[ALBPM-5.7] - How to use the result of a invoked web service?

Question

Using PBL I wrote the following piece of code:
........some rows........
request as Ex1_WebServices.Ph.GetSuperiorRequest2
response as Ex1_WebServices.Ph.GetSuperiorResponse2
lm as MyPrj.LineManager
request.alias = "danieas"
getSuperior PeopleHierarchyNavigatorService
using getSuperiorRequest = request
returning response = superiorResponse
if response is not null then
lm.firstname = String(response.people.person.firstname)
lm.lastname = String(response.people.person.lastname)
else
logMessage "response is null" using severity = DEBUG
end
the service is correctly called and the right answer is received:
<?xml version="1.0" encoding="utf-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header />
<SOAP-ENV:Body>
<tns:people xmlns:tns="http://ws1.example.com">
<tns:person>
<tns:deptNumber>1111111111111</tns:deptNumber>
<tns:unit>16</tns:unit>
<tns:team>49</tns:team>
<tns:email>[email protected]</tns:email>
<tns:firstname>Franz</tns:firstname>
<tns:lastname>PAGNOTTA</tns:lastname>
</tns:person>
</tns:people>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
anyway
lm.firstname = String(response.people.person.firstname)
fails reporting the following stacktrace:
Null reference found in 'response.people'. The expected type was 'ROQ_WebServices.Ph.ListOfPeople'.
fuego.compiler.NullReferenceException: Null reference found in 'response.people'. The expected type was 'ROQ_WebServices.Ph.ListOfPeople'.
     at fuego.compiler.MemberReference.run(MemberReference.java:553)
     at fuego.compiler.Node.value(Node.java:2279)
Anybody can help?

Answer 1

A partial solution
The real answer is:
<?xml version="1.0" encoding="utf-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header />
<SOAP-ENV:Body>
<ns1:people xmlns:ns1="http://ws1.example.com">
<ns1:person>
<ns1:deptNumber>1111111111111</ns1:deptNumber>
<ns1:unit>16</ns1:unit>
<ns1:team>49</ns1:team>
<ns1:email>[email protected]</ns1:email>
<ns1:firstname>Franz</ns1:firstname>
<ns1:lastname>PAGNOTTA</ns1:lastname>
</ns1:person>
</ns1:people>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
instead of
<?xml version="1.0" encoding="utf-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header />
<SOAP-ENV:Body>
<tns:people xmlns:tns="http://ws1.example.com">
<tns:person>
<tns:deptNumber>1111111111111</tns:deptNumber>
<tns:unit>16</tns:unit>
<tns:team>49</tns:team>
<tns:email>[email protected]</tns:email>
<tns:firstname>Franz</tns:firstname>
<tns:lastname>PAGNOTTA</tns:lastname>
</tns:person>
</tns:people>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
that is there is ns1 instead of tns as name prefix (I see it by the debugger).
To get out a string, for example the lastname, an Xpath expression can be used:
"/ns1:people/ns1:person/ns1:lastname"
that put into BPL becomes:
selectString(response, xpath : "/ns1:people/ns1:person/ns1:lastname")
but to write this code I can only figure out that BPM substituted tns with ns1 in other words noone garantee that the prefix will be always ns1.
Is there a way to get it out by a program?