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Quick.Json.Serializer.pas
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{ ***************************************************************************
Copyright (c) 2015-2018 Kike Pérez
Unit : Quick.JSON.Serializer
Description : Json Serializer
Author : Kike Pérez
Version : 1.4
Created : 21/05/2018
Modified : 21/09/2018
This file is part of QuickLib: https://github.com/exilon/QuickLib
***************************************************************************
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 Quick.Json.Serializer;
{$i QuickLib.inc}
interface
uses
Classes,
SysUtils,
Rtti,
TypInfo,
{$IFDEF FPC}
rttiutils,
fpjson,
jsonparser,
strUtils,
//jsonreader,
//fpjsonrtti,
Quick.Json.fpc.Compatibility,
{$ELSE}
{$IFDEF DELPHIXE7_UP}
System.Json,
{$ENDIF}
{$ENDIF}
DateUtils,
Quick.Commons,
Quick.JSON.Utils;
type
EJsonSerializeError = class(Exception);
EJsonDeserializeError = class(Exception);
{$IFNDEF FPC}
TNotSerializableProperty = class(TCustomAttribute);
TCommentProperty = class(TCustomAttribute)
private
fComment : string;
public
constructor Create(const aComment: string);
property Comment : string read fComment;
end;
TCustomNameProperty = class(TCustomAttribute)
private
fName : string;
public
constructor Create(const aName: string);
property Name : string read fName;
end;
{$ENDIF}
IJsonSerializer = interface
['{CA26F7AE-F1FE-41BE-9C23-723A687F60D1}']
function JsonToObject(aType: TClass; const aJson: string): TObject; overload;
function JsonToObject(aObject: TObject; const aJson: string): TObject; overload;
function ObjectToJson(aObject : TObject; aIndent : Boolean = False): string;
end;
TSerializeLevel = (slPublicProperty, slPublishedProperty);
PValue = ^TValue;
TRTTIJson = class
private
fSerializeLevel : TSerializeLevel;
function GetValue(aAddr: Pointer; aType: TRTTIType): TValue; overload;
function GetValue(aAddr: Pointer; aTypeInfo: PTypeInfo): TValue; overload;
function IsAllowedProperty(aObject : TObject; const aPropertyName : string) : Boolean;
function IsGenericList(aObject : TObject) : Boolean;
function GetPropertyValue(Instance : TObject; const PropertyName : string) : TValue;
procedure SetPropertyValue(Instance : TObject; aPropInfo : PPropInfo; aValue : TValue); overload;
procedure SetPropertyValue(Instance : TObject; const PropertyName : string; aValue : TValue); overload;
{$IFDEF FPC}
function FloatProperty(aObject : TObject; aPropInfo: PPropInfo): string;
function GetPropType(aPropInfo: PPropInfo): PTypeInfo;
procedure LoadSetProperty(aInstance : TObject; aPropInfo: PPropInfo; const aValue: string);
{$ENDIF}
public
constructor Create(aSerializeLevel : TSerializeLevel);
{$IFNDEF FPC}
function DeserializeDynArray(aTypeInfo : PTypeInfo; aObject : TObject; const aJsonArray: TJSONArray) : TValue;
function DeserializeRecord(aRecord : TValue; aObject : TObject; const aJson : TJSONObject) : TValue;
{$ELSE}
procedure DeserializeDynArray(aTypeInfo: PTypeInfo; const aPropertyName : string; aObject: TObject; const aJsonArray: TJSONArray);
{$ENDIF}
function DeserializeClass(aType : TClass; const aJson : TJSONObject) : TObject;
function DeserializeObject(aObject : TObject; const aJson : TJSONObject) : TObject; overload;
{$IFNDEF FPC}
function DeserializeList(aObject: TObject; const aName : string; const aJson: TJSONObject) : TObject;
{$ENDIF}
function DeserializeProperty(aObject : TObject; const aName : string; aProperty : TRttiProperty; const aJson : TJSONObject) : TObject; overload;
{$IFNDEF FPC}
function DeserializeType(aObject : TObject; aType : TTypeKind; aTypeInfo : PTypeInfo; const aValue: string) : TValue;
{$ELSE}
function DeserializeType(aObject : TObject; aType : TTypeKind; const aPropertyName, aValue: string) : TValue;
{$ENDIF}
{$IFNDEF FPC}
function Serialize(const aName : string; aValue : TValue) : TJSONPair; overload;
{$ELSE}
function Serialize(aObject : TObject; aType : TTypeKind; const aPropertyName : string) : TJSONPair;
function Serialize(const aName : string; aValue : TValue) : TJSONPair;
{$ENDIF}
function Serialize(aObject : TObject) : TJSONObject; overload;
end;
TJsonSerializer = class(TInterfacedObject,IJsonSerializer)
strict private
fSerializeLevel : TSerializeLevel;
fRTTIJson : TRTTIJson;
public
constructor Create(aSerializeLevel : TSerializeLevel);
destructor Destroy; override;
property SerializeLevel : TSerializeLevel read fSerializeLevel;
function JsonToObject(aType : TClass; const aJson: string) : TObject; overload;
function JsonToObject(aObject : TObject; const aJson: string) : TObject; overload;
function ObjectToJson(aObject : TObject; aIndent : Boolean = False): string;
end;
PPByte = ^PByte;
resourcestring
cNotSupportedDataType = 'Not supported "%s" data type "%s"';
cNotSerializable = 'Object is not serializable';
implementation
{ TRTTIJson }
{$IFNDEF FPC}
function TRTTIJson.DeserializeDynArray(aTypeInfo: PTypeInfo; aObject: TObject; const aJsonArray: TJSONArray) : TValue;
var
rType: PTypeInfo;
len: NativeInt;
pArr: Pointer;
rItemValue: TValue;
i: Integer;
objClass: TClass;
ctx : TRttiContext;
json : TJSONObject;
rDynArray : TRttiDynamicArrayType;
propObj : TObject;
begin
if GetTypeData(aTypeInfo).DynArrElType = nil then Exit;
len := aJsonArray.Count;
rType := GetTypeData(aTypeInfo).DynArrElType^;
pArr := nil;
DynArraySetLength(pArr,aTypeInfo, 1, @len);
try
TValue.Make(@pArr,aTypeInfo, Result);
rDynArray := ctx.GetType(Result.TypeInfo) as TRTTIDynamicArrayType;
for i := 0 to aJsonArray.Count - 1 do
begin
rItemValue := nil;
case rType.Kind of
tkClass :
begin
if aJsonArray.Items[i] is TJSONObject then
begin
propObj := GetValue(PPByte(Result.GetReferenceToRawData)^ +rDynArray.ElementType.TypeSize * i, rDynArray.ElementType).AsObject;
if propObj = nil then
begin
objClass := rType.TypeData.ClassType;
rItemValue := DeserializeClass(objClass, TJSONObject(aJsonArray.Items[i]));
end
else
begin
DeserializeObject(propObj,TJSONObject(aJsonArray.Items[i]));
end;
end;
end;
tkRecord :
begin
json := TJSONObject(aJsonArray.Items[i]);
rItemValue := DeserializeRecord(GetValue(PPByte(Result.GetReferenceToRawData)^ +rDynArray.ElementType.TypeSize * i,
rDynArray.ElementType),aObject,json);
end;
tkMethod, tkPointer, tkClassRef ,tkInterface, tkProcedure :
begin
//skip these properties
end
else
begin
rItemValue := DeserializeType(aObject,rType.Kind,aTypeInfo,aJsonArray.Items[i].Value);
end;
end;
if not rItemValue.IsEmpty then Result.SetArrayElement(i,rItemValue);
end;
//aProperty.SetValue(aObject,rValue);
finally
DynArrayClear(pArr,aTypeInfo);
end;
end;
{$ELSE}
procedure TRTTIJson.DeserializeDynArray(aTypeInfo: PTypeInfo; const aPropertyName : string; aObject: TObject; const aJsonArray: TJSONArray);
var
rType: PTypeInfo;
len: NativeInt;
pArr: Pointer;
rItemValue: TValue;
i: Integer;
objClass: TClass;
propObj : TObject;
rValue : TValue;
begin
if GetTypeData(aTypeInfo).ElType2 = nil then Exit;
len := aJsonArray.Count;
rType := GetTypeData(aTypeInfo).ElType2;
pArr := nil;
DynArraySetLength(pArr,aTypeInfo, 1, @len);
try
TValue.Make(@pArr,aTypeInfo, rValue);
for i := 0 to aJsonArray.Count - 1 do
begin
rItemValue := nil;
case rType.Kind of
tkClass :
begin
if aJsonArray.Items[i] is TJSONObject then
begin
propObj := GetValue(PPByte(rValue.GetReferenceToRawData)^ +GetTypeData(aTypeInfo).elSize * i, GetTypeData(aTypeInfo).ElType2).AsObject;
if propObj = nil then
begin
objClass := GetTypeData(aTypeInfo).ClassType;
rItemValue := DeserializeClass(objClass, TJSONObject(aJsonArray.Items[i]));
end
else
begin
DeserializeObject(propObj,TJSONObject(aJsonArray.Items[i]));
end;
end;
end;
tkRecord :
begin
{json := TJSONObject(aJsonArray.Items[i]);
rItemValue := DeserializeRecord(GetValue(PPByte(Result.GetReferenceToRawData)^ +rDynArray.ElementType.TypeSize * i,
rDynArray.ElementType),aObject,json); }
end;
tkMethod, tkPointer, tkClassRef ,tkInterface, tkProcedure :
begin
//skip these properties
end
else
begin
rItemValue := DeserializeType(aObject,GetTypeData(aTypeInfo).ElType2.Kind,aPropertyName,aJsonArray.Items[i].Value);
end;
end;
if not rItemValue.IsEmpty then rValue.SetArrayElement(i,rItemValue);
end;
//aProperty.SetValue(aObject,rValue);
SetDynArrayProp(aObject,GetPropInfo(aObject,aPropertyName),pArr);
finally
DynArrayClear(pArr,aTypeInfo);
end;
end;
{$ENDIF}
{$IFNDEF FPC}
function TRTTIJson.DeserializeRecord(aRecord : TValue; aObject : TObject; const aJson : TJSONObject) : TValue;
var
ctx : TRttiContext;
rRec : TRttiRecordType;
rField : TRttiField;
rValue : TValue;
member : TJSONPair;
jArray : TJSONArray;
json : TJSONObject;
objClass : TClass;
propobj : TObject;
begin
rRec := ctx.GetType(aRecord.TypeInfo).AsRecord;
try
for rField in rRec.GetFields do
begin
rValue := nil;
member := TJSONPair(aJson.GetValue(rField.Name));
if member <> nil then
case rField.FieldType.TypeKind of
tkDynArray :
begin
jArray := TJSONObject.ParseJSONValue(member.ToJSON) as TJSONArray;
try
rValue := DeserializeDynArray(rField.FieldType.Handle,aObject,jArray);
finally
jArray.Free;
end;
end;
tkClass :
begin
//if (member.JsonValue is TJSONObject) then
begin
propobj := rField.GetValue(@aRecord).AsObject;
json := TJSONObject.ParseJSONValue(member.ToJson) as TJSONObject;
try
if propobj = nil then
begin
objClass := rField.FieldType.Handle^.TypeData.ClassType;// aProperty.PropertyType.Handle^.TypeData.ClassType;
rValue := DeserializeClass(objClass,json);
end
else
begin
DeserializeObject(propobj,json);
end;
finally
json.Free;
end;
end
end;
else
begin
rValue := DeserializeType(aObject,rField.FieldType.TypeKind,rField.FieldType.Handle,member.toJson);
end;
end;
if not rValue.IsEmpty then rField.SetValue(aRecord.GetReferenceToRawData,rValue);
end;
Result := aRecord;
finally
ctx.Free;
end;
end;
{$ENDIF}
constructor TRTTIJson.Create(aSerializeLevel: TSerializeLevel);
begin
fSerializeLevel := aSerializeLevel;
end;
function TRTTIJson.DeserializeClass(aType: TClass; const aJson: TJSONObject): TObject;
begin
Result := nil;
if (aJson = nil) or (aJson.Count = 0) then Exit;
Result := aType.Create;
try
Result := DeserializeObject(Result,aJson);
except
on E : Exception do
begin
Result.Free;
raise EJsonDeserializeError.CreateFmt('Deserialize error class "%s" : %s',[aType.ClassName,e.Message]);
end;
end;
end;
function TRTTIJson.DeserializeObject(aObject: TObject; const aJson: TJSONObject): TObject;
var
ctx: TRttiContext;
rType: TRttiType;
rProp: TRttiProperty;
{$IFNDEF FPC}
attr: TCustomAttribute;
{$ENDIF}
propertyname : string;
begin
Result := aObject;
if (aJson = nil) or (aJson.Count = 0) or (Result = nil) then Exit;
//if IsGenericList(aObject) then
//begin
// Result := DeserializeList(Result,aObject.ClassName,aJson);
// Exit;
//end;
try
rType := ctx.GetType(aObject.ClassInfo);
try
for rProp in rType.GetProperties do
begin
{$IFNDEF FPC}
if ((fSerializeLevel = slPublicProperty) and (rProp.PropertyType.IsPublicType))
or ((fSerializeLevel = slPublishedProperty) and ((IsPublishedProp(aObject,rProp.Name)) or (rProp.Name = 'List'))) then
{$ENDIF}
begin
if ((rProp.IsWritable) or (rProp.Name = 'List')) and (IsAllowedProperty(aObject,rProp.Name)) then
begin
propertyname := rProp.Name;
{$IFNDEF FPC}
for attr in rProp.GetAttributes do if attr is TCustomNameProperty then propertyname := TCustomNameProperty(attr).Name;
if rProp.Name = 'List' then
begin
Result := DeserializeList(Result,propertyname,aJson);
end
else
{$ENDIF}
Result := DeserializeProperty(Result,propertyname,rProp,aJson);
end;
end;
end;
finally
ctx.Free;
end;
except
on E : Exception do
begin
Result.Free;
raise EJsonDeserializeError.CreateFmt('Deserialize error for object "%s" : %s',[aObject.ClassName,e.Message]);
end;
end;
end;
{$IFNDEF FPC}
function TRTTIJson.DeserializeList(aObject: TObject; const aName : string; const aJson: TJSONObject) : TObject;
var
ctx : TRttiContext;
rType : TRttiType;
rfield : TRttiField;
jarray : TJSONArray;
member : TJSONPair;
rvalue : TValue;
i : Integer;
rProp : TRttiProperty;
begin
Result := aObject;
member := TJSONPair(aJson.GetValue(aName));
rType := ctx.GetType(aObject.ClassInfo);
try
rProp := rType.GetProperty('List');
if rProp = nil then Exit;
finally
ctx.Free;
end;
jArray := TJSONObject.ParseJSONValue(member.ToJSON) as TJSONArray;
try
rvalue := DeserializeDynArray(rProp.PropertyType.Handle,Result,jArray);
i := jarray.Count;
finally
jArray.Free;
end;
if not rValue.IsEmpty then
begin
for rfield in rType.GetFields do
begin
if rfield.Name = 'FOwnsObjects' then rfield.SetValue(aObject,True);
//if rfield.Name = 'FCount' then rfield.SetValue(aObject,i);
if rfield.Name = 'FItems' then
begin
//if TList(aObject) <> nil then TList(aObject).Clear;
//rfield.GetValue(aObject).AsObject.Free;// aValue.GetReferenceToRawData)
rfield.SetValue(aObject,rValue);// .SetDynArrayProp(aObject,'fItems',Result);
Break;
end;
end;
rProp := rType.GetProperty('Count');
rProp.SetValue(aObject,i);
end;
end;
{$ENDIF}
function TRTTIJson.DeserializeProperty(aObject : TObject; const aName : string; aProperty : TRttiProperty; const aJson : TJSONObject) : TObject;
var
rValue : TValue;
{$IFNDEF FPC}
member : TJSONPair;
{$ELSE}
member : TJsonObject;
{$ENDIF}
objClass: TClass;
jArray : TJSONArray;
json : TJSONObject;
begin
Result := aObject;
rValue := nil;
{$IFNDEF FPC}
member := TJSONPair(aJson.GetValue(aName));
{$ELSE}
member := TJsonObject(aJson.Find(aName));
{$ENDIF}
if member <> nil then
begin
case aProperty.PropertyType.TypeKind of
tkDynArray :
begin
jArray := TJSONObject.ParseJSONValue(member.ToJSON) as TJSONArray;
try
{$IFNDEF FPC}
aProperty.SetValue(aObject,DeserializeDynArray(aProperty.PropertyType.Handle,Result,jArray));
{$ELSE}
DeserializeDynArray(aProperty.PropertyType.Handle,aName,Result,jArray);
{$ENDIF}
Exit;
finally
jArray.Free;
end;
end;
tkClass :
begin
//if (member.JsonValue is TJSONObject) then
begin
json := TJsonObject(TJSONObject.ParseJSONValue(member.ToJson));
try
if aProperty.GetValue(aObject).AsObject = nil then
begin
{$IFNDEF FPC}
objClass := aProperty.PropertyType.Handle^.TypeData.ClassType;
rValue := DeserializeClass(objClass,json);
{$ELSE}
objClass := GetObjectPropClass(aObject,aName);
//objClass := GetTypeData(aProperty.PropertyType.Handle)^.ClassType;
rValue := DeserializeClass(objClass,json);
SetObjectProp(aObject,aName,rValue.AsObject);
Exit;
{$ENDIF}
end
else
begin
rValue := DeserializeObject(aProperty.GetValue(aObject).AsObject,json);
Exit;
end;
finally
json.Free;
end;
end
end;
{$IFNDEF FPC}
tkRecord :
begin
json := TJSONObject.ParseJSONValue(member.ToJson) as TJSONObject;
try
rValue := DeserializeRecord(aProperty.GetValue(aObject),aObject,json);
finally
json.Free;
end;
end;
{$ENDIF}
else
begin
{$IFNDEF FPC}
//avoid return unicode escaped chars if string
if aProperty.PropertyType.TypeKind in [tkString, tkLString, tkWString, tkUString] then rValue := DeserializeType(aObject,aProperty.PropertyType.TypeKind,aProperty.GetValue(aObject).TypeInfo,member.JsonString.ToString)
else rValue := DeserializeType(aObject,aProperty.PropertyType.TypeKind,aProperty.GetValue(aObject).TypeInfo,member.ToJSON);
{$ELSE}
rValue := DeserializeType(aObject,aProperty.PropertyType.TypeKind,aName,member.ToJSON);
if not rValue.IsEmpty then SetPropertyValue(aObject,aName,rValue);
{$ENDIF}
end;
end;
{$IFNDEF FPC}
if not rValue.IsEmpty then aProperty.SetValue(Result,rValue);
{$ENDIF}
end;
end;
{$IFNDEF FPC}
function TRTTIJson.DeserializeType(aObject : TObject; aType : TTypeKind; aTypeInfo : PTypeInfo; const aValue: string) : TValue;
var
i : Integer;
value : string;
fsettings : TFormatSettings;
begin
try
value := AnsiDequotedStr(aValue,'"');
case aType of
tkString, tkLString, tkWString, tkUString :
begin
Result := value;
end;
tkChar, tkWChar :
begin
Result := value;
end;
tkInteger :
begin
Result := StrToInt(value);
end;
tkInt64 :
begin
Result := StrToInt64(value);
end;
tkFloat :
begin
if aTypeInfo = TypeInfo(TDateTime) then
begin
Result := JsonDateToDateTime(value);
end
else if aTypeInfo = TypeInfo(TDate) then
begin
Result := StrToDate(value);
end
else if aTypeInfo = TypeInfo(TTime) then
begin
Result := StrToTime(value);
end
else
begin
fsettings := TFormatSettings.Create;
Result := StrToFloat(StringReplace(value,'.',fsettings.DecimalSeparator,[]));
end;
end;
tkEnumeration :
begin
if aTypeInfo = System.TypeInfo(Boolean) then
begin
Result := StrToBool(value);
end
else
begin
TValue.Make(GetEnumValue(aTypeInfo,value),aTypeInfo, Result);
end;
end;
tkSet :
begin
i := StringToSet(aTypeInfo,value);
TValue.Make(@i,aTypeInfo,Result);
end;
else
begin
//raise EclJsonSerializerError.Create('Not supported data type!');
end;
end;
except
on E : Exception do
begin
raise EJsonDeserializeError.CreateFmt('Deserialize error type "%s.%s" : %s',[aObject.ClassName,GetTypeName(aTypeInfo),e.Message]);
end;
end;
end;
{$ELSE}
function TRTTIJson.DeserializeType(aObject : TObject; aType : TTypeKind; const aPropertyName, aValue: string) : TValue;
var
value : string;
propinfo : PPropInfo;
fsettings : TFormatSettings;
begin
try
value := AnsiDequotedStr(aValue,'"');
if value = '' then
begin
Result := nil;
Exit;
end;
propinfo := GetPropInfo(aObject,aPropertyName);
//case propinfo.PropType.Kind of
case aType of
tkString, tkLString, tkWString, tkUString, tkAString :
begin
Result := value;
//SetStrProp(aObject,propinfo,value);
end;
tkChar, tkWChar :
begin
Result := value;
end;
tkInteger :
begin
Result := StrToInt(value);
end;
tkInt64 :
begin
Result := StrToInt64(value);
end;
tkFloat :
begin
if propinfo.PropType = TypeInfo(TDateTime) then
begin
Result := JsonDateToDateTime(value);
end
else if propinfo.PropType = TypeInfo(TDate) then
begin
Result := StrToDate(value);
end
else if propinfo.PropType = TypeInfo(TTime) then
begin
Result := StrToTime(value);
end
else
begin
fsettings := DefaultFormatSettings;
Result := StrToFloat(StringReplace(value,'.',fsettings.DecimalSeparator,[]));
end;
end;
tkEnumeration:
begin
Result := value;
end;
tkBool :
begin
Result := StrToBool(value);
end;
tkSet :
begin
Result := value;
end;
else
begin
//raise EclJsonSerializerError.Create('Not supported data type!');
end;
end;
//if not Result.IsEmpty then SetPropertyValue(aObject,propinfo,Result);
except
on E : Exception do
begin
raise EJsonDeserializeError.CreateFmt('Deserialize error type "%s" : %s',[aObject.ClassName,e.Message]);
end;
end;
end;
{$ENDIF}
function TRTTIJson.IsAllowedProperty(aObject : TObject; const aPropertyName : string) : Boolean;
var
propname : string;
cname : string;
begin
Result := True;
propname := aPropertyName.ToLower;
if IsGenericList(aObject) then
begin
if (propname = 'capacity') or (propname = 'count') or (propname = 'ownsobjects') then Result := False;
end
else if (propname = 'refcount') then Result := False;
end;
function TRTTIJson.IsGenericList(aObject : TObject) : Boolean;
var
cname : string;
begin
cname := aObject.ClassName;
Result := (cname.StartsWith('TObjectList')) or (cname.StartsWith('TList'));
end;
function TRTTIJson.GetPropertyValue(Instance : TObject; const PropertyName : string) : TValue;
var
pinfo : PPropInfo;
begin
Result := nil;
pinfo := GetPropInfo(Instance,PropertyName);
case pinfo.PropType^.Kind of
tkInteger : Result := GetOrdProp(Instance,pinfo);
tkInt64 : Result := GetInt64Prop(Instance,PropertyName);
tkFloat : Result := GetFloatProp(Instance,PropertyName);
tkChar : Result := Char(GetOrdProp(Instance,PropertyName));
{$IFDEF FPC}
tkWString : Result := GetWideStrProp(Instance,PropertyName);
tkSString,
tkAString,
{$ELSE}
tkWString,
{$ENDIF}
tkLString : Result := GetStrProp(Instance,pinfo);
{$IFDEF FPC}
tkEnumeration : Result := GetEnumName(pinfo.PropType,GetOrdProp(Instance,PropertyName));
{$ELSE}
tkEnumeration : Result := GetEnumName(@pinfo.PropType,GetOrdProp(Instance,PropertyName));
{$ENDIF}
tkSet : Result := GetSetProp(Instance,pinfo,True);
{$IFNDEF FPC}
tkClass :
{$ELSE}
tkBool : Result := Boolean(GetOrdProp(Instance,pinfo));
tkObject :
{$ENDIF} Result := GetObjectProp(Instance,pinfo);
tkDynArray : Result := GetDynArrayProp(Instance,pinfo);
end;
end;
procedure TRTTIJson.SetPropertyValue(Instance : TObject; const PropertyName : string; aValue : TValue);
var
pinfo : PPropInfo;
begin
pinfo := GetPropInfo(Instance,PropertyName);
SetPropertyValue(Instance,pinfo,aValue);
end;
procedure TRTTIJson.SetPropertyValue(Instance : TObject; aPropInfo : PPropInfo; aValue : TValue);
begin
case aPropInfo.PropType^.Kind of
tkInteger : SetOrdProp(Instance,aPropInfo,aValue.AsInteger);
tkInt64 : SetInt64Prop(Instance,aPropInfo,aValue.AsInt64);
tkFloat : SetFloatProp(Instance,aPropInfo,aValue.AsExtended);
tkChar : SetOrdProp(Instance,aPropInfo,aValue.AsOrdinal);
{$IFDEF FPC}
tkWString : SetWideStrProp(Instance,aPropInfo,aValue.AsString);
tkSString,
tkAString,
{$ELSE}
tkWString,
{$ENDIF}
tkLString : SetStrProp(Instance,aPropInfo,aValue.AsString);
{$IFDEF FPC}
tkBool : SetOrdProp(Instance,aPropInfo,aValue.AsOrdinal);
tkSet : LoadSetProperty(Instance,aPropInfo,aValue.AsString);
{$ENDIF}
tkEnumeration : SetEnumProp(Instance,aPropInfo,aValue.AsString);
{$IFNDEF FPC}
tkClass :
{$ELSE}
tkObject :
{$ENDIF} SetObjectProp(Instance,aPropInfo,aValue.AsObject);
end;
end;
{$IFDEF FPC}
procedure TRTTIJson.LoadSetProperty(aInstance : TObject; aPropInfo: PPropInfo; const aValue: string);
type
TCardinalSet = set of 0..SizeOf(Cardinal) * 8 - 1;
const
Delims = [' ', ',', '[', ']'];
var
TypeInfo: PTypeInfo;
W: Cardinal;
I, N: Integer;
Count: Integer;
EnumName: string;
begin
W := 0;
TypeInfo := GetTypeData(GetPropType(aPropInfo))^.CompType;
Count := WordCount(aValue, Delims);
for N := 1 to Count do
begin
EnumName := ExtractWord(N, aValue, Delims);
try
I := GetEnumValue(TypeInfo, EnumName);
if I >= 0 then Include(TCardinalSet(W),I);
except
end;
end;
SetOrdProp(aInstance,aPropInfo,W);
end;
{$ENDIF}
function TRTTIJson.Serialize(aObject: TObject): TJSONObject;
var
ctx: TRttiContext;
{$IFNDEF FPC}
attr : TCustomAttribute;
comment : string;
{$ENDIF}
rType: TRttiType;
rProp: TRttiProperty;
jpair : TJSONPair;
ExcludeSerialize : Boolean;
propertyname : string;
//listtype : TRttiType;
//listprop : TRttiProperty;
//listvalue : TValue;
begin
if (aObject = nil) then
begin
Result := nil;
Exit;
end;
Result := TJSONObject.Create;
try
rType := ctx.GetType(aObject.ClassInfo);
try
//s := rType.ToString;
for rProp in rType.GetProperties do
begin
ExcludeSerialize := False;
propertyname := rProp.Name;
{$IFNDEF FPC}
comment := '';
for attr in rProp.GetAttributes do
begin
if attr is TNotSerializableProperty then ExcludeSerialize := True
else if attr is TCommentProperty then comment := TCommentProperty(attr).Comment
else if attr is TCustomNameProperty then propertyname := TCustomNameProperty(attr).Name;
end;
if ((fSerializeLevel = slPublicProperty) and (rProp.PropertyType.IsPublicType))
or ((fSerializeLevel = slPublishedProperty) and ((IsPublishedProp(aObject,rProp.Name)) or (rProp.Name = 'List'))) then
{$ENDIF}
begin
if (IsAllowedProperty(aObject,propertyname)) and (not ExcludeSerialize) then
begin
//add comment as pair
{$IFNDEF FPC}
if comment <> '' then Result.AddPair(TJSONPair.Create('#Comment#->'+propertyname,Comment));
{$ENDIF}
//listtype := ctx.GetType(rProp.GetValue(aObject).TypeInfo);
//if (listtype.ClassParent.ClassName.StartsWith('TObjectList')) then
//begin
// jpair := Serialize(propertyname,rProp.GetValue(aObject));
// Result.AddPair(propertyname,(jpair.JsonValue as TJSONObject).GetValue('List').Clone as TJsonValue);
// jpair.Free;
//listtype := ctx.GetType(rProp.GetValue(aObject).AsObject.ClassInfo);
//listprop := listtype.GetProperty('List');
//listvalue := listprop.GetValue(aObject);
//jpair := Serialize('Groups',listvalue);
//if jpair <> nil then Result.AddPair(jpair)
// else jpair.Free;
//Exit;
//end
//else
begin
{$IFNDEF FPC}
jpair := Serialize(propertyname,rProp.GetValue(aObject));
{$ELSE}
jpair := Serialize(aObject,rProp.PropertyType.TypeKind,propertyname);
{$ENDIF}
//s := jpair.JsonValue.ToString;
if jpair <> nil then
begin
Result.AddPair(jpair);
end
else jpair.Free;
end;
//Result.AddPair(Serialize(rProp.Name,rProp.GetValue(aObject)));
//s := Result.ToJSON;
end;
end;
end;
finally
ctx.Free;
end;
except
on E : Exception do
begin
Result.Free;
raise EJsonSerializeError.CreateFmt('Serialize error object "%s" : %s',[aObject.ClassName,e.Message]);
end;
end;
end;
function TRTTIJson.GetValue(aAddr: Pointer; aType: TRTTIType): TValue;
begin
TValue.Make(aAddr,aType.Handle,Result);
end;
function TRTTIJson.GetValue(aAddr: Pointer; aTypeInfo: PTypeInfo): TValue;
begin
TValue.Make(aAddr,aTypeInfo,Result);
end;
{$IFNDEF FPC}
function TRTTIJson.Serialize(const aName : string; aValue : TValue) : TJSONPair;
var
ctx: TRttiContext;
rRec : TRttiRecordType;
rField : TRttiField;
rDynArray : TRTTIDynamicArrayType;
json : TJSONObject;
jArray : TJSONArray;
jPair : TJSONPair;
jValue : TJSONValue;
i : Integer;
s : string;
begin
Result := TJSONPair.Create(aName,nil);
//Result.JsonString := TJSONString(aName);
try
case avalue.Kind of
tkDynArray :
begin
jArray := TJSONArray.Create;
rDynArray := ctx.GetType(aValue.TypeInfo) as TRTTIDynamicArrayType;
try
for i := 0 to aValue.GetArrayLength - 1 do
begin
jPair := Serialize(aName,GetValue(PPByte(aValue.GetReferenceToRawData)^ + rDynArray.ElementType.TypeSize * i, rDynArray.ElementType));
try
//jValue := TJsonValue(jPair.JsonValue.Clone);
jValue := jPair.JsonValue;
jArray.AddElement(jValue);
jPair.JsonValue.Owned := False;
finally
jPair.Free;
jValue.Owned := True;
end;
end;
Result.JsonValue := jArray;
finally
ctx.Free;