Only working with Delphi (delphi xe) for 2 months now and I'm stumbling across a problem extending the MyAccess.TMyTable class and implementing an extra generics based interface. If you consider the first code block below you'll notice at the end that I call the save function for each mapper. The save function of the last mapper is never called and just skipped. I suspect it has something to do with the interface implementation of the TMyTable class. Could someone point out to me why this is happening?
Main application:
Code: Select all
program Project1;
uses
Forms, classes,
Unit1 in 'Unit1.pas' {Form1} ,
Unit2 in 'Unit2.pas',
Unit3 in 'Unit3.pas';
{$R *.res}
var
Mapper1: Unit3.TObjectMapper1;
Mapper2: Unit3.TObjectMapper2;
Mapper3: Unit3.TObjectMapper3;
Object1,Object2,Object3: Unit3.Tobject1;
Main: Unit3.TObject4;
begin
Application.Initialize;
Application.MainFormOnTaskbar := True;
Application.CreateForm(TForm1, Form1);
Mapper1 := Unit3.TObjectMapper1.Create(Application as TComponent);
Mapper2 := Unit3.TObjectMapper2.Create(Application as TComponent);
Mapper3 := Unit3.TObjectMapper3.Create(Application as TComponent);
Main := TObject4.Create;
Main.Mapper1 := Mapper1;
Main.Mapper2 := Mapper2;
Main.Mapper3 := Mapper3;
Object1 := Main.Mapper1.Save(nil);
Object2 := Main.Mapper2.Save(nil);
Object3 := Main.Mapper3.Save(nil);
Application.Run;
end.
Code: Select all
unit Unit2;
interface
uses Generics.Collections;
type
IAbstract<T> = Interface
['{9825427D-25CB-47B0-8549-4D2810AEDB16}']
function FindAll(): TObjectDictionary<String, T>;
function Find(Select: String): T;
function Save(Obj: T): T;
function Remove(Obj: T): Boolean;
End;
implementation
end.
Code: Select all
unit Unit3;
interface
uses Unit2, Generics.collections, MyAccess;
type
Tobject1 = Class
End;
TObject4 = Class
mapper1: IAbstract<Tobject1>;
mapper2: IAbstract<Tobject1>;
mapper3: IAbstract<Tobject1>;
End;
TObjectMapper1 = class(MyAccess.TMyTable, IAbstract<Tobject1>)
function FindAll(): TObjectDictionary<String, Tobject1>;
function Find(Select: String): Tobject1;
function Save(Obj: Tobject1): Tobject1;
function Remove(Obj: Tobject1): Boolean;
End;
TObjectMapper2 = class(MyAccess.TMyTable, IAbstract<Tobject1>)
function FindAll(): TObjectDictionary<String, Tobject1>;
function Find(Select: String): Tobject1;
function Save(Obj: Tobject1): Tobject1;
function Remove(Obj: Tobject1): Boolean;
End;
TObjectMapper3 = class(MyAccess.TMyTable, IAbstract<Tobject1>)
function FindAll(): TObjectDictionary<String, Tobject1>;
function Find(Select: String): Tobject1;
function Save(Obj: Tobject1): Tobject1;
function Remove(Obj: Tobject1): Boolean;
End;
implementation
function TObjectMapper1.FindAll(): TObjectDictionary<String, Tobject1>;
begin
end;
function TObjectMapper1.Find(Select: String): Tobject1;
begin
end;
function TObjectMapper1.Save(Obj: Tobject1): Tobject1;
begin
end;
function TObjectMapper1.Remove(Obj: Tobject1): Boolean;
begin
end;
function TObjectMapper2.FindAll(): TObjectDictionary<String, Tobject1>;
begin
end;
function TObjectMapper2.Find(Select: String): Tobject1;
begin
end;
function TObjectMapper2.Save(Obj: Tobject1): Tobject1;
begin
end;
function TObjectMapper2.Remove(Obj: Tobject1): Boolean;
begin
end;
function TObjectMapper3.FindAll(): TObjectDictionary<String, Tobject1>;
begin
end;
function TObjectMapper3.Find(Select: String): Tobject1;
begin
end;
function TObjectMapper3.Save(Obj: Tobject1): Tobject1;
begin
end;
function TObjectMapper3.Remove(Obj: Tobject1): Boolean;
begin
end;
end.