public override Object ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer)
{
Object obj = serializer.Deserialize(reader, MakeGenericType(objectType));
if (obj is null)
{
return(null);
}
Type type = obj.GetType();
if (!type.IsGenericType)
{
return(obj);
}
if (type.GetGenericTypeDefinition() != DictionaryTypeDifinition)
{
return(obj);
}
Type[] generic = type.GetGenericArguments()[1].GetGenericArguments();
Type tree = DictionaryTreeTypeDifinition.MakeGenericType(generic);
ConstructorInfo method = tree.GetConstructor(new[]
{
DictionaryTypeDifinition.MakeGenericType(generic[0], DictionaryTreeNodeTypeDifinition.MakeGenericType(generic)),
IEqualityComparerTypeDifinition.MakeGenericType(generic[0])
});
return(method?.Invoke(new[] { obj, null }));
}
protected virtual Type MakeGenericType(Type objectType)
{
try
{
if (!objectType.IsGenericType)
{
return(objectType);
}
Type definition = objectType.GetGenericTypeDefinition();
if (definition == IEqualityComparerTypeDifinition)
{
return(EqualityComparerTypeDifinition.MakeGenericType(objectType.GetGenericArguments()));
}
if (definition == DictionaryTreeTypeDifinition || definition == IDictionaryTreeTypeDifinition)
{
Type[] generic = objectType.GetGenericArguments();
return(DictionaryTypeDifinition.MakeGenericType(generic[0], DictionaryTreeNodeTypeDifinition.MakeGenericType(generic[0], generic[1])));
}
return(objectType);
}
catch (Exception exception)
{
throw new JsonSerializationException($"Unable to construct concrete type from generic {objectType}", exception);
}
}
