${resource:CF_GenericContent}test

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Check For Empty Nodeset

Patrick Buchi

Hi all,

I'm running a query in a policy and need to check if anything was found. At the moment I check:

XPath(count($resultNodeset) > 0

Is there a better way? Does a DirXML nodeset have something like JS .length that I can check?

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  • 0

    In a query-response you can simply look for the existence of an <instance>-element with a src-dn attribute.

    As for nodesets in general, it really depends on what you mean by "empty". A Node with nothing in it (i.e. its value is the empty string) is still included by count(). If you count that as being empty you'd have to filter out those nodes first: count($nodeset[string-length(.) != 0]), otherwise count() should be sufficient.

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  • 0

    In a query-response you can simply look for the existence of an <instance>-element with a src-dn attribute.

    As for nodesets in general, it really depends on what you mean by "empty". A Node with nothing in it (i.e. its value is the empty string) is still included by count(). If you count that as being empty you'd have to filter out those nodes first: count($nodeset[string-length(.) != 0]), otherwise count() should be sufficient.

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