2.7.7.  Example

This simple example tests if the java runtime version is 1.4 (or higher). Otherwise fails with an error message. The comparison is done numerical.

build.xml

<?xml version="1.0"?>

<project basedir="." name="properties-test" default="main">

<taskdef classpath="orangevolt-ant-tasks-1.3.2.jar" resource="com/orangevolt/tools/ant/taskdefs.properties"/>

<target name="main">

<compare arg1="${ant.java.version}" arg2="1.4" numeric="true">

<lesser property="lesserThanJava14"/>

</compare>

<fail if="lessThanJava14">

java version 1.4 or higher is required !

</fail>

</target>

</project>

You can use multiple inner elements with same comparison at once. Defining multiple <lesser> elements inside compare for example is allowed.