Re: [Simple-support] Valid XML characters and String recoding

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

Hi,

Are you suggesting there is a bug? I think for faster processing something could be done in the org.simpleframework.xml.stream.Formatter object, however I am not sure there is a problem here though that needs to be fixed. You could also write your own java.io.Writer object. If these are not suitable then I think your Transform<String> is probably best.

Thanks,
Niall

--- On Thu, 13/9/12, Dawid Weiss <daw...@gm...> wrote:

> From: Dawid Weiss <daw...@gm...>
> Subject: [Simple-support] Valid XML characters and String recoding
> To: sim...@li...
> Received: Thursday, 13 September, 2012, 1:46 AM
> Hi Niall, everyone.
> 
> I'd like to bring up the issue that occurred to me in
> practice. We
> have input data which we serialize via simple-xml to
> external XML
> files. Everything works like a charm except when there are
> String
> objects with unmappable XML characters in the data model. We
> don't
> have any control over these strings and need to make sure
> the produced
> XML is always valid (parseable).
> 
> The spec (and wikipedia) say the following:
> 
> Unicode code points in the following ranges are valid in XML
> 1.0 documents:[10]
> - U+0009, U+000A, U+000D: these are the only C0 controls
> accepted in XML 1.0;
> - U+0020–U+D7FF, U+E000–U+FFFD: this excludes some (not
> all)
> non-characters in the BMP (all surrogates, U+FFFE and U+FFFF
> are
> forbidden);
> - U+10000–U+10FFFF: this includes all code points in
> supplementary
> planes, including non-characters.
> 
> Unfortunately at the moment characters outside of these
> ranges are
> passed to the XML stream writer and in effect produce
> invalid XML.
> 
> There are no "simple" solutions but there are workarounds. I
> used a
> Transform<String> to recode all the strings that had
> invalid
> characters before serialization. This seems like a sensible
> solution
> to use by default (although it does come with a performance
> penalty).
> 
> Looking forward to hearing your thoughts about this,
> Dawid
> 
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