Json Serializer und GUID

[Stevie]

Einfach nen Konverter für TGUID schreiben und am Serializer hinzufügen, fertig:

Delphi-Quellcode:

type
  TGUIDConverter = class(TJsonConverter)
  public
    function CanConvert(ATypeInfo: PTypeInfo): Boolean; override;
    function ReadJson(const AReader: TJsonReader; ATypeInf: PTypeInfo; const AExistingValue: TValue;
      const ASerializer: TJsonSerializer): TValue; override;
    procedure WriteJson(const AWriter: TJsonWriter; const AValue: TValue;
      const ASerializer: TJsonSerializer);override;
  end;

function TGUIDConverter.CanConvert(ATypeInfo: PTypeInfo): Boolean;
begin
  Result := ATypeInfo = System.TypeInfo(TGUID);
end;

function TGUIDConverter.ReadJson(const AReader: TJsonReader;
  ATypeInf: PTypeInfo; const AExistingValue: TValue;
  const ASerializer: TJsonSerializer): TValue;
begin
  Result := TValue.From(TGuid.Create(AReader.Value.AsString));
end;

procedure TGUIDConverter.WriteJson(const AWriter: TJsonWriter;
  const AValue: TValue; const ASerializer: TJsonSerializer);
begin
  AWriter.WriteValue(AValue.AsType<TGUID>);
end;

type
  TFooBar = class
    GUID: TGUID;
  end;
procedure Main;
begin
  var foobar := TFooBar.Create;
  foobar.GUID := TGUID.NewGuid;
  Writeln(foobar.GUID.ToString);

  var lSerializer := TJsonSerializer.Create;
  lSerializer.Converters.Add(TGUIDConverter.Create);

  var lJson := lSerializer.Serialize(foobar);

  Writeln(lJson);

  var newFooBar := lSerializer.Deserialize<TFooBar>(lJson);
  Writeln(newFooBar.GUID.ToString);
end;