Struts 2 - Conditional Validation

My form contains a checkbox and a text field. Entering a value in the text field is mandatory only if the checkbox is selected. How to write the conditional validation for this? I tried the validation entry as below but it is not working– (checkbox == true) and

Help with S:Select

I have a select tag defined as - Does anyone has a working example of how to read the multiple values of an object type (here Project) selected from the select box in the action method? Also, do I need to use a converter as the collection being passed to populate the list items contains the o