Monthly Archives: July 2010

Writing data to Excel from Java – the simple way

Posted on July 14, 2010 by datanucleus

On the web you can find some blogs about how to use Apache POI to create an Excel spreadsheet. They typically contain reams of code just to add a simple table and some rows of data. It’s always amazing the … Continue reading →

Posted in Excel, JDO | 5 Comments

TJDO has left the building

Posted on July 13, 2010 by datanucleus

As anyone who has been using DataNucleus (and JPOX before it) for some time will know, it all started out (in 2003) as TJDO. This project was forked to provide all of the missing functionality that JDO requires and users … Continue reading →

Posted in Uncategorized | Leave a comment

JDO Typesafe Queries : Part 2 – Expressions

Posted on July 7, 2010 by datanucleus

Continuing on from the previous post, in order to be able to express components of a query in a Java style we need to represent all fields/properties/parameters/variables as expressions. The type of the field/property/parameter/variable determines its expression type. Let’s take … Continue reading →

Posted in JDO, JDOQL, Persistence | 11 Comments