4 | getId(type) ) Return the attribute that corresponds to the id attribute of the entity or mapped superclass. Parameters: type - the type of the represented id attribute Returns: id attribute Throws: IllegalArgumentException - if id attribute of the given type is not present in the identifiable type or if the identifiable type has an id class Since: JPA 2.0 |
4 | javax.persistence.AssociationOverride=@JoinColumn(name="ADDR_ID")) // address field mapping overridden to ADDR_ID foreign key ... { @Id int id; @AssociationOverride( name="phoneNumbers", joinTable ... ; } @Entity public class PhoneNumber { @Id int number; @ManyToMany |
4 | javax.persistence.PersistenceUnitUtil entity) Return the id of the entity. Return the id of the entity. A generated id is not guaranteed ... yet have an id. Parameters: entity - entity instance Returns: id of the entity Throws |
4 | javax.persistence.ColumnResult( "SELECT o.id AS order_id, " + "o.quantity AS order_quantity, " + "o.item ... " + "WHERE (order_quantity > 25) AND (order_item = i.id)", "OrderResults ... .class, fields={ @FieldResult(name="id", column="order_id"), @FieldResult |
4 | javax.persistence.AssociationOverrides: @MappedSuperclass public class Employee { @Id protected Integer id; @Version ... Locker locker; public Integer getId() { ... } public void setId(Integer id ... ( name="address", joinColumns=@JoinColumn("ADDR_ID |
4 | javax.persistence.FieldResult.createNativeQuery( "SELECT o.id AS order_id, " + "o.quantity AS order_quantity ... > 25) AND (order_item = i.id)", "OrderResults"); @SqlResultSetMapping(name="OrderResults ... ={ @FieldResult(name="id", column="order_id"), @FieldResult(name="quantity", column |
3 | javax.persistence.MappedSuperclass { @Id protected Integer empId; @Version protected Integer version; @ManyToOne ... () { ... } public void setEmpId(Integer id) { ... } public Address getAddress ... (name="ADDR_ID")) public class PartTimeEmployee extends Employee { // Inherited empId |
3 | hasSingleIdAttribute()Method javax.persistence.metamodel.IdentifiableType boolean hasSingleIdAttribute() Whether the identifiable type has a single id attribute. Returns true for a simple id or embedded id; returns false for an idclass. Returns: boolean indicating whether the identifiable type has a single id attribute Since: JPA 2.0 |
3 | javax.persistence.JoinTable", joinColumns= @JoinColumn(name="CUST_ID", referencedColumnName="ID"), inverseJoinColumns= @JoinColumn(name="PHONE_ID", referencedColumnName="ID") ) Since: JPA 1.0 |
3 | getIdentifier(entity)Method javax.persistence.PersistenceUnitUtil Object getIdentifier( Object entity ) Return the id of the entity. A generated id is not guaranteed to be available until after the database insert has occurred. Returns null if the entity does not yet have an id. Parameters: entity - entity instance |
