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JPA Doc
3

javax.persistence.SecondaryTable

=@PrimaryKeyJoinColumn(name="CUST_ID")) public class Customer { ... } Example 2: Single secondary table ... ="CUST_DETAIL", pkJoinColumns={ @PrimaryKeyJoinColumn(name="CUST_ID
JPA Doc
3

javax.persistence.SecondaryTables

_DETAIL", pkJoinColumns=@PrimaryKeyJoinColumn(name="EMPL_ID")), @SecondaryTable(name="EMP_HIST", pkJoinColumns=@PrimaryKeyJoinColumn(name="EMPLOYEE_ID")) }) public class
JPA Doc
3

javax.persistence.Transient

{ @Id int id; @Transient User currentUser; ... } Since: JPA 1.0 This annotation is a marker annotation (with no elements).
JDO Doc
3

jdoCopyKeyFieldsFromObjectId(fm, oid)

field in the ObjectId. For example, an ObjectId class that has three key fields (int id, String ... (ObjectIdFieldConsumer fm, Object objectId) { EmployeeKey oid = (EmployeeKey)objectId; fm.storeIntField (0, oid.id
JDO Doc
3

jdoCopyKeyFieldsToObjectId(fm, oid)

field in the ObjectId. For example, an ObjectId class that has three key fields (int id, String name ... (ObjectIdFieldSupplier fm, Object objectId) { EmployeeKey oid = (EmployeeKey)objectId; oid.id = fm.fetchIntField (0
JDO Doc
3

jdoNewObjectIdInstance(o)

Method javax.jdo.spi.PersistenceCapable Object jdoNewObjectIdInstance(   Object o ) Create a new instance of the class used for JDO identity, using the key constructor of the object id class ... . If the key is the wrong class for the object id class, null is returned. For classes that use single
JDO Doc
3

newObjectIdInstance(pcClass, key)

Method javax.jdo.PersistenceManager Object newObjectIdInstance(   Class pcClass,   Object key ) This method returns an object id instance corresponding to the pcClass and key arguments. Parameters ... () on the object id instance. Returns: an instance of the object identity class Since: JDO 1.0
JDO Doc
3

toString()

Method javax.jdo.identity.ObjectIdentity String toString() Return the String form of the object id. The class of the object id is written as the first part of the result so that the class can be reconstructed later. Then the toString of the key instance is appended. During construction
Forum
3

Broken @ManyToOne reference

: @MappedSuperclass public abstract class A { @Id @ManyToOne(fetch = FetchType.EAGER, cascade=CascadeType.ALL, optional=false) private B b; @Id @Column(length = 36) private String stringId; } @MappedSuperclass public abstract class B { @Id private String name; } Both objects store
Forum
3

Find the error...JPA ENTITY HIBERNATE

.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.JoinTable; import ... Serializable { private static final long serialVersionUID = 1L; // @GeneratedValue @Id @Column(name = "id") @GeneratedValue(strategy = GenerationType.IDENTITY) private int id; @Column(name = "username