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## javax.persistence
Annotation Type MapKeyJoinColumns

    @Target(value={METHOD,FIELD})
    @Retention(value=RUNTIME)
    public @interface MapKeyJoinColumns

Supports composite map keys that reference entities.

The `MapKeyJoinColumns` annotation groups `MapKeyJoinColumn` annotations. When the `MapKeyJoinColumns` annotation is used, both the `name` and the `referencedColumnName` elements must be specified in each of the grouped `MapKeyJoinColumn` annotations.

Since:
  Java Persistence 2.0
See Also:
  `MapKeyJoinColumn`

Required Element Summary
`MapKeyJoinColumn[]` | `value` (Required) The map key join columns that are used to map to the entity that is the map key.

Element Detail

### value

    public abstract MapKeyJoinColumn[] value

  (Required) The map key join columns that are used to map to the entity that is the map key.

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