Java Persistent Objects (JPOX)
JDO implementation using JDBC. A fork of TJDO with application identity, support for existing schemas, and conformance for J2EE. [Open source, Apache 2 license]
Java Pro - JDOQL: The JDO Query Language
By David Jordan. Java developers currently have several data persistence techniques in their repertoire. However, each of these techniques has its drawbacks. See how JDO and its qu…
Java(TM) Data Objects (JDO) Specification
The Proposed Final Draft of the JDO 1.1 specification for object-relational mapping on the Java platform.
JDO Central
Provides an interactive forum for activities such as organizing events, preparing an events calendar, distributing newsletters, and downloading JDO-related products.
ONJava.com: "Castor JDO": Simply False Advertising
This expert perspective lays it on the line: Exolab's Castor JDO product does not support the JDO standard.
ONJava.com: Flawed JDO Points the Way to the "Objectbase" [Apr. 24, 2002]
Java Data Objects (JDO) is neither a silver bullet nor without merit. But its most important contribution may be to wake developers up to the coming paradigm shift: from database t…
ONJava.com: Flawed Understanding of JDO Leads to FUD
In this scathing response to Don Bales' recent critique of Java Data Objects, David Jordan offers proof that JDO does not regard SQL as a bad thing, yields shorter and simpler code…
ONJava.com: Using Castor JDO for SQL Mapping
An in-depth look at using Castor's marshalling engine to do data binding of Java objects to tables, rows, and columns in an SQL database.
Persist data with Java Data Objects, Part 1
Jacek Kruszelnicki discusses the issues encountered with persistence, presents traits for an ideal persistence layer, and reviews available JDO solutions.
Persist data with Java Data Objects, Part 2
This article presents two major JDO specifications: the Sun Microsystems JDO and the open source Castor JDO. Jacek Kruszelnicki discusses their relative pros and cons, and their si…
TriActive JDO (TJDO)
Implementation of Sun's JDO specification (JSR 12), designed to support transparent persistence using any JDBC-compliant database. [Open source, Apache Software License]
XORM (Extensible Object-Relational Mapping for Java)
Provides interface-based persistence to RDBMSs while allowing developers to focus on the object model, not the physical layer. It implements many of the interfaces specified by JDO…