Java Tutorial/Ant/Mapper

Use mapper to map a file

   <source lang="java">

<?xml version="1.0"?> <project name="Apache Ant Properties Project" basedir=".">

 <fileset dir="." id="uptodate.id">
   <include name="src/jstl/One.java"/>
 </fileset>
 <condition property="uptodate">
   <uptodate>
     <srcfiles refid="uptodate.id"/>
     <mapper type="merge" to="./One.java"/>
   </uptodate>
 </condition>
 <target name="compile" if="uptodate">
   <echo message="File changed: ${uptodate}"/>
 </target>

</project></source>