To add to Thiago's golden words, you can have a simple ListValueEncoder for
using index/toString() like this
class ListValueEncoder<T>(){
final private List<T> values;
public ListValueEncoder(List<T> values){
this.values = values;
}
public String toClient(T value){
return values.indexOf(value);
}
public Value toValue(String index){
return values.get(Integer.parseInt(index));
}
}
(Yes, you have to ensure equals() and hash() are properly overridden)
regards
Taha
On Mon, Feb 21, 2011 at 10:43 PM, Thiago H. de Paula Figueiredo <
thiag...@gmail.com> wrote:
> On Mon, 21 Feb 2011 14:05:25 -0300, robnangle <robnan...@gmail.com> wrote:
>
> I am not using tapestry-hibernate, is there any examples out there because
>> the few I have came across seem to be very complex?
>>
>
> There are some examples out there that I consider the wrong approach,
> specifically implementing both ValueEncoder and SelectModel in the same
> class.
>
> Suppose you have a class User and a DAO for it named UserDAO (not tested):
>
> class UserValueEncoder<User>() {
> final private UserDAO dao;
> public UserValueEncoder(UserDAO dao) {
> this.dao = dao;
> }
> public String toClient(User user) {
> return user.getLogin();
> }
>
> public User toValue(String clientValue) {
> return dao.findByLogin(clientValue);
> }
> }
>
> @Property
> private User user;
>
> <select t:type="Select" value="user" .../>
>
> You could use any logic for that. For example, you could use the user id
> instead of login and your application would behave exactly the same.
>
>
> --
> Thiago H. de Paula Figueiredo
> Independent Java, Apache Tapestry 5 and Hibernate consultant, developer,
> and instructor
> Owner, Ars Machina Tecnologia da Informação Ltda.
> http://www.arsmachina.com.br
>
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