javax.persistence: public class: MapKey

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

javax.persistence.MapKey

Is used to specify the map key for associations of type Map. If a persistent field or property other than the primary key is used as a map key then it is expected to have a uniqueness constraint associated with it.

author: Emmanuel - Bernard

Method from javax.persistence.MapKey Summary:
name

Method from javax.persistence.MapKey Detail:
String name() { } The name of the persistent field or property of the associated entity that is used as the map key. If the name element is not specified, the primary key of the associated entity is used as the map key. If the primary key is a composite primary key and is mapped as IdClass, an instance of the primary key class is used as the key.

Method from javax.persistence.MapKey Detail:

 String name() {

}

The name of the persistent field or property of the associated entity that is used as the map key. If the name element is not specified, the primary key of the associated entity is used as the map key. If the primary key is a composite primary key and is mapped as IdClass, an instance of the primary key class is used as the key.