generateLex.xml

<!-- This ant file is used as a common ant file for all projects that need a lex generation with jflex.
     Subprojects needs only to define their properties and the generate-all target will work with this local parameters 
     This file assumes that : 
         - there is a 'lex' directory in the current project
         - ExampleMetric.lex is excluded from generation
         
     If at least one file is modified in the lex directory, or one java file is deleted, the full generation is proceeded
-->

<project name="Parent" default="generate-all">

	<!-- Use the ant-contrib with foreach, provided in libtools of current project -->
	<taskdef resource="net/sf/antcontrib/antlib.xml">
		<classpath>
			<!-- basedir will be the current build path, so use .. here -->
			<pathelement location="../libtools/ant-contrib.jar" />
		</classpath>
	</taskdef>

		<!-- basedir will be the current build path, so must use also .. to access to jar file pulled by the parent pom -->
	    <property name="jflex-jar" value="../target/jflex/jflex-1.6.1.jar" /> 

	<!-- Override these properties in sub ant files (copy these 2 lines in child and set dest) -->
	<property name="dest" value="TOBEDEFINED_IN_CHILD with for instance : src-gen/fr/cnes/analysis/tools/fortran77/metrics" />
	<property name="absdest" location="${dest}" />
	<property name="lexDir" location="lex/" />
	<property name="excludedLex" value="Set here the name of the lex file to exclude from generation : ExampleMetric.lex or ExampleRule.lex..."/>

	<uptodate property="javaCodeIsGenerated">
		<srcfiles dir="${lexDir}" includes="*.lex" excludes="${excludedLex}" />
		<mapper type="glob" from="*.lex" to="${absdest}/*.java" />
	</uptodate>

	<target name="clean">
		<delete dir="src-gen/fr" />
	</target>

	<target name="generate-all" unless="javaCodeIsGenerated">

		<foreach target="generate" param="lexFile">
			<path>
				<fileset dir="${lexDir}">
					<include name="*.lex" />
					<exclude name="${excludedLex}" />
				</fileset>
			</path>
		</foreach>
		<move todir="${dest}">
			<fileset dir="${lexDir}">
				<include name="*.java" />
			</fileset>
		</move>
	</target>

	<target name="generate">
		<java jar="${jflex-jar}" fork="true" failonerror="true" maxmemory="128m">
			<arg value="${lexFile}" />
		</java>

	</target>

</project>