Running the Doclet from Ant

To run the UMLGraph doclet from ant, use a rule, like the following.

<target name="uml" depends="prepare">
       <property name="uml.dir" value="${basedir}/uml"/>
       <property name="src.uml.dir" value="${src.dir}/uml"/>
       <mkdir dir="${uml.dir}"/>
       <path id="uml.source.path">
           <pathelement path="${src.uml.dir}/"/>
           <pathelement path="${src.java.dir}"/>
         </path>
       <javadoc sourcepathref="uml.source.path" packagenames="*" package="true">
           <doclet name="org.umlgraph.doclet.UmlGraph" path="${basedir}/lib/UmlGraph.jar">
               <param name="-d" value="${uml.dir}"/>
           </doclet>
       </javadoc>
       <apply executable="dot" dest="${uml.dir}" parallel="false">
         <arg value="-Tpng"/>
         <arg value="-o"/>
         <targetfile/>
         <srcfile/>
         <fileset dir="${uml.dir}" includes="*.dot"/>
         <mapper type="glob" from="*.dot" to="*.png"/>
       </apply>
   </target>

Notes

When you pass the packagenames option to javadoc, the default (unnamed) package (and the UMLOptions class located in it) is ignored. In such cases you should include the UMLOptions class within a named package.
The above invocation will generated a single class diagram. If multiple view generation is required you should add the views option.