procedure GetBaseClassInfo(AClass: TObject; AStrings: TStrings);
{ This method obtains some basic RTTI data from the given object and adds that
information to the AStrings parameter. }
var
ClassTypeInfo: PTypeInfo;
ClassTypeData: PTypeData;
EnumName: String;
begin
ClassTypeInfo := AClass.ClassInfo;
ClassTypeData := GetTypeData(ClassTypeInfo);
with AStrings do
begin
Add(Format('Class Name: %s', [ClassTypeInfo.Name]));
EnumName := GetEnumName(TypeInfo(TTypeKind), Integer(ClassTypeInfo.Kind));
Add(Format('Kind: %s', [EnumName]));
Add(Format('Size: %d', [AClass.InstanceSize]));
Add(Format('Defined in: %s.pas', [ClassTypeData.UnitName]));
Add(Format('Num Properties: %d',[ClassTypeData.PropCount]));
end;
end;
{ This method obtains some basic RTTI data from the given object and adds that
information to the AStrings parameter. }
var
ClassTypeInfo: PTypeInfo;
ClassTypeData: PTypeData;
EnumName: String;
begin
ClassTypeInfo := AClass.ClassInfo;
ClassTypeData := GetTypeData(ClassTypeInfo);
with AStrings do
begin
Add(Format('Class Name: %s', [ClassTypeInfo.Name]));
EnumName := GetEnumName(TypeInfo(TTypeKind), Integer(ClassTypeInfo.Kind));
Add(Format('Kind: %s', [EnumName]));
Add(Format('Size: %d', [AClass.InstanceSize]));
Add(Format('Defined in: %s.pas', [ClassTypeData.UnitName]));
Add(Format('Num Properties: %d',[ClassTypeData.PropCount]));
end;
end;
procedure GetClassProperties(AClass: TObject; AStrings: TStrings);
{ This method retrieves the property names and types for the given object
and adds that information to the AStrings parameter. }
var
PropList: PPropList;
ClassTypeInfo: PTypeInfo;
ClassTypeData: PTypeData;
i: integer;
NumProps: Integer;
begin
ClassTypeData := GetTypeData(ClassTypeInfo);
begin
// allocate the memory needed to hold the references to the TPropInfo
// structures on the number of properties.
GetMem(PropList, SizeOf(PPropInfo) * ClassTypeData.PropCount);
try
// fill PropList with the pointer references to the TPropInfo structures
GetPropInfos(AClass.ClassInfo, PropList);
for i := 0 to ClassTypeData.PropCount - 1 do
// filter out properties that are events ( method pointer properties)
if not (PropList[i]^.PropType^.Kind = tkMethod) then
AStrings.Add(Format('%s: %s', [PropList[i]^.Name, PropList[i]^.PropType^.Name]));
NumProps := GetPropList(AClass.ClassInfo, [tkMethod], PropList);
if NumProps <> 0 then begin
AStrings.Add('');
AStrings.Add(' EVENTS ================ ');
AStrings.Add('');
end;
// Fill the AStrings with the events.
for i := 0 to NumProps - 1 do
AStrings.Add(Format('%s: %s', [PropList[i]^.Name, PropList[i]^.PropType^.Name]));
FreeMem(PropList, SizeOf(PPropInfo) * ClassTypeData.PropCount);
end;
end;
{ This method retrieves the property names and types for the given object
and adds that information to the AStrings parameter. }
var
PropList: PPropList;
ClassTypeInfo: PTypeInfo;
ClassTypeData: PTypeData;
i: integer;
NumProps: Integer;
begin
ClassTypeInfo :
= AClass.ClassInfo;ClassTypeData := GetTypeData(ClassTypeInfo);
if ClassTypeData.PropCount <> 0 then
begin
// allocate the memory needed to hold the references to the TPropInfo
// structures on the number of properties.
GetMem(PropList, SizeOf(PPropInfo) * ClassTypeData.PropCount);
try
// fill PropList with the pointer references to the TPropInfo structures
GetPropInfos(AClass.ClassInfo, PropList);
for i := 0 to ClassTypeData.PropCount - 1 do
// filter out properties that are events ( method pointer properties)
if not (PropList[i]^.PropType^.Kind = tkMethod) then
AStrings.Add(Format('%s: %s', [PropList[i]^.Name, PropList[i]^.PropType^.Name]));
// Now get properties that are events (method pointer properties)
NumProps := GetPropList(AClass.ClassInfo, [tkMethod], PropList);
if NumProps <> 0 then begin
AStrings.Add('');
AStrings.Add(' EVENTS ================ ');
AStrings.Add('');
end;
// Fill the AStrings with the events.
for i := 0 to NumProps - 1 do
AStrings.Add(Format('%s: %s', [PropList[i]^.Name, PropList[i]^.PropType^.Name]));
finally
FreeMem(PropList, SizeOf(PPropInfo) * ClassTypeData.PropCount);
end;
end;
end;
运用Delphi 的 RTTI可以实现 Java 与 C# 下的反射机制，只是大家在Delphi 下做 RAD开发做多了，没有关注到这些关键的技术，接下来会写一个Delphi 下的OR Mapping框架，到时候会与大家分享。