On Tue, 6 Nov 2001, George Pieri wrote:
> I am looking for a small example of what I need to do use
> Jaxen and XPath with JDOM. I am already familar with JDom and
> would just like to know what Jaxen classes I should instantiate
> for it to evaluate an XPATH expression that will go against my
> JDOM tree
Unpack the distribution, and look in this directory:
jaxen-1.0-beta-7/src/java/samples/
Should exist a file called JDOMDemo.java, showing you exactly
what you want. (I really need to put this in a FAQ. Lots of
folks have asked. Doesn't anyone browse source anymore?)
> XPathElement xpath = new XPathElement("/customer/invoice=1111");
> org.jdom.Element = xpath.getTextMatch(root,expr);
First, no class named XPathElement. Where are you digging that
up? It might be helpful to read the JavaDocs for the API, located
in this directory:
jaxen-1.0-beta-7/doc/javadoc/
Plus... The expr of "/customer/invoice=1111" will offer up a
boolean result, not an Element. You probably want something
more along the lines of:
/customer/invoice[.=1111]
That selects <invoice> children of a <customer> root element,
where the value of the text within the <invoice> element is
equal to 1111. You'll get back a List if you use selectNodes()
or the first matching element if you use selectSingleNode().
Jaxen's XPath object takes an xpath-expression, not just a
predicate. As such, you can even just do arithmetic with
jaxen, if you like, using valid xpath exprs like "$foo + 8".
-bob
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