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The Java Persistence API (JPA) : a standard interface-based Java model abstraction of persistence, developed by the JCP.

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/*
 * Copyright (c) 2013 Oracle, Inc. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.  The Eclipse Public License is available
 * at http://www.eclipse.org/legal/epl-v10.html and the Eclipse Distribution License
 * is available at http://www.eclipse.org/org/documents/edl-v10.php.
 */
package javax.persistence;

/**
 * Used to control the application of a constraint.
 *
 * @since JPA 2.1
 */
public enum ConstraintMode {
	/**
	 * Apply the constraint.
	 */
	CONSTRAINT,
	/**
	 * Do not apply the constraint.
	 */
	NO_CONSTRAINT,
	/**
	 * Use the provider-defined default behavior.
	 */
	PROVIDER_DEFAULT
}