can a entity be related to a superclass of a joined-inherita
my enivironment:
jboss 4.04 GA, jboss-EJB-3.0_RC9-FD
i use the ejb3 tutorial of joininheritance as the template . i did not chanage any code of Pet.java Cat.java Dog.java.i just add some functions to PetDao and PetDAOBean
i write a entity, Decorate, referring to Pet. i can insert a entity of Decorate into the database but when i try to get out of the entities of Decorate from the database, some exception happens:
Decorate.java
package org.jboss.tutorial.joininheritance.bean;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToOne;
@Entity
public class Decorate implements java.io.Serializable{
private int id;
private String name;
private Pet pet;
public Decorate() {
super();
}
@Id @GeneratedValue(strategy=GenerationType.AUTO)
public int getId() {
return id;
}
public String getName() {
return name;
}
@OneToOne(fetch = FetchType.LAZY)
public Pet getPet() {
return pet;
}
public void setId(int id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
public void setPet(Pet pet) {
this.pet = pet;
}
}
PetDAO.java
package org.jboss.tutorial.joininheritance.bean;
import java.util.Collection;
import java.util.List;
public interface PetDAO
{
Dog createDog(String name, double weight, int bones);
Cat createCat(String name, double weight, int lives);
List findByWeight(double weight);
Decorate createDecorate(String name,Pet pet);
Collection getDecorate();
}
PetDAOBean.java
package org.jboss.tutorial.joininheritance.bean;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
@Stateless
@Remote(PetDAO.class)
public class PetDAOBean implements PetDAO {
@PersistenceContext
private EntityManager manager;
public Dog createDog(String name, double weight, int bones) {
Dog dog = new Dog();
dog.setName(name);
dog.setWeight(weight);
dog.setNumBones(bones);
manager.persist(dog);
return dog;
}
public Cat createCat(String name, double weight, int lives) {
Cat cat = new Cat();
cat.setName(name);
cat.setWeight(weight);
cat.setLives(lives);
manager.persist(cat);
return cat;
}
public List findByWeight(double weight) {
return manager.createQuery(
"select p from Pet p where p.weight < :weight").setParameter(
"weight", weight).getResultList();
}
public Decorate createDecorate(String name, Pet pet) {
Decorate dec = new Decorate();
dec.setName(name);
dec.setPet(pet);
manager.persist(dec);
return dec;
}
public Collection getDecorate() {
Collection founds = new ArrayList();
Query query = manager.createQuery("SELECT o FROM Decorate o");
List list = query.getResultList();
for (Object obj : list) {
if (obj instanceof Decorate) {
founds.add((Decorate) obj);
}
}
return founds;
}
}
Client.java
public class Client {
public static void main(String[] args) throws Exception {
InitialContext ctx = new InitialContext();
PetDAO dao = (PetDAO) ctx.lookup("PetDAOBean/remote");
Pet p1 = dao.createCat("Toonses", 15.0, 9);
Pet p2 = dao.createCat("Sox", 10.0, 5);
Pet p3 = dao.createDog("Winnie", 70.0, 5);
Pet p4 = dao.createDog("Junior", 11.0, 1);
Decorate d1 = dao.createDecorate("Test", p1);
Decorate d2 = dao.createDecorate("Test2", p1);
List l = dao.findByWeight(14.0);
for (Object o : l) {
System.out.println(((Pet) o).getName());
}
Collection founds = dao.getDecorate(); //exception throws here
for (Decorate value : founds) {
System.out.println(value.getName());
}
}
}
Cat.java
package org.jboss.tutorial.joininheritance.bean;
import javax.persistence.Entity;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
@Entity
@Inheritance(strategy = InheritanceType.JOINED)
public class Cat extends Pet
{
int lives;
public int getLives()
{
return lives;
}
public void setLives(int lives)
{
this.lives = lives;
}
}
Dog.java
package org.jboss.tutorial.joininheritance.bean;
import javax.persistence.Entity;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.Entity;
@Entity
@Inheritance(strategy = InheritanceType.JOINED)
public class Dog extends Pet
{
private int numBones;
public int getNumBones()
{
return numBones;
}
public void setNumBones(int numBones)
{
this.numBones = numBones;
}
}
run:
[java] Sox
[java] Junior
[java] Exception in thread "main" java.lang.RuntimeException: org.jboss.tm.
JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl[FormatId=25
7, GlobalId=xhh/21, BranchQual=, localId=21] status=STATUS_NO_TRANSACTION; - nes
ted throwable: (javax.persistence.PersistenceException: org.hibernate.HibernateE
xception: instance not of expected entity type: org.jboss.tutorial.joininheritan
ce.bean.Pet_$$_javassist_10 is not a: org.jboss.tutorial.joininheritance.bean.Pe
t)
[java] at org.jboss.aspects.tx.TxPolicy.handleEndTransactionException(T
xPolicy.java:198)
[java] at org.jboss.aspects.tx.TxPolicy.endTransaction(TxPolicy.java:18
0)
[java] at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:87)
[java] at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxIntercep
tor.java:197)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropag
ationInterceptor.java:76)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(
StatelessInstanceInterceptor.java:62)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.security.AuthenticationInterceptor.invoke(A
uthenticationInterceptor.java:78)
[java] at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(
Ejb3AuthenticationInterceptor.java:131)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagatio
nInterceptor.java:47)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(As
ynchronousInterceptor.java:106)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(Sta
telessContainer.java:263)
[java] at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
[java] at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invok
e(AOPRemotingInvocationHandler.java:82)
[java] at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:82
8)
[java] at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:68
1)
[java] at org.jboss.remoting.transport.socket.ServerThread.processInvoc
ation(ServerThread.java:358)
[java] at org.jboss.remoting.transport.socket.ServerThread.dorun(Server
Thread.java:412)
[java] at org.jboss.remoting.transport.socket.ServerThread.run(ServerTh
read.java:239)
[java] Caused by: org.jboss.tm.JBossRollbackException: Unable to commit, tx
=TransactionImpl:XidImpl[FormatId=257, GlobalId=xhh/21, BranchQual=, localId=21]
status=STATUS_NO_TRANSACTION; - nested throwable: (javax.persistence.Persistenc
eException: org.hibernate.HibernateException: instance not of expected entity ty
pe: org.jboss.tutorial.joininheritance.bean.Pet_$$_javassist_10 is not a: org.jb
oss.tutorial.joininheritance.bean.Pet)
[java] at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:372)
[java] at org.jboss.tm.TxManager.commit(TxManager.java:240)
[java] at org.jboss.aspects.tx.TxPolicy.endTransaction(TxPolicy.java:17
5)
[java] at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:87)
[java] at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxIntercep
tor.java:197)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropag
ationInterceptor.java:76)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(
StatelessInstanceInterceptor.java:62)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.security.AuthenticationInterceptor.invoke(A
uthenticationInterceptor.java:78)
[java] at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(
Ejb3AuthenticationInterceptor.java:131)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagatio
nInterceptor.java:47)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(As
ynchronousInterceptor.java:106)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(Sta
telessContainer.java:263)
[java] at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
[java] at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invok
e(AOPRemotingInvocationHandler.java:82)
[java] at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:82
8)
[java] at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:68
1)
[java] at org.jboss.remoting.transport.socket.ServerThread.processInvoc
ation(ServerThread.java:358)
[java] at org.jboss.remoting.transport.socket.ServerThread.dorun(Server
Thread.java:412)
[java] at org.jboss.remoting.transport.socket.ServerThread.run(ServerTh
read.java:239)
[java] at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInv
oker.java:190)
[java] at org.jboss.remoting.Client.invoke(Client.java:525)
[java] at org.jboss.remoting.Client.invoke(Client.java:488)
[java] at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(Inv
okeRemoteInterceptor.java:55)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(Cl
ientTxPropagationInterceptor.java:61)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.security.SecurityClientInterceptor.invoke(S
ecurityClientInterceptor.java:55)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInte
rceptor.java:77)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(Stateles
sRemoteProxy.java:102)
[java] at $Proxy0.getDecorate(Unknown Source)
[java] at org.jboss.tutorial.joininheritance.Client.Client.main(Client.
java:56)
[java] Caused by: javax.persistence.PersistenceException: org.hibernate.Hib
ernateException: instance not of expected entity type: org.jboss.tutorial.joinin
heritance.bean.Pet_$$_javassist_10 is not a: org.jboss.tutorial.joininheritance.
bean.Pet
[java] at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceE
xception(AbstractEntityManagerImpl.java:641)
[java] at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletio
n(AbstractEntityManagerImpl.java:524)
[java] at org.jboss.tm.TransactionImpl.doBeforeCompletion(TransactionIm
pl.java:1491)
[java] at org.jboss.tm.TransactionImpl.beforePrepare(TransactionImpl.ja
va:1110)
[java] at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:324)
[java] at org.jboss.tm.TxManager.commit(TxManager.java:240)
[java] at org.jboss.aspects.tx.TxPolicy.endTransaction(TxPolicy.java:17
5)
[java] at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:87)
[java] at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxIntercep
tor.java:197)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropag
ationInterceptor.java:76)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(
StatelessInstanceInterceptor.java:62)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.security.AuthenticationInterceptor.invoke(A
uthenticationInterceptor.java:78)
[java] at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(
Ejb3AuthenticationInterceptor.java:131)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagatio
nInterceptor.java:47)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(As
ynchronousInterceptor.java:106)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(Sta
telessContainer.java:263)
[java] at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
[java] at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invok
e(AOPRemotingInvocationHandler.java:82)
[java] at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:82
8)
[java] at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:68
1)
[java] at org.jboss.remoting.transport.socket.ServerThread.processInvoc
ation(ServerThread.java:358)
[java] at org.jboss.remoting.transport.socket.ServerThread.dorun(Server
Thread.java:412)
[java] at org.jboss.remoting.transport.socket.ServerThread.run(ServerTh
read.java:239)
[java] Caused by: org.hibernate.HibernateException: instance not of expecte
d entity type: org.jboss.tutorial.joininheritance.bean.Pet_$$_javassist_10 is no
t a: org.jboss.tutorial.joininheritance.bean.Pet
[java] at org.hibernate.persister.entity.AbstractEntityPersister.getSub
classEntityPersister(AbstractEntityPersister.java:3568)
[java] at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl
.java:1347)
[java] at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java
:180)
[java] at org.hibernate.engine.CascadingAction$9.noCascade(CascadingAct
ion.java:347)
[java] at org.hibernate.engine.Cascade.cascade(Cascade.java:139)
[java] at org.hibernate.event.def.AbstractFlushingEventListener.cascade
OnFlush(AbstractFlushingEventListener.java:130)
[java] at org.hibernate.event.def.AbstractFlushingEventListener.prepare
EntityFlushes(AbstractFlushingEventListener.java:121)
[java] at org.hibernate.event.def.AbstractFlushingEventListener.flushEv
erythingToExecutions(AbstractFlushingEventListener.java:65)
[java] at org.hibernate.event.def.DefaultFlushEventListener.onFlush(Def
aultFlushEventListener.java:26)
[java] at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
[java] at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:
338)
[java] at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletio
n(AbstractEntityManagerImpl.java:515)
[java] ... 27 more
[java] Java Result: 1