<ui:repeat value="#{util:createArray(cc.attrs.length)}" var="index">•</ui:repeat>

public final class UIHelper {
    public static Object[] createArray(int size) {
        return new Object[size];
    }
}

<?xml version="1.0" encoding="UTF-8"?> <facelet-taglib
...
<function>
    <function-name>createArray</function-name>
    <function-class>package.UIHelper</function-class>
    <function-signature>Object[] createArray(int)</function-signature>
</function> </facelet-taglib>