[jira] Commented: (TRINIDAD-2038) Need new exception to know whether JSF needs to report the exception

["Pavitra Subramaniam (JIRA)" <de...@myfaces.apache.org>]

    [ https://issues.apache.org/jira/browse/TRINIDAD-2038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12995502#comment-12995502 ] 

Pavitra Subramaniam commented on TRINIDAD-2038:
-----------------------------------------------

Hello Hongbing, 

You mentioned that exceptions get thrown by model layer outside of JSF. Can you give an e.g., of when this might occur? 
How exactly will the above interface get used?

Thanks
Pavitra



> Need new exception to know whether JSF needs to report the exception
> --------------------------------------------------------------------
>
>                 Key: TRINIDAD-2038
>                 URL: https://issues.apache.org/jira/browse/TRINIDAD-2038
>             Project: MyFaces Trinidad
>          Issue Type: Bug
>    Affects Versions: 2.0.0-beta-1
>            Reporter: hongbing wang
>
> There are cases that exception is thrown in update model phase, like model layer validation failure, by model outside of JSF and the exception is also handled and reported outside of JSF. To avoid the component's local value getting reset to null, JSF needs to be notified when the it happens. The proposed solution is to re-throw a special exception to JSF and also let JSF to know whether it needs to report the exception.
> Here is the interface of the exception:
> package org.apache.myfaces.trinidad.context;
> /**
>  * Interface for exceptions that tells whether the exception needs to be reported.
>  * If an exception is thrown during JSF lifycycle and aleady reported, then it should let
>  * JSF know not to report it again.
>  *
>  */
> public interface Reportable
> {
>   
>   /**
>    * Return false if JSF doesn't need to report this exception, otherwise true.
>    */
>   public boolean isReportingMessage();
>   
> }  

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