Alex.

I employ different techniques when I find these debugging problems, but it mostly works. The newer Delphi versions are pretty stable in this regard.

Alex.

Life without a debugger is not fun!

As for classes, ISerializable is used to supply you own serialization code if you so choose. The default serialization method (by going recursively) is used on all classes if those do not provide their own ISerializable code.

Hmmm… Serialization of interfaces isn’t quite working as expected:

IFoo = interface(ISerializable)

end;

TFoo = class(TInterfacedObject, IFoo)
procedure Serialize(const AData: TSerializationData);
procedure Deserialize(const AData: TDeserializationData);

end;

TTest = class
FFoo : IFoo;
public
constructor Create;
end;

{ TFoo }

procedure TFoo.Deserialize(const AData: TDeserializationData);
begin
//
end;

procedure TFoo.Serialize(const AData: TSerializationData);
begin
//
end;

{ TTest }

constructor TTest.Create()
begin
FFoo := TFoo.Create;
end;

Now when I pass a copy of TTest to the serializer (as per your example http://alex.ciobanu.org/?p=285) I get:

“The entity FFoo of type IFoo does not define any serialization/deseriazlion method.”

This seems strange to me as IFoo is inherited from ISerializable.

I prefer using interfaces as fields in my classes as I don’t need to worry about freeing them. This example works fine if I change FFoo : IFoo -> FFoo : TFoo in TTest.

Problem 2
————

By the way I discovered this during investigating another serious problem: I can’t get any of your collection interfaces to serialize naturally (ie. if they are fields in TTest.)

Originally I suspected this was because your base collection interface isn’t derived from ISerializable but having manually changed your code to inherit from ISerializable

Problem 3
————-
Finally… I don’t get something. In your example (http://alex.ciobanu.org/?p=285), TTest is not supporting ISerializable but yet we can serialize it. So why must you insist that member object fields are ISerializable why can’t we just apply the same process to them that is being applied to TTest?!

—-

Thanks for your help in advance. Am I being really stupid?