Inheritance


1   /*
2    * The contents of this file are subject to the terms 
3    * of the Common Development and Distribution License 
4    * (the License).  You may not use this file except in
5    * compliance with the License.
6    * 
7    * You can obtain a copy of the license at 
8    * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9    * glassfish/bootstrap/legal/CDDLv1.0.txt.
10   * See the License for the specific language governing 
11   * permissions and limitations under the License.
12   * 
13   * When distributing Covered Code, include this CDDL 
14   * Header Notice in each file and include the License file 
15   * at glassfish/bootstrap/legal/CDDLv1.0.txt.  
16   * If applicable, add the following below the CDDL Header, 
17   * with the fields enclosed by brackets [] replaced by
18   * you own identifying information: 
19   * "Portions Copyrighted [year] [name of copyright owner]"
20   * 
21   * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22   */
23  package javax.persistence;
24  
25  import java.lang.annotation.Target  ;
26  import java.lang.annotation.Retention  ;
27  import static java.lang.annotation.ElementType.TYPE  ;
28  import static java.lang.annotation.RetentionPolicy.RUNTIME  ;
29  import static javax.persistence.InheritanceType.SINGLE_TABLE;
30  
31  /**
32   * Defines the inheritance strategy to be used for an entity class 
33   * hierarchy. It is specified on the entity class that is the root 
34   * of the entity class hierarchy.
35   *
36   * <pre>
37   *
38   *   Example:
39   *
40   *   &#064;Entity
41   *   &#064;Inheritance(strategy=JOINED)
42   *   public class Customer { ... }
43   *
44   *   &#064;Entity
45   *   public class ValuedCustomer extends Customer { ... }
46   * </pre>
47   *
48   * @since Java Persistence 1.0
49   */
50  @Target  ({TYPE})
51  @Retention  (RUNTIME)
52  
53  public @interface Inheritance {
54  
55      /** The strategy to be used */
56      InheritanceType strategy() default SINGLE_TABLE;
57  }
58
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