| Defines a many-valued association with many-to-many multiplicity.
If the Collection is defined using generics to specify the element
type, the associated target entity class does not need to be
specified; otherwise it must be specified.
Every many-to-many association has two sides, the owning
side and the non-owning, or inverse, side. The join table is
specified on the owning side. If the association is bidirectional,
either side may be designated as the owning side.
The same annotation elements for the {@link OneToMany}
annotation apply to the ManyToMany annotation.
Example 1:
In Customer class:
@ManyToMany
@JoinTable(name="CUST_PHONES")
public Set getPhones() { return phones; }
In PhoneNumber class:
@ManyToMany(mappedBy="phones")
public Set getCustomers() { return customers; }
Example 2:
In Customer class:
@ManyToMany(targetEntity=com.acme.PhoneNumber.class)
public Set getPhones() { return phones; }
In PhoneNumber class:
@ManyToMany(targetEntity=com.acme.Customer.class, mappedBy="phones")
public Set getCustomers() { return customers; }
Example 3:
In Customer class:
@ManyToMany
@JoinTable(name="CUST_PHONE",
joinColumns=
@JoinColumn(name="CUST_ID", referencedColumnName="ID"),
inverseJoinColumns=
@JoinColumn(name="PHONE_ID", referencedColumnName="ID")
)
public Set getPhones() { return phones; }
In PhoneNumberClass:
@ManyToMany(mappedBy="phones")
public Set getCustomers() { return customers; }
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