Unmarshalling with JAXB of a method that is defined in an inherited interface
results in an NPE exception
---------------------------------------------------------------------------------------------------------
Key: CXF-2234
URL: https://issues.apache.org/jira/browse/CXF-2234
Project: CXF
Issue Type: Bug
Components: JAXB Databinding
Affects Versions: 2.2.2
Environment: WindowsXP-SP3, Eclipse 3.4
Reporter: Tom
The UserService:
@javax.jws.WebService
public interface UserService extends AbstractService<User, Users>
{
}
The AbstractService:
@javax.jws.WebService
public interface AbstractService<T, Ts>
{
public Ts list();
}
The UserServiceImpl:
@javax.jws.WebService(endpointInterface =
"nl.knowledgeplaza.profiler.services.UserService", serviceName = "users") //
the "ws" prefix is handled by the container
public class UserServiceImpl
implements UserService
{
public Users list()
{
try
{
if (slf4j.isDebugEnabled()) slf4j.debug("list User");
// find all
List<User> lList = User.findAll();
if (slf4j.isDebugEnabled()) slf4j.debug("list User
size={}", lList.size());
// create a collection so JAXB knows what to do
Users lUsers= new Users(lList);
// done
return lUsers;
}
catch (RuntimeException e)
{
slf4j.error(ExceptionUtil.describe(e), e);
throw e;
}
}
}
UnitTests start the SOAP end point as follows:
javax.xml.ws.Endpoint.publish(cWSUserAddress, new UserServiceImpl());
The unittest:
@org.junit.Test
public void listUsersSOAP()
{
// create a proxy to the service
JaxWsProxyFactoryBean factory = new JaxWsProxyFactoryBean();
factory.getInInterceptors().add(new LoggingInInterceptor());
factory.getOutInterceptors().add(new LoggingOutInterceptor());
factory.setServiceClass(UserService.class);
factory.setAddress(cWSUserAddress);
UserService lUserService = (UserService)factory.create();
// make the call
Users lUsers = lUserService.list();
// check it
org.fest.assertions.Assertions.assertThat(
lUsers.getUser().size() ).isGreaterThan(0);
}
The call arrives serverside, the code is correctly executed and 4 User entities
have been fetched from the database. The JAXB marshalling then runs into
problems, resulting in a value of null being returned on the clients side, and
failing the unittest on a NPE.
The trace:
May 22, 2009 11:29:00 AM
org.apache.cxf.interceptor.LoggingOutInterceptor$LoggingCallback onClose
INFO: Outbound Message
---------------------------
ID: 2
Address: http://localhost:9000/ws/user
Encoding: UTF-8
Content-Type: text/xml
Headers: {SOAPAction=[""], Accept=[*/*]}
Payload: <soap:Envelope
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/";><soap:Body><ns1:list
xmlns:ns1="http://services.profiler.knowledgeplaza.nl/";
/></soap:Body></soap:Envelope>
--------------------------------------
[33299...@qtp-22864463-1] 2009-05-22 11:29:06,296 DEBUG
nl.knowledgeplaza.profiler.services.UserServiceImpl.list(UserServiceImpl.java:48)
list User
[EL Fine]: 2009-05-22
11:29:07.093--ServerSession(15545028)--Connection(13749345)--Thread(thread[33299...@qtp-22864463-1,5,main])--SELECT
id, username, middlename, email, lastname, callname, firstname, version FROM
KP_USER
[33299...@qtp-22864463-1] 2009-05-22 11:29:08,750 DEBUG
nl.knowledgeplaza.profiler.services.UserServiceImpl.list(UserServiceImpl.java:52)
list User size=4
May 22, 2009 11:29:11 AM org.apache.cxf.phase.PhaseInterceptorChain doIntercept
INFO: Interceptor has thrown exception, unwinding now
org.apache.cxf.interceptor.Fault: Marshalling Error: class
nl.knowledgeplaza.profiler.services.support.Users nor any of its super class is
known to this context.
at
org.apache.cxf.jaxb.JAXBEncoderDecoder.marshall(JAXBEncoderDecoder.java:159)
at org.apache.cxf.jaxb.io.DataWriterImpl.write(DataWriterImpl.java:169)
at
org.apache.cxf.interceptor.AbstractOutDatabindingInterceptor.writeParts(AbstractOutDatabindingInterceptor.java:105)
at
org.apache.cxf.interceptor.BareOutInterceptor.handleMessage(BareOutInterceptor.java:68)
at
org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:236)
at
org.apache.cxf.interceptor.OutgoingChainInterceptor.handleMessage(OutgoingChainInterceptor.java:74)
at
org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:236)
at
org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:89)
at
org.apache.cxf.transport.http_jetty.JettyHTTPDestination.serviceRequest(JettyHTTPDestination.java:302)
at
org.apache.cxf.transport.http_jetty.JettyHTTPDestination.doService(JettyHTTPDestination.java:265)
at
org.apache.cxf.transport.http_jetty.JettyHTTPHandler.handle(JettyHTTPHandler.java:70)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:535)
at
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:880)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:747)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
Caused by: javax.xml.bind.MarshalException
- with linked exception:
[javax.xml.bind.JAXBException: class
nl.knowledgeplaza.profiler.services.support.Users nor any of its super class is
known to this context.]
at
com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:328)
at
com.sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:254)
at
javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:75)
at
org.apache.cxf.jaxb.JAXBEncoderDecoder.writeObject(JAXBEncoderDecoder.java:441)
at
org.apache.cxf.jaxb.JAXBEncoderDecoder.marshall(JAXBEncoderDecoder.java:138)
... 21 more
Caused by: javax.xml.bind.JAXBException: class
nl.knowledgeplaza.profiler.services.support.Users nor any of its super class is
known to this context.
at
com.sun.xml.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:242)
at
com.sun.xml.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:257)
at
com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:649)
at
com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl$1.serializeBody(ElementBeanInfoImpl.java:151)
at
com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl$1.serializeBody(ElementBeanInfoImpl.java:185)
at
com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeBody(ElementBeanInfoImpl.java:305)
at
com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeRoot(ElementBeanInfoImpl.java:312)
at
com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeRoot(ElementBeanInfoImpl.java:71)
at
com.sun.xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:490)
at
com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:325)
... 25 more
Caused by: javax.xml.bind.JAXBException: class
nl.knowledgeplaza.profiler.services.support.Users nor any of its super class is
known to this context.
at
com.sun.xml.bind.v2.runtime.JAXBContextImpl.getBeanInfo(JAXBContextImpl.java:566)
at
com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:644)
... 32 more
May 22, 2009 11:29:12 AM org.apache.cxf.interceptor.LoggingInInterceptor logging
INFO: Inbound Message
----------------------------
ID: 2
Encoding: UTF-8
Content-Type: text/xml; charset=utf-8
Headers: {content-type=[text/xml; charset=utf-8], Content-Length=[415],
Server=[Jetty(6.1.15)]}
Payload: <soap:Envelope
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/";><soap:Body><ns1:listResponse
xmlns:ns1="http://services.profiler.knowledgeplaza.nl/";><soap:Fault><faultcode>soap:Server</faultcode><faultstring>Marshalling
Error: class nl.knowledgeplaza.profiler.services.support.Users nor any of its
super class is known to this
context.</faultstring></soap:Fault></ns1:listResponse></soap:Body></soap:Envelope>
--------------------------------------
The Users class is just a collection workaround as suggested in CXF's
documentation:
@XmlRootElement(name = "users")
public class Users
implements Serializable
{
public Users() { setUser(new ArrayList<User>()); } // upon JAXB
unmarshalling of an empty collection, the setUser is NOT called and the
collection would be null instead of empty
public Users(Collection<User> c) { setUser(c); }
private Collection<User> iCollection;
public Collection<User> getUser() { return iCollection; }
public void setUser(Collection<User> c) { iCollection = c; }
public List<User> asList() { return new ArrayList<User>(iCollection); }
}
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