spring - @JoinColumns を使用して、結合列ごとに @JoinColumn を指定する必要があります。

Question

追加の列を使用して多対多の関係を実装しようとしていますが、gettig 以下のエラーが発生します。以下のエラーが発生している理由と解決方法を誰かが説明できますか?

Internal Exception: Exception [EclipseLink-7220] (Eclipse Persistence Services - 2.4.1.v20121003-ad44345): org.eclipse.persistence.exceptions.ValidationException Exception Description: The @JoinColumns on the annotated element [field extension] from the entity class [class com.polycom.cloudAxis.model.ip.ProfileExtensionMapping] is incomplete. When the source entity class uses a composite primary key, a @JoinColumn must be specified for each join column using the @JoinColumns. Both the name and the referencedColumnName elements must be specified in each such @JoinColumn. at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.createPredeployFailedPersistenceException(EntityManagerSetupImpl.java:1541) at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1532) at org.eclipse.persistence.jpa.PersistenceProvider.createContainerEntityManagerFactory(PersistenceProvider.java:235)

プロフィール

@Entity
@Table(name = "profile")
public class Profile extends AbstractPersistable<Long> {

private static final long serialVersionUID = 1L;

@Column(name = "instanceType")
private InstanceType instanceType;

@Column(name = "isDefault")
private boolean isDefault;

@Column(name = "profileType")
private ProfileType profileType;

@OneToMany(mappedBy = "profile")
private Set<ProfileExtensionMapping> profileExtensionMappings;

@Id
@Column(name = "profile_id")
private Long profile_id;

}

拡大：

@Table(name = "extension")
@Entity
public class Extension extends AbstractPersistable<Long> {

private static final long serialVersionUID = 1L;

@Lob
@Basic(optional = false)
@Column(name = "json")
private byte[] json;

@Id
@Column(name = "extension_id")
private Long extension_id;

public Long getExtension_id() {
    return extension_id;
}

public void setExtension_id(Long extension_id) {
    this.extension_id = extension_id;
}

@OneToMany(mappedBy = "extension")
private Set<ProfileExtensionMapping> profileExtensionMappings;

}

ProfileExtensionMapping:

@Entity
@Table(name = "profile_extension_mapping")
@IdClass(ProfileExtensionPK.class)
public class ProfileExtensionMapping extends AbstractPersistable<Long> {

private static final long serialVersionUID = 1L;

@Id
@Column(name = "profile_id", insertable = false, updatable = false)
private Long profile_id;

@Id
@Column(name = "extension_id", insertable = false, updatable = false)
private Long extension_id;

@ManyToOne
@JoinColumns({ @JoinColumn(name = "profile_id", referencedColumnName = "profile_id",    nullable = false) })
private Profile profile;

@ManyToOne
@JoinColumns({ @JoinColumn(name = "extension_id", referencedColumnName = "extension_id", nullable = false) })
private Extension extension;

@Column(name = "type")
private ExtensionType extensionType;

@Column(name = "name")
private ExtensionName extensionName;
}