How to have multiple if cases in a condition statement in Ant
You can use separate conditions and rely on the fact that properties are immutable
<condition property="prop" value="1">
<equals arg1="${param1}" arg2="one"/>
</condition>
<condition property="prop" value="2">
<equals arg1="${param1}" arg2="two"/>
</condition>
...
and add a regular property for the final else
<property name="prop" value="else">