Java Data Objects: Difference between revisions

Revision as of 12:20, 30 August 2011

Revision as of 12:54, 30 August 2011

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JDO enhanced classes are portable across different vendors' implementation. Once enhanced, a Java class can be used with any vendor's JDO product.

JDO is integrated with [[Java Platform, Enterprise Edition|Java EE]] in several ways. First of all, the vendor implementation may be provided as a JEE Connector. Secondly, JDO may work in the context of JEE [[Java transaction service|transaction services]].

== JDO vs. EJB3 vs. JPA ==

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* Disconnected Object Graphs concept

* Standardized ORM Mapping Descriptors (for ORM-based JDO Implementations)

* JDOQL Enhancements (Single String Form; more String, Map & Math methods support mandated)

* Get e.g. a {{Javadoc:SE|java/sql|Connection}} from <code>javax.jdo.PersistenceManager</code>

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* [[Java Persistence API]] (JPA)

* [[DataNucleus]]

* [http://db.apache.org/jdo/ Apache JDO]

* [http://jmasters.info:8080/jops/ JOPS (open source)] - Java Objects Persistence Service.

==Bibliography==

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| last2 = Russell

| date = April 22, 2003

| title = Java Data Objects

| publisher = [[O'Reilly Media]]

| edition = 1st