Using XJB with jaxb2-maven-plugin - maven

Question

I have a multi-module maven project in the following structure:
root-module
|__module-a
| |__src
| |__main
| |__xsd
| | |__my.xsd
| |__xjb
| |__my.xjb
|__module-b
The POM for root module simply aggregates module a and b (among other things):
<project>
<artifactId>root-module</artifactId>
<packaging>pom</packaging>
<modules>
<module>module-a</module>
<module>module-b</module>
</modules>
</project>
And the POM for module a is as follows (among other things):
<project>
<parent>
<artifactId>root-module</artifactId>
</parent>
<artifactId>module-a</artifactId>
<properties>
<my-definitions.xsd>${basedir}/src/main/xsd/my.xsd</my-definitions.xsd>
<my-bindings.xjb>${basedir}/src/main/xjb/my.xjb</my-bindings.xjb>
<my.output>${basedir}/target/generated-sources/jaxb/my</my.output>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>jaxb2-maven-plugin</artifactId>
<executions>
<execution>
<id>generate-my-classes</id>
<phase>generate-sources</phase>
<goals><goal>xjc</goal></goals>
<configuration>
<sources><source>${my-definitions.xsd}</source></sources>
<xjbSources><xjbSource>${my-bindings.xjb}</xjbSource></xjbSources>
<outputDirectory>${my.output}</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
So when I run mvn at module-a, everything works fine and the build succeeds. But when I run it at root-module, I get an exception from the XJC plugin where it tries to find the bindings file under the root-module:
com.sun.istack.SAXParseException2; IOException thrown when processing "file:/home/root-module/src/main/xjb/my.xjb". Exception: java.io.FileNotFoundException: /home/root-module/src/main/xjb/my.xjb (The system cannot find the path specified).
What is interesting is, it is able to locate the XSD correctly:
[ERROR] Failed to execute goal org.codehaus.mojo:jaxb2-maven-plugin:2.1:xjc (generate-my-classe) on project module-a:
[ERROR] +=================== [XJC Error]
[ERROR] |
[ERROR] | 0: file:/home/root-module/module-a/src/main/xsd/my.xsd
[ERROR] |
[ERROR] +=================== [End XJC Error]
Any clues?
Is this a configuration issue in the build script?
Specifics of my build system:
Using Maven 3.2.5
<groupId>org.codehaus.mojo</groupId>
<artifactId>jaxb2-maven-plugin</artifactId>
<version>2.1</version>
Referring JAXB2 Maven plugin documentation from here.
Also searched few related questions on SO, but they do not explain my specific problem anywhere.
UPDATE: Looks like an open issue. Keeping the thread open in case there is a workaround.

Answer 1

Updating to version 2.2 of the plugin appears to work.
<groupId>org.codehaus.mojo</groupId>
<artifactId>jaxb2-maven-plugin</artifactId>
<version>2.2</version>
I had the same problem when using version 2.1 of the plugin. Simply changing to version 2.2 fixed the issue.

Answer 2

Until a plugin resolution is available, I am using the following ant-run hack:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<id>generate-my-classes</id>
<phase>generate-sources</phase>
<goals>
<goal>run</goal>
</goals>
<configuration>
<tasks>
<mkdir dir="${project.build.directory}/generated-sources/jaxb/my" />
<exec executable="${env.JAVA_HOME}/bin/xjc.exe" dir="${project.basedir}/src/main/xsd">
<arg value="-p" />
<arg value="my.package" />
<arg value="-b" />
<arg value="${project.basedir}/src/main/xjb" />
<arg value="-d" />
<arg value="${project.build.directory}/generated-sources/jaxb" />
<arg value="." />
</exec>
</tasks>
</configuration>
</execution>
</executions>
</plugin>
UPDATES:
Discussion on Github.
Considering Apache CXF Utils as an alternative.