XML with Java and JDOM

A few months ago, I worked on a java project which had to manage XML data. The XML data that I had to deal with weren’t very complex so I try to find the easiest way to manage XML data with Java and I found JDOM.

We want to provide a solution for using XML from Java that is as simple as Java itself.
There is no compelling reason for a Java API to manipulate XML to be complex, tricky, unintuitive, or a pain in the neck. JDOMTM is both Java-centric and Java-optimized. It behaves like Java, it uses Java collections, it is completely natural API for current Java developers, and it provides a low-cost entry point for using XML.
While JDOM interoperates well with existing standards such as the Simple API for XML (SAX) and the Document Object Model (DOM), it is not an abstraction layer or enhancement to those APIs. Rather, it provides a robust, light-weight means of reading and writing XML data without the complex and memory-consumptive options that current API offerings provide.

The JDOM team

The Visitor Pattern

For my work I needed to browse a “tree” to retrieve some data and make operations with it. To manage this, I made some research and I found a design pattern that I didn’t know yet: The Visitor Pattern.

To spread a hierarchy of classes, normally you simply add methods which provide desired behavior. It can happen however that this behavior is not consistent with the logic of the existent object model. It is also possible that you do not have access to existent code. In such situations, it can be impossible to spread the behavior of hierarchy without changing his classes. The Visitor Pattern precisely allows the developer of a hierarchy to insert a support for cases where other developers would like to spread his behavior.

Subversive in Eclipse Ganymede

While trying to install Subversive on Eclipse Ganymede I get this error :

Cannot find a solution where both Match[requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.team.svn.feature.group/[0.7.1.I20080612-1500,0.7.1.I20080612-1500]] and Match[requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.team.svn.feature.group/[0.7.3.I20080814-1500,1.0.0)] can be satisfied.
Unsatisfied dependency: [org.polarion.eclipse.team.svn.connector.svnkit.feature.group 2.0.3.I20080814-1500] requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.team.svn.feature.group/[0.7.3.I20080814-1500,1.0.0)
Unsatisfied dependency: [org.polarion.eclipse.team.svn.connector.svnkit.feature.group 2.0.3.I20080814-1500] requiredCapability: org.eclipse.equinox.p2.iu/org.polarion.eclipse.team.svn.connector.feature.group/0.0.0
Unsatisfied dependency: [org.polarion.eclipse.team.svn.connector.svnkit15.feature.group 2.0.3.I20080814-1500] requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.team.svn.feature.group/[0.7.3.I20080814-1500,1.0.0)
Unsatisfied dependency: [org.polarion.eclipse.team.svn.connector.svnkit15.feature.group 2.0.3.I20080814-1500] requiredCapability: org.eclipse.equinox.p2.iu/org.polarion.eclipse.team.svn.connector.feature.group/0.0.0
Unsatisfied dependency: [org.polarion.eclipse.team.svn.connector.feature.group 2.0.3.I20080814-1500] requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.team.svn.feature.group/[0.7.3.I20080814-1500,1.0.0)

Would you like to take a coffee ?

Hi,

I’m starting this blog just to share and do a backup of the interesting things I found about Java & Eclipse.
I will try to update the blog the most often I can.

Enjoy.