Cannot convert #NUMBER to a NodeList - Xalan and the XPath function count()

[David Brossard]

Hi,

I want to count the occurrences of an Element based on the value of one its attributes. I have written the XSLT displayed below and tested it in an online XSLT tester and it works so far.

When I write my own Java code, though, I keep getting an error that Cannot convert #NUMBER to a NodeList. I cannot find a good answer though.

Here is my XSLT:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xacml3="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"> <xsl:template match="/"> <svg xmlns="http://www.w3.org/2000/svg" width='300px' height='300px'> <title>XACMListics</title> <text x='60' y='250' fill='blue'> <xsl:value-of select="count(/**/xacml3:Rule[@Effect='Deny'])" /> </text> </svg> </xsl:template> </xsl:stylesheet>

And here is how I invoke the transformation

	private void countDenyOccurrences() throws Exception {
		try {
			logger.info("1. Instantiate a TransformerFactory");
			TransformerFactory tFactory = TransformerFactory.newInstance();
			logger.info("2. Process the stylesheet Source and generate a Transformer");
			Transformer transformer = tFactory.newTransformer(xacmlSvgXslt);
			for (int i = 0; i < xacmlFiles.size(); i++) {
				logger.info("Processing file "+i+" / "+xacmlFiles.size()+".");
				logger.info("3. Transform XML Source and send the output to a Result object");
				ByteArrayOutputStream bos = new ByteArrayOutputStream();
				Result output = new StreamResult(bos);
				transformer.transform(new StreamSource(xacmlFiles.get(i)), output);
				bos.flush();
				String outputValue = bos.toString();
				logger.debug(outputValue);
			}
		} catch (Exception e) {
			logger.error(e);
			e.printStackTrace();
			throw e;
		}
	}

In the above code I iterate over a list of files and apply the XSLT to get the count of it and save it inside an XML SVG File as per the XSLT transformation which goes to a string (via a ByteArrayOutputStream). However even before I reach that point, I get the exception I mentioned at the top.

So what's the issue?

Thanks,
D.

[g tsuji]

I don't think there is such thing in xslt/xpath

<xsl:value-of select="count(/**/xacml3:Rule[@Effect='Deny'])" />

write instead this,

<xsl:value-of select="count(//xacml3:Rule[@Effect='Deny'])" />