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https://issues.apache.org/jira/browse/MUSE-293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12758270#action_12758270
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Chris Twiner commented on MUSE-293:
-----------------------------------
NOTE this does not adjust either ProducerPropertiesFilter or TopicFilters use
of XPathUtils.isMatch. The reason being topicfilters shouldn't really be doing
xpath filtering anyway (thats messagefilters job) and the other filter should
probably be using the generated producer properties.
If either of these is an issue in the future it should be easy to remedy them.
> 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: Chris Twiner
> Priority: Minor
> Fix For: 2.2.1
>
> Attachments: XPathFilterNamespaceTest.java
>
>
> 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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