Re: Adding an XPath Function in Xalan 2.7.0

Yes, it extends org.apache.xpath.functions.Function. I managed to get  
it function properly (a lot of tweaking in the definition files xpath/ 
compiler/) and the only hurdle now is to convert your function to an  
Xalan 2.7.0 function. I'll be back at work on thursday so I'll let  
you know what comes out.
Cheers,

Jeroen Bulters

Op 29-mei-2006, om 19:29 heeft Brian Minchau het volgende geschreven:

> Jeroen,
> although the method  
> org.apache.xpath.compiler.Functiontable.installFunction
> (String name, Class func) has an array with the name  
> m_functions_customer,
> I don't think this is a public API. It may be public in the Java  
> sense, but
> that is probably due to it being using in a different package.
>
> That said, from what I can see from another method in Functiontable  
> used
> later on to retrieve the XPath functions, that the Class passed in  
> must
> directly or indirectly extend org.apache.xpath.functions.Function:
>
> Function getFunction(int which)
>           throws javax.xml.transform.TransformerException
>   {
>           try{
>               if (which < NUM_BUILT_IN_FUNCS)
>                   return (Function) m_functions[which].newInstance();
>               else
>                   return (Function) m_functions_customer[
>                       which-NUM_BUILT_IN_FUNCS].newInstance();
>           }catch (IllegalAccessException ex){
>                   throw new TransformerException(ex.getMessage());
>           }catch (InstantiationException ex){
>                   throw new TransformerException(ex.getMessage());
>           }
>   }
>
> Is your class extending org.apache.xpath.functions.Function?
>
> - Brian
> - - - - - - - - - - - - - - - - - - - -
> Brian Minchau
> XSLT Development, IBM Toronto
> e-mail:        minchau@xxxxxxxxxx
>
>
>
>
>
>              Jeroen Bulters
>              <jbulters@science
>              .uva.nl>                                                  
>   To
>                                        xalan-j-users@xxxxxxxxxxxxxx
>              05/19/2006  
> 03:24                                           cc
>              AM
>                                                                     
> Subject
>                                        Adding an XPath Function in  
> Xalan
>                                        2.7.0
>
>
>
>
>
>
>
>
>
>
> Hi,
>
> I'm trying to add an XPath function to Xalan 2.7.0. The function  
> itself
> compiled without any problems but using
> org.apache.xpath.compiler.Functiontable.installFunction yields  
> errors I
> can't come by.
>
> Is the installFunction usable at the moment and if so, can anyone  
> please
> supply me with a small example of the call?
>
> Thanks in advance.
>
> Jeroen Bulters
> Informatics Institute, University of Amsterdam
> Kruislaan 403, 1098SJ Amsterdam
> M:+31 6 2908 6006