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https://issues.apache.org/jira/browse/ODE-969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13290103#comment-13290103
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Jayant Vaish commented on ODE-969:
----------------------------------
In
org.apache.ode.bpel.elang.xpath20.runtime.XPath20ExpressionRuntime.evaluate(OExpression
cexp, EvaluationContext ctx) throws FaultException, EvaluationException{
.....
try { someRes = evaluate(cexp, ctx, XPathConstants.NODESET); } catch (Exception
e) { someRes = evaluate(cexp, ctx, XPathConstants.STRING); }
....
}
evaluate(cexp, ctx, XPathConstants.NODESET); is responsible to call the custom
xpath function, but that function return type is not NodeList (For example it's
return type is boolean).
So, it throws exception:
org.apache.ode.bpel.explang.EvaluationException: Error while executing an XPath
expression: net.sf.saxon.trans.XPathException: Extension function required
class org.w3c.dom.NodeList; supplied value of class
net.sf.saxon.value.BooleanValue could not be converted. (As result is not able
to converted into specified type i.e. NODESET)
Then in the catch block it again call the custom xpath function.
> Custom Xpath function executes twice.
> -------------------------------------
>
> Key: ODE-969
> URL: https://issues.apache.org/jira/browse/ODE-969
> Project: ODE
> Issue Type: Bug
> Components: BPEL Runtime
> Reporter: Jayant Vaish
> Priority: Critical
>
> Custom Xpath function executes twice because when it is called for first time
> then it's return type is expected NodeSet. if it returns something else
> exception is thrown and it is executed second time with expected return type
> of String
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