public static PropertyValueConverterAttribute GetPropertyValueConverter(
Type parentClassType,
PropertyInfo propertyInfo,
Type propertyType,
JsonSerializerOptions options)
{
if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
propertyType = Nullable.GetUnderlyingType(propertyType);
}
PropertyValueConverterAttribute attr = GetPropertyValueConverterInternal(parentClassType, propertyInfo, options, propertyType);
// For Enums, support both the type Enum plus strongly-typed Enums.
if (attr == null && (propertyType.IsEnum || propertyType == typeof(Enum)))
{
attr = DefaultConverters.GetPropertyValueConverterInternal(parentClassType, propertyInfo, options, typeof(Enum));
if (attr == null)
{
attr = DefaultConverters.s_enumConverterAttibute;
}
}
return(attr);
}
private static PropertyValueConverterAttribute GetPropertyValueConverterInternal(
Type parentClassType,
PropertyInfo propertyInfo,
JsonSerializerOptions options,
Type propertyType)
{
if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
propertyType = Nullable.GetUnderlyingType(propertyType);
}
PropertyValueConverterAttribute attr = null;
if (propertyInfo != null)
{
// Use Property first
attr = options.GetAttributes <PropertyValueConverterAttribute>(propertyInfo).Where(a => a.PropertyType == propertyType).FirstOrDefault();
if (attr == null)
{
// Then class type
attr = options.GetAttributes <PropertyValueConverterAttribute>(parentClassType, inherit: true).Where(a => a.PropertyType == propertyType).FirstOrDefault();
if (attr == null)
{
// Then declaring assembly
attr = options.GetAttributes <PropertyValueConverterAttribute>(parentClassType.Assembly).Where(a => a.PropertyType == propertyType).FirstOrDefault();
if (attr == null)
{
// Then global
attr = options.GetAttributes <PropertyValueConverterAttribute>(JsonSerializerOptions.GlobalAttributesProvider).Where(a => a.PropertyType == propertyType).FirstOrDefault();
if (attr == null)
{
// Then default
if (propertyType == typeof(DateTime))
{
attr = DefaultConverters.s_dateConverterAttibute;
}
}
}
}
}
}
return(attr);
}
protected PropertyValueConverterAttribute GetPropertyValueConverter(JsonSerializerOptions options)
{
PropertyValueConverterAttribute attr = DefaultConverters.GetPropertyValueConverter(ParentClassType, PropertyInfo, PropertyType, options);
return(attr);
}
