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Posted to users@cxf.apache.org by Pe...@teliasonera.com on 2007/09/18 12:27:26 UTC
ClassCastException in Proxy class for client
I'm getting ClassCastExceptions from within a dynamically created proxy
when using CXF as a client against a webservice. The WSDL for the
service is attached, but some parts are shown here:
<message name='InvoiceDS_getInvoiceData'>
<part element='tns:getInvoiceData' name='parameters'/>
</message>
<message name='InvoiceDS_getInvoiceDataResponse'>
<part element='tns:getInvoiceDataResponse' name='result'/>
</message>
<portType name='InvoiceDS'>
<operation name='getInvoiceData'>
<input message='tns:InvoiceDS_getInvoiceData'/>
<output message='tns:InvoiceDS_getInvoiceDataResponse'/>
<fault message='tns:WebServiceFault' name='WebService'/>
</operation>
</portType>
All classes are genereated with WSDL2Java, the resulting interface for
the service being (removed annotations for readability):
public interface InvoiceDS {
public java.util.List<localhost.jaws.InvoiceData> getInvoiceData(
localhost.jaws.InvoiceRequest invoiceRequest
) throws WebServiceFault_Exception;
}
The InvoiceDS interface specifies that a List of InvoiceData objects
should be returned from the method. This means that the
GetInvoiceDataResponse type is not used and CXF must unwrap the result
from the response before returning it to the client.
My testcode looks something like this:
{
QName SERVICE = new QName("http://localhost/jaws",
"InvoiceServiceDS");
InvoiceServiceDS service = new InvoiceServiceDS(new
URL("InvoiceWs.wsdl"), SERVICE);
InvoiceDS client =service.getInvoiceDSPort();
InvoiceRequest invoiceRequest = new InvoiceRequest();
invoiceRequest.setCustId("test123");
List<InvoiceData> invoiceData =
client.getInvoiceData(invoiceRequest);
}
Digging into the CXF framework with the debugger we end up in the
JaxWsClientProxy.invoke() method, line 191 has the return statement:
191 return result;
result is of type GetInvoiceDataResponse (as specified in the WSDL) and
not the list that was expected. Is there some configuration needed for
this to occur?
----------------------------------------------------------------
Peter Liljenberg
TeliaSonera AB
Software Architect, TSS-IT Channel Technologies
Cell: +46 (0)703 790 793
e-mail: peter.liljenberg@teliasonera.com
-----------------------------------------------------------------
RE: ClassCastException in Proxy class for client
Posted by Pe...@teliasonera.com.
After looking into this issue more closely I discovered that the problem
arises from the fact that 2 elements in the WSDL have the same name and
this makes CXF generate the wrong client code.
Snippet of original WSDL file:
<complexType name='InvoiceData'>
<sequence>
<element name='custID' nillable='true' type='string'/>
</sequence>
</complexType>
<complexType name='InvoiceRequest'>
<sequence>
<element name='custId' nillable='true' type='string'/>
</sequence>
</complexType>
<complexType name='getInvoiceData'>
<sequence>
<element name='InvoiceRequest' nillable='true'
type='tns:InvoiceRequest'/>
</sequence>
</complexType>
<complexType name='getInvoiceDataResponse'>
<sequence>
<element maxOccurs='unbounded' minOccurs='0' name='result'
nillable='true' type='tns:InvoiceData'/>
</sequence>
</complexType>
<element name='getInvoiceData' type='tns:getInvoiceData'/>
<element name='getInvoiceDataResponse'
type='tns:getInvoiceDataResponse'/>
</schema>
</types>
<message name='InvoiceDS_getInvoiceData'>
<part element='tns:getInvoiceData' name='parameters'/>
</message>
<message name='InvoiceDS_getInvoiceDataResponse'>
<part element='tns:getInvoiceDataResponse' name='result'/>
</message>
<portType name='InvoiceDS'>
<operation name='getInvoiceData'>
<input message='tns:InvoiceDS_getInvoiceData'/>
<output message='tns:InvoiceDS_getInvoiceDataResponse'/>
</operation>
</portType>
------
In the new version I've changed the operation name to
"getInvoiceDataOperation" and thus CXF will render a working client for
me.
WSDL snippet:
<complexType name='InvoiceData'>
<sequence>
<element name='custID'
nillable='true'
type='string' />
</sequence>
</complexType>
<complexType name='InvoiceRequest'>
<sequence>
<element name='custId'
nillable='true'
type='string' />
</sequence>
</complexType>
<complexType name='getInvoiceData'>
<sequence>
<element name='InvoiceRequest'
nillable='true'
type='tns:InvoiceRequest' />
</sequence>
</complexType>
<complexType name='getInvoiceDataResponse'>
<sequence>
<element maxOccurs='unbounded'
minOccurs='0'
name='result'
nillable='true' type='tns:InvoiceData' />
</sequence>
</complexType>
<element name='getInvoiceData'
type='tns:getInvoiceData' />
<element name='getInvoiceDataResponse'
type='tns:getInvoiceDataResponse' />
</schema>
</types>
<message name='InvoiceDS_getInvoiceData'>
<part element='tns:getInvoiceData' name='parameters' />
</message>
<message name='InvoiceDS_getInvoiceDataResponse'>
<part element='tns:getInvoiceDataResponse' name='result'
/>
</message>
<portType name='InvoiceDS'>
<operation name='getInvoiceDataOperation'>
<input message='tns:InvoiceDS_getInvoiceData' />
<output
message='tns:InvoiceDS_getInvoiceDataResponse' />
</operation>
</portType>
Maybe I should post this as a bug to the CXF team?
/Peter
-----Original Message-----
From: Peter.Liljenberg@teliasonera.com
[mailto:Peter.Liljenberg@teliasonera.com]
Sent: den 18 september 2007 12:27
To: cxf-user@incubator.apache.org
Subject: ClassCastException in Proxy class for client
I'm getting ClassCastExceptions from within a dynamically created proxy
when using CXF as a client against a webservice. The WSDL for the
service is attached, but some parts are shown here:
<message name='InvoiceDS_getInvoiceData'>
<part element='tns:getInvoiceData' name='parameters'/> </message>
<message name='InvoiceDS_getInvoiceDataResponse'>
<part element='tns:getInvoiceDataResponse' name='result'/> </message>
<portType name='InvoiceDS'>
<operation name='getInvoiceData'>
<input message='tns:InvoiceDS_getInvoiceData'/>
<output message='tns:InvoiceDS_getInvoiceDataResponse'/>
<fault message='tns:WebServiceFault' name='WebService'/>
</operation>
</portType>
All classes are genereated with WSDL2Java, the resulting interface for
the service being (removed annotations for readability):
public interface InvoiceDS {
public java.util.List<localhost.jaws.InvoiceData> getInvoiceData(
localhost.jaws.InvoiceRequest invoiceRequest
) throws WebServiceFault_Exception;
}
The InvoiceDS interface specifies that a List of InvoiceData objects
should be returned from the method. This means that the
GetInvoiceDataResponse type is not used and CXF must unwrap the result
from the response before returning it to the client.
My testcode looks something like this:
{
QName SERVICE = new QName("http://localhost/jaws",
"InvoiceServiceDS");
InvoiceServiceDS service = new InvoiceServiceDS(new
URL("InvoiceWs.wsdl"), SERVICE);
InvoiceDS client =service.getInvoiceDSPort();
InvoiceRequest invoiceRequest = new InvoiceRequest();
invoiceRequest.setCustId("test123");
List<InvoiceData> invoiceData =
client.getInvoiceData(invoiceRequest);
}
Digging into the CXF framework with the debugger we end up in the
JaxWsClientProxy.invoke() method, line 191 has the return statement:
191 return result;
result is of type GetInvoiceDataResponse (as specified in the WSDL) and
not the list that was expected. Is there some configuration needed for
this to occur?
----------------------------------------------------------------
Peter Liljenberg
TeliaSonera AB
Software Architect, TSS-IT Channel Technologies
Cell: +46 (0)703 790 793
e-mail: peter.liljenberg@teliasonera.com
-----------------------------------------------------------------