Re: [Simple-support] implementing a progress bar

[Niall G. <gal...@ya...>]

Yes, you need to know what your parsing, you could write a Visitor to check things like this.

"element1" = 10%
"element2" = 12%
"element4" = 50%

etc... With this you need to know the elements in advance. If you don't know them, then using an input steam with an upfront file size would be best.

--- On Wed, 21/9/11, Aaron Digulla <di...@he...> wrote:

> From: Aaron Digulla <di...@he...>
> Subject: Re: [Simple-support] implementing a progress bar
> To: sim...@li...
> Received: Wednesday, 21 September, 2011, 11:28 AM
> Am 21.09.2011 15:05, schrieb Krein,
> Jörg:
> > Hi,
> > 
> > I need to add a progress bar to visualize the
> (de)serialization process.
> > Please give me some hints how to achive this.
> > From what I understand one way is to use a visitor?
> > A simple example would be very helpful.
> 
> That depends on what you know.
> 
> Do you know in advance how many XML elements the document
> contains?
> 
> If not, do you know the file size?
> 
> If you know the latter, you can create an InputStream
> (derived from
> FilterInputStream) which updates a counter with the number
> of bytes read
> so far.
> 
> That allows you to read this information from a second
> thread or by
> triggering a callback after a certain number of bytes have
> been read.
> 
> In the former case, you need to hook into the
> (de)serialization process.
> I'm not sure whether a visitor is really helpful here.
> 
> Regards,
> 
> -- 
> Aaron "Optimizer" Digulla a.k.a. Philmann Dark
> "It's not the universe that's limited, it's our
> imagination.
> Follow me and I'll show you something beyond the limits."
> http://blog.pdark.de/
> 
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