Re: [Springframework-developer] Petclinic updated

[<tri...@tr...>]

Ken,

Thanks, that makes it clearer.

It seems to me though that the bean factories support different default mappings
compared to what is provided in the binding of form fields.  I can map to an
Integer in a bean, but not in a form without getting into providing a custom
PropertyEditor.  Also, is there a way to distinguish betweeen a blank and an
invalid number - I get typeMismatch for both, but sometimes a blank could be OK.
 If we supported Integer, then that should map to a null, and I could do my on
validation in a Validator class.  Am I missing something here?

I have not spent a lot of time looking through the source code, but there seems
to be some additional mapping that we should provide in the default setup.  We
don't seem to support mapping a numeric string to a java.math.BigDecimal, but
that is something I think would be handy for entering monetary amounts etc.  If
anybody is already working on any of this, let me know - if not I'll spend some
more time adding some functionality.

Thomas

> Thomas,
> 
> Juergen showed me a way to handle a similar situation for Petclinic's 
> Date entry requirements.
> 
> <Juergen>
> 
> 
> You can easily replace the default error message by defining a 
> MessageSource, i.e. a "messages.properties" bundle or the like. If you 
> define a message for the key "typeMismatch" there, you'll see that 
> message in your form in case of an error with code "typeMismatch". You 
> can even define more specific messages like for "typeMismatch.myField" 
> or even "typeMismatch.myObject.myField" that will only get used on the 
> specified field resp. object and field. Of course this works with your 
> own error codes that your own validator produces too. See the FieldError 
> javadoc for details.
> 
> </Juergen>
> 
> The message gets triggered via an IllegalArgumentException thrown by the 
> PropertyEditor. The handler that catches the IllegalArgumentException 
> and triggers the message is doTypeConversionIfNecessary() in 
> BeanWrapperImpl. You may also want to have a look at 
> beans.propertyeditors.CustomNumberEditor. Petclinic's AbstractClinicForm 
> shows how to install a property editor in it's override of 
> BaseCommandController.initBinder().
> 
> Regards,
> Ken
> 
> tri...@tr... wrote:
> 
> >Ken and All,
> >
> >Are there any examples where the HTML Form has some input fields that are
> used
> >to enter numeric values.  What is the best way to handle non numeric input
> for
> >numeric fields?  I'm trying to bind to a commandObject that has a field that
> is
> >an integer.
> >
> >I have tried using an int and it works if I enter a number but if I leave
> the
> >field blank or enter an non nueric value, then I get the following error
> message
> >from the bind during validation:
> >
> >Failed to convert property value of type [java.lang.String] to required
> type
> >[int]; nested exception is: java.lang.NumberFormatException: For input
> string: ""
> >
> >Using an Integer it does not work at all - I get this error message:
> >
> >Failed to convert property value of type [java.lang.String] to required
> type
> >[java.lang.Integer]; nested exception is:
> java.lang.IllegalArgumentException:
> >argument type mismatch
> >
> >Thomas
> >
> >
> >  
> >
> 
>