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@Target(value={METHOD,FIELD}) @Retention(value=RUNTIME) public @interface 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.
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String |
name
The name of the persistent field or property of the associated entity that is used as the map key. |
public abstract String name
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