[jira] [Closed] (TAP5-191) Tapestry's understanding of generics is limited to getter and setter methods; it does not understand generics as parameters to event handler methods such as onActivate()

["Jochen Kemnade (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAP5-191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jochen Kemnade closed TAP5-191.
-------------------------------
    Resolution: Invalid

We assume this is no longer relevant and therefore close it.
If you still have this issue in a recent Tapestry version (such as 5.3.8 or the latest 5.4 preview release), feel free to provide the necessary information and reopen.

> Tapestry's understanding of generics is limited to getter and setter methods; it does not understand generics as parameters to event handler methods such as onActivate()
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: TAP5-191
>                 URL: https://issues.apache.org/jira/browse/TAP5-191
>             Project: Tapestry 5
>          Issue Type: Improvement
>    Affects Versions: 5.0.15
>            Reporter: Angelo Chen
>            Priority: Minor
>              Labels: bulk-close-candidate
>
> Hi, 
> I'm trying out generic in 5.0.11, I have a base class ObjectEdit, then 
> public class ObjectEdit<T> { 
>     private T object; 
>     public T getObject() { return object;} 
>     public void setObject(T object) { this.object = object;} 
>     public void onActivate(T obj) { object = obj;} 
>     public T onPassivate() { return object; } 
> } 
> I was hoping that I can just extend it like this: 
> public class UserEdit extends ObjectEdit <Usr> { 
> } 
> but it does not work, error: 
> org.apache.tapestry.ioc.internal.util.TapestryException 
> Failure reading parameter 'object' of component admin/UserEdit:object: java.lang.String 
> I have to do: 
> public class UserEdit extends ObjectEdit <User> { 
>      public void onActivate(User obj) { 
>         this.setObject(obj); 
>     } 
> } 
> and remove the onActivate from ObjectEdit, why onActivate does not work in a base class when onPassivate can? Thanks, 



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