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Date: Sat, 27 Sep 2003 13:47:25 -0400 (EDT)
From: Henri Yandell <bayard@generationjava.com>
To: Jakarta Commons Users List <commons-user@jakarta.apache.org>
Subject: Re: [BeanUtils] confused over usage of ConvertUtils [SOLVED]
In-Reply-To: <01be01c38515$9fc52250$7001a8c0@radpbi.bah.com>
Message-ID: <Pine.LNX.4.44.0309271344230.4354-100000@umbongo.flamefew.net>
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On Sat, 27 Sep 2003, Sgarlata Matt wrote:

> That's what I was thinking, which made me very displeased because I felt
> that ConvertUtils should be able to do this formatting automagically.
>
> Fortunately, ConvertUtils *is* automagical; we just weren't thinking about
> Converters correctly :)  To go from String -> Date one uses a DateConverter,
> so of course to go from Date -> String one uses a StringConverter.  Isn't
> symmetry great?  It's funny neither of us realized this at first.

Not really. StringConverter's javadoc says that it takes a String and
makes it a String. The implementation probably just calls .toString() on
the Object, which isn't really what would be wanted.

[quick peek shows:

        if (value == null) {
            return ((String) null);
        } else {
            return (value.toString());
        }
]

I'd want a getFormatted() method on BeanUtils which uses a FormatUtils to
handle Object->String in the same way ConvertUtils handles String->Object.

Hen

> ----- Original Message -----
> From: "Henri Yandell" <bayard@generationjava.com>
> To: "Jakarta Commons Users List" <commons-user@jakarta.apache.org>
> Sent: Saturday, September 27, 2003 1:19 AM
> Subject: Re: [BeanUtils] confused over usage of ConvertUtils
>
>
> >
> > I could be utterly wrong here, but I've always thought the Convert stuff
> > was String->Object, even though the API is convert(Class, Object);Object.
> > I think the second parameter is effectively a String for uses within
> > beanutils.
> >
> > For Object->String, you would basically want to be looking at a Formatter
> > library [java.text.Format, with DateFormat being obvious choices].
> >
> > Dunno though, could be a lot going on I haven't looked at much in
> > BeanUtils. Still trying to understand the whole Locale section.
> >
> > Hen
> >
> > On Fri, 26 Sep 2003, Sgarlata Matt wrote:
> >
> > > I'm sure this is a simple question, but I am quite confused.  I am
> trying to
> > > do two things using ConvertUtils
> > > 1) Convert a String of the form "19 September 2003" to a Date
> > > 2) Convert a Date to a String of the form "19 September 2003"
> > >
> > > #1 (String -> Date) I can do no problem with my own custom Converter
> class.
> > > Does anyone know how to do #2 (Date -> String) automatically with
> > > ConvertUtils?
> > >
> > > Thanks!
> > >
> > > Matt
> > >
> > >
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> >
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>
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