any known issues with Xalan 2.7.1 distributed with Sun's JRE 6?

[Adrian Herscu <ad...@gmail.com>]

Hi all,

I am trying to implement few XSL extension functions in Java and call 
them from my XSL template.

I discovered that the ExpressionContext interface is not available and 
so all the org.apache namespace (there is something like 
com.sum.org.apache...internal.ExpressionContext but the compiler refuses 
it).

Also discovered that no matter what the referenced FQCN is, the XSL 
process always tries to invoke methods in the java.lang.String class.

For example

<xsl:stylesheet version="1.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
   xmlns:xalan="http://xml.apache.org/xalan"
   xmlns:utils="com.acme.followed.by.this.garbage:@%#$%@#^#%#$"
   extension-element-prefixes="utils">


Then this one works by calling the java.lang.String.length method !

     <xsl:value-of select="utils:length('fff')" />

Regards,
Adrian.

Re: any known issues with Xalan 2.7.1 distributed with Sun's JRE 6?

[Nathan Nadeau <nd...@gleim.com>]

Adrian Herscu wrote:
> Hi all,
>
> I am trying to implement few XSL extension functions in Java and call 
> them from my XSL template.
>
> I discovered that the ExpressionContext interface is not available and 
> so all the org.apache namespace (there is something like 
> com.sum.org.apache...internal.ExpressionContext but the compiler 
> refuses it).
>
> Also discovered that no matter what the referenced FQCN is, the XSL 
> process always tries to invoke methods in the java.lang.String class.
>
> For example
>
> <xsl:stylesheet version="1.0"
>   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>   xmlns:xalan="http://xml.apache.org/xalan"
>   xmlns:utils="com.acme.followed.by.this.garbage:@%#$%@#^#%#$"
>   extension-element-prefixes="utils">
Maybe you need to add a <xalan:component> section to your XSLT after the 
namespace declarations:

<xalan:component prefix="utils">
  <xalan:script lang="javaclass" src="yourClassName"/>
</xalan:component>

Or if your extension is implemented in Java it is recommended to use the 
abbreviated syntax for extensions implemented in Java, which does not 
require the <xalan:component> element. Setting the xmlns attribute alone 
(which your example shows) is not enough since that value is not used to 
actually locate your class, as far as I can tell.

See http://xml.apache.org/xalan-j/extensions.html and 
http://xml.apache.org/xalan-j/extensions.html#java-namespace for more 
details.

Also of course make sure your class is in the classpath.
>
>
> Then this one works by calling the java.lang.String.length method !
>
>     <xsl:value-of select="utils:length('fff')" />
>
> Regards,
> Adrian.
>

-- 
Nathan Nadeau
ndn@gleim.com
Software Development
Gleim Publications, Inc.
http://www.gleim.com