ClassCastException on OneToOne merge
I have a OneToOne relationship as follows:
package company.payroll
...
@Entity
@Inheritance(strategy=InheritanceType.JOINED)
@Table(name="core_employee")
public class Employee extends Person {
...
private Employment employment;
...
@OneToOne(
optional=false,
cascade={CascadeType.ALL})
@JoinColumn(
name="employment",
unique=true,
nullable=false,
updatable=true)
public Employment getEmployment() {
return employment;
}
public void setEmployment(Employment employment) {
this.employment = employment;
}
...
}and
package company.payroll
...
@Entity
@Table(name = "payroll_employment")
@SequenceGenerator(
name = "payroll.Employment.id",
sequenceName= "payroll_employment_id")
public class Employment implements Serializable {
...
private Integer id;
private Employee employee;
...
@Id(
generate = GeneratorType.SEQUENCE,
generator = "payroll.Employment.id")
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
@OneToOne(mappedBy = "employment")
public Employee getEmployee() {
return employee;
}
public void setEmployee(Employee employee) {
this.employee = employee;
}
...
}This all works fine (great, in fact) when creating a new Employee, and deleting an existing Employee. But when updating an existing Employee like so:
employee = entityManager.merge(employee);
I get the following Exception:
10:44:12,806 ERROR [MakeEmployeePersistentAction] Error updating company.payroll.Employee javax.ejb.EJBException: null; CausedByException is: company.payroll.Employment at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:46) at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:70) at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:134) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:61) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:39) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:63) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:32) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:91) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:163) at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:60) at $Proxy406.makePersistent(Unknown Source) at company.servlet.action.dao.MakePersistentAction.execute(MakePersistentAction.java:35) at company.payroll.MakeEmployeePersistentAction.execute(MakeEmployeePersistentAction.java:32) at company.payroll.MakeEmployeePersistentAction.execute(MakeEmployeePersistentAction.java:1) at company.servlet.action.dao.DAOAction.process(DAOAction.java:35) at company.servlet.action.dao.DAOAction.process(DAOAction.java:1) at company.servlet.action.StatelessClientAction.process(StatelessClientAction.java:28) at company.servlet.action.TypicalAction.execute(TypicalAction.java:27) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) at company.servlet.action.CustomActionServlet.doPost(CustomActionServlet.java:37) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at company.links.LinksFilter.doHttp(LinksFilter.java:58) at company.servlet.filters.CustomFilter.doFilter(CustomFilter.java:33) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at company.security.UserFilter.doHttp(UserFilter.java:23) at company.servlet.filters.CustomFilter.doFilter(CustomFilter.java:33) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at company.thoughts.ThoughtFilter.doHttp(ThoughtFilter.java:50) at company.servlet.filters.CustomFilter.doFilter(CustomFilter.java:33) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) 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.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:407) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:365) 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:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) at java.lang.Thread.run(Thread.java:595) java.lang.ClassCastException: company.payroll.Employment at org.hibernate.type.IntegerType.set(IntegerType.java:41) at org.hibernate.type.NullableType.nullSafeSet(NullableType.java:63) at org.hibernate.type.NullableType.nullSafeSet(NullableType.java:45) at org.hibernate.loader.Loader.bindPositionalParameters(Loader.java:1514) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1576) at org.hibernate.loader.Loader.doQuery(Loader.java:661) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:223) at org.hibernate.loader.Loader.loadEntity(Loader.java:1782) at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:47) at org.hibernate.loader.entity.EntityLoader.loadByUniqueKey(EntityLoader.java:85) at org.hibernate.persister.entity.AbstractEntityPersister.loadByUniqueKey(AbstractEntityPersister.java:1512) at org.hibernate.type.EntityType.loadByUniqueKey(EntityType.java:365) at org.hibernate.type.EntityType.resolve(EntityType.java:306) at org.hibernate.type.EntityType.replace(EntityType.java:207) at org.hibernate.type.TypeFactory.replace(TypeFactory.java:431) at org.hibernate.event.def.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:279) at org.hibernate.event.def.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:245) at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:102) at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:616) at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:602) at org.hibernate.engine.CascadingAction$6.cascade(CascadingAction.java:156) at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:213) at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:157) at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:108) at org.hibernate.engine.Cascade.cascade(Cascade.java:248) at org.hibernate.event.def.DefaultMergeEventListener.cascadeOnMerge(DefaultMergeEventListener.java:330) at org.hibernate.event.def.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:244) at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:102) at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:53) at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:608) at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:594) at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:140) at org.jboss.ejb3.entity.InjectedEntityManager.merge(InjectedEntityManager.java:102) at company.ejb.DAOBeanCMP.makePersistent(DAOBeanCMP.java:122) at company.payroll.EmployeeDAOBean.makePersistent(EmployeeDAOBean.java:59) at company.payroll.EmployeeDAOBean.makePersistent(EmployeeDAOBean.java:1) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:109) at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:32) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:66) at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:134) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:61) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:39) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:63) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:32) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:91) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98) at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:163) at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:60) at $Proxy406.makePersistent(Unknown Source) at company.servlet.action.dao.MakePersistentAction.execute(MakePersistentAction.java:35) at company.payroll.MakeEmployeePersistentAction.execute(MakeEmployeePersistentAction.java:32) at company.payroll.MakeEmployeePersistentAction.execute(MakeEmployeePersistentAction.java:1) at company.servlet.action.dao.DAOAction.process(DAOAction.java:35) at company.servlet.action.dao.DAOAction.process(DAOAction.java:1) at company.servlet.action.StatelessClientAction.process(StatelessClientAction.java:28) at company.servlet.action.TypicalAction.execute(TypicalAction.java:27) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) at company.servlet.action.CustomActionServlet.doPost(CustomActionServlet.java:37) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at company.links.LinksFilter.doHttp(LinksFilter.java:58) at company.servlet.filters.CustomFilter.doFilter(CustomFilter.java:33) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at company.security.UserFilter.doHttp(UserFilter.java:23) at company.servlet.filters.CustomFilter.doFilter(CustomFilter.java:33) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at company.thoughts.ThoughtFilter.doHttp(ThoughtFilter.java:50) at company.servlet.filters.CustomFilter.doFilter(CustomFilter.java:33) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) 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.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:407) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:365) 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:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) at java.lang.Thread.run(Thread.java:595)
It seems that somewhere along the line, Hibernate is trying to cast the entire Employment object as its id? What am I doing wrong? (This is the first time I'm trying to employ the OneToOne relationship.)
