Sebastien Dionne

I created a little demo to show how easy it can be to create a kit of classes from DTD and XSD using Maven and JAXB.

To generate from XSD schemas

In your pom.xml, you will have to add this.

<dependencies>
    <dependency>
		  <groupId>com.sun.xml.bind</groupId>
		  <artifactId>jaxb-xjc</artifactId>
		  <version>2.1</version>
		</dependency>
		<dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>2.1</version>
    </dependency>
</dependencies>
  
<build>
  <plugins>
    <plugin>
      <artifactId>maven-compiler-plugin</artifactId>
      <configuration>
        <source>1.5</source>
        <target>1.5</target>
      </configuration>
    </plugin>
    <plugin>
      <groupId>org.jvnet.jaxb2.maven2</groupId>
      <artifactId>maven-jaxb2-plugin</artifactId>
      <executions>
        <execution>
          <goals>
            <goal>generate</goal>
          </goals>
          <configuration>
            <!--  if you want to put DTD somewhere else
            <schemaDirectory>src/main/jaxb</schemaDirectory>
            -->
          </configuration>
        </execution>
      </executions>
      <dependencies>
        <dependency>
          <groupId>org.jvnet.jaxb2-commons</groupId>
          <artifactId>property-listener-injector</artifactId>
          <version>1.0</version>
        </dependency>
      </dependencies>
    </plugin>
  </plugins>
</build>

The important thing to know is that you have to generate your classes with one schema each time. If you put webapp schemas 2.2 and 2.3 in the same time,
you will obtain errors. Be sure to include all the files related to your webapp schema to generate your java classes.

Example : webapp 2.4 need
web-app_2_4.xsd
j2ee_1_4.xsd
jsp_2_0.xsd

You can even do some customization with a config file named : domain.jaxb (/src/main/resources).

To generate from DTD

In your pom.xml, you will have to add this.

<dependencies>
  <dependency>
	  <groupId>com.sun.xml.bind</groupId>
	  <artifactId>jaxb-xjc</artifactId>
	  <version>2.0</version>
	</dependency>
	<dependency>
      <groupId>javax.xml.bind</groupId>
      <artifactId>jaxb-api</artifactId>
      <version>2.0</version>
  </dependency>
</dependencies>

<build>
  <plugins>
    <plugin>
      <artifactId>maven-compiler-plugin</artifactId>
      <configuration>
        <source>1.5</source>
        <target>1.5</target>
      </configuration>
    </plugin>
    <plugin>
      <groupId>org.jvnet.jaxb2.maven2</groupId>
      <artifactId>maven-jaxb2-plugin</artifactId>
      <executions>
        <execution>
          <goals>
            <goal>generate</goal>
          </goals>
          <configuration>
            <!--  if you want to put DTD somewhere else
            <schemaDirectory>src/main/jaxb</schemaDirectory>
            -->
            <extension>true</extension>
            <schemaLanguage>DTD</schemaLanguage>
            <schemaIncludes>
              <schemaInclude>*.dtd</schemaInclude>
            </schemaIncludes>
            <bindingIncludes>
              <bindingInclude>*.jaxb</bindingInclude>
            </bindingIncludes>
            <args>
              <arg>-Xinject-listener-code</arg>
            </args>
          </configuration>
        </execution>
      </executions>
      <dependencies>
        <dependency>
          <groupId>org.jvnet.jaxb2-commons</groupId>
          <artifactId>property-listener-injector</artifactId>
          <version>1.0</version>
        </dependency>
      </dependencies>
    </plugin>
  </plugins>
</build>

The DTD generation is the same pattern as XSD. The principal differences are in the pom.xml

You can download a complete project that use webapp xsd and dtd to parse any web.xml. It could be useful when you want to keep it simple :)

You can browse the code from : my Kenai repository