<mvc:annotation-driven/> and binding to collections

[jtsnr]

Since including <mvc:annotation-driven/> I have experienced a problem when binding the selections of multi-select list box to its corresponding list property on the command bean. Before introducing <mvc:annotation-driven/> it worked correctly.

I have a custom collection editor:

@InitBinder
public void initBinder(WebDataBinder binder) {
   binder.registerCustomEditor(List.class, new CustomCollectionEditor(List.class) {
      protected Object convertElement(Object element) {			
         String fieldName = (String)element;

         for (Field field : fields) {
            if (field.getFieldName().equals(fieldName))
               return field;
         }
				
         return element;
      }
   });
}

which previously would result in the form controller receiving a List<Field> representing the list selections. However, since using the <mvc:annotation-driven/> what I now get is a List<List<Field>>.

Can anyone help shed light on this behaviour?

[icfantv]

It sounds like the List<...> is implicit, meaning you get it for free - which would make sense considering you're talking about a select box.

[jtsnr]

Answer is here:

http://stackoverflow.com/questions/8...to-collections