----- Original Message -----
From: "Henri Yandell" <[EMAIL PROTECTED]>
To: "Jakarta Commons Developers List" <[EMAIL PROTECTED]>
Sent: Saturday, September 27, 2003 10:39 PM
Subject: [beanutils] some ideas
>
> I'm interested in the convert stuff. Especially the Object->String stuff.
Me too :) I'm just starting to play with this stuff and realize how
powerful it is.
> First a question on Dates. Why not support for java.util.Date? It seems
> that there's not much point having SqlDateConverter, it should just be
> DateConverter based on util.Date.
Good question; I can't guess why java.sql.Date would be provided and
java.util.Date would not (if anything, it seems like it should be the other
way around).
> Secondly...I think the Convert system needs improvement. The basic problem
> is highlighted by: ConvertUtils.register(Converter, Class).
> It ought to be: ConvertUtils.register(Converter, Class from, Class to).
I agree this may be more intuitive and easier to program, but I think the
current system does the job (see additional comments below).
> I want to register a Converter for Date->String and another for
> Date->sql.Timestamp.
I believe this is already possible. The calls would be
ConvertUtils.register(DateConverter, java.util.Date);
ConvertUtils.register(DateConverter, java.sql.Date);
Here is pseudocode for DateConverter:
DateConverter {
convert(Class toClass, Object input) {
if (toClass.equals(java.lang.String.class))
return input.toString();
else if (toClass.equals(java.sql.Date.class))
return new java.sql.Timestamp(((Date)input).getValue());
}
}
> Solutions could be either:
>
> 1) Improve the system for the mapping converters so it is many-to-many.
>
> 2) Create a hierarchy structure. A ConvertUtilsBeansConverter could be
> plugged in to handle a class, and would contain its own batch of
> Converters.
>
> Any ideas?
I think the Converter interface is fine, but could perhaps use some better
documentation and examples (in the JavaDoc... the converters in the
distribution seem more general-purpose than will be the converters a user
needs to create). I do like the idea of adding a new
ConvertUtils.register(Converter, Class from, Class to) method.
> Hen
Matt
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