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

<project name="co-contra-variance" default="run" basedir=".">

    <target name="clean">

        <delete dir="build"/>

    </target>

    <target name="test" depends="run"/>

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

    <target name="build">

        <antcall target="-build-one">

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

        </antcall>

        <antcall target="-build-one">

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

        </antcall>

        <echo level="info" message="Compiling the test against Version 1.0 of the API. This should succeeds."/>

        <antcall target="-build-one">

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

            <param name="output" value="impl-with-1.0"/>

            <param name="cp" location="build/api1.0/classes"/>

        </antcall>

        <echo level="info" message="Compiling the test against Version 2.0 of the API. This should succeeds."/>

        <antcall target="-build-one">

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

            <param name="output" value="impl-with-2.0"/>

            <param name="cp" location="build/api2.0/classes"/>

        </antcall>

    </target>

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

        <echo level="info" message="Running the test compiled with version 1.0 of the API against version 1.0 of the API. This should succeeds."/>

        <antcall target="-run-one">

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

            <param name="testversion" value="impl-with-1.0"/>

            <param name="result" value="0"/>

        </antcall>

        <echo level="info" message="Running the test compiled with version 2.0 of the API against version 2.0 of the API. This should succeeds."/>

        <antcall target="-run-one">

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

            <param name="testversion" value="impl-with-2.0"/>

            <param name="result" value="0"/>

        </antcall>

        <echo level="info" message="Mixing should not work: Running the test compiled with version 1.0 of the API against version 2.0 of the API. This should fail."/>

        <antcall target="-run-one">

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

            <param name="testversion" value="impl-with-1.0"/>

            <param name="result" value="1"/>

        </antcall>

        <echo level="info" message="Mixing does not work: Running the test compiled with version 2.0 of the API against version 1.0 of the API. This should fail."/>

        <antcall target="-run-one">

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

            <param name="testversion" value="impl-with-2.0"/>

            <param name="result" value="1"/>

        </antcall>

    </target>

    <!-- support methods -->

    <target name="-run-one">

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

        <java classpath="build/${version}/classes:build/${testversion}/classes" classname="test.ContravarianceTest"

            resultproperty="result.real" failonerror="false" fork="true"

        />

        <fail message="Unexpected failure for ${version}: ${result.real}">

            <condition>

                <not>

                    <equals arg1="${result}" arg2="${result.real}"/>

                </not>

            </condition>

        </fail>

    </target>

    <target name="-build-one">

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

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

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

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

        <javac 

            srcdir="src-${version}" 

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

            source="1.6" target="1.6"

            classpath="${cp}"

            includeantruntime="false"

        />

    </target>

</project>