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Hibernate developmental JSR 317 (Java Persistence API 2.0) contracts. Used to allow incremental implementation of features on the way to full JPA 2.0 support.

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// $Id: UniqueConstraint.java 16130 2009-03-10 14:28:07Z hardy.ferentschik $
// EJB3 Specification Copyright 2004-2009 Sun Microsystems, Inc.
package javax.persistence;

import java.lang.annotation.Retention;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Target;

/**
 * This annotation is used to specify that a unique constraint is to be included in the generated DDL
 * for a primary or secondary table
 *
 * @author Emmanuel Bernard
 */
@Target({}) @Retention(RUNTIME)
public @interface UniqueConstraint {
	/**
	 * An array of the column names that make up the constraint
	 */
	String[] columnNames();
}