Re: [xml-dev] SAXException, checked, buy why?

[Karl Waclawek <karl@waclawek.net>]

Uche Ogbuji wrote:
> On Mon, 2005-01-03 at 09:11 -0500, Karl Waclawek wrote:
> 
>>A SAX event handler can handle exceptions thrown by the calls it makes.
>>Or it can let them escape. Depends on whether it wants to "notify"
>>the event generator or not. How is that not possible in Java?
> 
> 
> It sounds to me that the problem is that he does not want to have to
> rewrite the ContentHandler to configure this behavior for each different
> parse.  I don't think this is possible in Java, because exceptions are
> based on compile-time declarations.
> 
> Perhaps you could look at my sample Python code for an example of what I
> think he wants (which I think is only possible in such a straightforward
> manner with a dynamic language).  In my example, changing the exception
> handling behavior is a matter of different handler instantiation
> parameters, rather than different handler code.

OK, I see what you mean.
One thing that can be done easily in Java is to change the handler
instance dynamically.

> Then again, thinking about it, maybe this could be done in Java by
> registering flags on the handler that are checked within the catch code
> block in order to change behavior.  Not as straightforward, but it may
> work.

Yes, but instead of flags one can use reflection.

Karl