Hi Pavitra:
It can happen in update model phase. For example, Model layer throws
exception when attribute value validation fails, binding layer detects
it and re-throwd new exception with the new interface to JSF. JSF then
can handle it accordingly.
thanks,
Hongbing
On 2/16/2011 2:09 PM, Pavitra Subramaniam wrote:
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 interface get used?
Thanks
Pavitra
On 2/16/2011 1:01 PM, Hongbing wrote:
Hi:
This is for JIRA TRINIDAD-2038, please let me know your suggestion.
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 it happens. The proposed solution is to re-throw a
special exception to JSF to notify it and also let JSF 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();
}
Thanks,
Hongbing
