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Computers/Programming/Languages/Java/Databases_and_Persistence/Object_Persistence/JDO

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JDO resources

Java(TM) Data Objects (JDO) Specification

The Proposed Final Draft of the JDO 1.1 specification for object-relational mapping on the Java platform.

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]

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: 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.

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. [Open source, GPL]

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, and is vendor-neutral.

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 to objectbase, a place where not only data but data and behaviors are stored...

Castor

Integrates Java objects, XML documents, SQL relational databases and LDAP directories in a unified model that allows information to be exchanged, persisted and manipulated in a variety of ways. Supports JDO. [Open Source, BSD-like]

TheServerSide.com: Simplifying Domain Model Persistence in a J2EE application by using JDO

By Chris Richardson. Learn how to use Java Data Objects (JDO) to accelerate development and test domain model outside of the application server and without a database.

Java Data Objects (JDO)

A home page for JSR-000012, Java Data Objects.