Question

Is it possible to cast using EL?

I’ve got a class Vehicle, and two other classes Car and Bus that extends Vehicle.
I’m searching for all Vehicles and there’s some data that has in Bus but does not have in Car.

So I was trying to show things from Car when it’s a Car and things from Bus when it’s a Bus.

How could I do it, Cast, instanceof? And How would I do it, cause i’m kinda lost here.

Thanks

Answer 1

You can use ${obj.class.simpleName == 'Car'} but it’s not the best thing thing to do.

Perhaps you can have a geType() abstract method and use it to differentiate. For example:

<c:forEach items="${vehicles}" var="vehicle">
   Reg.No: ${vehicle.registrationPlateNumber}
   <c:if test="${vehicle.type == 'bus'}">
      Toilets: ${vehicle.toilets}
   </c:if>
</c:forEach>