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 .