Some types need to be able to handle dynamic descriptors. For instance, see SerializableToBlobType. Its javaTypeDescriptor changes based on the generic T. This is necessary to account for entities within multiple class loaders.

SimpleValueBinder and SimpleValue accomplish this with the legacy DynamicParameterizedType. However, it gets messy with descriptors since they're mostly handled in type constructors and are final.

It would be better to handle these up front. Re-architect SimpleValue's use of reflection to create the types – or find a better alternative.