Adam, I think Nick was just asking about the trip from the server to the client, not from the client to the server. As already discussed, the method for transfering user input to the business tier would be to copy the values from the action form to the appropriate DTO's using BeanUtils or some other method.
robert > -----Original Message----- > From: Adam Hardy [mailto:[EMAIL PROTECTED] > Sent: Thursday, March 18, 2004 4:57 AM > To: Struts Users Mailing List > Subject: Re: action - delegate - facade > > > Downside is though, trying to cram string request parameters into your > DTO in your form before you validate them. Causes ugly exception > messages on the browser. > > On 03/18/2004 02:25 AM Robert Taylor wrote: > > Well, I would say it depends. If I had a DTO ( a domain object) which had all the > > fields > > I needed to display...including types like int, Date, boolean, etc... I would > > probably just > > pass that along to the form bean and let view helpers like the Struts tags or JSTL > > render > > the contents. With JSTL you can format Dates and numbers. I believe those tags > > leverage the > > java.text.* package for formatting data. > > > > If I needed to perform some specialized formatting which could not be done by > > view helpers then I may just convert the necessary fields to Strings (maybe using > > BeanUtils) > > format them, and populate my ActionForm. > > > > If the view I needed of the data was not encapsulated in a single DTO, then > > you could retrieve multiple DTO objects and rendered them as described above or > > use a pattern > > described as Transfer Object Assembler which builds a custom DTO or a collection > > of customer DTO > > objects which you could pass along to the ActionForm. > > > > You can read more about Transfer Object Assembler here: > > http://java.sun.com/blueprints/corej2eepatterns/Patterns/TransferObjectAssembler.html > > > > robert > > > > > >>-----Original Message----- > >>From: Nick Wesselman [mailto:[EMAIL PROTECTED] > >>Sent: Wednesday, March 17, 2004 6:28 PM > >>To: Struts Users Mailing List > >>Subject: Re: action - delegate - facade > >> > >> > >>What about when simply displaying data on a page? Do developers > >>typically copy data out of the domain object just to display it? (As > >>opposed to using it w/ a form.) > >> > >>The only issue I see is that you may end up introducing view helper > >>methods to your model beans. > >> > >>Nick > >> > >>Robert Taylor wrote: > >> > >> > >>>Adam, its frowned upon to pass a web tier object (XXXXActionForm) into the > >>>business > >>>tier. I believe a widely used technique is to use BeanUtils to copy the properties > >> > >>>from the XXXXActionForm to a DTO (a Domain Object) which can be passed to the > >> > >>>business tier. > >>> > >>>robert > >>> > >>> > >>> > >> > >> > >> > >>--------------------------------------------------------------------- > >>To unsubscribe, e-mail: [EMAIL PROTECTED] > >>For additional commands, e-mail: [EMAIL PROTECTED] > >> > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > -- > struts 1.1 + tomcat 5.0.16 + java 1.4.2 > Linux 2.4.20 Debian > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
