I have a data type with two fields; instances of this type are immutable. The values are provided as parameters to the constructor and cannot be changed subsequently. Therefore the setPropertyValue method in CompositeUserType is of no use to me when modelling this type; I need to ensure that nullSafeGet is what's used when creating an instance of this type from the database, because it has access to all resultset fields at once. Can I do this? How?