Hi

I am having trouble when using the Session.merge() method on transient entities which have primitive identifiers.

The DefaultMergeEventListener class throws a nullpointerexception in the line:

entry = source.getPersistenceContext().getEntry( managedEntity );

This is due to the fact that the EntityPersister.getIdentifier() has returned an identifier of value 0, (value of a transient primitive identifier), as opposed to null, (value of a transient nullable identifier).

The code only checks if the value is null, (not zero), before executing the above line, ie in the line:

if ( id != null ) {

If I change the ids to be of type java.lang.Long, then this fixes the problem. I know that Hibernate recommend the use of nullable identifiers, however it seems strange that this error is thrown on use of primitives, particularly as the generator application generated primitive ids by default.

Has anyone else came across this problem?

Hibernate version: 3e.2.4.sp1

Exception stack trace:

Caused by:
java.lang.NullPointerException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:145)
at org.hibernate.tuple.component.AbstractComponentTuplizer.getPropertyValue(AbstractComponentTuplizer.java:64)
at org.hibernate.tuple.component.AbstractComponentTuplizer.getPropertyValues(AbstractComponentTuplizer.java:70)
at org.hibernate.tuple.component.PojoComponentTuplizer.getPropertyValues(PojoComponentTuplizer.java:83)
at org.hibernate.type.ComponentType.getPropertyValues(ComponentType.java:353)
at org.hibernate.type.ComponentType.getPropertyValues(ComponentType.java:348)
at org.hibernate.type.TypeFactory.replaceAssociations(TypeFactory.java:556)
at org.hibernate.event.def.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:366)
at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:195)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:123)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:53)
at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:677)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:661)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:665)
at org.springframework.orm.hibernate3.HibernateTemplate$23.doInHibernate(HibernateTemplate.java:765)
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:372)
at org.springframework.orm.hibernate3.HibernateTemplate.merge(HibernateTemplate.java:762)
at onboarding.dao.hibernate.OnboardingCompanyDaoImpl.storeOnboardingCompany(OnboardingCompanyDaoImpl.java:23)
at onboarding.service.DataCaptureServiceImpl.saveOnboardingCompany(DataCaptureServiceImpl.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:197)
at $Proxy2.saveOnboardingCompany(Unknown Source)
at onboarding.web.SafeSellingFormAction.save(SafeSellingFormAction.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.webflow.util.DispatchMethodInvoker.invoke(DispatchMethodInvoker.java:103)
at org.springframework.webflow.action.MultiAction.doExecute(MultiAction.java:136)
at org.springframework.webflow.action.AbstractAction.execute(AbstractAction.java:203)
at org.springframework.webflow.engine.AnnotatedAction.execute(AnnotatedAction.java:154)
at org.springframework.webflow.engine.ActionExecutor.execute(ActionExecutor.java:61)
at org.springframework.webflow.engine.support.ActionTransitionCriteria.test(ActionTransitionCriteria.java:88)
at org.springframework.webflow.engine.support.TransitionCriteriaChain.test(TransitionCriteriaChain.java:73)
at org.springframework.webflow.engine.Transition.canExecute(Transition.java:198)
at org.springframework.webflow.engine.Transition.execute(Transition.java:211)
at org.springframework.webflow.engine.TransitionableState.onEvent(TransitionableState.java:112)
at org.springframework.webflow.engine.Flow.onEvent(Flow.java:572)
at org.springframework.webflow.engine.impl.RequestControlContextImpl.signalEvent(RequestControlContextImpl.java:208)
at org.springframework.webflow.engine.impl.FlowExecutionImpl.signalEvent(FlowExecutionImpl.java:214)
at org.springframework.webflow.executor.FlowExecutorImpl.resume(FlowExecutorImpl.java:245)
at org.springframework.webflow.executor.support.FlowRequestHandler.handleFlowRequest(FlowRequestHandler.java:115)
at org.springframework.webflow.executor.mvc.FlowController.handleRequestInternal(FlowController.java:172)
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:857)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:792)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:461)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:426)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Unknown Source)