POM for generating jaxb.index files for custom JAXB model classes

jaxb-index-pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>artifact</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <model.out.dir>${project.build.outputDirectory}/model</model.out.dir>
    </properties>

    <build>
        <plugins>
                 
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-antrun-plugin</artifactId>
                <version>1.8</version>
                <executions>
                    <!-- Generates the jaxb.index files for JAXB -->
                    <execution>
                        <id>gen-jaxb.index</id>
                        <phase>process-classes</phase>
                        <goals>
                            <goal>run</goal>
                        </goals>
                        <configuration>
                            <target>
                                <ac:for param="dir" xmlns:ac="antlib:net.sf.antcontrib">
                                    <dirset dir="${model.out.dir}"/>
                                    <sequential>
                                        <delete file="@{dir}/jaxb.index" quiet="true"/>

                                        <echo>[jaxb.index] Processing directory @{dir}</echo>
                                        <ac:for param="file" xmlns:ac="antlib:net.sf.antcontrib">
                                            <fileset dir="@{dir}" includes="*.class" excludes="*$*"/>

                                            <sequential>
                                                <local name="class.filename"/>
                                                <basename property="class.filename" file="@{file}" suffix=".class"/>
                                                <echo file="@{dir}/jaxb.index" append="true">
                                                    ${class.filename}${line.separator}
                                                </echo>
                                            </sequential>
                                        </ac:for>
                                    </sequential>
                                </ac:for>
                            </target>
                        </configuration>
                    </execution>
                </executions>

                <dependencies>
                    <dependency>
                        <groupId>ant-contrib</groupId>
                        <artifactId>ant-contrib</artifactId>
                        <version>1.0b3</version>
                        <exclusions>
                            <exclusion>
                                <groupId>ant</groupId>
                                <artifactId>ant</artifactId>
                            </exclusion>
                        </exclusions>
                    </dependency>
                    <dependency>
                        <groupId>org.apache.ant</groupId>
                        <artifactId>ant-nodeps</artifactId>
                        <version>1.8.1</version>
                    </dependency>
                </dependencies>
            </plugin>

        </plugins>

    </build>
</project>