What I agree is that objects have to be rich in information AND
associations. I don´t like(it´s just my opinion) reflecting my tables in my
Objects. Like, if I have a Category and a Product, I like to associate these
two objects, not just add productId in Category. About the methods, I had
all the types of fights with teachers in my graduation becoz they liked to
teach persistent methods inside POJOs. :S. DAOs were made to persist data,
not POJOs.
Best Regards
Rafael Mauricio Nami
2005/10/17, Frank W. Zammetti <[EMAIL PROTECTED]>:
>
> So, is another way of saying what your saying is that you feel that
> DTO+DAO=Something Good(tm)?
>
> So, if instead of having:
>
> class CustomerDTO {
> private String firstName;
> private String lastName;
> private String id;
> public setFirstName(String);
> public setLastName(String);
> public setId(String);
> public getFirstName(String);
> public getLastName(String);
> public getId(String);
> }
> class CustomDAO {
> public createCustomer(CustomerDTO c);
> public getCustomer(String id);
> public updateCustomer(CustomerDTO c);
> public deleteCustomer(String id);
> }
>
> ...you instead have...
>
> class Customer {
> private String firstName;
> private String lastName;
> private String id;
> public setFirstName(String);
> public setLastName(String);
> public setId(String);
> public getFirstName(String);
> public getLastName(String);
> public getId(String);
> public createCustomer();
> public getCustomer(String);
> public updateCustomer();
> public deleteCustomer();
> }
>
> Is that roughly what your saying? If so, I don't think I disagree and
> would be interested to hear why anyone thinks it's NOT a good idea.
>
> --
> Frank W. Zammetti
> Founder and Chief Software Architect
> Omnytex Technologies
> http://www.omnytex.com
> AIM: fzammetti
> Yahoo: fzammetti
> MSN: [EMAIL PROTECTED]
>
> On Mon, October 17, 2005 12:00 pm, Rafael Nami said:
> > [EMAIL PROTECTED] said:
> > *"I think it is best to use directly domain objects, i.e. ye old (but
> > good)
> > OOP with "real" objects."*
> > **
> > +1 :)
> > Best Regards
> >
> > Rafael Mauricio Nami
> >
> >
> > 2005/10/17, [EMAIL PROTECTED] <[EMAIL PROTECTED]>:
> >>
> >> I'm not a guru but...
> >> Once I thought that DTOs are a nice way to separate the webapp's
> layers,
> >> just because they are simply data containers and have no logic.
> >> But now I think they are completely useless, because they have no
> logic!
> >> I
> >> know it is stupid to use the same answer for two opposite points of
> >> view.
> >> The cause of my change-of-mind is the so-called "anhemic programming"
> >> that
> >> DTOs promote.
> >> I think it is best to use directly domain objects, i.e. ye old (but
> >> good)
> >> OOP with "real" objects. Someone could say that this breaks security,
> >> but
> >> I don't think so, because security will be broken only with a misuse of
> >> these objects (e.g. calling business methods in JSPs).
> >> I am sure that many developers of the list agree with me, and many
> >> others
> >> don't.
> >> I think that the "ease of code" principle must be followed, then DTOs
> >> are
> >> simply a loss of time, IMO.
> >> Ciao
> >> Antonio Petrelli
> >>
> >> [EMAIL PROTECTED] wrote:
> >>
> >> >Hi, Gurus,
> >> >
> >> >Background: I just started a Struts project with Hibernate. I have
> >> chosen to use the Data Access Object with (Abstract Factory) design
> >> pattern because my client uses Oracle and I use Postgresql database. I
> >> am
> >> working with other teams remotely and they decided to use DTO.
> >> >
> >> >Problem: A few months ago, I recall a message thread on this list with
> >> a
> >> subject header of: 'DTOs are evil'. Since I am new to this, I am having
> >> problems understanding why. I thought that DTO are for data storage and
> >> data transfer between Business and Value Objects.
> >> >
> >> >Questions: I have the following questions:
> >> >
> >> >1. Why I shouldn't choose it?
> >> >
> >> >2. Should I be using the Apache Commons BeanUtils in my action? It has
> >> a
> >> method like BeanUtils.copyProperties(...).
> >> >
> >> >3. If not BeanUtils, then what do you recommend?
> >> >
> >> >
> >> >Thanks,
> >> >
> >> >Bob
> >> >
> >> >__________________________________________________
> >> >Do You Yahoo!?
> >> >Tired of spam? Yahoo! Mail has the best spam protection around
> >> >http://mail.yahoo.com
> >> >
> >>
> >>
> >>
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> >>
> >>
> >
>
>
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