XOM API for Processing XML with Java

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Elliotte Rusty Harold wrote:
>> public class XOMXPath extends BaseXPath
>> public class DocumentNavigator extends DefaultNavigator {
> 
> Will these work if the classes are non-public? I'd like to hide the 
> implementation and keep the JavaDocs as small as possible. I'm thinking 
> just a single query method in the Node interface which might be backed 
> by Jaxen but not directly expose it.

Sure, it would work. Two remarks though:

1. Your query method is likely to take a String as argument, which means the 
XPath expression will be compiled every time the method is called. This is a 
serious performance problem as Jaxen often takes more time compiling an 
expression than resolving it.

2. One method (e.g. selectNodes) may not prove sufficient because you can not 
guarantee people won't use XPath functions in their expressions. I think you 
should provide some way to apply expressions such as 
"local-name(/msg:*/msg:entry/*[1])"

Considering 1 + 2, I think you could add one or two convenience methods to 
Node but for applications that intensively rely on XPath you should provide a 
public XPath object. That way, you won't clutter the Node inteface while 
allowing access to XPath powwer features (compiled XPath, XPath variables, 
functions, ...).
This is the way we did in JDOM and it proved quite useful in real 
applications.

Laurent