I have a class called OrderItem which is annotated on its units property with Hibernate Validator as follows:

@Entity
@Table(name = "ORDER_ITEM")
public class OrderItem {
.
.
.

   @Column(name = "UNITS", nullable = false)
   @NotNull
   @Min(value=1, message = "Need 1 or more units for each item.")
   public BigInteger getUnits() {
      return units;
   }
.
.
.
}

Meanwhile, on the front end I have a table of these OrderItems, and the units property is editable in a text box.  When the text box is updated, I want either of the following to happen:

1. Make sure the value in the text box is greater than 1 and if not display a faces message


2. If the value is valid, then update two other parts of the table that contain totals.

Here is the portion of my facelet that describes this:

<rich:column>
            <th type="text" jsfc="h:inputText" value="#{orderItem.units}" id="unitsBox">
               <s:validate/>
               <a4j:support event="onblur" reRender="unitsBox,orderItemTotal,orderTotal" />
            </th>
</rich:column>

The totals get updated just fine with a valid value.  However, when the value is invalid, nothing happens.  Not until I do a conventional submit and return immediately to this page do I see the faces message specified in Hibernate Validator on the OrderItem entity.

How can I get the validation done Ajax-ly along with the totals?

Thanks.