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Quick.Json.Serializer.pas
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Quick.Json.Serializer.pas
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{ ***************************************************************************
Copyright (c) 2015-2020 Kike Pérez
Unit : Quick.JSON.Serializer
Description : Json Serializer
Author : Kike Pérez
Version : 1.12
Created : 21/05/2018
Modified : 16/06/2020
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;
{$i QuickLib.inc}
interface
uses
{$IFDEF DEBUG_SERIALIZER}
Quick.Debug.Utils,
{$ENDIF}
Classes,
SysUtils,
Rtti,
TypInfo,
Quick.Serializer.Intf,
{$IFDEF FPC}
rttiutils,
fpjson,
jsonparser,
strUtils,
//jsonreader,
//fpjsonrtti,
Quick.Json.fpc.Compatibility,
{$ELSE}
{$IFDEF DELPHIXE7_UP}
System.Json,
{$ELSE}
Data.DBXJSON,
{$ENDIF}
{$IFDEF DELPHIRX10_UP}
{$ENDIF}
Variants,
{$ENDIF}
Generics.Collections,
Quick.RTTI.Utils,
DateUtils,
Quick.Commons,
Quick.JSON.Utils;
type
IJsonSerializer = ISerializer;
EJsonSerializeError = class(Exception);
EJsonDeserializeError = class(Exception);
{$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;
{$IFNDEF DELPHIXE7_UP}
TJSONArrayHelper = class helper for Data.DBXJson.TJSONArray
private
function GetItem(aValue : Integer) : TJSONValue;
public
function Count : Integer;
property Items[index : Integer] : TJSONValue read GetItem;
procedure SetElements(aElements : TList<TJSONValue>);
end;
TJSONValueHelper = class helper for Data.DBXJson.TJSONValue
public
function ToJson : string;
end;
TJSONObjectHelper = class helper for Data.DBXJson.TJSONObject
private
function GetPair(aValue : Integer) : TJSONPair;
public
function Count : Integer;
function GetValue(const aName : string) : TJSONValue;
property Pairs[index : Integer] : TJSONPair read GetPair;
end;
{$ENDIF}
{$ENDIF}
TSerializeLevel = (slPublicProperty, slPublishedProperty);
TRTTIJson = class
type
TGenericListType = (gtNone, gtList, gtObjectList);
private
fSerializeLevel : TSerializeLevel;
fUseEnumNames : Boolean;
fUseJsonCaseSense : Boolean;
function GetValue(aAddr: Pointer; aType: TRTTIType): TValue; overload;
function GetValue(aAddr: Pointer; aTypeInfo: PTypeInfo): TValue; overload;
function IsAllowedProperty(aObject : TObject; const aPropertyName : string) : Boolean;
function GetPropertyValue(Instance : TObject; const PropertyName : string) : TValue;
function GetPropertyValueFromObject(Instance : TObject; const PropertyName : string) : TValue;
{$IFNDEF FPC}
function GetFieldValueFromRecord(const aValue : TValue; const FieldName : string) : TValue;
{$ENDIF}
procedure SetPropertyValue(Instance : TObject; aPropInfo : PPropInfo; aValue : TValue); overload;
procedure SetPropertyValue(Instance : TObject; const PropertyName : string; aValue : TValue); overload;
{$IFDEF FPC}
function FloatProperty(aObject : TObject; aPropInfo: PPropInfo): string;
function GetPropType(aPropInfo: PPropInfo): PTypeInfo;
procedure LoadSetProperty(aInstance : TObject; aPropInfo: PPropInfo; const aValue: string);
{$ENDIF}
{$IFNDEF FPC}
function CreateInstance(aClass: TClass): TValue; overload;
function CreateInstance(aType: TRttiType): TValue; overload;
{$ENDIF}
public
constructor Create(aSerializeLevel : TSerializeLevel; aUseEnumNames : Boolean = True);
property UseEnumNames : Boolean read fUseEnumNames write fUseEnumNames;
property UseJsonCaseSense : Boolean read fUseJsonCaseSense write fUseJsonCaseSense;
function GetJsonPairValueByName(aJson : TJSONObject; const aName : string) : TJsonValue;
function GetJsonPairByName(aJson : TJSONObject; const aName : string) : TJSONPair;
function IsGenericList(aObject : TObject) : Boolean;
function IsGenericXArray(const aClassName : string) : Boolean;
function GetGenericListType(aObject : TObject) : TGenericListType;
//serialize methods
function SerializeValue(const aValue : TValue) : TJSONValue;
function SerializeObject(aObject : TObject) : TJSONObject; overload;
{$IFNDEF FPC}
function SerializeDynArray(const aValue: TValue; aMaxElements : Integer = -1) : TJsonArray;
function SerializeRecord(const aValue : TValue) : TJSONValue;
{$ELSE}
function SerializeObject(aObject : TObject; aType : TTypeKind; const aPropertyName : string) : TJSONPair;
{$ENDIF}
//deserialize methods
function DeserializeClass(aType : TClass; const aJson : TJSONObject) : TObject;
function DeserializeObject(aObject : TObject; const aJson : TJSONObject) : TObject; overload;
function DeserializeProperty(aObject : TObject; const aName : string; aProperty : TRttiProperty; const aJson : TJSONObject) : TObject; overload;
{$IFNDEF FPC}
function DeserializeType(aObject : TObject; aType : TTypeKind; aTypeInfo : PTypeInfo; const aValue: string) : TValue;
function DeserializeDynArray(aTypeInfo : PTypeInfo; aObject : TObject; const aJsonArray: TJSONArray) : TValue;
function DeserializeRecord(const aRecord : TValue; aObject : TObject; const aJson : TJSONObject) : TValue;
function DeserializeList(aObject: TObject; const aName : string; const aJson: TJSONObject) : TObject;
procedure DeserializeXArray(Instance : TObject; aRecord : TValue; aProperty : TRttiProperty; const aPropertyName : string; aJson : TJsonObject);
{$ELSE}
function DeserializeType(aObject : TObject; aType : TTypeKind; const aPropertyName, aValue: string) : TValue;
procedure DeserializeDynArray(aTypeInfo: PTypeInfo; const aPropertyName : string; aObject: TObject; const aJsonArray: TJSONArray);
{$ENDIF}
end;
TJsonSerializer = class(TInterfacedObject,IJsonSerializer)
strict private
fSerializeLevel : TSerializeLevel;
fUseEnumNames : Boolean;
fUseJsonCaseSense : Boolean;
fRTTIJson : TRTTIJson;
private
procedure SetUseEnumNames(const Value: Boolean);
procedure SetUseJsonCaseSense(const Value: Boolean);
procedure SetSerializeLevel(const Value: TSerializeLevel);
public
constructor Create(aSerializeLevel: TSerializeLevel; aUseEnumNames : Boolean = True);
destructor Destroy; override;
property SerializeLevel : TSerializeLevel read fSerializeLevel write SetSerializeLevel;
property UseEnumNames : Boolean read fUseEnumNames write SetUseEnumNames;
property UseJsonCaseSense : Boolean read fUseJsonCaseSense write SetUseJsonCaseSense;
function JsonToObject(aType : TClass; const aJson: string) : TObject; overload;
function JsonToObject(aObject : TObject; const aJson: string) : TObject; overload;
function ObjectToJson(aObject : TObject; aIndent : Boolean = False): string;
function ObjectToJsonString(aObject : TObject; aIndent : Boolean = False): string;
function ValueToJson(const aValue : TValue; aIndent : Boolean = False) : string;
function ValueToJsonString(const aValue : TValue; aIndent : Boolean = False) : string;
function ArrayToJson<T>(aArray : TArray<T>; aIndent : Boolean = False) : string;
function ArrayToJsonString<T>(aArray : TArray<T>; aIndent : Boolean = False) : string;
{$IFNDEF FPC}
function JsonToArray<T>(const aJson : string) : TArray<T>;
function JsonToValue(const aJson: string): TValue;
{$ENDIF}
end;
EJsonSerializerError = class(Exception);
PPByte = ^PByte;
resourcestring
cNotSupportedDataType = 'Not supported data type "%s"';
cSerializeObjectError = 'Serialize object "%s" error: %s';
cSerializePropertyError = 'Property "%s" ("%s")';
cNotSerializable = 'Object is not serializable';
cNotValidJson = 'Not a valid Json';
implementation
{ TRTTIJson }
{$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;
if not assigned(aJsonArray) 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}
{$IFNDEF FPC}
function TRTTIJson.DeserializeRecord(const aRecord : TValue; aObject : TObject; const aJson : TJSONObject) : TValue;
var
ctx : TRttiContext;
rRec : TRttiRecordType;
rField : TRttiField;
rValue : TValue;
member : TJsonValue;
jArray : TJSONArray;
json : TJSONObject;
objClass : TClass;
propobj : TObject;
begin
rRec := ctx.GetType(aRecord.TypeInfo).AsRecord;
for rField in rRec.GetFields do
begin
rValue := nil;
//member := TJSONPair(aJson.GetValue(rField.Name));
member := GetJsonPairValueByName(aJson,rField.Name);
if member <> nil then
case rField.FieldType.TypeKind of
tkDynArray :
begin
jArray := TJSONObject.ParseJSONValue(member.ToJSON) as TJSONArray;
try
rValue := DeserializeDynArray(rField.FieldType.Handle,aObject,jArray);
finally
jArray.Free;
end;
end;
tkClass :
begin
//if (member.JsonValue is TJSONObject) then
begin
propobj := rField.GetValue(@aRecord).AsObject;
json := TJSONObject.ParseJSONValue(member.ToJson) as TJSONObject;
try
if propobj = nil then
begin
objClass := rField.FieldType.Handle^.TypeData.ClassType;// aProperty.PropertyType.Handle^.TypeData.ClassType;
rValue := DeserializeClass(objClass,json);
end
else
begin
DeserializeObject(propobj,json);
end;
finally
json.Free;
end;
end
end;
tkRecord :
begin
json := TJSONObject.ParseJSONValue(member.ToJson) as TJSONObject;
try
rValue := DeserializeRecord(rField.GetValue(aRecord.GetReferenceToRawData),aObject,json);
finally
json.Free;
end;
end
else
begin
//rValue := DeserializeType(aObject,rField.FieldType.TypeKind,rField.FieldType.Handle,member.ToJson);
//avoid return unicode escaped chars if string
if rField.FieldType.TypeKind in [tkString, tkLString, tkWString, tkUString] then
{$IFDEF DELPHIRX10_UP}
rValue := DeserializeType(aObject,rField.FieldType.TypeKind,rField.FieldType.Handle,TJsonValue(member).value)
{$ELSE}
rValue := DeserializeType(aObject,rField.FieldType.TypeKind,rField.FieldType.Handle,member.Value)
{$ENDIF}
else 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;
end;
{$ENDIF}
constructor TRTTIJson.Create(aSerializeLevel : TSerializeLevel; aUseEnumNames : Boolean = True);
begin
fSerializeLevel := aSerializeLevel;
fUseEnumNames := aUseEnumNames;
fUseJsonCaseSense := False;
end;
{$IFNDEF FPC}
function TRTTIJson.CreateInstance(aClass: TClass): TValue;
var
ctx : TRttiContext;
rtype : TRttiType;
begin
Result := nil;
rtype := ctx.GetType(aClass);
Result := CreateInstance(rtype);
end;
{$ENDIF}
{$IFNDEF FPC}
function TRTTIJson.CreateInstance(aType: TRttiType): TValue;
var
rmethod : TRttiMethod;
begin
Result := nil;
if atype = nil then Exit;
for rmethod in TRttiInstanceType(atype).GetMethods do
begin
if rmethod.IsConstructor then
begin
//create if don't have parameters
if Length(rmethod.GetParameters) = 0 then
begin
Result := rmethod.Invoke(TRttiInstanceType(atype).MetaclassType,[]);
Break;
end;
end;
end;
end;
{$ENDIF}
function TRTTIJson.DeserializeClass(aType: TClass; const aJson: TJSONObject): TObject;
begin
Result := nil;
if (aJson = nil) or ((aJson as TJSONValue) is TJSONNull) or (aJson.Count = 0) then Exit;
{$IFNDEF FPC}
Result := CreateInstance(aType).AsObject;
{$ELSE}
Result := aType.Create;
{$ENDIF}
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;
{$IFNDEF FPC}
attr: TCustomAttribute;
propvalue : TValue;
{$ENDIF}
propertyname : string;
begin
Result := aObject;
if (aJson = nil) or ((aJson as TJSONValue) is TJSONNull) or (aJson.Count = 0) or (Result = nil) then Exit;
try
//if generic list
{$IFNDEF FPC}
if IsGenericList(aObject) then
begin
DeserializeList(aObject,'List',aJson);
Exit;
end;
{$ENDIF}
//if standard object
rType := ctx.GetType(aObject.ClassInfo);
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;
{$IFNDEF FPC}
for attr in rProp.GetAttributes do if attr is TCustomNameProperty then propertyname := TCustomNameProperty(attr).Name;
propvalue := rProp.GetValue(aObject);
if rProp.Name = 'List' then
begin
Result := DeserializeList(Result,propertyname,aJson);
end
else if propvalue.IsObject then
begin
if propvalue.AsObject = nil then
begin
propvalue := CreateInstance(rProp.PropertyType);
rProp.SetValue(aObject,propvalue);
end;
if IsGenericList(propvalue.AsObject) then DeserializeList(propvalue.AsObject,'List',TJSONObject(aJson.GetValue(propertyname)))
else Result := DeserializeProperty(Result,propertyname,rProp,aJson);
end
else if IsGenericXArray(propvalue{$IFNDEF NEXTGEN}.TypeInfo.Name{$ELSE}.TypeInfo.NameFld.ToString{$ENDIF}) then
begin
DeserializeXArray(Result,propvalue,rProp,propertyname,aJson);
end
else
{$ENDIF}
Result := DeserializeProperty(Result,propertyname,rProp,aJson);
end;
end;
end;
except
on E : Exception do
begin
Result.Free;
raise EJsonDeserializeError.CreateFmt('Deserialize error for object "%s" : %s',[aObject.ClassName,e.Message]);
end;
end;
end;
{$IFNDEF FPC}
function TRTTIJson.DeserializeList(aObject: TObject; const aName : string; const aJson: TJSONObject) : TObject;
var
ctx : TRttiContext;
rType : TRttiType;
jarray : TJSONArray;
member : TJsonValue;
rvalue : TValue;
i : Integer;
n : Integer;
rProp : TRttiProperty;
{$IFNDEF DELPHIRX10_UP}
rfield : TRttiField;
{$ENDIF}
genericType : TGenericListType;
begin
Result := aObject;
rType := ctx.GetType(aObject.ClassInfo);
rProp := rType.GetProperty('List');
if (rProp = nil) or (aJson = nil) or (aJson.ClassType = TJSONNull) then Exit;
member := nil;
//check if exists List (denotes delphi json serialized) or not (normal json serialized)
if aJson.ClassType = TJSONObject then member := GetJsonPairValueByName(aJson,aName);
if member = nil then
begin
if aJson.ClassType <> TJSONArray then raise EJsonDeserializeError.CreateFmt('Not valid value for "%s" List',[aName]);
jArray := TJSONObject.ParseJSONValue(aJson.ToJSON) as TJSONArray;
end
else
begin
if member.ClassType <> TJSONArray then raise EJsonDeserializeError.CreateFmt('Not valid value for "%s" List',[aName]);
jArray := TJSONObject.ParseJSONValue(member.ToJSON) as TJSONArray;
end;
try
rvalue := DeserializeDynArray(rProp.PropertyType.Handle,Result,jArray);
//i := jarray.Count;
finally
jArray.Free;
end;
if not rValue.IsEmpty then
begin
{$IFDEF DELPHIRX10_UP}
if (TObjectList<TObject>(aObject) <> nil) and (rvalue.IsArray) then
begin
genericType := GetGenericListType(aObject);
if genericType = TGenericListType.gtObjectList then TObjectList<TObject>(aObject).Clear
else TList<TObject>(aObject).Clear;
n := rvalue.GetArrayLength - 1;
for i := 0 to n do
begin
if genericType = TGenericListType.gtObjectList then TObjectList<TObject>(aObject).Add(rvalue.GetArrayElement(i).AsObject)
else TList<TObject>(aObject).Add(rvalue.GetArrayElement(i).AsObject);
end;
end;
{$ELSE}
n := 0;
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,n);
{$ENDIF}
end;
end;
{$ENDIF}
{$IFNDEF FPC}
procedure TRTTIJson.DeserializeXArray(Instance : TObject; aRecord : TValue; aProperty : TRttiProperty; const aPropertyName : string; aJson : TJsonObject);
var
ctx : TRttiContext;
rRec : TRttiRecordType;
rfield : TRttiField;
rValue : TValue;
member : TJsonValue;
jArray : TJSONArray;
begin
rRec := ctx.GetType(aRecord.TypeInfo).AsRecord;
rfield := rRec.GetField('fArray');
if rfield <> nil then
begin
rValue := nil;
//member := TJSONPair(aJson.GetValue(rField.Name));
member := GetJsonPairValueByName(aJson,aPropertyName);
if (member <> nil) and (rField.FieldType.TypeKind = tkDynArray) then
begin
jArray := TJSONObject.ParseJSONValue(member.ToJSON) as TJSONArray;
try
rValue := DeserializeDynArray(rField.FieldType.Handle,nil,jArray);
finally
jArray.Free;
end;
end;
end;
if not rValue.IsEmpty then rField.SetValue(aRecord.GetReferenceToRawData,rValue);
aProperty.SetValue(Instance,aRecord);
end;
{$ENDIF}
function TRTTIJson.DeserializeProperty(aObject : TObject; const aName : string; aProperty : TRttiProperty; const aJson : TJSONObject) : TObject;
var
rValue : TValue;
{$IFNDEF FPC}
member : TJsonValue;
{$ELSE}
member : TJsonObject;
{$ENDIF}
objClass: TClass;
jArray : TJSONArray;
json : TJSONObject;
begin
Result := aObject;
rValue := nil;
{$IFNDEF FPC}
//member := TJSONPair(aJson.GetValue(aName));
member := GetJsonPairValueByName(aJson,aName);
{$ELSE}
member := TJsonObject(aJson.Find(aName));
{$ENDIF}
if member <> nil then
begin
case aProperty.PropertyType.TypeKind of
tkDynArray :
begin
if member is TJSONNull then Exit;
{$IFNDEF FPC}
jArray := TJSONObject.ParseJSONValue(member.ToJSON) as TJSONArray;
{$ELSE}
jArray := TJSONArray(TJSONObject.ParseJSONValue(member.ToJSON));
{$ENDIF}
try
{$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
if aProperty.GetValue(aObject).TypeInfo = System.TypeInfo(TGUID) then
begin
rValue:=TValue.From<TGUID>(StringToGUID(member.ToJSON.DeQuotedString('"')));
end
else
begin
json := TJSONObject.ParseJSONValue(member.ToJson) as TJSONObject;
try
rValue := DeserializeRecord(aProperty.GetValue(aObject),aObject,json);
finally
json.Free;
end;
end;
end;
{$ENDIF}
else
begin
{$IFNDEF FPC}
//avoid return unicode escaped chars if string
if aProperty.PropertyType.TypeKind in [tkString, tkLString, tkWString, tkUString] then
{$IFDEF DELPHIRX10_UP}
rValue := DeserializeType(aObject,aProperty.PropertyType.TypeKind,aProperty.GetValue(aObject).TypeInfo,TJsonValue(member).value)
{$ELSE}
rValue := DeserializeType(aObject,aProperty.PropertyType.TypeKind,aProperty.GetValue(aObject).TypeInfo,member.Value)
{$ENDIF}
else rValue := DeserializeType(aObject,aProperty.PropertyType.TypeKind,aProperty.GetValue(aObject).TypeInfo,member.ToJSON);
{$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
if CompareText(value,'null') <> 0 then Result := JsonDateToDateTime(value);
end
else if aTypeInfo = TypeInfo(TDate) then
begin
if CompareText(value,'null') <> 0 then 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
//if fUseEnumNames then TValue.Make(GetEnumValue(aTypeInfo,value),aTypeInfo, Result)
// else TValue.Make(StrToInt(value),aTypeInfo, Result);
if not TryStrToInt(value,i) then TValue.Make(GetEnumValue(aTypeInfo,value),aTypeInfo, Result)
else TValue.Make(StrToInt(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;
{$ELSE}
function TRTTIJson.DeserializeType(aObject : TObject; aType : TTypeKind; const aPropertyName, aValue: string) : TValue;
var
value : string;
propinfo : PPropInfo;
fsettings : TFormatSettings;
begin
try
value := AnsiDequotedStr(aValue,'"');
if value = '' then
begin
Result := nil;
Exit;
end;
propinfo := GetPropInfo(aObject,aPropertyName);
//case propinfo.PropType.Kind of
case aType of
tkString, tkLString, tkWString, tkUString, tkAString :
begin
Result := value;
//SetStrProp(aObject,propinfo,value);
end;
tkChar, tkWChar :
begin
Result := value;
end;
tkInteger :
begin
Result := StrToInt(value);
end;
tkInt64 :
begin
Result := StrToInt64(value);
end;
tkFloat :
begin
if propinfo.PropType = TypeInfo(TDateTime) then
begin
if CompareText(value,'null') <> 0 then Result := JsonDateToDateTime(value);
end
else if propinfo.PropType = TypeInfo(TDate) then
begin
if CompareText(value,'null') <> 0 then Result := StrToDate(value);
end
else if propinfo.PropType = TypeInfo(TTime) then
begin
Result := StrToTime(value);
end
else
begin
fsettings := DefaultFormatSettings;
Result := StrToFloat(StringReplace(value,'.',fsettings.DecimalSeparator,[]));
end;
end;
tkEnumeration:
begin
Result := value;
end;
tkBool :
begin
Result := StrToBool(value);
end;
tkSet :
begin
Result := value;
end;
else
begin
//raise EclJsonSerializerError.Create('Not supported data type!');
end;
end;
//if not Result.IsEmpty then SetPropertyValue(aObject,propinfo,Result);
except
on E : Exception do
begin
raise EJsonDeserializeError.CreateFmt('Deserialize error type "%s" : %s',[aObject.ClassName,e.Message]);
end;
end;
end;
{$ENDIF}
function TRTTIJson.IsAllowedProperty(aObject : TObject; const aPropertyName : string) : Boolean;
var
propname : string;
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
if aObject = nil then Exit(False);
cname := aObject.ClassName;
Result := (cname.StartsWith('TObjectList')) or (cname.StartsWith('TList'));
end;
function TRTTIJson.GetGenericListType(aObject : TObject) : TGenericListType;
var
cname : string;
begin
if aObject = nil then Exit(TGenericListType.gtNone);
cname := aObject.ClassName;
if cname.StartsWith('TObjectList') then Result := TGenericListType.gtObjectList
else if cname.StartsWith('TList') then Result := TGenericListType.gtList
else Result := TGenericListType.gtNone;
end;
function TRTTIJson.IsGenericXArray(const aClassName : string) : Boolean;
begin
Result := aClassName.StartsWith('TXArray');
end;
function TRTTIJson.GetJsonPairValueByName(aJson: TJSONObject; const aName: string): TJsonValue;
var
candidate : TJSONPair;
i : Integer;
begin
if fUseJsonCaseSense then
begin
Result := aJson.GetValue(aName);