Hello. I don' undestand how is it possible to do.
Please, see my code:
@Entity
@Table(name = "Person", schema = SCHEMA)
public class Person {
@Id
@GeneratedValue
@Column(name = "id")
private int id;
private String medialogyUid;
private String firstName;
private String lastName;
private String patronymic;
private String biography;
}
@Entity
@IdClass(Convocation.PK.class)
@Table(name = "Convocation", schema = SCHEMA)
public class Convocation {
@Id
private int number;
@Id
@ManyToOne(fetch=FetchType.EAGER, cascade={CascadeType.MERGE,
CascadeType.REFRESH, CascadeType.PERSIST})
private Institution institution;
private Date beginDate;
private Date endDate;
public Convocation(){
}
public Convocation(Institution inst, int number, Date beginDate, Date
endDate){
this.institution = inst;
this.number = number;
this.beginDate = beginDate;
this.endDate = endDate;
}
public static final class PK implements Serializable {
public int number;
public int institution;
public PK(){
}
/[EMAIL PROTECTED] number is convocation,number
* @param institution is convocation.institution.id
* */
public PK(int number, int institution){
this.number = number;
this.institution = institution;
}
@Override
public boolean equals(Object o) {
if (!(o instanceof PK))
return false;
PK oPK = (PK)o;
return this.number == oPK.number && this.institution
== oPK.institution;
}
@Override
public int hashCode() {
return ((number == 0) ? 0 : new
Integer(number).hashCode()) ^
((institution == 0) ? 0 : new Integer(institution).hashCode());
}
}
//And finally the last class:
@Entity
@IdClass(DeputyMandate.PK.class)
@Table(name = "DeputyMandate", schema = SCHEMA)
public class DeputyMandate {
@Id
@ManyToOne(fetch=FetchType.EAGER, cascade={CascadeType.MERGE,
CascadeType.REFRESH, CascadeType.PERSIST})
private Person person;
@Id
@ManyToOne(fetch=FetchType.EAGER, cascade={CascadeType.MERGE,
CascadeType.REFRESH, CascadeType.PERSIST})
private Convocation convocation;
private Date dateIn;
private Date dateOut;
public static final class PK implements Serializable {
//don't know what to use @Embeddable or what?
}
}
I want DeputyMandate to use composite key. This composite key is based on
Person with simple key (int id) and Convocation PK.
Please, tell me how can I make composite key DeputyMandate.PK using simple
key from Person and composite key from Convocation.
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