how to test symlinks with ant 1.9 - ant

Question

I need to perform a command if the jar file is a file instead of a symlink. I have found a solution that works only with ant 1.10.
Does anyone know how to do it with ant 1.9 ?
Here is my build.xml.
<?xml version="1.0"?>
<project name="AsterixDecoder" default="bm" basedir=".">
<!-- set global properties for this build -->
<property name="src" location="src"/>
<property name="build" location="build"/>
<property name="dist" location="dist"/>
<property environment="env"/>
<condition property="exists.CCM_ADDR">
<isset property="env.CCM_ADDR"/>
</condition>
<target name="compile" description="compile the source " >
<mkdir dir="${build}"/>
<javac srcdir="${src}" destdir="${build}" includeantruntime="false"/>
<mkdir dir="${build}/resources"/>
<copy todir="${build}/resources">
<fileset dir="resources"/>
</copy>
</target>
<target name="checkout" if="exists.CCM_ADDR">
<ccmcheckout file="${dist}/AsterixDecoder.jar"/>
</target>
<target name="dist" depends="compile, checkout"
description="generate the distribution" >
<jar jarfile="${dist}/AsterixDecoder.jar" filesetmanifest="mergewithoutmain">
<manifest>
<attribute name="Main-Class" value="fr.eurocontrol.escape.ground.asterixdecoder.AsterixDataTree"/>
<attribute name="Class-Path" value="."/>
</manifest>
<fileset dir="${build}"/>
</jar>
</target>
<target name="check.symlink">
<fileset dir="${dist}" id="fileset" includes="AsterixDecoder.jar">
<symlink/>
</fileset>
<pathconvert refid="fileset" property="is.symlink" setonempty="false"/>
</target>
<target name="reconcile" depends="check.symlink" if="exists.CCM_ADDR" unless="is.symlink">
<exec executable="ccm">
<arg value="reconcile"/>
<arg value="-udb"/>
<arg value="${dist}/AsterixDecoder.jar"/>
</exec>
</target>
<target name="bm" description="build management" depends="dist, reconcile">
</target>
</project>
Do not hesitate to make any suggestion of improvements. I am still a beginner in writing ant files.

Answer 1

The most straightforward way to do this would be to use the record function of Ant's symlink task. This creates a property file that lists all of the symlinks found within a given resource collection. Here's an example target:
<target name="default">
<symlink link="testdir" resource="build" />
<symlink action="record" linkfilename="links.record">
<fileset dir="." includes="*" />
</symlink>
<property file="links.record" />
<condition property="testdir.is.symlink">
<isset property="testdir" />
</condition>
<echo message="${testdir.is.symlink}" />
</target>