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//$Id: $
package org.hibernate.annotations;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import javax.persistence.JoinColumn;
/**
* Define the map key columns as an explicit column holding the map key
* This is completly different from {@link javax.persistence.MapKey} which use an existing column
* This annotation and {@link javax.persistence.MapKey} are mutually exclusive
*
* @author Emmanuel Bernard
*/
@
Target({ElementType.
METHOD,
ElementType.
FIELD})
@
Retention(RetentionPolicy.
RUNTIME)
public @
interface MapKeyManyToMany
{
JoinColumn
[] joinColumns
() default {};
/**
* Represent the key class in a Map
* Only useful if the collection does not use generics
*/
Class targetEntity
() default void.
class;
}