When the file passed to doc() is not available..

mphare · August 26th, 2009, 01:42 PM

Hi,

I am using Saxon-B 9.0.0.6J

I have a situation where there may or may not be a file I need to bring into a transformation.

I am using:

Code:

<xsl:variable name="featGrpMap" select="doc($FeatGrpMap)"/>

Where $FeatGrpMap is a relative path to the file that might be present.

If the file is there, of course, all is well.
If the file is missing, I get a java.io.FileNotFoundException (The system cannot find the file specified).

What I hoped for is that the doc() would simply set my variable, $featGrpMap, to an empty structure that I could detect later when I went to use the information and simply skip that processing.

Is there something I can do to detect early on the file is not present and skip the doc() function? Or is there some better way to handle this behaviour?

Thanks,

Martin Honnen · August 26th, 2009, 01:48 PM

I think you want to use doc-available http://www.w3.org/TR/xpath-functions...-doc-available to check whether the document is available:

Code:

<xsl:variable name="featGrpMap" select="if (doc-available($FeatGrpMap)) then doc($FeatGrpMap) else ()"/>

mphare · August 26th, 2009, 03:23 PM

Thanks, exactly what I needed.