Question

I am getting an javax.el.ELException: java.lang.Short cannot be cast to java.lang.Long for the following code:

<ui:param name="aumSegmentType" value="#{segmentSetup.userSegmentTypes[2]}" />

I am using Mojarra 2.1, facelets.

Answer 1

That’s not possible. Numbers are in EL by specification treated as Long.

If changing the map key type isn’t an option, then you need to create a method which takes a long and casts it to short.

public SomeObject getUserSegmentType(long key) {
    return userSegmentTypes.get((short) key);
}

and use it as follows

<ui:param ... value="#{segmentSetup.getUserSegmentType(2)}" />

I of course assume that your environment already supports EL 2.2. It should, given the fact that you’re using JSF 2.1.

Note that this problem is unrelated to JSF/Facelets.