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From Prasanth <>
Subject Re: Invalid Field Value when using Map
Date Fri, 21 Jun 2019 13:57:08 GMT
Hi Yasser,

The conversion error occurs when the field is not a map. I have a form with int/long fields,
if the user enters non numeric value the form display error.

The actions are validation aware and the control does come to validation method. It is in
the validation method that I usually get exceptions  as the code is expecting to have a Double
but the type of 
the object in the map is a String. I have tried to check in the validate method if the object
is of type Double and if it is not a Double add a field error. When I do that OGNL seems to
have an issue 
when displaying the input form with the values in the map. Seems like OGNL is now expecting
a Double value and is not able to handle a String object being present in the map. The JSP
stops at the 
field which has String value.

So even if I add additional validations to make sure all values in the map are Doubles it
would still cause a problem as Struts would not be able to display the input form.


On 6/21/19 1:23 AM, Yasser Zamani wrote:
> Oh interesting!
> Have you seen [1]? e.g. conversion error interceptor should be present
> in your interceptor stack. To debug, for example put a number field
> which is not a map and see if conversion error appears - I think you
> should also have fieldErrors tag in your jsp.
> It seems your action also should be ValidationAware. Put a break-point
> at [2] and see if your code reaches there and what happens next.
> Regards.
> [1]
> [2]
> On 6/19/2019 10:35 PM, Prasanth Pasala wrote:
>> Hi Yasser,
>> I think at run time you can add any type of objects you want to the map.
>> The checks are only at compile time on the data types of objects added
>> to Maps.
>> Thanks,
>> Prasanth
>> On 6/19/19 1:29 AM, Yasser Zamani wrote:
>>> Hi Prasanth,
>>> I'm surprised how you get non digit characters in your map while both
>>> key and value are not String!
>>> Regards.
>>>> -----Original Message-----
>>>> From: Prasanth <>
>>>> Sent: Monday, June 17, 2019 8:52 PM
>>>> To: Struts Users Mailing List <>
>>>> Subject: Invalid Field Value when using Map
>>>> Hi,
>>>> I have a form that uses maps to store data as shown below. When the
>>>> user enters
>>>> valid numbers it works as expected, but when user enters non digit
>>>> characters in
>>>> the text field a String object is saved in the map rather than
>>>> showing a "Invalid
>>>> field value for field <field name>" message which is done for basic
>>>> data types like
>>>> int/long/double. Is this something that struts has not implemented
>>>> for maps yet,
>>>> as the annotations provide the expected data type?
>>>>       @Element(value=java.lang.Double.class)
>>>>       private HashMap<Long, Double> deferralAmountValue = new
>>>> HashMap<Long,Double>();
>>>>       @Element(value=java.lang.Double.class)
>>>>       private HashMap<Long, Double> deferralPercentValue = new
>>>> HashMap<Long,Double>();
>>>> Thanks,
>>>> Prasanth
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