<?xml version="1.0" encoding="UTF-8"?>

 <project name="Build Script" default="test" basedir=".">

     <target name="clean">

         <delete dir="build"/>

     </target>

     <target name="compile" depends="build"/>

     <target name="build" depends="-libraries">

         <antcall target="-build-one">

             <param name="version" value="api1.0"/>

         </antcall>

         <antcall target="-build-one">

             <param name="version" value="api2.0"/>

         </antcall>

         <antcall target="-build-one">

             <param name="version" value="test"/>

             <param name="cp" value="build/api1.0/classes:${junit.jar}"/>

         </antcall>

         <echo level="info" message="Next compilation will fails, as adding methods into interface is not binary compatible"/>

         <antcall target="-build-one">

             <param name="version" value="test"/>

             <param name="out" value="will-not-compile"/>

             <param name="cp" value="build/api2.0/classes:${junit.jar}"/>

             <param name="failonerror" value="false"/>

         </antcall>

         <antcall target="-build-one">

             <param name="version" value="test2.0"/>

             <param name="cp" value="build/api2.0/classes:build/test/classes:${junit.jar}"/>

         </antcall>

     </target>

     <target name="test" depends="build">

         <echo level="info" message="PrintVisitor on old API. This should succeeds."/>

         <antcall target="-run-one">

             <param name="version" value="api1.0"/>

         </antcall>

         <echo level="info" message="PrintVisitor on old API. This would not compile, but it runs as it does not deal with minus at all."/>

         <antcall target="-run-one">

             <param name="version" value="api2.0"/>

         </antcall>

         <echo level="info" message="PrintVisitor on new API. This yields runtime error."/>

         <antcall target="-run-one">

             <param name="test" value="test2.0"/>

             <param name="extra.cp" value="build/test/classes"/>

             <param name="version" value="api2.0"/>

         </antcall>

     </target>

     <!-- support methods -->

     <target name="-libraries">

         <ant dir="../../libs/"/>

         <property name="junit.jar" location="../../libs/dist/junit-4.4.jar"/>

     </target>

     <target name="-run-one">

         <fail message="You need to specify API version number" unless="version"/>

         <property name="test" value="test"/>

         <mkdir dir="build/${test}results${version}"/>

         <junit dir="build/test/classes" errorproperty="tests.failed" failureproperty="tests.failed" fork="true" showoutput="true">

             <batchtest todir="build/${test}results${version}">

                 <fileset dir="build/${test}/classes">

                     <filename name="**/*Test.class"/>

                 </fileset>

             </batchtest>

             <classpath>

                 <path location="build/${version}/classes"/>

                 <path location="build/${test}/classes"/>

                 <path location="${junit.jar}"/>

                 <path path="${extra.cp}"/>

             </classpath>

             <formatter type="brief" usefile="false"/>

             <formatter type="xml"/>

         </junit>

     </target>

     <target name="-build-one">

         <fail message="You need to specify version number" unless="version"/>

         <property name="cp" value=""/>

         <property name="out" value="${version}"/>

         <property name="failonerror" value="true"/>

         <mkdir dir="build/${out}/classes"/>

         <javac 

             srcdir="src-${version}" 

             destdir="build/${out}/classes" 

             source="1.5" target="1.5"

             classpath="${cp}"

             failonerror="${failonerror}"

         />

     </target>

 </project>