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https://issues.apache.org/jira/browse/MUSE-293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628275#action_12628275
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Chris Twiner commented on MUSE-293:
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I'm working on this issue.
> XPath filter gets Namespaces from NotificationMessage
> -----------------------------------------------------
>
> Key: MUSE-293
> URL: https://issues.apache.org/jira/browse/MUSE-293
> Project: Muse
> Issue Type: Bug
> Components: Utilities - General, QName, and XML
> Affects Versions: 2.2.0
> Reporter: Matthes Rieke
> Assignee: Dan Jemiolo
> Priority: Minor
>
> I have stumbled across a problem when trying to filter a NotificationMessage
> with an XPath expression containing namespace declarations (e.G.
> //om:Observation/om:procedure - where om is "http://www.opengis.net/om/1.0";).
> Perhaps I made some mistake while subscribing with this filter, but to me it
> seems, that the MessagePatternFilter just invokes XPathUtils.isMatch().
> isMatch itself invokes XPathAPI.eval(context, xpath) [from apache xalan api]
> and that method has no parameter for the namespaceNode. This has the result
> that the XPath expression takes its namespaces from the NotificationMessage,
> which of course may differ from the ones specified in my subscribe request.
> Also I noticed that namespaces in a MessagePatternFilter xml file (see below)
> just get erased when parsing the xml with the FilterFactory.
> Filter to parse:
> <wsnt:Filter xmlns:wsnt="http://docs.oasis-open.org/wsn/b-2";>
> <wsnt:MessageContent
> Dialect="http://www.w3.org/TR/1999/REC-xpath-19991116";
> xmlns:om="http://www.opengis.net/om/1.0";>
>
> //om:Observation/om:procedure/@xlink:href='urn:ogc:object:procedure:CITE:WeatherService:LGA'
> </wsnt:MessageContent>
> </wsnt:Filter>
> this gets parsed in the subscribe operation of NotificationProducer (I assume
> this is done before in the FilterFactory):
> <wsnt:Filter xmlns:wsnt="http://docs.oasis-open.org/wsn/b-2";>
> <wsnt:MessageContent
> Dialect="http://www.w3.org/TR/1999/REC-xpath-19991116";>//om:Observation/om:procedure/@xlink:href='urn:ogc:object:procedure:CITE:WeatherService:LGA'</wsnt:MessageContent>
> </wsnt:Filter>
> As you can see the namespace "om:...." is removed.
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