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https://issues.apache.org/jira/browse/CXF-8114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16945142#comment-16945142
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Dennis Kieselhorst commented on CXF-8114:
-----------------------------------------
I suppose you don't own the service you are trying to call? If you changed the
wsdl and remove the message part, it would work.
{code:java}
<wsdl:message name="createRetoureIdRequest">
</wsdl:message>
{code}
instead of
{code:java}
<wsdl:message name="createRetoureIdRequest">
<wsdl:part element="tns:CreateRetoureIdRequest" name="createRetoureIdRequest">
</wsdl:part>
</wsdl:message>
{code}
Another option is described here
[https://stackoverflow.com/questions/6134348/wsdl-type-for-getter-without-parameter].
I think It's more a JAX-WS/ JAXB issue than something specific to CXF.
> cxf-codegen-plugin generates invalid code for operations with empty parameters
> ------------------------------------------------------------------------------
>
> Key: CXF-8114
> URL: https://issues.apache.org/jira/browse/CXF-8114
> Project: CXF
> Issue Type: Bug
> Affects Versions: 3.3.3
> Reporter: Stephan Wienczny
> Priority: Major
> Attachments: OneClickForRefund.wsdl
>
>
> We are trying to implement a webservice from a given wsdl. It contains an
> operation (createRetoureId) that references an empty element
> (CreateRetoureIdRequest)
> as parameter, e.g. it is an operation without an actual parameter. In the
> generated code this parameter is mapped to "java.lang.Object":
> {{}}{{@WebMethod}}
> {{@WebResult(name = "CreateRetoureIdResponse", targetNamespace =
> "http://oneclickforrefund.dpag.de";, partName = "parameters")}}
> {{@Generated(value = "org.apache.cxf.tools.wsdlto.WSDLToJava", date =
> "2019-09-13T11:24:07.696+02:00")}}
> {{public CreateRetoureIdResponse createRetoureId(}}
> {{ @WebParam(partName = "createRetoureIdRequest", name =
> "CreateRetoureIdRequest", targetNamespace =
> "http://oneclickforrefund.dpag.de";)}}
> {{ java.lang.Object createRetoureIdRequest}}
> {{) throws CreateRetoureIdException_Exception;}}
>
> I did not find a way to pass a valid value to the method when being invoked
> from Java. Neither "null" nor "new Object()" result in a message being send.
>
> The wsdl is attached and publicly available at
> [https://internetmarke.deutschepost.de/OneClickForRefund?wsdl]
>
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