[Hibernate Annotations ] Mapping d'heritage : WrongClassException
Hello,
je suis en train d'essager de mapper des relations One-To-Many bidirectionnelle, je m'explique :
J'ai une classe "CV" :
Code:
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@Entity
public Class CV
{
private Long id;
private List<IFunctionalSkill> functionalSkills = new ArrayList<IFunctionalSkill>();
private List<ITechnicalSkill> technicalSkills = new ArrayList<ITechnicalSkill>();
@Id @GeneratedValue(strategy=GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
/**
* @return Returns the functionalSkills.
*/
@OneToMany(mappedBy="cv", targetEntity=FunctionalSkill.class, fetch = FetchType.EAGER)
@Cascade({ org.hibernate.annotations.CascadeType.ALL, org.hibernate.annotations.CascadeType.DELETE_ORPHAN })
public List<IFunctionalSkill> getFunctionalSkills()
{
return functionalSkills;
}
/**
* @return Returns the technicalSkills.
*/
@OneToMany(mappedBy="cv", targetEntity=TechnicalSkill.class, fetch = FetchType.EAGER)
@Cascade({ org.hibernate.annotations.CascadeType.ALL, org.hibernate.annotations.CascadeType.DELETE_ORPHAN })
public List<ITechnicalSkill> getTechnicalSkills()
{
return technicalSkills;
}
} |
CV a 2 relations One-To-Many bidirectionelle avec technicalSkill et FunctionalSkill.
TechnicalSkill et FunctionalSkill héritent de la classe abstraite "Skill"
J'utilise la stategie de mappin d'heritage : SINGLE_TABLE per hierarchy (une seule table par hériarchie) :
La classe abstraite Skill est mappée de la manière suivante :
Code:
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@Entity
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="TypeSkill", discriminatorType=DiscriminatorType.STRING)
public abstract class Skill extends implements ISkill
{
private Long id;
private ICV cv;
private Map<String, ISkillDetail> details = new LinkedHashMap<String, ISkillDetail>();
public Skill() {}
@Id @GeneratedValue(strategy=GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@ManyToOne(targetEntity=CV.class)
public ICV getCv() {
return cv;
}
public void setCv(ICV cv) {
this.cv = cv;
}
// other methods ..etc
/**
* @return Returns the details.
*/
@OneToMany(mappedBy="skill", targetEntity=SkillDetail.class, cascade = CascadeType.ALL)
@MapKey(name="language")
public Map<String, ISkillDetail> getDetails()
{
return details;
}
/**
* @param details The details to set.
*/
public void setDetails(Map<String, ISkillDetail> details)
{
this.details = details;
}
...
} |
Le mapping de la classe "FunctionalSkill" :
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@Entity
@DiscriminatorValue("FunctionalSkill")
public class FunctionalSkill extends Skill implements IFunctionalSkill
{
private IFunctionalSkillType type = null;
public FunctionalSkill() {}
..etc
} |
Le mapping de la classe "technicalSkill" :
Code:
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@Entity
@DiscriminatorValue("TechnicalSkill")
public class TechnicalSkill extends Skill implements ITechnicalSkill
{
private ITechnicalSkillType type = null;
public TechnicalSkill() {}
..etc
} |
Dans mon application web, quand je crée un CV(l'id attribué automatiquement est 1 donc) et que j'ajoute un functionalSkill ou un technicalSkill, l'opération de sauvegarde du CV (saveOrUpdate) fonctionne :
dans ma BD, j'ai une table CV et une table SKILL qui possède une clé étrangère "cv_id". La colonne discriminator d ema table SKILL a soit la valeur "functionalSkill" ou "technicalSkill" selon le cas d'ajout. De plus, La colonne cv_id n'est aps nulle et possède bien la valeur 1 du CV crée.
Mais à chaque fois que je veut récupérer le CV avec l'id 1 , les méthodes getFunctionalSkill() ou getTechnicalSkill() sont appelées (mode fetch = EAGER pour les besoins de l'appli) et j'obtiens l'exceptions :
Citation:
org.springframework.orm.hibernate3.HibernateObjectRetrievalFailureException: Object with id: 1 was not of the specified subclass: fr.model.hibernate.FunctionalSkill (loaded object was of wrong class); nested exception is org.hibernate.WrongClassException: Object with id: 1 was not of the specified subclass: fr.model.hibernate.FunctionalSkill (loaded object was of wrong class)
org.hibernate.WrongClassException: Object with id: 1 was not of the specified subclass: fr.model.hibernate.FunctionalSkill (loaded object was of wrong class)
at org.hibernate.loader.Loader.instanceAlreadyLoaded(Loader.java:1235)
at org.hibernate.loader.Loader.getRow(Loader.java:1186)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:569)
at org.hibernate.loader.Loader.doQuery(Loader.java:689)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.loadCollection(Loader.java:1919)
at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:36)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:520)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1679)
at org.hibernate.collection.AbstractPersistentCollection.forceInitialization(AbstractPersistentCollection.java:454)
at org.hibernate.engine.StatefulPersistenceContext.initializeNonLazyCollections(StatefulPersistenceContext.java:755)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:229)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1785)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:48)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:42)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:2821)
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:365)
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:346)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:123)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:177)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:87)
Une erreur de mapping d'héritage quelque part??!
Je sais vraiment pas d'où peut venir l'erreur et ça fait uen semaine que je suis dessus !! :( :(
Merci d'avance pour votre aide.
