Chapter 12. Field Management

JDO provides interfaces that allow you to have some control over the management of the fields in a persistent class, including their access and storage. In addition, you can specify how a field with a null value is handled if the underlying datastore does not support null values. JDO metadata controls many of these field-management capabilities.

Get Java Data Objects now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.