Re: [T5.1] @SessionState an generic pages
protected ClassT getValueClass()
{
return (ClassT) ((ParameterizedType)
getClass().getGenericSuperclass()).getActualTypeArguments()[0]; }
I use something similar in DAOs, idea came from here:
https://www.hibernate.org/328.html
Thanks!! Had an abstract getEntityClass() method for my repositories as well.
Never liked it.. and now I am able to get rid of them :-)
Piero
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Re: Re: [T5.1] @SessionState an generic pages
Hi Thiago,
Hi Hammer! :)
Friends call me nille.
Hey! That's my open source code being used by someone besides me! Nice. :D
Just trying to learn from the masters ;-)
.Maybe the solution to what you want to do is to use
ApplicationStateManager directly.
That's the trick! Thinking about your hint I rewrote GenericEntityPageT a
bit. Code follows:
public abstract class GenericEntityPageT extends AbstractPage {
@Inject
private ApplicationStateManager manager;
public T getValue() {
return this.manager.get(this.getValueClass());
}
protected void setValue(final T value ) {
this.manager.set(this.getValueClass(), value);
}
public boolean isValueExists() {
return this.manager.exists(this.getValueClass());
}
@OnEvent(value = EventConstants.ACTIVATE)
Object checkValueExists() {
if (!this.isValueExists()) {
return this.getForwardPage();
}
else {
return null;
}
}
/**
* @return the page to be forwarded to in case value does not exist as
SSO
*/
protected abstract Object getForwardPage();
/**
* @return the value's class in the implementing page
*/
protected abstract ClassT getValueClass();
}
Now it works like a charm. MuitÃssimo obrigado for putting me on the right
track.
nillehammer
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Re: Re: [T5.1] @SessionState an generic pages
On Tue, 23 Jun 2009 22:32:25 +0200, nille hammer
tapestry.nilleham...@winfonet.eu wrote:
That's the trick! Thinking about your hint I rewrote GenericEntityPageT a
bit. Code follows:
/**
* @return the page to be forwarded to in case value does not exist as
SSO
*/
protected abstract Object getForwardPage();
/**
* @return the value's class in the implementing page
*/
protected abstract ClassT getValueClass();
Actually, getValueClass() doesn't have to be abstract. It can look like this:
protected ClassT getValueClass()
{
return (ClassT) ((ParameterizedType)
getClass().getGenericSuperclass()).getActualTypeArguments()[0];
}
I use something similar in DAOs, idea came from here:
https://www.hibernate.org/328.html
Martin
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Re: Re: Re: [T5.1] @SessionState an generic pages
Hi Martin,
thanks for the hint.
protected ClassT getValueClass()
{
return (ClassT) ((ParameterizedType)
getClass().getGenericSuperclass()).getActualTypeArguments()[0];
}
I use something similar in DAOs, idea came from here:
https://www.hibernate.org/328.html
Similar to the example you provided, I have erased the method and use a field
now. This way the value's class needn't be calculated several times but only
once at page instanciation.
/**
* the value's class in the implementing page
*/
@SuppressWarnings(unchecked)
private final ClassT classOfValue = (ClassT) ((ParameterizedType)
this
.getClass().getGenericSuperclass()).getActualTypeArguments()[0];
Regards, nillehammer
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Re: Re: [T5.1] @SessionState an generic pages
Em Tue, 23 Jun 2009 17:32:25 -0300, nille hammer tapestry.nilleham...@winfonet.eu escreveu: Hi Thiago, Hi Nille! Hi Hammer! :) Friends call me nille. Just joking. :P Hey! That's my open source code being used by someone besides me! Nice. :D Just trying to learn from the masters ;-) I'm not a master, just someone who love to help people in the list. :) .Maybe the solution to what you want to do is to use ApplicationStateManager directly. That's the trick! Thinking about your hint I rewrote GenericEntityPageT a bit. Nice! I'm just a little puzzle why you don't use @Persist instead of using session state objects . .. -- Thiago H. de Paula Figueiredo Independent Java consultant, developer, and instructor http://www.arsmachina.com.br/thiago - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: [T5.1] @SessionState an generic pages
Em Mon, 22 Jun 2009 19:08:40 -0300, nille hammer tapestry.nilleham...@winfonet.eu escreveu: Hi List, Hi Hammer! :) @SessionState private T value; @SessionState is handled by ApplicationStateManager per type, so I guess that it looked at your field and saw an Object. I have looked for inspiration on ars-machina (http://www.arsmachina.com.br/project/tapestrycrud/usage). Hey! That's my open source code being used by someone besides me! Nice. :D But there the generic values aren't used as SessionState but get/set in the code. Is it somehow possible to use generic fields as SessionState values? Tapestry CRUD (one of the packages in the Ars Machina Project) has a class, BaseEditPage, that should be the one you were looking. But it uses @Persist, not @SessionState, and they're handled a little bit differently by Tapestry. Maybe the solution to what you want to do is to use ApplicationStateManager directly, but I guess you should use @Persist instead of @SessionState. -- Thiago H. de Paula Figueiredo Independent Java consultant, developer, and instructor http://www.arsmachina.com.br/thiago - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
