Oops - it's just a little too early on a Friday morning! I 've spotted the error - the XPath expression was technically correct, but the test data was not correctly Generated - thus it did not exist for the transformer.
However, I hope that this approach may thus be of benefit to someone else, albeit Xalan specific. Regards, Adrian ----- Original Message ----- From: Adrian Geissel <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, October 19, 2001 9:34 AM Subject: [C2.0rc1] SLIGHTLY OFF TOPIC: Has anyone used Xalan extensions in Cocoon? > Hi, > > I appologise in advance for posting to this mailing list, but I also think > that the answer maybe of interest to the Cocoon community. > > What I am trying to do is to build a generic form within C2 that is defined > in an XSP which is aggregated with another path that will contain the data > which is to be plugged into the form, thereby allowing for improved form > (UI) reuse across scenarios. In trying to do this, I need the ability to > perform run-time XPath evaluation, rather than at programming time. > > I have found a Xalan extension function (luckily before I wanted to write my > own :) that appears to do the trick. Its called "xalan:evaluate()" and takes > an XPath expression as a parameter, which in turn contains an XPath > expression, which is then evaluated and returned. > > I've read the docs, but can't get it to work. The docs say to use the > namespace xmlns:xalan="http://xml.apache.org/xalan";. I'm calling the > extension function in my xml2html transformation stylesheet as follows: > > <xsl:stylesheet version="1.0" > xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; > xmlns:xalan="http://xml.apache.org/xalan"; > xmlns:zdam="zenark.com/zdam" > exclude-result-prefixes="xalan" > > > > <xsl:template ...> > > ... > <xsl:choose> > <xsl:when test="@bind-to"> > <xsl:attribute name="value"><xsl:value-of > select="xalan:evaluate(@bind-to)"/></xsl:attribute> > </xsl:when> > <xsl:otherwise><xsl:attribute name="value"><xsl:value-of > select="normalize-space()"/></xsl:attribute></xsl:otherwise> > </xsl:choose> > ... > > </xsl:template> > > </xsl:stylesheet> > > The problem is that evaluate() returns '', rather than the expected real > value. The returned XPath expression (in @bind-to) is correct. > > Any thoughts or experiences? > Thanks in advance, > Adrian > > > > --------------------------------------------------------------------- > Please check that your question has not already been answered in the > FAQ before posting. <http://xml.apache.org/cocoon/faqs.html> > > To unsubscribe, e-mail: <[EMAIL PROTECTED]> > For additional commands, e-mail: <[EMAIL PROTECTED]> > > --------------------------------------------------------------------- Please check that your question has not already been answered in the FAQ before posting. <http://xml.apache.org/cocoon/faqs.html> To unsubscribe, e-mail: <[EMAIL PROTECTED]> For additional commands, e-mail: <[EMAIL PROTECTED]>
