unit Strings;
interface

{ TPersistent abstract class }

{$M+}

  TPersistent = class(TObject)
  private
    procedure AssignError(Source: TPersistent);
  protected
    procedure AssignTo(Dest: TPersistent); virtual;
    procedure DefineProperties(Filer: TFiler); virtual;
    function  GetOwner: TPersistent; dynamic;
  public
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); virtual;
    function  GetNamePath: string; dynamic;
  end;

{$M-}

{ TPersistent class reference type }

{ TStrings class }

  TStrings = class(TPersistent)
  private
    FUpdateCount: Integer;
    FAdapter: IStringsAdapter;
    function GetCommaText: string;
    function GetName(Index: Integer): string;
    function GetValue(const Name: string): string;
    procedure ReadData(Reader: TReader);
    procedure SetCommaText(const Value: string);
    procedure SetStringsAdapter(const Value: IStringsAdapter);
    procedure SetValue(const Name, Value: string);
    procedure WriteData(Writer: TWriter);
  protected
    procedure DefineProperties(Filer: TFiler); override;
    procedure Error(const Msg: string; Data: Integer);
    function Get(Index: Integer): string; virtual; abstract;
    function GetCapacity: Integer; virtual;
    function GetCount: Integer; virtual; abstract;
    function GetObject(Index: Integer): TObject; virtual;
    function GetTextStr: string; virtual;
    procedure Put(Index: Integer; const S: string); virtual;
    procedure PutObject(Index: Integer; AObject: TObject); virtual;
    procedure SetCapacity(NewCapacity: Integer); virtual;
    procedure SetTextStr(const Value: string); virtual;
    procedure SetUpdateState(Updating: Boolean); virtual;
  public
    destructor Destroy; override;
    function Add(const S: string): Integer; virtual;
    function AddObject(const S: string; AObject: TObject): Integer; virtual;
    procedure Append(const S: string);
    procedure AddStrings(Strings: TStrings); virtual;
    procedure Assign(Source: TPersistent); override;
    procedure BeginUpdate;
    procedure Clear; virtual; abstract;
    procedure Delete(Index: Integer); virtual; abstract;
    procedure EndUpdate;
    function Equals(Strings: TStrings): Boolean;
    procedure Exchange(Index1, Index2: Integer); virtual;
    function GetText: PChar; virtual;
    function IndexOf(const S: string): Integer; virtual;
    function IndexOfName(const Name: string): Integer;
    function IndexOfObject(AObject: TObject): Integer;
    procedure Insert(Index: Integer; const S: string); virtual; abstract;
    procedure InsertObject(Index: Integer; const S: string;
      AObject: TObject);
    procedure LoadFromFile(const FileName: string); virtual;
    procedure LoadFromStream(Stream: TStream); virtual;
    procedure Move(CurIndex, NewIndex: Integer); virtual;
    procedure SaveToFile(const FileName: string); virtual;
    procedure SaveToStream(Stream: TStream); virtual;
    procedure SetText(Text: PChar); virtual;
    property Capacity: Integer read GetCapacity write SetCapacity;
    property CommaText: string read GetCommaText write SetCommaText;
    property Count: Integer read GetCount;
    property Names[Index: Integer]: string read GetName;
    property Objects[Index: Integer]: TObject read GetObject write PutObject;
    property Values[const Name: string]: string read GetValue write SetValue;
    property Strings[Index: Integer]: string read Get write Put; default;
    property Text: string read GetTextStr write SetTextStr;
    property StringsAdapter: IStringsAdapter read FAdapter write SetStringsAdapter;
  end;
implementation
end.