Calling web service via utl_dbws with unbounded return values

Question

Hello, everyone.
I'm trying to use utl_dbws to call web service from Oracle DB 10 g.
WS has unbounded return value:
<xs:element maxOccurs='unbounded' minOccurs='0' name='return' type='xs:string'/>
I'm setting return paramter in web service call handler like this:
sys.UTL_DBWS.set_return_type(l_h_service_call, cs_qname_type_string);
and when I'm trying to call it from PL/SQL function I'm getting an error:
ORA-29532: Java call terminated by uncaught Java exception:
deserialization error: XML reader error: unexpected character content: "s2"
ORA-06512: at "SYS.UTL_DBWS", line 388
ORA-06512: at "SYS.UTL_DBWS", line 385
ORA-06512: at line 38
I've tried to return values by out parameters and got the same exception.
It looks like utl_dbws needs to know parameters count before calling.
Have anyone succeded in getting arrays from Web Service call?
This is a part of wsdl:
<xs:complexType name='getProcessList'>
<xs:sequence>
<xs:element minOccurs='0' name='nameMask' type='xs:string'/>
</xs:sequence>
</xs:complexType>
<xs:complexType name='getProcessListResponse'>
<xs:sequence>
<xs:element maxOccurs='unbounded' minOccurs='0' name='return' type='xs:string'/>
</xs:sequence>
</xs:complexType>
Throught SoapUI I can produce such kind of request:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:proc="http://processmanager.argustelecom.ru/">
<soapenv:Header/>
<soapenv:Body>
<proc:getProcessList>
<processNameMask>*</processNameMask>
</proc:getProcessList>
</soapenv:Body>
</soapenv:Envelope>
and get a response:
<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
<env:Header/>
<env:Body>
<ns2:getProcessListResponse xmlns:ns2="http://processmanager.argustelecom.ru/">
<return>s1</return>
<return>s2</return>
<return>s3</return>
<return>s4</return>
</ns2:getProcessListResponse>
</env:Body>
</env:Envelope>
PL/SQL function:
DECLARE
cs_qname_type_string CONSTANT sys.UTL_DBWS.qname
:= sys.UTL_DBWS.to_qname('http://www.w3.org/2001/XMLSchema', 'string') ;
cs_qname_type_int CONSTANT sys.UTL_DBWS.qname := sys.UTL_DBWS.to_qname('http://www.w3.org/2001/XMLSchema', 'int');
cs_qname_type_any CONSTANT sys.UTL_DBWS.qname
:= sys.UTL_DBWS.to_qname('http://www.w3.org/2001/XMLSchema', 'anyType') ;
cs_endpoint CONSTANT VARCHAR2(256) := 'http://server:8080/process-manager/ProcessManager';
l_service sys.UTL_DBWS.service;
l_service_qname sys.UTL_DBWS.qname;
l_port_qname sys.UTL_DBWS.qname;
l_operation_qname sys.UTL_DBWS.qname;
l_h_service_call sys.UTL_DBWS.call;
l_params sys.UTL_DBWS.anydata_list;
l_ret_val SYS.ANYDATA;
BEGIN
l_service_qname := sys.UTL_DBWS.to_qname(NULL, 'ProcessManagerService');
l_service := sys.UTL_DBWS.create_service(l_service_qname);
l_port_qname := sys.UTL_DBWS.to_qname(NULL, 'ProcessListServiceBinding');
l_operation_qname := sys.UTL_DBWS.to_qname('http://processmanager.argustelecom.ru/', 'getProcessList');
l_h_service_call := sys.UTL_DBWS.create_call(l_service, l_port_qname, l_operation_qname);
sys.UTL_DBWS.set_target_endpoint_address(l_h_service_call, cs_endpoint);
-- return type
sys.UTL_DBWS.set_return_type(l_h_service_call, cs_qname_type_any);
-- param type
sys.UTL_DBWS.ADD_PARAMETER(l_h_service_call, 'processNameMask', cs_qname_type_string, 'ParameterMode.IN');
l_params(1) := anydata.convertvarchar2('*');
l_ret_val := sys.UTL_DBWS.invoke(l_h_service_call, l_params);
IF l_ret_val IS NULL THEN
DBMS_OUTPUT.put_line('l_ret_val is null');
ELSE
DBMS_OUTPUT.put_line('l_ret_val is not null');
END IF;
sys.UTL_DBWS.release_call(l_h_service_call);
END;
Edited by: Ilya on 03.12.2008 3:50

Answer 1

Hi Tony
I'm not sure if you would have solved your problem by now, but with my recent experience with the utl_dbws package, for doc lits with complex data types, you have to call the service with an XML request, as opposed to passing the param array.
If you still need details, reply accordingly.
Ta
cT