Java Ninja Chronicles By Norris Shelton

Things I learned in the pursuit of code

Normally, I have been able to generate a Soap client and be on my way. This particular time I had to perform some business logic on the client. One of the first things that I encountered was the nuisance of debugging classes without a toString() implementation. It’s no biggie, but it does waste time when you have to open a class to inspect it’s contents. When it has a toString() implementation, your editor will generally use this to display the class. Making one less step that I have to perform.

The business logic I had to implement involved splitting a list of items into two groups, according to the value of one of the properties. In addition, if the object was already in the list, but had a different address, I had to add the current address to the existing object instead of adding it again. Great. Now I need to be able to identify an object in a list. I found that JAXB-2 Basics added implementations of equals() and hashcode() methods.

Just when I thought I was done, I had to add the serializable interface because the web application is marked as distributable. This wasn’t provided by JAXB2-Basics and I had to use an XML binding to add that.

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns=""



        <!-- Jetty is needed if you're are not using the CXFServlet -->

            Spring dependencies - needed to force a newer version than CXF used


                                    <!--note: Started getting errors by having this hit their URL directly-->

To use JAXB2-Basics, I added the module dependency starting at line 52. I also added a dependency for the cxf-codegen-plugin at line 93. After that, I had to add the at line 83.

  • -xjc-XtoString – triggers the generation of the toString() method
  • -xjc-Xequals – triggers the generation of the equals() method
  • -xjc-XhashCode – triggers the generation of the hashcode() method

The jaxb binding took a bit more work, but was fairly easy also. I specified the binding file on line 80. ${basedir} is a maven variable that is set to the directory of the module. The binding file is fairly straight forward. I specified a global binding that said serializable. I also specified the optional uid. If the uid is specified, then the value will be specified in the classes. NOTE: that the same uid value will be specified for all classes.

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<jaxb:bindings version="2.0" xmlns:jaxb="">
            <jaxb:serializable uid="1"/>

April 3rd, 2012

Posted In: Java, Maven, xml

Tags: , ,

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