CODEWITHSUNDEEP
wso2complex-event-processing
boubou191911
boubou191911

Reputation: 56

WSO2 CEP 3.0.0 support of XPath 2.0 functions in the event builder

I am currently creating an Event Builder in WSO2 CEP 3.0.0. based on an XML mapping.

I would like to use soma XPath 2.0 functions like tokenize in the XPath expression.

It seems that that the Xpath parser used by CEP is jaxen that does only support XPath 1.0 (which is far more limited...).

Does anybody know if it is possible to use XPath 2.0 functions in the Event Builder?

Thanks,

Eric

Upvotes: 0

Views: 116

Answers (1)

lasantha
lasantha

Reputation: 686

CEP 3.0.0 uses AxiomXPath which is based on jaxen (Axiom 1.2.11). So it will not be possible to use XPath 2.0 functions as you have correctly inferred.

I agree that this is quite limitative. However, the main consideration here was that WSO2 ESB has first class support for XPath and if any complex XML processing needs to be done, it can be done by the ESB first and then a Thrift(WSO2Event) event can be sent to run CEP queries on that event.

However, it might be useful to add more support for XPath in event builder. You can raise a JIRA or mail thread at WSO2 dev mailing list to discuss this further.

HTH,

Lasantha

Upvotes: 1

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