[CXF-2627] Return Type List gets null on client if an empty list is returned

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.1.8
• Fix Version/s: 2.2.7
• Component/s: JAXB Databinding

Environment

JSE 1.5 on Win XP

• Assignee: Daniel Kulp
• Reporter: Marc Baumgartner
• Created: 20/Jan/10 07:04
• Updated: 07/Sep/10 13:30
• Resolved: 20/Jan/10 19:15

Description

If you have a function that returns an empty list the result will be null on client. Even If add a Responsewrapper to the interface it doesn't work. If have attached a little test project / program:

Interface:
@WebService(targetNamespace = "http://cxf.apache.org/demo/CustomerService/1/", name = "CustomerService")
@SOAPBinding(style = SOAPBinding.Style.DOCUMENT, use = SOAPBinding.Use.LITERAL)
public interface CustomerService

{ @WebMethod(action = "findCustomer", operationName = "findCustomer") public @WebResult(name = "customerList") List<Customer> findCustomer(); @WebMethod(action = "findCustomer2", operationName = "findCustomer2") @ResponseWrapper(className="demo.service.CustomerListResponse") public @WebResult(name = "customerList") List<Customer> findCustomer2(); }

The Implementation:

@WebService(name = "CustomerService", serviceName = "CustomerService", targetNamespace = "http://cxf.apache.org/demo/CustomerService/1/", endpointInterface = "demo.service.CustomerService")
public class CustomerServiceImpl implements CustomerService {

public List<Customer> findCustomer()

{ // very stupid method return new ArrayList<Customer>(); }

public List<Customer> findCustomer2()

{ // another very stupid method return new ArrayList<Customer>(); }

}

And this is the main programm:
public static void main(String args[]) throws Exception

{ new Server(); System.out.println("Server ready..."); // Now Call the Service JaxWsProxyFactoryBean factory = new JaxWsProxyFactoryBean(); factory.getInInterceptors().add(new LoggingInInterceptor()); factory.getOutInterceptors().add(new LoggingOutInterceptor()); factory.setServiceClass(CustomerService.class); factory.setAddress("http://localhost:9000/CustomerService"); CustomerService client = (CustomerService) factory.create(); System.out.println("call findCustomer()"); List<Customer> result = client.findCustomer(); if (result != null) System.out.println("Listsize: " + result.size()); else System.out.println("List is null: " + result); System.out.println("call findCustomer2()"); result = client.findCustomer2(); if (result != null) System.out.println("Listsize: " + result.size()); else System.out.println("List is null: " + result); System.out.println("Server exiting"); System.exit(0); }

This will print the following output:

Server ready...
call findCustomer()
20.01.2010 07:49:45 org.apache.cxf.interceptor.LoggingOutInterceptor$LoggingCallback onClose
INFO: Outbound Message
---------------------------
ID: 1
Address: http://localhost:9000/CustomerService
Encoding: UTF-8
Content-Type: text/xml
Headers:

{SOAPAction=["findCustomer"], Accept=[*/*]}

Payload: <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><ns2:findCustomer xmlns:ns2="http://cxf.apache.org/demo/CustomerService/1/"/></soap:Body></soap:Envelope>
--------------------------------------
20.01.2010 07:49:45 org.apache.cxf.interceptor.LoggingInInterceptor logging
INFO: Inbound Message
----------------------------
ID: 1
Encoding: UTF-8
Content-Type: text/xml; charset=utf-8
Headers:

{Content-Length=[194], Server=[Jetty(6.1.21)], content-type=[text/xml; charset=utf-8]}

Payload: <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><ns2:findCustomerResponse xmlns:ns2="http://cxf.apache.org/demo/CustomerService/1/"/></soap:Body></soap:Envelope>
--------------------------------------
List is null: null
call findCustomer2()
20.01.2010 07:49:45 org.apache.cxf.interceptor.LoggingOutInterceptor$LoggingCallback onClose
INFO: Outbound Message
---------------------------
ID: 2
Address: http://localhost:9000/CustomerService
Encoding: UTF-8
Content-Type: text/xml
Headers:

{SOAPAction=["findCustomer2"], Accept=[*/*]}

Payload: <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><ns2:findCustomer2 xmlns:ns2="http://cxf.apache.org/demo/CustomerService/1/"/></soap:Body></soap:Envelope>
--------------------------------------
20.01.2010 07:49:45 org.apache.cxf.interceptor.LoggingInInterceptor logging
INFO: Inbound Message
----------------------------
ID: 2
Encoding: UTF-8
Content-Type: text/xml; charset=utf-8
Headers:

{Content-Length=[300], Server=[Jetty(6.1.21)], content-type=[text/xml; charset=utf-8]}

Payload: <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><ns2:findCustomer2Response xmlns:ns2="http://cxf.apache.org/demo/CustomerService/1/"><return xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/></ns2:findCustomer2Response></soap:Body></soap:Envelope>
--------------------------------------
List is null: null
Server exiting

Issue Links

• is cloned by: CXF-2978 CLONE -Return Type List gets null on client if an empty list is returned