Re: [xsl] document('') returning null in certain environments?

[J Ferry <ferr0084@xxxxxxxxx>]

Michael, thank you for your response.

In this case the stylesheet is stored in a database so I don't have an
actual file path that I can provide the StreamSource, any idea what I
would set the SystemId to for this?

~Jeremy



On Sat, Oct 30, 2010 at 6:18 PM, Michael Kay <mike@xxxxxxxxxxxx> wrote:
> There's no such thing as "null" in the XPath data model, but I suspect you
> mean that document('') is returning an empty node-set. The most likely
> explanation for that is that the base URI of the stylesheet is unknown. The
> W3C specs and RFCs don't like to admit that you can have a document whose
> base URI is unknown, but it can happen very easily in practice - for
example
> the base URI of a DOM is always unknown, and the base URI of a Java
> StreamSource is unknown unless you explicitly set its SystemID property.
>
> Michael Kay
> Saxonica
>
> On 31/10/2010 00:06, J Ferry wrote:
>>
>> Let me start with the high level description of what I'm trying to
>> accomplish...
>>
>> But first, I've got a limitation with the system I'm working with that
>> I can only use a single stylesheet for this particular document.
>>
>> The document was originally developed as separate stylesheets, a
>> couple of which are the barcode stylesheets from RenderX.
>>
>> I naively mashed them together into a single stylesheet and this seems
>> to work fine in my development environment (I was using OxygenXML now
>> using Ant) but it does not work when loaded into the target system (a
>> Java app running on SunOne/Tomcat). I'm not very good at debugging
>> stylesheets yet (someone needs to build a tool for that...) but I
>> think I've tracked the problem to the use of document(''). It appears
>> that the use of document('') in the target system (Tomcat/SunOne)
>> returns null, which is supposed to be used to select a value from a
>> character lookup table like this...
>>
>> value =<xsl:value-of
>> select="document('')//my:char2value/entry[@char=$char and
>> @subset=$subset]/text()"/>
>>
>> The lookup table looks like this...
>>
>> <my:char2value>
>>     <entry char="&#x0020;" subset="A">0</entry>
>>     <entry char="&#x0020;" subset="B">0</entry>
>>     <entry char="00" subset="C">0</entry>
>>     <entry char="!" subset="A">1</entry>
>>     <entry char="!" subset="B">1</entry>
>>          :
>>          :
>>          :
>> </my:char2value>
>>
>> Is there something I need to do to my runtime (different parser or
>> something) or is there a way to fix it in my stylesheet? I could put
>> together a more complete example if necessary but you'd still need the
>> runtime...
>>
>> Regards,
>> Jeremy