// todo: to avoid hashtable lookups, cache this:
//public JsonClassInfo ClassInfo;
public JsonPropertyInfo(Type parentClassType, Type propertyType, PropertyInfo propertyInfo, Type elementType, JsonSerializerOptions options)
{
ParentClassType = parentClassType;
PropertyType = propertyType;
PropertyInfo = propertyInfo;
ClassType = JsonClassInfo.GetClassType(propertyType);
if (elementType != null)
{
ElementClassInfo = options.GetOrAddClass(elementType);
}
IsNullableType = propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(Nullable <>);
CanBeNull = IsNullableType || !propertyType.IsValueType;
}
public virtual void Initialize(
Type parentClassType,
Type declaredPropertyType,
Type runtimePropertyType,
PropertyInfo propertyInfo,
Type elementType,
JsonSerializerOptions options)
{
ParentClassType = parentClassType;
DeclaredPropertyType = declaredPropertyType;
RuntimePropertyType = runtimePropertyType;
PropertyInfo = propertyInfo;
ClassType = JsonClassInfo.GetClassType(runtimePropertyType);
_elementType = elementType;
Options = options;
IsNullableType = runtimePropertyType.IsGenericType && runtimePropertyType.GetGenericTypeDefinition() == typeof(Nullable <>);
CanBeNull = IsNullableType || !runtimePropertyType.IsValueType;
}
internal JsonPropertyInfo(
Type parentClassType,
Type declaredPropertyType,
Type runtimePropertyType,
PropertyInfo propertyInfo,
Type elementType,
JsonSerializerOptions options)
{
ParentClassType = parentClassType;
DeclaredPropertyType = declaredPropertyType;
RuntimePropertyType = runtimePropertyType;
PropertyInfo = propertyInfo;
ClassType = JsonClassInfo.GetClassType(runtimePropertyType);
if (elementType != null)
{
ElementClassInfo = options.GetOrAddClass(elementType);
}
IsNullableType = runtimePropertyType.IsGenericType && runtimePropertyType.GetGenericTypeDefinition() == typeof(Nullable <>);
CanBeNull = IsNullableType || !runtimePropertyType.IsValueType;
}
// todo: to minimize hashtable lookups, cache JsonClassInfo:
//public JsonClassInfo ClassInfo;
public virtual void Initialize(
Type parentClassType,
Type declaredPropertyType,
Type runtimePropertyType,
PropertyInfo propertyInfo,
Type elementType,
JsonSerializerOptions options)
{
ParentClassType = parentClassType;
DeclaredPropertyType = declaredPropertyType;
RuntimePropertyType = runtimePropertyType;
PropertyInfo = propertyInfo;
ClassType = JsonClassInfo.GetClassType(runtimePropertyType);
if (elementType != null)
{
Debug.Assert(ClassType == ClassType.Enumerable || ClassType == ClassType.Dictionary);
ElementClassInfo = options.GetOrAddClass(elementType);
}
IsNullableType = runtimePropertyType.IsGenericType && runtimePropertyType.GetGenericTypeDefinition() == typeof(Nullable <>);
CanBeNull = IsNullableType || !runtimePropertyType.IsValueType;
}
private static bool HandleObject(
JsonSerializerOptions options,
ref Utf8JsonWriter writer,
ref WriteStack state)
{
Debug.Assert(state.Current.JsonClassInfo.ClassType == ClassType.Object);
JsonPropertyInfo jsonPropertyInfo = state.Current.JsonClassInfo.GetProperty(state.Current.PropertyIndex);
ClassType propertyClassType = jsonPropertyInfo.ClassType;
bool obtainedValue = false;
object currentValue = null;
// Check for polymorphism.
if (jsonPropertyInfo.RuntimePropertyType == typeof(object))
{
Debug.Assert(propertyClassType == ClassType.Object);
currentValue = jsonPropertyInfo.GetValueAsObject(state.Current.CurrentValue, options);
obtainedValue = true;
if (currentValue != null)
{
Type runtimeType = currentValue.GetType();
// Ignore object() instances since they are handled as an empty object.
if (runtimeType != typeof(object))
{
propertyClassType = JsonClassInfo.GetClassType(runtimeType);
jsonPropertyInfo = state.Current.JsonClassInfo.CreatePolymorphicProperty(jsonPropertyInfo, runtimeType, options);
}
}
}
state.Current.JsonPropertyInfo = jsonPropertyInfo;
if (propertyClassType == ClassType.Value)
{
jsonPropertyInfo.Write(options, ref state.Current, ref writer);
state.Current.NextProperty();
return(true);
}
// A property that returns an enumerator keeps the same stack frame.
if (propertyClassType == ClassType.Enumerable)
{
bool endOfEnumerable = HandleEnumerable(jsonPropertyInfo.ElementClassInfo, options, ref writer, ref state);
if (endOfEnumerable)
{
state.Current.NextProperty();
}
return(endOfEnumerable);
}
// A property that returns an object.
if (!obtainedValue)
{
currentValue = jsonPropertyInfo.GetValueAsObject(state.Current.CurrentValue, options);
}
if (currentValue != null)
{
// A new stack frame is required.
JsonPropertyInfo previousPropertyInfo = state.Current.JsonPropertyInfo;
state.Current.NextProperty();
JsonClassInfo nextClassInfo = options.GetOrAddClass(jsonPropertyInfo.RuntimePropertyType);
state.Push(nextClassInfo, currentValue);
// Set the PropertyInfo so we can obtain the property name in order to write it.
state.Current.JsonPropertyInfo = previousPropertyInfo;
}
else
{
if (!jsonPropertyInfo.IgnoreNullPropertyValueOnWrite(options))
{
writer.WriteNull(jsonPropertyInfo._escapedName);
}
state.Current.NextProperty();
}
return(true);
}