[Yanel-dev] [FYI] SAXTransformerFactory#newTransformerHandler returning null

[Guillaume Déflache]

Michael Wechner schrieb:
> Guillaume Déflache wrote:
>> Hi!

Hi!


>> When using XSLT via the JAXP API, you may use the 
>> SAXTransformerFactory#newTransformerHandler(Source) method 
>> (<http://java.sun.com/javase/6/docs/api/javax/xml/transform/sax/SAXTransformerFactory.html#newTransformerHandler(javax.xml.transform.Source)>). 
>>
> 
> instead of what?

Describing an alternative way was not the point here, we just used 
what's in 
http://svn.wyona.com/repos/public/yanel/trunk/src/resources/navigation/src/java/org/wyona/yanel/impl/resources/navigation/NavigationResource.java


>> Please be aware than with Xalan (2.7.1 at least) this method may only 
>> return null if your XSLT is incorrect for some reason (in our case 
>> this was a namespace used in XPath that never got declared),
> 
> can you give a more concrete example?

In 
http://svn.wyona.com/repos/public/yanel/trunk/src/resources/navigation/src/java/org/wyona/yanel/impl/resources/navigation/NavigationResource.java 
there is:
xsltHandlers[i] = tf.newTransformerHandler(new 
StreamSource(repo.getNode(xsltPath[i]).getInputStream()));
The variable is set to null when e.g. the Yanel NS namespace has not 
been associated with the 'yanel' prefix in e.g. <xsl:value-of 
select="yanel:foo"/>

>> instead of complaining loudly, which can be extremly confusing.
> 
> which method didn't complain?

SAXTransformerFactory#newTransformerHandler as written above.

Cheers,
    Guillaume