javax.persistence: public class: ManyToMany

javax.persistence
public class: ManyToMany [javadoc | source]

javax.persistence.ManyToMany

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 OneToMany annotation apply to the ManyToMany annotation.

author: Emmanuel - Bernard

Method from javax.persistence.ManyToMany Summary:
cascade, fetch, mappedBy, targetEntity

Method from javax.persistence.ManyToMany Detail:
CascadeType[] cascade() { } The operations that must be cascaded to the target of the association. Defaults to no operations being cascaded.
FetchType fetch() { } Whether the association should be lazily loaded or must be eagerly fetched. The EAGER strategy is a requirement on the persistenceprovider runtime that the associatedentities must be eagerly fetched. The LAZY strategy is a hint to the persistence provider runtime.
String mappedBy() { } The field that owns the relationship. Required unless the relationship is unidirectional.
Class targetEntity() { } The entity class that is the target of the association. Optional only if the collection property is defined using Java generics. Must be specified otherwise. Defaults to the parameterized type of the collection when defined using generics.

Method from javax.persistence.ManyToMany Detail:

 CascadeType[] cascade() {

}

The operations that must be cascaded to the target of the association. Defaults to no operations being cascaded.

 FetchType fetch() {

}

Whether the association should be lazily loaded or must be eagerly fetched. The EAGER strategy is a requirement on the persistenceprovider runtime that the associatedentities must be eagerly fetched. The LAZY strategy is a hint to the persistence provider runtime.

 String mappedBy() {

}

The field that owns the relationship. Required unless the relationship is unidirectional.

 Class targetEntity() {

}

The entity class that is the target of the association. Optional only if the collection property is defined using Java generics. Must be specified otherwise. Defaults to the parameterized type of the collection when defined using generics.