Using java provided parameters into xpath function while applying xslt transformation

Question

I'm working at a java application that performs some xslt transformation. I would like to match nodes into the xslt document, using a parameter provided by java. Which is the right way to do something like:

<xsl:template match="//m:properties/*[contains($pattern,name())]">

because when I launch my application, it claims it's not able to compile the stylesheet, since pattern is not defined but I'm setting it using the setParameter method and I was able to use another parameter defined in the same way but in a different context. Thanks in advance Fil

Sorry, between ... and ... there was the code excerpt: <xsl:template match="//m:properties/*[contains($pattern,name())]"> — filmac
– filmac, Commented Oct 30, 2012 at 16:59
What version of XSLT (1.0 or 2.0)? Variable references are not allowed in match expressions in 1.0. — Ian Roberts
– Ian Roberts, Commented Oct 30, 2012 at 17:00

Ian Roberts · Accepted Answer · 2012-10-30 17:02:08Z

1

You need an

<xsl:param name="pattern" />

in your stylesheet to declare the parameter, the setParameter call is not sufficient on its own. However there is a further problem that, according to the XSLT 1.0 spec, match expressions are not allowed to contain variable/parameter references like $pattern. Some processors do permit them anyway (including at least some versions of Xalan), but if it doesn't work then you need to change the matching logic, e.g. by defining the template to match //m:properties/* but then only calling apply-templates for those elements that match your pattern.

answered Oct 30, 2012 at 17:02

Ian Roberts

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2 Comments

filmac Over a year ago

Thaks Ian, declaring the parameter as you suggested, it worked :)

Ian Roberts Over a year ago

@filmac OK, but be careful if you're relying on the fact that the default processor violates the spec - TransformerFactory is pluggable, and if someone runs your app with a different (stricter) processor on the classpath it may fail to compile the stylesheet...

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