| Defines a many-valued association with one-to-many multiplicity.
If the collection is defined using generics to specify the
element type, the associated target entity type need not be
specified; otherwise the target entity class must be specified.
Example 1: One-to-Many association using generics
In Customer class:
@OneToMany(cascade=ALL, mappedBy="customer")
public Set getOrders() { return orders; }
In Order class:
@ManyToOne
@JoinColumn(name="CUST_ID", nullable=false)
public Customer getCustomer() { return customer; }
Example 2: One-to-Many association without using generics
In Customer class:
@OneToMany(targetEntity=com.acme.Order.class, cascade=ALL,
mappedBy="customer")
public Set getOrders() { return orders; }
In Order class:
@ManyToOne
@JoinColumn(name="CUST_ID", nullable=false)
public Customer getCustomer() { return customer; }
since:
Java Persistence 1.0 |