Generating hashCode() and equals() when creating Java classes using Mojo Jaxb2 maven plugin

Question

The code I'm working on is using jaxb2-maven-plugin from org.codehaus.mojo to generate Java classes from XSD schema. I'm looking for a way to automatically implement equals() and hashCode() methods for those classes, but it seems there is not a way. I know that there are other JAXB2 Maven plugins that do that (http://confluence.highsource.org/display/J2B/Home for example), but I was wondering if anyone of you encountered this issue before and if there's a way for fixing it. I'm generating the classes using the xjc goal.

Answer 1

JAXB2 Basics you're mentioning is not a property of maven-jaxb2-plugin, it is a standalone set of JAXB 2.x plugins you can use with XJC - or jaxb2-maven-plugin or whatever.

        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>jaxb2-maven-plugin</artifactId>
            <version>1.3.1</version>
            <executions>
                <execution>
                    <id>xjc</id>
                    <goals>
                        <goal>xjc</goal>
                    </goals>
                </execution>
           </executions>
           <configuration>
                <arguments>
                     <argument>-Xequals</argument>
                     <argument>-XhashCode</argument>
                </arguments>
           </configuration>
           <dependencies>
                <dependency>
                    <groupId>org.jvnet.jaxb2_commons</groupId>
                    <artifactId>jaxb2-basics</artifactId>
                    <version>0.12.0</version>
                </dependency>
           </dependencies>
       </plugin>

What I wanted to ask - why not just use maven-jaxb2-plugin? It has so much more functionality compared to the Codehaus plugin - including configuration support for JAXB2 plugins.