Hi Charmi,
instead of selecting the //symbol in the argument, I wrote a xpath
condition to select if symbol node has text else it will return empty
string.
<args>
<arg evaluator="xml" expression="concat(substring(//symbol, 1 div
boolean(//symbol/text())), substring('', 1 div not(//symbol/text()) ))"/>
</args>
hope this will help
refer http://stackoverflow.com/a/7048664 for explanation
Regards
Senduran
On Mon, Jun 6, 2016 at 3:48 PM, Charmi Jayanga <[email protected]>
wrote:
> Hi,
>
> How to filter an empty response element in WSO2 ESB payload factory.
>
> *Proxy Service*
>
> <?xml version="1.0" encoding="UTF-8"?>
> <proxy xmlns="http://ws.apache.org/ns/synapse";
> name="count_iterate"
> transports="http,https"
> statistics="disable"
> trace="disable"
> startOnLoad="true">
> <target>
> <inSequence>
> <property name="it_count" value="0" scope="operation"/>
> <iterate expression="//symbols/symbol" sequential="true">
> <target>
> <sequence>
> <property name="synapse_it_count"
> expression="get-property('operation',
> 'it_count')"/>
> <script language="js">var cnt_str =
> mc.getProperty('synapse_it_count');
> var cnt = parseInt(cnt_str);
> cnt++;
> mc.setProperty('synapse_it_count', cnt.toString());</script>
> <property name="it_count"
> expression="get-property('synapse_it_count')"
> scope="operation"/>
> <aggregate>
> <completeCondition>
> <messageCount min="-1" max="-1"/>
> </completeCondition>
> <onComplete expression="//symbol">
> <log level="custom">
> <property name="number of symbols"
>
> expression="get-property('operation','it_count')"/>
> </log>
> <payloadFactory media-type="xml">
> <format>
> <m xmlns="">
> <n>$1</n>
> </m>
> </format>
> <args>
> <arg evaluator="xml" expression="//symbol"/>
> </args>
> </payloadFactory>
> <respond/>
> </onComplete>
> </aggregate>
> </sequence>
> </target>
> </iterate>
> </inSequence>
> </target>
> <description/>
> </proxy>
>
>
> *Scenario 1*
>
> *Sample Request*
>
> <symbols>
> <symbol>WSO2</symbol>
> </symbols>
>
>
> *Sample Response*
>
> <m>
> <n>WSO2</n>
> </m>
>
>
> *Scenario 2*
>
> *Sample Request*
>
> <symbols>
> <symbol></symbol>
> </symbols>
>
>
> *Sample Response given from ESB*
>
> <m>
> <n>
> <symbol/>
> </n>
> </m>
>
>
>
> Is there any way to avoid scenario 2? Or is there any workaround? I just need
> the following response .
>
> *Sample Response expected*
>
> <m>
> <n></n>
> </m>
>
>
> Regards
> Charmi
>
>
>
> _______________________________________________
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> http://wso2.org/cgi-bin/mailman/listinfo/dev
>
>
--
*Senduran *
Software Engineer,
WSO2, Inc.; http://wso2.com/ <http://wso2.com/>
Mobile: +94 77 952 6548
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