mirror of
https://github.com/danieleteti/delphimvcframework.git
synced 2024-11-16 00:05:53 +01:00
933 lines
27 KiB
ObjectPascal
933 lines
27 KiB
ObjectPascal
// ***************************************************************************
|
|
//
|
|
// Delphi MVC Framework
|
|
//
|
|
// Copyright (c) 2010-2023 Daniele Teti and the DMVCFramework Team
|
|
//
|
|
// https://github.com/danieleteti/delphimvcframework
|
|
//
|
|
// ***************************************************************************
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
//
|
|
// ***************************************************************************
|
|
|
|
unit MVCFramework.Rtti.Utils;
|
|
|
|
{$I dmvcframework.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
System.Classes,
|
|
System.TypInfo,
|
|
System.Rtti,
|
|
System.Generics.Collections,
|
|
System.SysUtils,
|
|
Data.DB;
|
|
|
|
type
|
|
|
|
TRttiUtils = class sealed
|
|
private
|
|
class constructor Create;
|
|
class destructor Destroy;
|
|
public
|
|
class var GlContext: TRttiContext;
|
|
public
|
|
class function GetMethod(AObject: TObject; AMethodName: string): TRttiMethod;
|
|
|
|
class function GetField(AObject: TObject; const APropertyName: string): TValue; overload;
|
|
class function GetFieldType(AProp: TRttiProperty): string;
|
|
class procedure SetField(AObject: TObject; const APropertyName: string; const AValue: TValue); overload;
|
|
|
|
class function GetPropertyType(AObject: TObject; APropertyName: string): string;
|
|
class function GetProperty(AObject: TObject; const APropertyName: string): TValue;
|
|
// class function GetPropertyAsString(AObject: TObject; const APropertyName: string): string; overload;
|
|
// class function GetPropertyAsString(AObject: TObject; AProperty: TRttiProperty): string; overload;
|
|
class function ExistsProperty(AObject: TObject; const APropertyName: string; out AProperty: TRttiProperty): Boolean;
|
|
class procedure SetProperty(AObject: TObject; const APropertyName: string; const AValue: TValue); overload; static;
|
|
|
|
class function MethodCall(AObject: TObject; AMethodName: string; AParameters: array of TValue;
|
|
ARaiseExceptionIfNotFound: Boolean = true): TValue;
|
|
|
|
class procedure ObjectToDataSet(AObject: TObject; AField: TField; var AValue: Variant);
|
|
class procedure DatasetToObject(ADataset: TDataset; AObject: TObject);
|
|
|
|
class function Clone(AObject: TObject): TObject; static;
|
|
class procedure CopyObject(ASourceObject, ATargetObject: TObject); static;
|
|
|
|
class procedure CopyObjectAS<T: class>(ASourceObject, ATargetObject: TObject); static;
|
|
class function CreateObject(ARttiType: TRttiType; const AParams: TArray<TValue> = nil): TObject; overload; static;
|
|
class function CreateObject(AQualifiedClassName: string; const AParams: TArray<TValue> = nil): TObject;
|
|
overload; static;
|
|
|
|
class function GetAttribute<T: TCustomAttribute>(const AObject: TRttiObject): T; overload;
|
|
class function GetAttribute<T: TCustomAttribute>(const AObject: TRttiType): T; overload;
|
|
|
|
class function HasAttribute<T: TCustomAttribute>(const AObject: TRttiObject): Boolean; overload;
|
|
class function HasAttribute<T: TCustomAttribute>(const AObject: TRttiObject; out AAttribute: T): Boolean; overload;
|
|
class function HasAttribute<T: class>(AObject: TObject; out AAttribute: T): Boolean; overload;
|
|
class function HasAttribute<T: class>(ARttiMember: TRttiMember; out AAttribute: T): Boolean; overload;
|
|
class function HasAttribute<T: class>(ARttiMember: TRttiType; out AAttribute: T): Boolean; overload;
|
|
|
|
class function TValueAsString(const AValue: TValue; const APropertyType, ACustomFormat: string): string;
|
|
class function EqualValues(ASource, ADestination: TValue): Boolean;
|
|
class function FindByProperty<T: class>(AList: TObjectList<T>; APropertyName: string; APropertyValue: TValue): T;
|
|
class procedure ForEachProperty(AClazz: TClass; AProc: TProc<TRttiProperty>);
|
|
// class function HasStringValueAttribute<T: class>(ARttiMember: TRttiMember; out AValue: string): Boolean;
|
|
class function BuildClass(AQualifiedName: string; AParams: array of TValue): TObject;
|
|
class function FindType(AQualifiedName: string): TRttiType;
|
|
class function GetGUID<T>: TGUID;
|
|
class function GetArrayContainedRTTIType(const RTTIType: TRttiType): TRttiType;
|
|
end;
|
|
|
|
{$IF not defined(BERLINORBETTER)}
|
|
TValueHelper = record helper for TValue
|
|
public
|
|
function IsObjectInstance: Boolean;
|
|
end;
|
|
{$ENDIF}
|
|
|
|
function FieldFor(const APropertyName: string): string; inline;
|
|
|
|
implementation
|
|
|
|
uses
|
|
MVCFramework.DuckTyping,
|
|
MVCFramework.Serializer.Commons;
|
|
|
|
class function TRttiUtils.MethodCall(AObject: TObject; AMethodName: string; AParameters: array of TValue;
|
|
ARaiseExceptionIfNotFound: Boolean): TValue;
|
|
var
|
|
m: TRttiMethod;
|
|
T: TRttiType;
|
|
Found: Boolean;
|
|
ParLen: Integer;
|
|
MethodParamsLen: Integer;
|
|
begin
|
|
Found := False;
|
|
T := GlContext.GetType(AObject.ClassInfo);
|
|
ParLen := Length(AParameters);
|
|
m := nil;
|
|
for m in T.GetMethods do
|
|
begin
|
|
MethodParamsLen := Length(m.GetParameters);
|
|
if m.Name.Equals(AMethodName) and (MethodParamsLen = ParLen) then
|
|
begin
|
|
Found := true;
|
|
Break;
|
|
end;
|
|
end;
|
|
|
|
if Found then
|
|
Result := m.Invoke(AObject, AParameters)
|
|
else if ARaiseExceptionIfNotFound then
|
|
raise Exception.CreateFmt('Cannot find compatible method "%s" in the object', [AMethodName]);
|
|
end;
|
|
|
|
function FieldFor(const APropertyName: string): string; inline;
|
|
begin
|
|
Result := 'F' + APropertyName;
|
|
end;
|
|
|
|
class function TRttiUtils.GetAttribute<T>(const AObject: TRttiObject): T;
|
|
var
|
|
Attr: TCustomAttribute;
|
|
begin
|
|
Result := nil;
|
|
for Attr in AObject.GetAttributes do
|
|
begin
|
|
if Attr.ClassType.InheritsFrom(T) then
|
|
Exit(T(Attr));
|
|
end;
|
|
end;
|
|
|
|
class function TRttiUtils.GetArrayContainedRTTIType(
|
|
const RTTIType: TRttiType): TRttiType;
|
|
var
|
|
lName: string;
|
|
begin
|
|
lName := RTTIType.Name;
|
|
if not lName.StartsWith('TArray<') then
|
|
begin
|
|
raise EMVCDeserializationException.CreateFmt('%s is not an array', [lName]);
|
|
end;
|
|
lName := lName.Remove(0, 7);
|
|
lName := lName.Remove(lName.Length - 1);
|
|
Result := GlContext.FindType(lName);
|
|
end;
|
|
|
|
class function TRttiUtils.GetAttribute<T>(const AObject: TRttiType): T;
|
|
var
|
|
Attr: TCustomAttribute;
|
|
begin
|
|
Result := nil;
|
|
for Attr in AObject.GetAttributes do
|
|
begin
|
|
if Attr.ClassType.InheritsFrom(T) then
|
|
Exit(T(Attr));
|
|
end;
|
|
end;
|
|
|
|
class function TRttiUtils.GetField(AObject: TObject; const APropertyName: string): TValue;
|
|
var
|
|
Field: TRttiField;
|
|
Prop: TRttiProperty;
|
|
ARttiType: TRttiType;
|
|
begin
|
|
ARttiType := GlContext.GetType(AObject.ClassType);
|
|
if not Assigned(ARttiType) then
|
|
raise Exception.CreateFmt('Cannot get RTTI for type [%s]', [ARttiType.ToString]);
|
|
Field := ARttiType.GetField(FieldFor(APropertyName));
|
|
if Assigned(Field) then
|
|
Result := Field.GetValue(AObject)
|
|
else
|
|
begin
|
|
Prop := ARttiType.GetProperty(APropertyName);
|
|
if not Assigned(Prop) then
|
|
raise Exception.CreateFmt('Cannot get RTTI for property [%s.%s]', [ARttiType.ToString, APropertyName]);
|
|
Result := Prop.GetValue(AObject);
|
|
end;
|
|
end;
|
|
|
|
class function TRttiUtils.GetProperty(AObject: TObject; const APropertyName: string): TValue;
|
|
var
|
|
Prop: TRttiProperty;
|
|
ARttiType: TRttiType;
|
|
begin
|
|
ARttiType := GlContext.GetType(AObject.ClassType);
|
|
if not Assigned(ARttiType) then
|
|
raise Exception.CreateFmt('Cannot get RTTI for type [%s]', [ARttiType.ToString]);
|
|
Prop := ARttiType.GetProperty(APropertyName);
|
|
if not Assigned(Prop) then
|
|
raise Exception.CreateFmt('Cannot get RTTI for property [%s.%s]', [ARttiType.ToString, APropertyName]);
|
|
if Prop.IsReadable then
|
|
Result := Prop.GetValue(AObject)
|
|
else
|
|
raise Exception.CreateFmt('Property is not readable [%s.%s]', [ARttiType.ToString, APropertyName]);
|
|
end;
|
|
|
|
// class function TRttiUtils.GetPropertyAsString(AObject: TObject; AProperty: TRttiProperty): string;
|
|
// var
|
|
// P: TValue;
|
|
// FT: string;
|
|
// CustomFormat: string;
|
|
// begin
|
|
// if AProperty.IsReadable then
|
|
// begin
|
|
// P := AProperty.GetValue(AObject);
|
|
// FT := GetFieldType(AProperty);
|
|
// HasStringValueAttribute<StringValueAttribute>(AProperty, CustomFormat);
|
|
// Result := TValueAsString(P, FT, CustomFormat);
|
|
// end
|
|
// else
|
|
// Result := '';
|
|
// end;
|
|
//
|
|
// class function TRttiUtils.GetPropertyAsString(AObject: TObject; const APropertyName: string): string;
|
|
// var
|
|
// Prop: TRttiProperty;
|
|
// begin
|
|
// Prop := GlContext.GetType(AObject.ClassType).GetProperty(APropertyName);
|
|
// if Assigned(Prop) then
|
|
// Result := GetPropertyAsString(AObject, Prop)
|
|
// else
|
|
// Result := '';
|
|
// end;
|
|
|
|
class function TRttiUtils.GetPropertyType(AObject: TObject; APropertyName: string): string;
|
|
begin
|
|
Result := GetFieldType(GlContext.GetType(AObject.ClassInfo).GetProperty(APropertyName));
|
|
end;
|
|
|
|
class function TRttiUtils.HasAttribute<T>(const AObject: TRttiObject): Boolean;
|
|
begin
|
|
Result := Assigned(GetAttribute<T>(AObject));
|
|
end;
|
|
|
|
class function TRttiUtils.HasAttribute<T>(ARttiMember: TRttiMember; out AAttribute: T): Boolean;
|
|
var
|
|
attrs: TArray<TCustomAttribute>;
|
|
Attr: TCustomAttribute;
|
|
begin
|
|
AAttribute := nil;
|
|
Result := False;
|
|
attrs := ARttiMember.GetAttributes;
|
|
for Attr in attrs do
|
|
if Attr is T then
|
|
begin
|
|
AAttribute := T(Attr);
|
|
Exit(true);
|
|
end;
|
|
end;
|
|
|
|
class function TRttiUtils.HasAttribute<T>(ARttiMember: TRttiType; out AAttribute: T): Boolean;
|
|
var
|
|
attrs: TArray<TCustomAttribute>;
|
|
Attr: TCustomAttribute;
|
|
begin
|
|
AAttribute := nil;
|
|
Result := False;
|
|
attrs := ARttiMember.GetAttributes;
|
|
for Attr in attrs do
|
|
if Attr is T then
|
|
begin
|
|
AAttribute := T(Attr);
|
|
Exit(true);
|
|
end;
|
|
|
|
end;
|
|
|
|
class function TRttiUtils.HasAttribute<T>(const AObject: TRttiObject; out AAttribute: T): Boolean;
|
|
begin
|
|
AAttribute := GetAttribute<T>(AObject);
|
|
Result := Assigned(AAttribute);
|
|
end;
|
|
|
|
// class function TRttiUtils.HasStringValueAttribute<T>(ARttiMember: TRttiMember; out AValue: string): Boolean;
|
|
// var
|
|
// Attr: T; // StringValueAttribute;
|
|
// begin
|
|
// Result := HasAttribute<T>(ARTTIMember, Attr);
|
|
// if Result then
|
|
// AValue := StringValueAttribute(Attr).Value
|
|
// else
|
|
// AValue := '';
|
|
// end;
|
|
|
|
class procedure TRttiUtils.SetField(AObject: TObject; const APropertyName: string; const AValue: TValue);
|
|
var
|
|
Field: TRttiField;
|
|
Prop: TRttiProperty;
|
|
ARttiType: TRttiType;
|
|
begin
|
|
ARttiType := GlContext.GetType(AObject.ClassType);
|
|
if not Assigned(ARttiType) then
|
|
raise Exception.CreateFmt('Cannot get RTTI for type [%s]', [ARttiType.ToString]);
|
|
Field := ARttiType.GetField(FieldFor(APropertyName));
|
|
if Assigned(Field) then
|
|
Field.SetValue(AObject, AValue)
|
|
else
|
|
begin
|
|
Prop := ARttiType.GetProperty(APropertyName);
|
|
if Assigned(Prop) then
|
|
begin
|
|
if Prop.IsWritable then
|
|
Prop.SetValue(AObject, AValue)
|
|
end
|
|
else
|
|
raise Exception.CreateFmt('Cannot get RTTI for field or property [%s.%s]', [ARttiType.ToString, APropertyName]);
|
|
end;
|
|
end;
|
|
|
|
class procedure TRttiUtils.SetProperty(AObject: TObject; const APropertyName: string; const AValue: TValue);
|
|
var
|
|
Prop: TRttiProperty;
|
|
ARttiType: TRttiType;
|
|
begin
|
|
ARttiType := GlContext.GetType(AObject.ClassType);
|
|
if not Assigned(ARttiType) then
|
|
raise Exception.CreateFmt('Cannot get RTTI for type [%s]', [ARttiType.ToString]);
|
|
Prop := ARttiType.GetProperty(APropertyName);
|
|
if not Assigned(Prop) then
|
|
raise Exception.CreateFmt('Cannot get RTTI for property [%s.%s]', [ARttiType.ToString, APropertyName]);
|
|
if Prop.IsWritable then
|
|
Prop.SetValue(AObject, AValue)
|
|
else
|
|
raise Exception.CreateFmt('Property is not writeable [%s.%s]', [ARttiType.ToString, APropertyName]);
|
|
end;
|
|
|
|
class function TRttiUtils.TValueAsString(const AValue: TValue; const APropertyType, ACustomFormat: string): string;
|
|
begin
|
|
case AValue.Kind of
|
|
tkUnknown:
|
|
Result := '';
|
|
tkInteger:
|
|
Result := IntToStr(AValue.AsInteger);
|
|
tkChar:
|
|
Result := AValue.AsString;
|
|
tkEnumeration:
|
|
if APropertyType = 'boolean' then
|
|
Result := BoolToStr(AValue.AsBoolean, true)
|
|
else
|
|
Result := '(enumeration)';
|
|
tkFloat:
|
|
begin
|
|
if APropertyType = 'datetime' then
|
|
begin
|
|
if ACustomFormat = '' then
|
|
Exit(DateTimeToStr(AValue.AsExtended))
|
|
else
|
|
Exit(FormatDateTime(ACustomFormat, AValue.AsExtended))
|
|
end
|
|
else if APropertyType = 'date' then
|
|
begin
|
|
if ACustomFormat = '' then
|
|
Exit(DateToStr(AValue.AsExtended))
|
|
else
|
|
Exit(FormatDateTime(ACustomFormat, Trunc(AValue.AsExtended)))
|
|
end
|
|
else if APropertyType = 'time' then
|
|
begin
|
|
if ACustomFormat = '' then
|
|
Exit(TimeToStr(AValue.AsExtended))
|
|
else
|
|
Exit(FormatDateTime(ACustomFormat, Frac(AValue.AsExtended)))
|
|
end;
|
|
if ACustomFormat.IsEmpty then
|
|
Result := FloatToStr(AValue.AsExtended)
|
|
else
|
|
Result := FormatFloat(ACustomFormat, AValue.AsExtended);
|
|
end;
|
|
tkString:
|
|
Result := AValue.AsString;
|
|
tkSet:
|
|
Result := '';
|
|
tkClass:
|
|
Result := AValue.AsObject.QualifiedClassName;
|
|
tkMethod:
|
|
Result := '';
|
|
tkWChar:
|
|
Result := AValue.AsString;
|
|
|
|
tkLString:
|
|
Result := AValue.AsString;
|
|
|
|
tkWString:
|
|
Result := AValue.AsString;
|
|
|
|
tkVariant:
|
|
Result := string(AValue.AsVariant);
|
|
|
|
tkArray:
|
|
Result := '(array)';
|
|
tkRecord:
|
|
Result := '(record)';
|
|
tkInterface:
|
|
Result := '(interface)';
|
|
|
|
tkInt64:
|
|
Result := IntToStr(AValue.AsInt64);
|
|
|
|
tkDynArray:
|
|
Result := '(array)';
|
|
|
|
tkUString:
|
|
Result := AValue.AsString;
|
|
tkClassRef:
|
|
Result := '(classref)';
|
|
|
|
tkPointer:
|
|
Result := '(pointer)';
|
|
|
|
tkProcedure:
|
|
Result := '(procedure)';
|
|
else
|
|
Result := '';
|
|
end;
|
|
end;
|
|
|
|
class function TRttiUtils.GetFieldType(AProp: TRttiProperty): string;
|
|
var
|
|
_PropInfo: PTypeInfo;
|
|
begin
|
|
_PropInfo := AProp.PropertyType.Handle;
|
|
if _PropInfo.Kind in [tkString, tkWString, tkChar, tkWChar, tkLString, tkUString] then
|
|
Result := 'string'
|
|
else if _PropInfo.Kind in [tkInteger, tkInt64] then
|
|
Result := 'integer'
|
|
else if _PropInfo = TypeInfo(TDate) then
|
|
Result := 'date'
|
|
else if _PropInfo = TypeInfo(TDateTime) then
|
|
Result := 'datetime'
|
|
else if _PropInfo = TypeInfo(Currency) then
|
|
Result := 'decimal'
|
|
else if _PropInfo = TypeInfo(TTime) then
|
|
begin
|
|
Result := 'time'
|
|
end
|
|
else if _PropInfo.Kind = tkFloat then
|
|
begin
|
|
Result := 'float'
|
|
end
|
|
else if (_PropInfo.Kind = tkEnumeration) { and (_PropInfo.Name = 'Boolean') } then
|
|
Result := 'boolean'
|
|
else if AProp.PropertyType.IsInstance and AProp.PropertyType.AsInstance.MetaclassType.InheritsFrom(TStream) then
|
|
Result := 'blob'
|
|
else
|
|
Result := EmptyStr;
|
|
end;
|
|
|
|
class function TRttiUtils.GetGUID<T>: TGUID;
|
|
var
|
|
Tp: TRttiType;
|
|
begin
|
|
Tp := GlContext.GetType(TypeInfo(T));
|
|
if not(Tp.TypeKind = tkInterface) then
|
|
raise Exception.Create('Type is no interface');
|
|
Result := TRttiInterfaceType(Tp).GUID;
|
|
end;
|
|
|
|
class function TRttiUtils.GetMethod(AObject: TObject; AMethodName: string): TRttiMethod;
|
|
var
|
|
T: TRttiType;
|
|
begin
|
|
T := GlContext.GetType(AObject.ClassInfo);
|
|
Result := T.GetMethod(AMethodName);
|
|
end;
|
|
|
|
class procedure TRttiUtils.ObjectToDataSet(AObject: TObject; AField: TField; var AValue: Variant);
|
|
begin
|
|
AValue := GetProperty(AObject, AField.FieldName).AsVariant;
|
|
end;
|
|
|
|
class procedure TRttiUtils.DatasetToObject(ADataset: TDataset; AObject: TObject);
|
|
var
|
|
ARttiType: TRttiType;
|
|
props: TArray<TRttiProperty>;
|
|
Prop: TRttiProperty;
|
|
f: TField;
|
|
begin
|
|
ARttiType := GlContext.GetType(AObject.ClassType);
|
|
props := ARttiType.GetProperties;
|
|
for Prop in props do
|
|
if not SameText(Prop.Name, 'ID') then
|
|
begin
|
|
f := ADataset.FindField(Prop.Name);
|
|
if Assigned(f) and not f.ReadOnly then
|
|
begin
|
|
if f is TIntegerField then
|
|
SetProperty(AObject, Prop.Name, TIntegerField(f).Value)
|
|
else
|
|
SetProperty(AObject, Prop.Name, TValue.From<Variant>(f.Value))
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
class destructor TRttiUtils.Destroy;
|
|
begin
|
|
GlContext.Free;
|
|
end;
|
|
|
|
class function TRttiUtils.EqualValues(ASource, ADestination: TValue): Boolean;
|
|
begin
|
|
// Really UniCodeCompareStr (Annoying VCL Name for backwards compatablity)
|
|
Result := AnsiCompareStr(ASource.ToString, ADestination.ToString) = 0;
|
|
end;
|
|
|
|
class function TRttiUtils.ExistsProperty(AObject: TObject; const APropertyName: string;
|
|
out AProperty: TRttiProperty): Boolean;
|
|
begin
|
|
AProperty := GlContext.GetType(AObject.ClassInfo).GetProperty(APropertyName);
|
|
Result := Assigned(AProperty);
|
|
end;
|
|
|
|
class function TRttiUtils.FindByProperty<T>(AList: TObjectList<T>; APropertyName: string; APropertyValue: TValue): T;
|
|
var
|
|
elem: T;
|
|
V: TValue;
|
|
Found: Boolean;
|
|
begin
|
|
Found := False;
|
|
for elem in AList do
|
|
begin
|
|
V := GetProperty(elem, APropertyName);
|
|
case V.Kind of
|
|
tkInteger:
|
|
Found := V.AsInteger = APropertyValue.AsInteger;
|
|
tkFloat:
|
|
Found := abs(V.AsExtended - APropertyValue.AsExtended) < 0.001;
|
|
tkString, tkLString, tkWString, tkUString:
|
|
Found := V.AsString = APropertyValue.AsString;
|
|
tkInt64:
|
|
Found := V.AsInt64 = APropertyValue.AsInt64;
|
|
else
|
|
raise Exception.Create('Property type not supported');
|
|
end;
|
|
if Found then
|
|
Exit(elem);
|
|
end;
|
|
Result := nil;
|
|
end;
|
|
|
|
class function TRttiUtils.FindType(AQualifiedName: string): TRttiType;
|
|
begin
|
|
Result := GlContext.FindType(AQualifiedName);
|
|
end;
|
|
|
|
class procedure TRttiUtils.ForEachProperty(AClazz: TClass; AProc: TProc<TRttiProperty>);
|
|
var
|
|
_rtti: TRttiType;
|
|
P: TRttiProperty;
|
|
begin
|
|
_rtti := GlContext.GetType(AClazz);
|
|
if Assigned(_rtti) then
|
|
begin
|
|
for P in _rtti.GetProperties do
|
|
AProc(P);
|
|
end;
|
|
end;
|
|
|
|
class procedure TRttiUtils.CopyObject(ASourceObject, ATargetObject: TObject);
|
|
var
|
|
_ARttiType: TRttiType;
|
|
Field: TRttiField;
|
|
master, cloned: TObject;
|
|
Src: TObject;
|
|
sourceStream: TStream;
|
|
SavedPosition: Int64;
|
|
targetStream: TStream;
|
|
targetCollection: IWrappedList;
|
|
sourceCollection: IWrappedList;
|
|
I: Integer;
|
|
sourceObject: TObject;
|
|
targetObject: TObject;
|
|
Tar: TObject;
|
|
begin
|
|
if not Assigned(ATargetObject) then
|
|
Exit;
|
|
|
|
_ARttiType := GlContext.GetType(ASourceObject.ClassType);
|
|
cloned := ATargetObject;
|
|
master := ASourceObject;
|
|
for Field in _ARttiType.GetFields do
|
|
begin
|
|
if not Field.FieldType.IsInstance then
|
|
Field.SetValue(cloned, Field.GetValue(master))
|
|
else
|
|
begin
|
|
Src := Field.GetValue(ASourceObject).AsObject;
|
|
if Src is TStream then
|
|
begin
|
|
sourceStream := TStream(Src);
|
|
SavedPosition := sourceStream.Position;
|
|
sourceStream.Position := 0;
|
|
if Field.GetValue(cloned).IsEmpty then
|
|
begin
|
|
targetStream := TMemoryStream.Create;
|
|
Field.SetValue(cloned, targetStream);
|
|
end
|
|
else
|
|
targetStream := Field.GetValue(cloned).AsObject as TStream;
|
|
targetStream.Position := 0;
|
|
targetStream.CopyFrom(sourceStream, sourceStream.Size);
|
|
targetStream.Position := SavedPosition;
|
|
sourceStream.Position := SavedPosition;
|
|
end
|
|
else if TDuckTypedList.CanBeWrappedAsList(Src) then
|
|
begin
|
|
sourceCollection := WrapAsList(Src);
|
|
Tar := Field.GetValue(cloned).AsObject;
|
|
if Assigned(Tar) then
|
|
begin
|
|
targetCollection := WrapAsList(Tar);
|
|
targetCollection.Clear;
|
|
for I := 0 to sourceCollection.Count - 1 do
|
|
targetCollection.Add(TRttiUtils.Clone(sourceCollection.GetItem(I)));
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
sourceObject := Src;
|
|
|
|
if Field.GetValue(cloned).IsEmpty then
|
|
begin
|
|
targetObject := TRttiUtils.Clone(sourceObject);
|
|
Field.SetValue(cloned, targetObject);
|
|
end
|
|
else
|
|
begin
|
|
targetObject := Field.GetValue(cloned).AsObject;
|
|
TRttiUtils.CopyObject(sourceObject, targetObject);
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
{$IF CompilerVersion >= 24.0}
|
|
|
|
class procedure TRttiUtils.CopyObjectAS<T>(ASourceObject, ATargetObject: TObject);
|
|
var
|
|
_ARttiType: TRttiType;
|
|
_ARttiTypeTarget: TRttiType;
|
|
Field, FieldDest: TRttiField;
|
|
master, cloned: TObject;
|
|
Src: TObject;
|
|
sourceStream: TStream;
|
|
SavedPosition: Int64;
|
|
targetStream: TStream;
|
|
targetCollection: IWrappedList;
|
|
sourceCollection: IWrappedList;
|
|
I: Integer;
|
|
sourceObject: TObject;
|
|
targetObject: TObject;
|
|
Tar: TObject;
|
|
begin
|
|
if not Assigned(ATargetObject) then
|
|
Exit;
|
|
|
|
_ARttiType := GlContext.GetType(ASourceObject.ClassType);
|
|
_ARttiTypeTarget := GlContext.GetType(ATargetObject.ClassType);
|
|
|
|
cloned := ATargetObject;
|
|
master := ASourceObject;
|
|
for Field in _ARttiType.GetFields do
|
|
begin
|
|
FieldDest := _ARttiTypeTarget.GetField(Field.Name);
|
|
if not Assigned(FieldDest) then
|
|
continue;
|
|
if not Field.FieldType.IsInstance then
|
|
begin
|
|
FieldDest.SetValue(cloned, Field.GetValue(master));
|
|
end
|
|
else
|
|
begin
|
|
Src := Field.GetValue(ASourceObject).AsObject;
|
|
if not Assigned(Src) then
|
|
begin
|
|
FieldDest.SetValue(cloned, Src);
|
|
|
|
end
|
|
else if Src is TStream then
|
|
begin
|
|
sourceStream := TStream(Src);
|
|
SavedPosition := sourceStream.Position;
|
|
sourceStream.Position := 0;
|
|
if FieldDest.GetValue(cloned).IsEmpty then
|
|
begin
|
|
targetStream := TMemoryStream.Create;
|
|
FieldDest.SetValue(cloned, targetStream);
|
|
end
|
|
else
|
|
targetStream := FieldDest.GetValue(cloned).AsObject as TStream;
|
|
targetStream.Position := 0;
|
|
targetStream.CopyFrom(sourceStream, sourceStream.Size);
|
|
targetStream.Position := SavedPosition;
|
|
sourceStream.Position := SavedPosition;
|
|
end
|
|
else if TDuckTypedList.CanBeWrappedAsList(Src) then
|
|
begin
|
|
sourceCollection := WrapAsList(Src);
|
|
Tar := FieldDest.GetValue(cloned).AsObject;
|
|
if Assigned(Tar) then
|
|
begin
|
|
targetCollection := WrapAsList(Tar);
|
|
targetCollection.Clear;
|
|
for I := 0 to sourceCollection.Count - 1 do
|
|
targetCollection.Add(TRttiUtils.Clone(sourceCollection.GetItem(I)));
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
sourceObject := Src;
|
|
|
|
if FieldDest.GetValue(cloned).IsEmpty then
|
|
begin
|
|
targetObject := TRttiUtils.Clone(sourceObject);
|
|
FieldDest.SetValue(cloned, targetObject);
|
|
end
|
|
else
|
|
begin
|
|
targetObject := FieldDest.GetValue(cloned).AsObject;
|
|
TRttiUtils.CopyObject(sourceObject, targetObject);
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
{$ENDIF}
|
|
|
|
class constructor TRttiUtils.Create;
|
|
begin
|
|
GlContext := TRttiContext.Create;
|
|
end;
|
|
|
|
class function TRttiUtils.CreateObject(AQualifiedClassName: string; const AParams: TArray<TValue> = nil): TObject;
|
|
var
|
|
rttitype: TRttiType;
|
|
begin
|
|
rttitype := GlContext.FindType(AQualifiedClassName);
|
|
if Assigned(rttitype) then
|
|
Result := CreateObject(rttitype, AParams)
|
|
else
|
|
raise Exception.Create('Cannot find RTTI for ' + AQualifiedClassName +
|
|
'. Hint: Is the specified classtype linked in the module?');
|
|
end;
|
|
|
|
class function TRttiUtils.CreateObject(ARttiType: TRttiType; const AParams: TArray<TValue> = nil): TObject;
|
|
var
|
|
Method: TRttiMethod;
|
|
metaClass: TClass;
|
|
lParamsCount: Integer;
|
|
begin
|
|
if AParams = nil then
|
|
begin
|
|
lParamsCount := 0;
|
|
end
|
|
else
|
|
begin
|
|
lParamsCount := Length(AParams);
|
|
end;
|
|
|
|
{ First solution, clear and slow }
|
|
metaClass := nil;
|
|
Method := nil;
|
|
for Method in ARttiType.GetMethods do
|
|
begin
|
|
if Method.HasExtendedInfo and Method.IsConstructor then
|
|
begin
|
|
if Length(Method.GetParameters) = lParamsCount then
|
|
begin
|
|
metaClass := ARttiType.AsInstance.MetaclassType;
|
|
Break;
|
|
end;
|
|
end;
|
|
end;
|
|
if Assigned(metaClass) then
|
|
begin
|
|
if AParams = nil then
|
|
begin
|
|
Result := Method.Invoke(metaClass, []).AsObject;
|
|
end
|
|
else
|
|
begin
|
|
Result := Method.Invoke(metaClass, AParams).AsObject;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
raise Exception.Create('Cannot find a parameterless constructor for ' + ARttiType.ToString);
|
|
end;
|
|
|
|
{ Second solution, dirty and fast }
|
|
// Result := TObject(ARttiType.GetMethod('Create')
|
|
// .Invoke(ARttiType.AsInstance.MetaclassType, []).AsObject);
|
|
end;
|
|
|
|
class function TRttiUtils.BuildClass(AQualifiedName: string; AParams: array of TValue): TObject;
|
|
var
|
|
T: TRttiType;
|
|
V: TValue;
|
|
begin
|
|
|
|
T := FindType(AQualifiedName);
|
|
V := T.GetMethod('Create').Invoke(T.AsInstance.MetaclassType, AParams);
|
|
Result := V.AsObject;
|
|
end;
|
|
|
|
class function TRttiUtils.Clone(AObject: TObject): TObject;
|
|
var
|
|
_ARttiType: TRttiType;
|
|
lField: TRttiField;
|
|
lMaster, lCloned: TObject;
|
|
Src: TObject;
|
|
lSourceStream: TStream;
|
|
lSavedPosition: Int64;
|
|
lTargetStream: TStream;
|
|
lTargetCollection: TObjectList<TObject>;
|
|
lSourceCollection: TObjectList<TObject>;
|
|
I: Integer;
|
|
lSourceObject: TObject;
|
|
lTargetObject: TObject;
|
|
begin
|
|
Result := nil;
|
|
if not Assigned(AObject) then
|
|
Exit;
|
|
|
|
_ARttiType := GlContext.GetType(AObject.ClassType);
|
|
lCloned := CreateObject(_ARttiType);
|
|
lMaster := AObject;
|
|
for lField in _ARttiType.GetFields do
|
|
begin
|
|
if not lField.FieldType.IsInstance then
|
|
begin
|
|
lField.SetValue(lCloned, lField.GetValue(lMaster))
|
|
end
|
|
else
|
|
begin
|
|
Src := lField.GetValue(AObject).AsObject;
|
|
if Src is TStream then
|
|
begin
|
|
lSourceStream := TStream(Src);
|
|
lSavedPosition := lSourceStream.Position;
|
|
lSourceStream.Position := 0;
|
|
if lField.GetValue(lCloned).IsEmpty then
|
|
begin
|
|
lTargetStream := TMemoryStream.Create;
|
|
lField.SetValue(lCloned, lTargetStream);
|
|
end
|
|
else
|
|
lTargetStream := lField.GetValue(lCloned).AsObject as TStream;
|
|
lTargetStream.Position := 0;
|
|
lTargetStream.CopyFrom(lSourceStream, lSourceStream.Size);
|
|
lTargetStream.Position := lSavedPosition;
|
|
lSourceStream.Position := lSavedPosition;
|
|
end
|
|
else if Src is TObjectList<TObject> then
|
|
begin
|
|
lSourceCollection := TObjectList<TObject>(Src);
|
|
if lField.GetValue(lCloned).IsEmpty then
|
|
begin
|
|
lTargetCollection := TObjectList<TObject>.Create;
|
|
lField.SetValue(lCloned, lTargetCollection);
|
|
end
|
|
else
|
|
lTargetCollection := lField.GetValue(lCloned).AsObject as TObjectList<TObject>;
|
|
for I := 0 to lSourceCollection.Count - 1 do
|
|
begin
|
|
lTargetCollection.Add(TRttiUtils.Clone(lSourceCollection[I]));
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
lSourceObject := Src;
|
|
|
|
if lField.GetValue(lCloned).IsEmpty then
|
|
begin
|
|
lTargetObject := TRttiUtils.Clone(lSourceObject);
|
|
lField.SetValue(lCloned, lTargetObject);
|
|
end
|
|
else
|
|
begin
|
|
lTargetObject := lField.GetValue(lCloned).AsObject;
|
|
TRttiUtils.CopyObject(lSourceObject, lTargetObject);
|
|
end;
|
|
lField.SetValue(lCloned, lTargetObject);
|
|
end;
|
|
end;
|
|
|
|
end;
|
|
Result := lCloned;
|
|
end;
|
|
|
|
class function TRttiUtils.HasAttribute<T>(AObject: TObject; out AAttribute: T): Boolean;
|
|
begin
|
|
Result := HasAttribute<T>(GlContext.GetType(AObject.ClassType), AAttribute)
|
|
end;
|
|
|
|
{$IF not defined(BERLINORBETTER)}
|
|
|
|
{ TValueHelper }
|
|
|
|
function TValueHelper.IsObjectInstance: Boolean;
|
|
begin
|
|
Result := (Self.TypeInfo <> nil) and (Self.TypeInfo^.Kind = tkClass);
|
|
end;
|
|
|
|
{$ENDIF}
|
|
|
|
end.
|