> -----Original Message-----
> From: Leandro Melo [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, September 08, 2004 4:28 PM
> To: Struts Users Mailing List
> Subject: Re: ActionForm data type X BeanUtils -> using Dates
>
>
> I got one doubt in your code when used in a situation
> that i mentioned (transforming data from action form
> to dto).
> When date comes from action form, they usually come in
> Strings, but in your method you verify
>
> value instanceof Date...
Bi-directional conversion. Look at what he does if it is a date. This isn't just for
ActionForm to DTO, it's for any other time you have to convert a string to a date
using BeanUtils.
>
> This will never happen, as the value comes in String.
>
> Am i saying something stupid???
Not really... just not being generic enough for the solution.
>
> I'm not saying your code is wrong, but not appropriate
> for the situation in question.
>
> Am i right?
Sorta :)
>
>
> --- Bryce Fischer <[EMAIL PROTECTED]>
> escreveu:
> > The custom converter is done independently of the
> > action, form or DTO.
> >
> > First step is to implement the interface
> > org.apache.commons.beanutils.Converter.
> >
> > Keep in mind that the converter you are writing uses
> > the appropriate
> > converter for the original class. So, if you were
> > converting from a
> > String to a Date, you would create a String
> > converter. And vice versa,
> > if you were converting from a Date to a String you
> > would create a Date
> > converter. Example below
> >
> > Then, to override the standard converters, you call:
> > ConvertUtils.register(<Your converter class>, <class
> > to use converter
> > on>.class);
> >
> > First parameter is your new converter, and the
> > second is the class its
> > used for. I call this in a static initializer of a
> > utility class, you
> > just need to make sure its called before any
> > validations occur, and it
> > only needs to be done once.
> >
> > Since we are interested in customizing conversions
> > from String to Date,
> > I override the String converter:
> >
> > public class StringConverter implements Converter{
> > public Object convert(Class type, Object value) {
> > Object returnObj = null;
> > if (value != null) {
> > if (value instanceof Date){
> > returnObj =
> > dateFormatter.format((Date)value);
> > } else if (value instanceof BigDecimal){
> > returnObj =
> > decimalFormatter.format((BigDecimal)value);
> > } else {
> > returnObj = value.toString();
> > }
> > }
> >
> > return returnObj;
> > }
> > }
> >
> > I've left out some properties, their getters and
> > setters, but I think
> > you get the gist of what I'm doing. Now, I register
> > this converter as such:
> >
> > ConvertUtils.register(new StringConverter(),
> > String.class);
> >
> > I actually have a utility class, where the register
> > is done in the
> > static initializer. I suppose another way would be
> > to use a servlet that
> > loads prior to Struts.. Or if your Actions have a
> > base class, etc...
> >
> > Maybe there's a more elegant way of doing that. This
> > is what I've come
> > up with. If someone has a better way, post please,
> > I'm always looking
> > for more elegant ways of accomplishing stuff like
> > this.
> >
> > Jason King wrote:
> >
> > > Could you point us at some code that does this?
> > Do you customize in
> > > the action, the form or the DTO?
> >
> >
> >
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>
>
>
>
>
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