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33 | PointedEar | 1 | //$Id: $ |
2 | package org.hibernate.annotations; |
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3 | |||
4 | import java.lang.annotation.Target; |
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5 | import java.lang.annotation.Retention; |
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6 | import static java.lang.annotation.RetentionPolicy.RUNTIME; |
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7 | import static java.lang.annotation.ElementType.METHOD; |
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8 | import static java.lang.annotation.ElementType.FIELD; |
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9 | import javax.persistence.Column; |
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10 | |||
11 | /** |
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12 | * Define the map key columns as an explicit column holding the map key |
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13 | * This is completly different from {@link javax.persistence.MapKey} which use an existing column |
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14 | * This annotation and {@link javax.persistence.MapKey} are mutually exclusive |
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15 | * |
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16 | * @author Emmanuel Bernard |
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17 | */ |
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18 | @Target({METHOD, FIELD}) |
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19 | @Retention(RUNTIME) |
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20 | public @interface MapKey { |
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21 | Column[] columns() default {}; |
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22 | /** |
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23 | * Represent the key class in a Map |
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24 | * Only useful if the collection does not use generics |
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25 | */ |
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26 | Class targetElement() default void.class; |
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27 | |||
28 | /** |
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29 | * The optional map key type. Guessed if default |
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30 | */ |
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31 | Type type() default @Type(type = ""); |
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32 | } |