dataaccess erreur--> getInt pas mis en œuvre pour la classe oracle.jdbc.le pilote.T4CDateAccessor

J'ai récemment mis en place un spring + hibernate projet. Je suis de l'utilisation d'oracle DB. J'ai une entité comme indiqué dans le code.

@Entity
@Table(name = "P_EMP_STATUS")
public class EmployeeStatus extends AbstractEntity<Integer> implements Serializable{
private static final long serialVersionUID = 5451825528280340412L;
private Integer id;
private Region region;
private Project project;
private TaskType taskName;
private String taskType
private PrinceUser princeUser;
private Integer assignee;
private Date actualStartDate;
private Date actualFinishDate;
private Integer scheduledStartDate;
private Integer scheduledFinishDate;
private Integer effortSpent;
private String empComments;
private String mgrcomments;
private String archive;
@Id
@Column(name = "ID")
@GeneratedValue(generator="P_STATUS_SEQ", strategy=GenerationType.AUTO)
@SequenceGenerator(name="P_STATUS_SEQ", sequenceName="P_STATUS_SEQ", allocationSize=1)
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name = "REGION_ID")
public Region getRegion() {
return region;
}
public void setRegion(Region region) {
this.region = region;
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name = "PROJECT_ID")
public Project getProject() {
return project;
}
public void setProject(Project project) {
this.project = project;
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name = "TASK_ID")
public TaskType getTaskName() {
return taskName;
}
public void setTaskName(TaskType taskName) {
this.taskName = taskName;
}
@Column(name = "TASK_TYPE")
public String getTaskType() {
return taskType;
}
public void setTaskType(String taskType) {
this.taskType = taskType;
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name = "ASSIGNEE")
public PrinceUser getPrinceUser() {
return princeUser;
}
public void setPrinceUser(PrinceUser princeUser) {
this.princeUser = princeUser;
}
@Column(name = "ACT_START")
public Date getActualStartDate() {
return actualStartDate;
}
public void setActualStartDate(Date actualStartDate) {
this.actualStartDate = actualStartDate;
}
@Column(name = "ACT_FINISH")
public Date getActualFinishDate() {
return actualFinishDate;
}
public void setActualFinishDate(Date actualFinishDate) {
this.actualFinishDate = actualFinishDate;
}
@Column(name = "SCH_START")
public Integer getScheduledStartDate() {
return scheduledStartDate;
}
public void setScheduledStartDate(Integer scheduledStartDate) {
this.scheduledStartDate = scheduledStartDate;
}
@Column(name = "SCH_FINISH")
public Integer getScheduledFinishDate() {
return scheduledFinishDate;
}
public void setScheduledFinishDate(Integer scheduledFinishDate) {
this.scheduledFinishDate = scheduledFinishDate;
}
@Column(name = "EFFORT_SPENT")
public Integer getEffortSpent() {
return effortSpent;
}
public void setEffortSpent(Integer effortSpent) {
this.effortSpent = effortSpent;
}
@Column(name = "EMP_COMMENTS")
public String getEmpComments() {
return empComments;
}
public void setEmpComments(String empComments) {
this.empComments = empComments;
}
@Column(name = "MGR_COMMENTS")
public String getMgrcomments() {
return mgrcomments;
}
public void setMgrcomments(String mgrcomments) {
this.mgrcomments = mgrcomments;
}
@Column(name = "ARCHIVE")
public String getArchive() {
return archive;
}
public void setArchive(String archive) {
this.archive = archive;
}

Lorsque j'essaie de récupérer les données de la DB à l'aide de

Query query =  em.createQuery("FROM EmployeeStatus");
return query.getResultList();

J'obtiens l'erreur suivante.

java.sql.SQLException: Invalid column type: getInt not implemented for class oracle.jdbc.driver.T4CDateAccessor
oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
oracle.jdbc.driver.Accessor.unimpl(Accessor.java:358)

J'ai vérifié les mappages, tout semble correct. Quelqu'un peut-il m'aider?