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.CreateConcreteDictionary();
}
else
{
state.Current.ReturnValue = classInfo.CreateObject();
}
}
private static void HandleStartDictionary(JsonSerializerOptions options, ref ReadStack state)
{
Debug.Assert(!state.Current.IsProcessingEnumerable());
JsonPropertyInfo jsonPropertyInfo = state.Current.JsonPropertyInfo;
if (jsonPropertyInfo == null)
{
jsonPropertyInfo = state.Current.JsonClassInfo.CreateRootObject(options);
}
Debug.Assert(jsonPropertyInfo != null);
// A nested object or dictionary so push new frame.
if (state.Current.CollectionPropertyInitialized)
{
state.Push();
state.Current.JsonClassInfo = jsonPropertyInfo.ElementClassInfo;
state.Current.InitializeJsonPropertyInfo();
state.Current.CollectionPropertyInitialized = true;
ClassType classType = state.Current.JsonClassInfo.ClassType;
if (classType == ClassType.Value)
{
Type elementClassInfoType = jsonPropertyInfo.ElementClassInfo.Type;
if (elementClassInfoType != typeof(object) && elementClassInfoType != typeof(JsonElement))
{
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(state.Current.JsonClassInfo.Type);
}
}
JsonClassInfo classInfo = state.Current.JsonClassInfo;
if (state.Current.IsProcessingIDictionaryConstructible())
{
state.Current.TempDictionaryValues = (IDictionary)classInfo.CreateConcreteDictionary();
}
else
{
if (classInfo.CreateObject == null)
{
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(classInfo.Type);
return;
}
state.Current.ReturnValue = classInfo.CreateObject();
}
return;
}
state.Current.CollectionPropertyInitialized = true;
if (state.Current.IsProcessingIDictionaryConstructible())
{
JsonClassInfo dictionaryClassInfo;
if (jsonPropertyInfo.DeclaredPropertyType == jsonPropertyInfo.ImplementedPropertyType)
{
dictionaryClassInfo = options.GetOrAddClass(jsonPropertyInfo.RuntimePropertyType);
}
else
{
dictionaryClassInfo = options.GetOrAddClass(jsonPropertyInfo.DeclaredPropertyType);
}
state.Current.TempDictionaryValues = (IDictionary)dictionaryClassInfo.CreateConcreteDictionary();
}
else
{
// Create the dictionary.
JsonClassInfo dictionaryClassInfo = jsonPropertyInfo.RuntimeClassInfo;
IDictionary value = (IDictionary)dictionaryClassInfo.CreateObject();
if (value != null)
{
if (state.Current.ReturnValue != null)
{
state.Current.JsonPropertyInfo.SetValueAsObject(state.Current.ReturnValue, value);
}
else
{
// A dictionary is being returned directly, or a nested dictionary.
state.Current.SetReturnValue(value);
}
}
}
}
private static void HandleStartObject(JsonSerializerOptions options, ref ReadStack state)
{
Debug.Assert(!state.Current.IsProcessingDictionaryOrIDictionaryConstructible());
// Note: unless we are a root object, we are going to push a property onto the ReadStack
// in the if/else if check below.
if (state.Current.IsProcessingEnumerable())
{
// A nested object within an enumerable (non-dictionary).
if (!state.Current.CollectionPropertyInitialized)
{
// We have bad JSON: enumerable element appeared without preceding StartArray token.
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(state.Current.JsonPropertyInfo.DeclaredPropertyType);
}
Type objType = state.Current.GetElementType();
state.Push();
state.Current.Initialize(objType, options);
}
else if (state.Current.JsonPropertyInfo != null)
{
// Nested object within an object.
Debug.Assert(state.Current.IsProcessingObject(ClassType.Object));
Type objType = state.Current.JsonPropertyInfo.RuntimePropertyType;
state.Push();
state.Current.Initialize(objType, options);
}
JsonClassInfo classInfo = state.Current.JsonClassInfo;
if (state.Current.IsProcessingObject(ClassType.IDictionaryConstructible))
{
state.Current.TempDictionaryValues = (IDictionary)classInfo.CreateConcreteDictionary();
state.Current.CollectionPropertyInitialized = true;
}
else if (state.Current.IsProcessingObject(ClassType.Dictionary))
{
if (classInfo.CreateObject == null)
{
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(classInfo.Type, parentType: null, memberInfo: null);
}
state.Current.ReturnValue = classInfo.CreateObject();
state.Current.CollectionPropertyInitialized = true;
}
else if (state.Current.IsProcessingObject(ClassType.Object))
{
if (classInfo.CreateObject == null)
{
ThrowHelper.ThrowNotSupportedException_DeserializeCreateObjectDelegateIsNull(classInfo.Type);
}
state.Current.ReturnValue = classInfo.CreateObject();
if (state.Current.IsProcessingDictionary())
{
state.Current.CollectionPropertyInitialized = true;
}
}
else
{
// Only dictionaries or objects are valid given the `StartObject` token.
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(classInfo.Type);
}
}