src/javax/persistence/Embeddable.java

/*
 * Copyright (c) 2008, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Linda DeMichiel - Java Persistence 2.1
//     Linda DeMichiel - Java Persistence 2.0

package javax.persistence;

import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import java.lang.annotation.Documented;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * Specifies a class whose instances are stored as an intrinsic 
 * part of an owning entity and share the identity of the entity. 
 * Each of the persistent properties or fields of the embedded 
 * object is mapped to the database table for the entity. 
 *
 * <p> Note that the {@link Transient} annotation may be used to 
 * designate the non-persistent state of an embeddable class.
 *
 * <pre>
 *
 *    Example 1:
 *
 *    &#064;Embeddable public class EmploymentPeriod { 
 *       &#064;Temporal(DATE) java.util.Date startDate;
 *       &#064;Temporal(DATE) java.util.Date endDate;
 *      ... 
 *    }
 *
 *    Example 2:
 *
 *    &#064;Embeddable public class PhoneNumber {
 *        protected String areaCode;
 *        protected String localNumber;
 *        &#064;ManyToOne PhoneServiceProvider provider;
 *        ...
 *     }
 *
 *    &#064;Entity public class PhoneServiceProvider {
 *        &#064;Id protected String name;
 *         ...
 *     }
 *
 *    Example 3:
 *
 *    &#064;Embeddable public class Address {
 *       protected String street;
 *       protected String city;
 *       protected String state;
 *       &#064;Embedded protected Zipcode zipcode;
 *    }
 *
 *    &#064;Embeddable public class Zipcode {
 *       protected String zip;
 *       protected String plusFour;
 *     }


 * </pre>
 *
 * @since Java Persistence 1.0
 */
@Documented
@Target({TYPE}) 
@Retention(RUNTIME)
public @interface Embeddable {
}