Hi. I’m having a problem when copying data from one variable to another within
a forEach loop. When I use a query to copy data out of a variable I get a
selection failure fault at runtime. This works correctly when I copy from an
expression instead of a query.
I have attached an example that demonstrates the problem. The expected output
of the attached BPEL process is the string “five”. It works correctly when
using an expression, but fails when using a query. Here is the relevant
snippet:
<bpws:forEach counterName="Counter" name="ForEach" parallel="no">
<bpws:startCounterValue
expressionLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[1]]></bpws:startCounterValue>
<bpws:finalCounterValue
expressionLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[count($Data/ns0:Record)]]></bpws:finalCounterValue>
<bpws:scope>
<bpws:assign validate="no">
<bpws:copy>
<!--
---------------------------------------------------------------------------- -->
<!-- This generates a selection failure at runtime. -->
<bpws:from variable="Data">
<bpws:query
queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[/ns0:Record[$Counter]/ns0:SomeValue]]></bpws:query>
</bpws:from>
<!-- This works. -->
<!-- <bpws:from
expressionLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[$Data/ns0:Record[$Counter]/ns0:SomeValue]]></bpws:from>
-->
<!--
---------------------------------------------------------------------------- -->
<bpws:to part="payload" variable="output"/>
</bpws:copy>
</bpws:assign>
</bpws:scope>
</bpws:forEach>
I have tested this with Ode 1.2 and a recent build of Ode 1.X and both behave
the same. Can someone tell me if I am doing something wrong? Or should I
write a bug report for this?
Thanks for your time.
-Jon
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