual;
  end
  ;

Description

TObject is the parent root class for all classes in Object Pascal. If a class has no parent class explicitly declared, it is dependent on TObject. TObject introduces class methods that deal with the class' type information, and contains all necessary methods to create an instance at runtime, and to dispatch messages to the correct method (both string and integer messages).

Members

Member	Type	Visibility	Description
AfterConstruction	Method	public	Method called after the constructor was called.
BeforeDestruction	Method	public	Method called before the destructor is called.
ClassInfo	Method	public	Return a pointer to the type information for this class.
ClassName	Method	public	Return the current class name.
ClassNameIs	Method	public	Check whether the class name equals the given name.
ClassParent	Method	public	Return the parent class.
ClassType	Method	public	Return a "class of" pointer for the current class
CleanupInstance	Method	public	Finalize the class instance.
Create	Method	public	TObject Constructor
DefaultHandler	Method	public	Default handler for integer message handlers.
DefaultHandlerStr	Method	public	Default handler for string messages.
Destroy	Method	public	TObject destructor.
Dispatch	Method	public	Dispatch an integer message
DispatchStr	Method	public	Dispatch a string message.
Equals	Method	public	Check if two objects are equal.
FieldAddress	Method	public	Return the address of a field.
Free	Method	public	Check for Nil and call destructor.
FreeInstance	Method	public	Clean up instance and free the memory reserved for the instance.
GetHashCode	Method	public	Return a hash code for the object
GetInterface	Method	public	Return a reference to an interface
GetInterfaceByStr	Method	public	Return an interface based on its GUID
GetInterfaceEntry	Method	public	Return the interface table entry by GUID
GetInterfaceEntryByStr	Method	public	Return the interface table entry by string
GetInterfaceTable	Method	public	Return a pointer to the table of implemented interfaces for a class
GetInterfaceWeak	Method	public	Get a reference to an interface, not increasing the reference count
InheritsFrom	Method	public	Check whether class is an ancestor.
InitInstance	Method	public	Initialize a new class instance.
InstanceSize	Method	public	Return the size of an instance.
MethodAddress	Method	public	Return the address of a method
MethodName	Method	public	Return the name of a method.
newinstance	Method	public	Allocate memory on the heap for a new instance
QualifiedClassName	Method	public	Fully qualified classname
SafeCallException	Method	public	Handle exception object
StringMessageTable	Method	public	Return a pointer to the string message table.
ToString	Method	public	Return a string representation for the object
UnitName	Method	public	Unit name

Inheritance

Class	Description
TObject	Base class of all classes.

See also

Name	Description
TClass	Class of TObject .