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https://issues.apache.org/jira/browse/LABS-378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12755428#action_12755428
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Simone Gianni commented on LABS-378:
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Problem here is that there are many parties involved :
- The converter tells how many chars it could eventually support, depending on
data type solely
- The validators tells how many chars they will probably be, depending on
explicit length
- Formatters tells how many chars will be needed depending on format
The three does not talk to each other, but each modifies the length in
PropertyInfo, not in any specific order. PropertyInfo coordinates by simply
taking the lower one.
So considering the example of @Range(max=2000) on a double formatted as
currency :
- The converter returns 20 as the maximum length of a double, cause it does not
know that it's limited to 2000, and even if known it could have a high number
of decimals
- The validator returns 4, cause it does know that it's a double, and even if
known it would return 20 cause it could have decimals
- The formatter returns 20, cause it knows that only 2 decimals are possible,
but does not know that it's limited to 2000
In this specific case, the formatter should be able to declare a "delta" on the
length, something like "+3, cause it has a point followed by two decimals". But
would this be a solution for this specific case only?
> [conversion] When a double field has both a format currency and a range
> limit, incorrect length is used on text field.
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: LABS-378
> URL: https://issues.apache.org/jira/browse/LABS-378
> Project: Labs
> Issue Type: Bug
> Components: Magma
> Affects Versions: Current
> Reporter: Simone Gianni
> Fix For: Current
>
>
> @Format("currency-EUR")
> @Range(max=2000)
> public double getPrice() { ... }
> Will produce a field having maxsize="4", able to accomodate "1000" but not
> "1000.01"
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