Validating collections

Hello again,

I have another question.  This time I have a collection of Strings, and I want to apply a regex validator to all the elements.  The form winds up looking something like:

<input type="text" name="zipCodes[0]" />
<input type="text" name="zipCodes[1]" />
<input type="text" name="zipCodes[2]" />

And my Action has a property an it that is a List<String> called zipCodes with appropriate accessors.  Is it enough to specify a field validator and like:

<code>
<field name="zipCodes">
    <field-validator type="regex">
       <param name="expression"><![CDATA[(^[0-9]{5}?$)]]></param>
    </field-validator>
</field>
</code>

Thanks,
Rich
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