Creating EJB 3.0 Entity Relationships - EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g - page 203

Annotation Description Annotation Elements

@ManyToOne Defines a single-valued

association to another entity
class that has many-to-one
multiplicity.

targetEntity (optional): This is
the entity class that is the target of the
association.
cascade (optional): These are the
operations that must be cascaded to the
target of the association. By default no
operations are cascaded.
fetch (optional): The fetch strategy. By
default, the value is EAGER .
optional (optional): Specifies whether
the association is optional. By default, the
value is true.

@ManyToMany Defines a many-valued
association with many-to-
many multiplicity.

targetEntity (optional): This is
the entity class that is the target of the
association. If the collection is defined
using generics the target entity is not
required to be specified.
cascade (optional): These are the
operations that must be cascaded to the
target entity. By default, no operations
are cascaded.
fetch (optional): This is the fetch
strategy. By default, it is LAZY .
mappedBy (optional): Specified on the
non-owning side, the field that owns
the relationship. Required unless the
relationship is unidirectional.