Testing if DynaActionForm property is not empty using OR
===

I have dynaActionForm and the form contains two arrays(trip and route) in it. 

Now I need to check if the two arrays are not empty in my jsp page by doing an OR. 

    <logic:notEmpty property="trip" name="myForm"/>
    OR
    <logic:notEmpty property="route" name="myForm"/>

How can I do the above?
I tried the following using JSTL:
    <c:if test="${! empty(myForm.trip)}"> </c:if>

And it gives me an error saying that the property "trip" does not exist. I believe this is because my form is a DynaActionForm. 

Thank you. 