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Posted to muse-dev@ws.apache.org by "Chris Twiner (JIRA)" <ji...@apache.org> on 2009/09/28 14:14:16 UTC
[jira] Resolved: (MUSE-293) XPath filter gets Namespaces from
NotificationMessage
[ https://issues.apache.org/jira/browse/MUSE-293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chris Twiner resolved MUSE-293.
-------------------------------
Resolution: Fixed
Code added, tests temporarily in the cunningly named tests folder.
Attempts have been made to keep it binary compatible.
> 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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