[stringtemplate-interest] How to detect if there's an error in a template

[Terence Parr]

so it sounds like the listener thing is broker per template... grrr....
Ter
On Apr 8, 2009, at 5:58 PM, Lon Varscsak wrote:

> Aha!  That did the trick.
>
> Thanks a bunch!
>
> -Lon
>
> On Wed, Apr 8, 2009 at 5:32 PM, Terence Parr <parrt at cs.usfca.edu>  
> wrote:
> Hi Lon, that is very strange. Perhaps i messed up and I ignore the  
> template's listener and go straight for the listener of the group.  
> try setting the listener of the group you're using even if it's the  
> default group.
> Thanks,
> Ter
>
> On Apr 8, 2009, at 1:47 PM, Lon Varscsak wrote:
>
> We have a system that uses StringTemplate to merge templates that  
> are created and stored in a database by different users.  It works  
> great, I love StringTemplate. :)
>
> However, I'd like to write a little interface that can "validate"  
> the template to at least ensure that it's not going to throw errors  
> when this template makes it into production.  StringTemplate prints  
> out these wonderful exceptions that I can't figure out how to trap.
>
> When I do:
>
> StringTemplate template = new StringTempate(myDatabaseTemplate);
>
> and have a myDatabaseTemplate that is malformed, a bunch of  
> exceptions are being printed to the output, but they are not being  
> thrown in a way I can catch them.
>
> I've tried creating a StringTemplateErrorListner object and it never  
> reaches my object:
>
> StringTemplate messageTemplate = new StringTemplate();
> ErrorListener errorListener = new ErrorListener(); //this implements  
> StringTemplateErrorListener
>
> messageTemplate.setErrorListener(errorListener);
> messageTemplate.setTemplate(messageToTest); //ErrorListener doesn't  
> get stuff called, but errors are printed out.
>
> I would expect my ErrorListener object to be getting "error" or  
> "warning" called, but it doesn't.
>
> Is there anyway to "validate" a template (this template is a String  
> in memory)?
>
> Thanks,
>
> Lon
>
> P.S. -- This is using Java 1.5, and StringTemplate 3.2
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