[jdom-interest] What is a jdom context?

Michael Kay mike at saxonica.com
Tue Nov 7 09:14:36 PST 2006

I would assume it has to be a Document, Element, Attribute, Comment, etc:
one of the things that would be a Node if JDOM hadn't made the strange
decision not to have a Node class. A consequence of that decision is that
you find interfaces like this using "Object".

Michael Kay

> -----Original Message-----
> From: jdom-interest-bounces at jdom.org 
> [mailto:jdom-interest-bounces at jdom.org] On Behalf Of Syloke Soong
> Sent: 07 November 2006 16:08
> To: jdom-interest at jdom.org
> Subject: [jdom-interest] What is a jdom context?
> Given a jdom doc and a jdom xpath,
> I wish to extract whatever this xpath is pointing to in the doc.
> The jdom javadoc for class XPath says,
> selectNodes(java.lang.Object context, java.lang.String path) 
> Evaluates an XPath expression and returns the list of selected items.
> Parameters:
> context - the node to use as context for evaluating the XPath 
> expression
> Well, what is a context or node? What should I use as 
> argument context:
> I am thinking of possibilities:
> 1. A jdom Document
> 2. A jdom Element
> 3. A sax InputSource
> 4. All of the above
> IMPHO (in my projected humble opinion) it would be convenient 
> (at least
> for me) if context was a definite object similar to the way sax
> InputSource so we would know determinately what is acceptable as a
> "node" or "context".
> Anyway, the question that led to this discussion is,
> How do I extract from a jdom document using a jdom xpath (without
> straying into jaxen).
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