[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3441) Null pointer exception on org.hibernate.type.AbstractType.getHashCode(AbstractType.java:112)
Syed Mahdi (JIRA)
noreply at atlassian.com
Mon Apr 18 01:20:59 EDT 2011
[ http://opensource.atlassian.com/projects/hibernate/browse/HHH-3441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=42076#action_42076 ]
Syed Mahdi commented on HHH-3441:
---------------------------------
Ok may be my problem was not that seriously complicated even though it seems exactly like the problem at hand, what i did was use persist instead of merge as i was doing a merge on a new mypojo() instance. So persist() and then flush solved it.
> Null pointer exception on org.hibernate.type.AbstractType.getHashCode(AbstractType.java:112)
> --------------------------------------------------------------------------------------------
>
> Key: HHH-3441
> URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3441
> Project: Hibernate Core
> Issue Type: Bug
> Components: core
> Affects Versions: 3.2.5
> Environment: Hibernate 3.25., Oracle 10g, Spring 2.5.5
> Reporter: DEROUET
> Priority: Blocker
>
> The issue concerns a problem already signaled in different forums, and I decided to report it in JIRA, because many people have this same problem and after days and days of work around, the solutions possibles are heavy or dangerous for a database integrity (for example remove a non-nullability constraint...).
> Here it is the problem a previous forum participant had perfectly summarized (see http://opensource.atlassian.com/projects/hibernate/browse/HHH-2326):
> A null pointer exception is thrown when:
> a) we have a composite key with one of the attributes of the key being an FK to another persistent class.
> b) The other persistent class has an ID field whose value is being generated.
> c) The instance of the other persistent class is transient (does not yet have an ID)
> We do not get the null pointer if we explicitly set the ID (generator=assigned)
> Here it is the failure trace:
> -->
> -->
> java.lang.NullPointerException
> at org.hibernate.type.AbstractType.getHashCode(AbstractType.java:112)
> at org.hibernate.type.AbstractType.getHashCode(AbstractType.java:120)
> at org.hibernate.type.EntityType.getHashCode(EntityType.java:279)
> at org.hibernate.type.ComponentType.getHashCode(ComponentType.java:189)
> at org.hibernate.engine.EntityKey.generateHashCode(EntityKey.java:104)
> at org.hibernate.engine.EntityKey.<init>(EntityKey.java:48)
> at org.hibernate.engine.StatefulPersistenceContext.getDatabaseSnapshot(StatefulPersistenceContext.java:240)
> at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:189)
> at org.hibernate.event.def.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:512)
> at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:80)
> at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
> at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:507)
> at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:499)
> at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:495)
> at org.springframework.orm.hibernate3.HibernateTemplate$16.doInHibernate(HibernateTemplate.java:747)
> at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:419)
> at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
> at org.springframework.orm.hibernate3.HibernateTemplate.saveOrUpdate(HibernateTemplate.java:744)
> at eu.cec.argus.bcm.dao.businessContinuityEvent.BusinessContinuityEventDAOImpl.createBCEvent(BusinessContinuityEventDAOImpl.java:39)
> at eu.cec.argus.bcm.dao.businessContinuityEvent.BusinessContinuityEventDAOTest.testSaveBcEventAndRelatedMessagesAndMeetings(BusinessContinuityEventDAOTest.java:127)
> 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.springframework.test.context.junit4.SpringTestMethod.invoke(SpringTestMethod.java:198)
> at org.springframework.test.context.junit4.SpringMethodRoadie.runTestMethod(SpringMethodRoadie.java:274)
> at org.springframework.test.context.junit4.SpringMethodRoadie$2.run(SpringMethodRoadie.java:207)
> at org.springframework.test.context.junit4.SpringMethodRoadie.runBeforesThenTestThenAfters(SpringMethodRoadie.java:254)
> at org.springframework.test.context.junit4.SpringMethodRoadie.runWithRepetitions(SpringMethodRoadie.java:234)
> at org.springframework.test.context.junit4.SpringMethodRoadie.runTest(SpringMethodRoadie.java:204)
> at org.springframework.test.context.junit4.SpringMethodRoadie.run(SpringMethodRoadie.java:146)
> at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.invokeTestMethod(SpringJUnit4ClassRunner.java:151)
> at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)
> at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)
> at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:26)
> at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:36)
> at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
> at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38)
> at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
> at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
> at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
> at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
> Here they are my classes:
> @Entity
> @Table(name = "BCM_BC_EVENT")
> @IdClass(BusinessContinuityEvent.BusinessContinuityEventId.class)
> @SequenceGenerator(name = "Generator.BusinessContinuityEvent", sequenceName = "SEQ_BCM_BC_EVENT")
> public class BusinessContinuityEvent implements Serializable {
> @Embeddable
> public static class BusinessContinuityEventId implements Serializable {
>
> private static final long serialVersionUID = 3513299649110908676L;
> @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "Generator.BusinessContinuityEvent")
> @Column(name = "BCE_ID", insertable = false, updatable = false, nullable = false)
> private Long id;
>
> @ManyToOne(fetch = FetchType.LAZY, cascade = {CascadeType.PERSIST, CascadeType.REFRESH, CascadeType.MERGE})
> @Cascade(org.hibernate.annotations.CascadeType.SAVE_UPDATE)
> @JoinColumn(name = "EVE_ID", referencedColumnName = "EVE_ID", nullable = false)
> private Event event;
>
> public BusinessContinuityEventId(){
>
> }
>
> public BusinessContinuityEventId(Long id, Event event) {
> this.id = id;
> this.event = event;
> }
> public Long getId() {
> return id;
> }
> public void setId(Long id) {
> this.id = id;
> }
> public Event getEvent() {
> return event;
> }
> public void setEvent(Event event) {
> this.event = event;
> }
> @Override
> public boolean equals(Object obj) {
> if (obj instanceof BusinessContinuityEventId) {
> BusinessContinuityEventId other = (BusinessContinuityEventId) obj;
>
> return this.event.getId().equals(other.event.getId())
> && this.id.equals(other.id);
> }
> return false;
> }
> @Override
> public int hashCode() {
> return this.event.getId().hashCode() ^ this.id.hashCode();
> }
> }
> private static final long serialVersionUID = 5385009048448590115L;
>
> @Id
> private Long id;
>
> @Id
> private Event event;
> @OneToMany(fetch = FetchType.LAZY, cascade = {CascadeType.PERSIST, CascadeType.REFRESH, CascadeType.MERGE})
> @Cascade(org.hibernate.annotations.CascadeType.SAVE_UPDATE)
> @JoinColumns({
> @JoinColumn(name = "BCE_ID", referencedColumnName = "BCE_ID"),
> @JoinColumn(name = "EVE_ID", referencedColumnName = "EVE_ID")})
> private List<Message> messages;
> public Long getId() {
> return id;
> }
> public void setId(Long id) {
> this.id = id;
> }
> public Event getEvent() {
> return event;
> }
> public void setEvent(Event event) {
> this.event = event;
> }
> public List<Message> getMessages() {
> return messages;
> }
> public void setMessages(List<Message> messages) {
> this.messages = messages;
> }
> }
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
More information about the hibernate-issues
mailing list