File Doc Category Size Date Package
ManyToOne.java API Doc Glassfish v2 API 3969 Fri May 04 22:34:06 BST 2007 javax.persistence

ManyToOne

public class ManyToOne

This annotation defines a single-valued association to another entity class that has many-to-one multiplicity. It is not normally necessary to specify the target entity explicitly since it can usually be inferred from the type of the object being referenced.


Example:

@ManyToOne(optional=false)
@JoinColumn(name="CUST_ID", nullable=false, updatable=false)
public Customer getCustomer() { return customer; }

since: Java Persistence 1.0

Fields Summary
Constructors Summary
Methods Summary
javax.persistence.CascadeType[] cascade()
(Optional) The operations that must be cascaded to the target of the association.
By default no operations are cascaded.
javax.persistence.FetchType fetch()
(Optional) Whether the association should be lazily loaded or must be eagerly fetched. The {@link FetchType#EAGER EAGER} strategy is a requirement on the persistence provider runtime that the associated entity must be eagerly fetched. The {@link FetchType#LAZY LAZY} strategy is a hint to the persistence provider runtime.
boolean optional()
(Optional) Whether the association is optional. If set to false then a non-null relationship must always exist.
java.lang.Class targetEntity()
(Optional) The entity class that is the target of the association.
Defaults to the type of the field or property that stores the association.