Converting struts1 tag to struts2 null handling

The following struts 1 code evaluates to true when row.type is null. The same I converted into struts2 as below but it evaluates to false when row.type is null. How to make this true when #row.type is null. - To unsubscr

s:select selected option from a list based on a condition

I have a select tag as above. The Student object has a boolean value defaultStudent with getter isDefaultStudent. How to pre-select the default student based on this boolean value. Value accepts only static value, not condition.