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From "Helder Magalhães" <helder.magalh...@gmail.com>
Subject Re: [1.7] GVTBuilder.build gives NPE (sometimes)
Date Tue, 25 Nov 2008 13:38:36 GMT
> It looks a threading issue. But I don't use any threading in my own code. There
> is only the EDT I guess going about its business (I use a JSVGCanvas).

Yes, it does look like a threading problem. Please take a look at the
documentation on updating stuff within the Java environment [1].

> ps: Sorry if these are FAQs.

More or less. You'll find many references to the "UpdateManager"
within the "3. Troubleshooting Apache Batik" section of official FAQ
[2]. Although no item seems to perfectly fit this particular problem,
maybe one similar to the following should be added:

3.1. Why is Batik behaving weirdly and/or I sometimes get a
In 90% of the cases, this means that you are a manipulating the
document from Java without following the recommended method

"3.1" was added on purpose in order for it to appear first, as in fact
this is one of the more frequently asked. Please double check your
code. ;-)

Hope this helps,

  Helder Magalhães

[1] http://xmlgraphics.apache.org/batik/using/scripting/java.html#Threads
[2] http://xmlgraphics.apache.org/batik/faq.html

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