I wanted to find out if hibernate supports composite primary key using a field and a component type. So I have an @Embeddable component type and I would like to use it as a primary key along with another column as a composite primary key.
So my table "DEPT_HISTORY" has composite primary keys (GROUP_DEPT, DEPTID, EFFDT). I mapped GROUP_DEPT and DEPTID as an @Embeddable component type to Department class.
@Embeddable public class Department implements Serializable {
private static final long serialVersionUID = 1L;
private String departmentGroup;
private String departmentId;
public String getDepartmentGroup() {
return departmentGroup;
}
public void setDepartmentGroup(String departmentGroup) {
this.departmentGroup = departmentGroup;
}
public Department withDepartmentGroup(String departmentGroup) {
setDepartmentGroup(departmentGroup);
return this;
}
public String getDepartmentId() {
return departmentId;
}
public void setDepartmentId(String departmentId) {
this.departmentId = departmentId;
}
public Department withDepartmentId(String departmentId) {
setDepartmentId(departmentId);
return this;
}
@Override
public String toString() {
return Objects.toStringHelper(this).add("departmentGroup", getDepartmentGroup())
.add("departmentId", getDepartmentId()).toString();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof Department)) {
return false;
}
Department other = (Department) obj;
return Objects.equal(getDepartmentGroup(), other.getDepartmentGroup())
&& Objects.equal(getDepartmentId(), other.getDepartmentId());
}
@Override
public int hashCode() {
return Objects.hashCode(getDepartmentGroup(), getDepartmentId());
}
}
I am mapping a composite primary key using GROUP_DEPT, DEPTID above and EFFDT below as follows. Does hibernate support this. I have similar classes that it works on but for some reason fails on this class with "Caused by: org.hibernate.AnnotationException: com.blah.blah.component.Department must not have @Id properties when used as an @EmbeddedId: com.blah.blah.entity.DepartmentHistory.department
@Entity @Table(name = "dept_history") public class DepartmentHistory implements Serializable {
private static final long serialVersionUID = 1L;
private static final String DATETIME_FORMAT = "MM-dd-yyyy HH:mm:ss ZZ";
protected static final DateTimeFormatter DATE_FORMAT = DateTimeFormat.forPattern(DATETIME_FORMAT);
@Id
@Embedded
@AttributeOverrides({
@AttributeOverride(name = "departmentGroup", column = @Column(name = "GROUP_DEPT", nullable = false)),
@AttributeOverride(name = "departmentId", column = @Column(name = "DEPTID", nullable = false)) })
private Department department;
@Id
@Column(name = "EFFDT", nullable = false)
@Temporal(TemporalType.TIMESTAMP)
private Calendar effectiveDate;
@Column(name = "DESCR", nullable = false)
private String description;
@Column(name = "MANAGER_ID", nullable = false)
private String managerId;
public Department getDepartment() {
return department;
}
public void setDepartment(final Department department) {
this.department = department;
}
public DepartmentHistory withDepartment(final Department department) {
setDepartment(department);
return this;
}
public Calendar getEffectiveDate() {
return effectiveDate;
}
public void setEffectiveDate(final Calendar effectiveDate) {
this.effectiveDate = effectiveDate;
}
public DepartmentHistory withEffectiveDate(final Calendar effectiveDate) {
setEffectiveDate(effectiveDate);
return this;
}
public DateTime readEffectiveDateAsDateTime() {
return calendarToDateTime(effectiveDate);
}
public void writeEffectiveDateAsDateTime(final DateTime effectiveDate) {
this.effectiveDate = dateTimeToCalendar(effectiveDate);
}
public DepartmentHistory withEffectiveDateAsDateTime(final DateTime effectiveDate) {
writeEffectiveDateAsDateTime(effectiveDate);
return this;
}
public String getDescription() {
return description;
}
public void setDescription(final String description) {
this.description = description;
}
public DepartmentHistory withDescription(final String description) {
setDescription(description);
return this;
}
public String getManagerId() {
return managerId;
}
public void setManagerId(final String managerId) {
this.managerId = managerId;
}
public DepartmentHistory withManagerId(final String managerId) {
setManagerId(managerId);
return this;
}
@Override
public String toString() {
return Objects.toStringHelper(this).add("department", getDepartment())
.add("effectiveDate", DATE_FORMAT.print(readEffectiveDateAsDateTime()))
.add("description", getDescription()).add("managerId", getManagerId()).toString();
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof DepartmentHistory)) {
return false;
}
DepartmentHistory other = (DepartmentHistory) obj;
return Objects.equal(getDepartment(), other.getDepartment())
&& Objects.equal(getEffectiveDate(), other.getEffectiveDate());
}
@Override
public int hashCode() {
return Objects.hashCode(getDepartment(), getEffectiveDate());
}
}
Can I combine an @Embeddable and another field into a composite primary key using @Id property on the @Embedded and field. I don't want to make (GROUP_DEPT, DEPTID, EFFDT) as an @EmbeddedId because such a component type does not make sense and I don't want to create a class that does not mean anything in my domain just to use as a composite primary key. A component Department containing just (GROUP_DEPT, DEPTID) makes sense as a department. Thanks much.
