JavaTM Architecture for XML Binding
Developing JAXB RI Extensions

Specification Version: 2.0
Reference Implementation (RI) Version: 2.0.2 fcs

This document describes how to write an XJC plugin to extend the code generation of XJC.

What Can A Plugin Do?

An XJC plugin participates in the code generation from a schema. It can define its own customizations that users can use to control it, it can access the code that the JAXB RI generates, it can generate additional classes/methods/fields/annotations/comments, and it can also replace some of the pluggability points in the compilation process, such as XML name -> Java name conversion.

As a show case of what a plugin can do, take a look at plugins hosted at JAXB2-commons.

Quick Start

To write a plugin, do the following simple steps.

  1. Write a class, say, org.acme.MyPlugin by extending See javadoc for how to implement methods.
  2. Write the name of your plugin class in a text file and put it as /META-INF/services/ in your jar file.

Users can then use your plugins by declaring an XJC ant task with your jar files.

<taskdef name="xjc" classname="">
    <fileset dir="jaxb-ri/lib" includes="*.jar" />
    <fileset dir="your-plugin" includes="*.jar" />


See this page for more detailed, up-to-date information.

Although we will do our best to maintain the compatibility of the interfaces, it is still subject to change at this point.