RFR 8063087: policytool reports error message with prefix of "java.lang.Exception"

[Wang Weijun]

> On Nov 11, 2014, at 15:06, Xuelei Fan <xuelei.fan at oracle.com> wrote:
> 
> On 11/11/2014 1:31 PM, Wang Weijun wrote:
>> A subclass of Exception would also return true when using instanceof, where I think the class name is still informational.
>> 
> Got it.  But Exception is still informational as it means it is not an
> other exception.

Well, an Exception is usually thrown inside policytool to mark a user interaction error, while other exception types are about other errors, for example, a keystore cannot be loaded, a principal cannot be constructed etc. Therefore I think it's reasonable to omit the prefix of Exception.

> 
> I'm not sure it is something we really want to address.  The coding
> logic does not looks reasonable or friendly.  Or, would you please add
> some comments about why you want to treat the exception differently?

OK, I'll add my explanation above. Is that OK?

Thanks
Max

> 
> Thanks,
> Xuelei
> 
>> --Max
>> 
>>> On Nov 11, 2014, at 11:14, Xuelei Fan <xuelei.fan at oracle.com> wrote:
>>> 
>>> Why not use "instanceof"?
>>> 
>>> Xuelei
>>> 
>>> On 11/11/2014 10:58 AM, Wang Weijun wrote:
>>>> Please review the fix at
>>>> 
>>>>  http://cr.openjdk.java.net/~weijun/8063087/webrev.00/
>>>> 
>>>> which is simply
>>>> 
>>>>    void displayErrorDialog(Window w, Throwable t) {
>>>>        if (t instanceof NoDisplayException) {
>>>>            return;
>>>>        }
>>>> 
>>>> +        if (t.getClass() == Exception.class) {
>>>> +            displayErrorDialog(w, t.getLocalizedMessage());
>>>> +        } else {
>>>>        displayErrorDialog(w, t.toString());
>>>> +        }
>>>>    }
>>>> 
>>>> Error messages like "java.lang.Exception:No Policy Entry selected" is now "No Policy Entry selected". For other exception types, there will be no change.
>>>> 
>>>> Thanks
>>>> Max
>>>> 
>>> 
>> 
>