<target name="enhance">

     <path id="enhanceclasspath">
    	<pathelement location="build"/>
    	<fileset dir="${openjpa.home}">
        <include name="**/*.jar"/>
        </fileset>
    </path>

    <!-- define the openjpac task-->
    <taskdef name="openjpac" classname="org.apache.openjpa.ant.PCEnhancerTask">
        <classpath refid="enhanceclasspath"/>
    </taskdef>

    <!-- invoke enhancer the enhancer -->
    <openjpac>
    	<classpath refid="enhanceclasspath"/>
    </openjpac>
    <echo message="Enhancing complete."/>
    </target>