org.hibernate.PropertyAccessException: could not set a field value by reflection setter of com.motohive.domain.model.post.VehiclePost.account
HI, I am working on Jboss 7.1.1 and Hibernate 4.x
I have the model mentioned below, i am trying to create, update and query entities, but getting the exception mentioned below
@Entity
@Table(name = "T_ACCOUNT")
public class Account {
@Column(name = "ACT_TITLE", nullable = false, length = 100)
private String title;
@OneToMany(fetch = FetchType.LAZY, cascade = { CascadeType.MERGE,
CascadeType.REMOVE, CascadeType.PERSIST }, mappedBy = "account")
private List<ItemPost> itemPosts;
public Account() {
}
// getter setter for title here.
public List<ItemPost> getItemPosts() {
return itemPosts;
}
public void setItemPosts(List<ItemPost> itemPosts) {
this.itemPosts = itemPosts;
}
}
@MappedSuperclass
public abstract class Post {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="ID")
protected Long id;
@Column(name="TITLE", nullable=true, length=100)
protected String title;
public abstract Account getAccount();
public abstract void setAccount(Account account);
}
@Entity
@Table(name="T_ITEM_POST")
@Inheritance(strategy=InheritanceType.JOINED)
@DiscriminatorColumn(name = "IP_CLASSIFICATION", discriminatorType = DiscriminatorType.STRING, length = 20, columnDefinition = "IP_CLASSIFICATION")
public class ItemPost extends Post {
@Column(name = "IP_MAKE", nullable = false, length=30)
protected String make;
@ManyToOne(targetEntity=ItemPost.class, fetch=FetchType.EAGER)
@JoinColumn(name="IP_ACT_ID", updatable=false, nullable=false)
private Account account;
public String getMake() {
return make;
}
public void setMake(String make) {
this.make = make;
}
@Override
public Account getAccount() {
return account;
}
@Override
public void setAccount(Account account) {
this.account = account;
}
}
@Entity
@Table(name="T_VEHICLE_POST")
@DiscriminatorValue("VEHICLE")
@PrimaryKeyJoinColumn(name="VP_ID", referencedColumnName="IP_ID")
public class VehiclePost extends ItemPost {
@Column(name="VP_MILAGE_COVERED")
private Integer mileage;
public Integer getMileage(){
return mileage;
}
public void setMileage(Integer mileage){
this.mileage = mileage;
}
}
Caused by: org.hibernate.PropertyAccessException: could not set a field value by reflection setter of com.motohive.domain.model.post.VehiclePost.account
at org.hibernate.property.DirectPropertyAccessor$DirectSetter.set(DirectPropertyAccessor.java:150) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:707) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:371) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:4232) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:168) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1006) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.loader.Loader.doQuery(Loader.java:883) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:289) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.loader.Loader.loadEntity(Loader.java:2058) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:82) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:72) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3697) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:439) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:420) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:204) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:251) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:148) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:954) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.internal.SessionImpl.get(SessionImpl.java:870) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:460) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:256) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:86) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:781) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:766) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:770) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:867) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]
... 122 more
Caused by: java.lang.IllegalArgumentException: Can not set com.motohive.domain.model.account.Account field com.motohive.domain.model.post.ItemPost.account to com.motohive.domain.model.post.VehiclePost
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:164) [rt.jar:1.7.0_04]
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:168) [rt.jar:1.7.0_04]
at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:81) [rt.jar:1.7.0_04]
at java.lang.reflect.Field.set(Field.java:680) [rt.jar:1.7.0_04]
at org.hibernate.property.DirectPropertyAccessor$DirectSetter.set(DirectPropertyAccessor.java:138) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
... 148 more
is there anything missing or wrong in it?
Any help ?
