How to use count() function

Question

Hi,
Following is XML data
<?xml version="1.0" encoding="UTF-8" ?>
<lookup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.oracle.com/lookup lookup.xsd"
xmlns="http://xmlns.oracle.com/lookup">
<value>
<scode>1001</scode>
<destination>NEO</destination>
</value>
<value>
<scode>1002</scode>
<destination>NEO</destination>
</value>
<value>
<scode>1003</scode>
<destination>OFS</destination>
</value>
<value>
<scode>1004</scode>
<destination>NEO</destination>
</value>
<value>
<scode>1005</scode>
<destination>OFS</destination>
</value>
</lookup>
I want to count number of occurances of node "value". I have used following expression:
<assign name="Assign_1">
<copy>
<from expression="count(bpws:getVariableData('receiveInput_Read_InputVariable','lookup','/ns3:lookup/ns3:value'))"/>
<to variable="outputVariable" part="payload" query="/client:ReadXML_Async_PRCProcessResponse/client:result"/>
</copy>
</assign>
But the result of this expression is always 0. Can somebody please point out where I am doing the mistake?
Regards
Nitin

Answer 1

Ntin,
You could try using the ora:countNodes in built function which should provide the desired effect. I always tend to use this when counting nodes which is what i think you need to do here
For Example:
ora:countNodes('HumanTask1_1_globalVariable','payload','/task:task/task:userComment')
Would count the number of occurances of userComment
Thinks your would follow the following pattern:
ora:countNodes('receiveInput_Read_InputVariable','lookup','/ns3:lookup/ns3:value')
David