If the data in your database is complex or the mapping from the relational model to the
Java object model is complex, it is best to use JDO with Java application servers
instead of JDBC or SQLJ. This would mean that the mapping can be placed in one
location outside of your application or application server as opposed to mapping data in multiple locations. See JDBC
data conversion (new window) and SQLJ
data conversion (new window).
Having
to map data in only one location simplifies both development and maintenance.
If you have new data and do not have an existing database that requires data
mapping, take a look at EJB
accelerators (new window).
For more information on JDO issues related to data mapping, see JDO
data conversion (new window).
Also, if you are not familiar with the concept of complex data, see complex
data (new window).
