empty EL expression on JSF datatable var attribute's field always false
问题 I have the following EL expression which references a property on the var attribute: empty _item.addressLine1 addressLine1 is a String property on the Address bean, which is accessed via the personBean.person.addresses property which returns a Set<Address> . Here is the EL expression in context: <h:dataTable id="personBeanPersonAddresses" styleClass="data-table" value="#{forgeview:asList(personBean.person.addresses)}" var="_item"> <h:column> <f:facet name="header"> <h:outputText value=