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From "J. Garcia" <>
Subject conversion error repopulation not working
Date Wed, 23 May 2012 18:34:10 GMT

In order to implement a good user experience, I am trying to put into
practice the conversion validator, as documented here:

The ideal would be: a form with one integer field. If the user enters a non
valid integer, the value remains in the input field and the user is
informed of the error like this:
Invalid value '198o' for field 'Year'. (notice the letter at the end).

For this, I declare the conversion-validator, and have to remove the
conversionError from the interceptors stack.
While debugging, the class ConversionErrorFieldValidator builds a map, with
the full fieldName and the entered value.
The method repopulateField from
RepopulateConversionErrorFieldValidatorSupport is run, which in theory
repopulates the stack with this code:

            if (doExprOverride) {
                invocation.addPreResultListener(new PreResultListener() {
                    public void beforeResult(ActionInvocation invocation,
String resultCode) {
                        ValueStack stack =

However, when showing the jsp for user input, the invalid value is not in
the form input field. It does not seem to work as documented in the
mentioned url.


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