public override MList <T>?Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options, MList <T>?existingValue)
{
var existingMList = (IMListPrivate <T>?)existingValue;
var dic = existingMList == null ? new Dictionary <PrimaryKey, MList <T> .RowIdElement>() :
existingMList.InnerList.Where(a => a.RowId.HasValue).ToDictionary(a => a.RowId !.Value, a => a);
var newList = new List <MList <T> .RowIdElement>();
var tup = EntityJsonContext.CurrentPropertyRouteAndEntity !.Value;
var elementPr = tup.pr.Add("Item");
var rowIdType = GetRowIdTypeFromAttribute(tup.pr);
reader.Assert(JsonTokenType.StartArray);
reader.Read();
while (reader.TokenType == JsonTokenType.StartObject)
{
reader.Read();
reader.Assert(JsonTokenType.PropertyName);
if (reader.GetString() != "rowId")
{
throw new JsonException($"member 'rowId' expected in {reader.CurrentState}");
}
reader.Read();
var rowIdValue = reader.GetLiteralValue();
reader.Read();
reader.Assert(JsonTokenType.PropertyName);
if (reader.GetString() != "element")
{
throw new JsonException($"member 'element' expected in {reader.CurrentState}");
}
reader.Read();
using (EntityJsonConverterFactory.SetPath($"[{newList.Count}].element"))
{
if (rowIdValue != null && !rowIdValue.Equals(GraphExplorer.DummyRowId.Object))
{
var rowId = new PrimaryKey((IComparable)ReflectionTools.ChangeType(rowIdValue, rowIdType) !);
var oldValue = dic.TryGetS(rowId);
using (EntityJsonContext.SetCurrentPropertyRouteAndEntity((elementPr, tup.mod, rowId)))
{
if (oldValue == null)
{
T newValue = (T)converter.Read(ref reader, typeof(T), options) !;
newList.Add(new MList <T> .RowIdElement(newValue, rowId, null));
}
else
{
T newValue = converter is JsonConverterWithExisting <T> jcwe ?
(T)jcwe.Read(ref reader, typeof(T), options, oldValue.Value.Element !) ! :
(T)converter.Read(ref reader, typeof(T), options) !;
if (oldValue.Value.Element !.Equals(newValue))
{
newList.Add(new MList <T> .RowIdElement(newValue, rowId, oldValue.Value.OldIndex));
}
else
{
newList.Add(new MList <T> .RowIdElement(newValue));
}
}
}
}
public override Lite <T>?Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options, Lite <T>?existingValue)
{
if (reader.TokenType == JsonTokenType.Null)
{
return(null);
}
reader.Assert(JsonTokenType.StartObject);
string?toString = null;
string?idObj = null;
string?typeStr = null;
Entity?entity = null;
reader.Read();
while (reader.TokenType == JsonTokenType.PropertyName)
{
var propName = reader.GetString();
switch (propName)
{
case "toStr": reader.Read(); toString = reader.GetString(); break;
case "id":
{
reader.Read();
idObj =
reader.TokenType == JsonTokenType.Null ? null :
reader.TokenType == JsonTokenType.String ? reader.GetString() :
reader.TokenType == JsonTokenType.Number ? reader.GetInt64().ToString() :
reader.TokenType == JsonTokenType.True ? true.ToString() :
reader.TokenType == JsonTokenType.False ? false.ToString() :
throw new UnexpectedValueException(reader.TokenType);
break;
}
case "EntityType": reader.Read(); typeStr = reader.GetString(); break;
case "entity":
using (EntityJsonConverterFactory.SetPath(".entity"))
{
reader.Read();
var converter = (JsonConverterWithExisting <Entity>)options.GetConverter(typeof(Entity));
entity = converter.Read(ref reader, typeof(Entity), options, (Entity?)(IEntity?)existingValue?.EntityOrNull);
}
break;
default: throw new JsonException("unexpected property " + propName);
}
reader.Read();
}
reader.Assert(JsonTokenType.EndObject);
Type type = TypeLogic.GetType(typeStr !);
PrimaryKey?idOrNull = idObj == null ? (PrimaryKey?)null : PrimaryKey.Parse(idObj, type);
if (entity == null)
{
return((Lite <T>)Lite.Create(type, idOrNull !.Value, toString !));
}
var result = (Lite <T>)entity.ToLiteFat(toString);
if (result.EntityType != type)
{
throw new InvalidOperationException("Types don't match");
}
if (result.IdOrNull != idOrNull)
{
throw new InvalidOperationException("Id's don't match");
}
var existing = existingValue as Lite <T>;
if (existing.Is(result) && existing !.EntityOrNull == null && result.EntityOrNull != null)
{
existing.SetEntity((Entity)(IEntity)result.EntityOrNull);
return(existing);
}
return(result);
}