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From "Howard M. Lewis Ship (JIRA)" <...@tapestry.apache.org>
Subject [jira] Updated: (TAPESTRY-2289) 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()
Date Sun, 04 May 2008 16:36:56 GMT

     [ https://issues.apache.org/jira/browse/TAPESTRY-2289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Howard M. Lewis Ship updated TAPESTRY-2289:
-------------------------------------------

    Summary: 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()
 (was: Generic support does not handle onActivate)

> 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: TAPESTRY-2289
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-2289
>             Project: Tapestry
>          Issue Type: Improvement
>          Components: tapestry-core
>    Affects Versions: 5.0.12
>            Reporter: Angelo Chen
>            Priority: Minor
>
> 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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