The Alternator Viewtool is an Apache Velocity utility class for easily alternating over values in a list.
Toolbox.xml Configuration
The following example shows how the Alternator Viewtool is mapped in the toolbox.xml file:
<tool>
<key>alternator</key>
<scope>application</scope>
<class>org.apache.velocity.tools.generic.AlternatorTool</class>
</tool>