TBinaryObjectReader¶

Driver class descendant which reads component data stored in binary format.

Declaration¶

Source position: classesh.inc line 1891

type

  TBinaryObjectReader = class(TAbstractObjectReader)
  public
    TBOVersion = (boVersion0,boVersion1);
  public
    const
      UnitnameSeparator = '/';
      DelphiDoubleValue = 21;
    constructor Create;
    destructor Destroy;
    function NextValue : TValueType;
    function ReadValue : TValueType;
    procedure ReadPrefix;
    procedure BeginRootComponent;
    procedure BeginComponent(var Flags: TFilerFlags; 
                        var AChildPos: Integer; 
                        var CompClassName: string; var CompName: string); overload;
    procedure BeginComponent(var Flags: TFilerFlags; 
                        var AChildPos: Integer; 
                        var CompUnitName: string; 
                        var CompClassName: string; var CompName: string); overload;
    function BeginProperty : string;
    procedure Read;
    procedure ReadBinary;
    function ReadFloat : Extended;
    function ReadSingle : Single;
    function ReadDouble : Double;
    function ReadDate : TDateTime;
    function ReadCurrency : Currency;
    function ReadIdent : RawByteString;
    function ReadInt8 : ShortInt;
    function ReadInt16 : SmallInt;
    function ReadInt32 : LongInt;
    function ReadInt64 : Int64;
    function ReadSet : Integer;
    procedure ReadSignature;
    function ReadStr : RawByteString;
    function ReadString : RawByteString;
    function ReadWideString : WideString;
    function ReadUnicodeString : UnicodeString;
    procedure SkipComponent;
    procedure SkipValue;
    property Version: TBOVersion; {r}
    property DelphiCompatible: Boolean; {rw}
  end;

Inheritance¶

Description¶

The TBinaryObjectReader class reads component data stored in binary form in a file. For this, it overrides or implements all abstract methods from TAbstractObjectReader. No new functionality is added by this class, it is a driver class for the streaming system.

It should never be necessary to create an instance of this class directly. Instead, the TStream.WriteComponent call should be used.

Properties¶

Member	Visibility	Description
DelphiCompatible	public
Version read only	public

See all Properties

Methods¶

Member	Visibility	Description
BeginComponent	public	Start reading a component.
BeginProperty	public	Start reading a property.
BeginRootComponent	public	Start reading the root component.
Create	public	Creates a new binary data reader instance.
Destroy	public	Destroys the binary data reader.
NextValue	public	Return the type of the next value.
Read	public	Read raw data from stream.
ReadBinary	public	Start reading a binary value.
ReadCurrency	public	Read a currency value from the stream.
ReadDate	public	Read a date.
ReadDouble	public
ReadFloat	public	Read a float value.
ReadIdent	public	Read an identifier.
ReadInt16	public	Read a 16-bits integer.
ReadInt32	public	Read a 32-bits integer.
ReadInt64	public	Read a 64-bits integer.
ReadInt8	public	Read an 8-bits integer.
ReadPrefix	public
ReadSet	public	Read a set.
ReadSignature	public	Reads the filer signature.
ReadSingle	public	Read a single-size float value.
ReadStr	public	Read a short string.
ReadString	public	Read a string.
ReadUnicodeString	public	Read a Unicode string value.
ReadValue	public	Read the next value in the stream.
ReadWideString	public	Read a widestring value from the stream.
SkipComponent	public	Skip a component's data.
SkipValue	public	Skip a value's data.

See all Methods

Name	Description
TAbstractObjectReader	Abstract driver class to read stored component data.
TBinaryObjectWriter	Driver class which stores component data in binary form.