Re: Current template and line number

Monday, July 28, 2014, 10:32:11 PM, Jaime Garza wrote:

> Hi,
>
> I have a group of methods implementing TemplateMethodModelEx. In
> them I need to raise my exception that will can display the template
> name, the line and the column numbers. I know that these methods are
> called from MethodCall. But I have no context to either the current
> template name or the location of the element.
>
> At a minimum I would like to report the template name.
>
> Is that possible at all?
>
> This is for 2.3.19

TemplateException-s make a snapshot of the FTL(!) stack trace when
they are instantiated, and store that snapshot. That's so even if you
throw the exception in your code. And from the FTL stack trace the
template and line and column can be extract. Question is, what public
API-s you had for that in 2.3.19. 2.3.21 TemplateException has public
API to get these information, so, since you are working with a patched
FreeMarker anyway, you might as well backport those changes. If you
keep the public API the same (any feedback on that is welcome!), then
when you upgrade to 2.3.21+, you don't have to re-patch it again.

(Another possibility is doing an
Environment.getCurrentEnvironment().getCurrentNamespace().getTemplate().
Or at least I don't yet see in what situation that wouldn't work. But
of course, that only gives you the template, not the line.)

> Thanks
>
> Jaime

-- 
Thanks,
 Daniel Dekany


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