i am new in jpa and eclipselink
i have post this question on stack overflow ,
but the answer doesn't work for me. Because it suppose to create 3 tables , using @MapsId it create 5 tables.
here is my case :
I am new in eclipselink and trying to add extra columns in manyTomany association table.
so i decide to use two @OneToMany and @ManyToOne to replace @ManyToMany relationship.
i have tried the hibernate way in the test code below, but it does't work.
Is there anyone know how to build this in eclispelink?
Thanks
SideA:
@Entity
@Table(name = "SideA")
public class SideA {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
private List<ABAssociation> association = new ArrayList<ABAssociation>();
@OneToMany(fetch = FetchType.LAZY, mappedBy = "pk.sideA", cascade=CascadeType.ALL)
public List<ABAssociation> getAssociation() {
return this.association;
}
public void setAssociation(List<ABAssociation> association) {
this.association = association;
}
}
SideB:
@Entity
@Table(name = "SideB")
public class SideB {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
private List<ABAssociation> association = new ArrayList<ABAssociation>();
@OneToMany(fetch = FetchType.LAZY, mappedBy = "pk.sideB", cascade=CascadeType.ALL)
public List<ABAssociation> getAssociation() {
return this.association;
}
public void setAssociation(List<ABAssociation> association) {
this.association = association;
}
}
Associtation:
@Entity
@Table(name = "ABAssociation")
@AssociationOverrides({
@AssociationOverride(name = "pk.sideA",
joinColumns = @JoinColumn(name = "SIDEA_ID")),
@AssociationOverride(name = "pk.sideB",
joinColumns = @JoinColumn(name = "SIDEB_ID")) })
public class ABAssociation {
private ABAssociationPK pk = new ABAssociationPK();
@EmbeddedId
public ABAssociationPK getPk() {
return pk;
}
public void setPk(ABAssociationPK pk) {
this.pk = pk;
}
@Transient
public SideA getSideA() {
return getPk().getSideA();
}
public void setSideA(SideA sideA) {
getPk().setSideA(sideA);
}
@Transient
public SideB getSideB() {
return getPk().getSideB();
}
public void setSideB(SideB sideB) {
getPk().setSideB(sideB);
}
private String extracolumn;
}
ABAssociationPK:
@Embeddable
public class ABAssociationPK implements java.io.Serializable{
private static final long serialVersionUID = -3797694126054440157L;
private SideA sideA;
private SideB sideB;
public ABAssociationPK(){}
@ManyToOne
public SideA getSideA() {
return sideA;
}
public void setSideA(SideA sideA) {
this.sideA = sideA;
}
@ManyToOne
public SideB getSideB() {
return sideB;
}
public void setSideB(SideB sideB) {
this.sideB = sideB;
}
}
exception:
Exception Description: Predeployment of PersistenceUnit [testPU] failed. Internal Exception: Exception [EclipseLink-7298] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.ValidationException Exception Description: The mapping [sideA] from the embedded ID class [class com.fuhu.nabisync.resource.model.entity.ABAssociationPK] is an invalid mapping for this class. An embeddable class that is used with an embedded ID specification (attribute [pk] from the source [class com.fuhu.nabisync.resource.model.entity.ABAssociation]) can only contain basic mappings. Either remove the non basic mapping or change the embedded ID specification on the source to be embedded