Jaxb2 regenerate classes with every mvn clean package

Question

My pom looks like

<plugins>
        <plugin>
            <groupId>org.jvnet.jaxb2.maven2</groupId>
            <artifactId>maven-jaxb2-plugin</artifactId>
            <version>0.12.3</version>
            <executions>
                <execution>
                    <goals>
                        <goal>generate</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <schemaLanguage>WSDL</schemaLanguage>
                <generateDirectory>src/main/java</generateDirectory>
                <schemaDirectory>src/main/resources/wsdl/</schemaDirectory>
                <schemaIncludes>
                    <include>*.xsd</include>
                    <include>draw/*.xsd</include>
                </schemaIncludes>
            </configuration>
        </plugin>

    </plugins>

When I do a mvn clean package it is built according to the configuration. However after I have built it once I don't want to build it every time I do a mvn clean package unless the XSD has been modified somehow.

How do I achieve this?

Answer 1

The default phase declared in this plugin for the goal <goal>generate</goal> is generate-resources. referring to Maven Default Lifecycle you can't skip phases. The mvn phase-x command always means "run all phases until phase-x, inclusive".

The option you may use is profile. so you can profile your project to be build with or without generating resources.

Example:

  <profiles>
    <profile>
        <id>GEN-RESOURCES</id>
        <build>
            <plugins>
                <plugin>
                    <groupId>org.jvnet.jaxb2.maven2</groupId>
                    <artifactId>maven-jaxb2-plugin</artifactId>
                    <version>0.12.3</version>
                    <executions>
                        <execution>
                            <goals>
                                <goal>generate</goal>
                            </goals>
                        </execution>
                    </executions>
                    <configuration>
                        <schemaLanguage>WSDL</schemaLanguage>
                        <generateDirectory>src/main/java</generateDirectory>
                        <schemaDirectory>src/main/resources/wsdl/</schemaDirectory>
                        <schemaIncludes>
                            <include>*.xsd</include>
                            <include>draw/*.xsd</include>
                        </schemaIncludes>
                    </configuration>
                </plugin>

            </plugins>
        </build>
    </profile>
</profiles>

to activate the profile use -P

mvn clean package -PGEN-RESOURCES

otherwise no thing will be generated Maven profile explained here

I hope this helps.