private static void HandleStartObject(JsonSerializerOptions options, ref ReadStack state)
{
Debug.Assert(!state.Current.IsProcessingDictionary());
if (state.Current.IsProcessingEnumerable())
{
// A nested object within an enumerable.
Type objType = state.Current.GetElementType();
state.Push();
state.Current.Initialize(objType, options);
}
else if (state.Current.JsonPropertyInfo != null)
{
// Nested object.
Type objType = state.Current.JsonPropertyInfo.RuntimePropertyType;
state.Push();
state.Current.Initialize(objType, options);
}
JsonClassInfo classInfo = state.Current.JsonClassInfo;
if (classInfo.CreateObject is null && classInfo.ClassType == ClassType.Object)
{
if (classInfo.Type.IsInterface)
{
ThrowHelper.ThrowInvalidOperationException_DeserializePolymorphicInterface(classInfo.Type);
}
else
{
ThrowHelper.ThrowInvalidOperationException_DeserializeMissingParameterlessConstructor(classInfo.Type);
}
}
if (state.Current.IsProcessingObject(ClassType.Dictionary))
{
object value = ReadStackFrame.CreateDictionaryValue(ref state);
// If value is not null, then we don't have a converter so apply the value.
if (value != null)
{
state.Current.ReturnValue = value;
state.Current.DetermineIfDictionaryCanBePopulated(state.Current.ReturnValue);
}
state.Current.CollectionPropertyInitialized = true;
}
else
{
state.Current.ReturnValue = classInfo.CreateObject();
}
}
private static void HandleStartObject(JsonSerializerOptions options, ref Utf8JsonReader reader, ref ReadStack state)
{
Debug.Assert(!state.Current.IsProcessingDictionary && !state.Current.IsProcessingIDictionaryConstructible);
if (state.Current.IsProcessingEnumerable)
{
// A nested object within an enumerable.
Type objType = state.Current.GetElementType();
state.Push();
state.Current.Initialize(objType, options);
}
else if (state.Current.JsonPropertyInfo != null)
{
// Nested object.
Type objType = state.Current.JsonPropertyInfo.RuntimePropertyType;
state.Push();
state.Current.Initialize(objType, options);
}
JsonClassInfo classInfo = state.Current.JsonClassInfo;
if (classInfo.CreateObject is null && classInfo.ClassType == ClassType.Object)
{
if (classInfo.Type.IsInterface)
{
ThrowHelper.ThrowInvalidOperationException_DeserializePolymorphicInterface(classInfo.Type);
}
else
{
ThrowHelper.ThrowInvalidOperationException_DeserializeMissingParameterlessConstructor(classInfo.Type);
}
}
if (state.Current.IsProcessingIDictionaryConstructible)
{
state.Current.TempDictionaryValues = (IDictionary)classInfo.CreateObject();
}
else if (state.Current.JsonClassInfo.ClassType == ClassType.Value)
{
// Custom converter.
state.Current.JsonPropertyInfo.Read(JsonTokenType.StartObject, ref state, ref reader);
HandleEndObject(options, ref reader, ref state);
}
else
{
state.Current.ReturnValue = classInfo.CreateObject();
}
}
