The documentation for REXML says is has full XPath 1.0 support.
However, I can't see a way to get the XPath class to return values
other than nodes. For example, if I have an XML document that contains
"book" elements, I should be able to do something like this.
count = XPath.evaluate(doc, count('//book'))
There is no "evaluate" method and the "first" and "match" methods don't do this.
Is this supported?
--
R. Mark Volkmann
Partner, Object Computing, Inc.
The documentation for REXML says is has full XPath 1.0 support.
However, I can't see a way to get the XPath class to return values
other than nodes. For example, if I have an XML document that contains
"book" elements, I should be able to do something like this.count = XPath.evaluate(doc, count('//book'))
Minor syntax correction here,
count = XPath.evaluate(doc, 'count(//book)')
On 1/26/06, Mark Volkmann <r.mark.volkmann@gmail.com> wrote:
There is no "evaluate" method and the "first" and "match" methods don't do this.
Is this supported?
--
R. Mark Volkmann
Partner, Object Computing, Inc.
As a work-around, you could try this:
count = XPath.match(doc, '//book').length
REXML may just support XPath's selection syntax and not the pseudo-function-things like you're trying to use above.
On Jan 26, 2006, at 8:18 PM, Mark Volkmann wrote:
On 1/26/06, Mark Volkmann <r.mark.volkmann@gmail.com> wrote:
The documentation for REXML says is has full XPath 1.0 support.
However, I can't see a way to get the XPath class to return values
other than nodes. For example, if I have an XML document that contains
"book" elements, I should be able to do something like this.count = XPath.evaluate(doc, count('//book'))
Minor syntax correction here,
count = XPath.evaluate(doc, 'count(//book)')
--
~akk
I found out that it does support what I wanted which is XPath
expressions that result in a number, string or boolean. You need to
use the XPath.first method for those.
On 1/27/06, Adam Keys <adam@therealadam.com> wrote:
On Jan 26, 2006, at 8:18 PM, Mark Volkmann wrote:
> On 1/26/06, Mark Volkmann <r.mark.volkmann@gmail.com> wrote:
>> The documentation for REXML says is has full XPath 1.0 support.
>> However, I can't see a way to get the XPath class to return values
>> other than nodes. For example, if I have an XML document that
>> contains
>> "book" elements, I should be able to do something like this.
>>
>> count = XPath.evaluate(doc, count('//book'))
>
> Minor syntax correction here,
>
> count = XPath.evaluate(doc, 'count(//book)')
>As a work-around, you could try this:
count = XPath.match(doc, '//book').length
REXML may just support XPath's selection syntax and not the pseudo-
function-things like you're trying to use above.
--
R. Mark Volkmann
Partner, Object Computing, Inc.