RE: Xalan-J: list of referenced DOM nodes for an XPath expression?

[Scott_Boag]

> Would it be sensible to define an Interface
> similar to XSLT's TraceListener for pure XPath also?

My gut reaction would be no... those are performance intense places and I
would rather not add more feature bloat.  But if you can make a really good
case why it makes sense, I might consider.

-scott




                                                                                       
                            
                    "Mikko                                                             
                            
                    Honkala"             To:     <[EMAIL PROTECTED]>            
                            
                    <[EMAIL PROTECTED]       cc:     (bcc: Scott Boag/CAM/Lotus)           
                            
                    ut.fi>               Subject:     RE: Xalan-J: list of referenced 
DOM nodes for an XPath       
                                          expression?                                  
                            
                    08/08/2001                                                         
                            
                    08:44 AM                                                           
                            
                    Please respond                                                     
                            
                    to xalan-dev                                                       
                            
                                                                                       
                            
                                                                                       
                            




With a little hacking it seems that I can get the information about which
nodes the XPath expression evaluates on from these 2 methods in
org.apache.xpath.axes.LocPathIterator.java :

public XObject execute(XPathContext xctxt) // for single nodes
public DTMIterator asIterator(
          XPathContext xctxt, int contextNode) // for node sets

The problem is that I have to modify Xalan's XPath source in order to send
events from these 2 methods... Would it be sensible to define an Interface
similar to XSLT's TraceListener for pure XPath also?

- Mikko Honkala - http://www.x-smiles.org/


> -----Original Message-----
> From: Gary L Peskin [mailto:[EMAIL PROTECTED]]
> Sent: 7. elokuuta 2001 19:07
> To: [EMAIL PROTECTED]
> Subject: Re: Xalan-J: list of referenced DOM nodes for an XPath
> expression?
>
>
> I'm not sure what you're getting at here, Mikko, but have a look at the
> TraceListener interface.  It gets fired whenever a node is selected.
>