1 /*
2 * Copyright (c) 2008, 2019 Oracle and/or its affiliates. All rights reserved.
3 *
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v. 2.0 which is available at
6 * http://www.eclipse.org/legal/epl-2.0,
7 * or the Eclipse Distribution License v. 1.0 which is available at
8 * http://www.eclipse.org/org/documents/edl-v10.php.
9 *
10 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
11 */
12
13 // Contributors:
14 // Linda DeMichiel - 2.1
15 // Linda DeMichiel - 2.0
16
17 package javax.persistence.metamodel;
18
19 /**
20 * Instances of the type <code>PluralAttribute</code> represent
21 * persistent collection-valued attributes.
22 *
23 * @param <X> The type the represented collection belongs to
24 * @param <C> The type of the represented collection
25 * @param <E> The element type of the represented collection
26 *
27 * @since 2.0
28 */
29 public interface PluralAttribute<X, C, E>
30 extends Attribute<X, C>, Bindable<E> {
31
32 public static enum CollectionType {
33
34 /** Collection-valued attribute */
35 COLLECTION,
36
37 /** Set-valued attribute */
38 SET,
39
40 /** List-valued attribute */
41 LIST,
42
43 /** Map-valued attribute */
44 MAP
45 }
46
47 /**
48 * Return the collection type.
49 * @return collection type
50 */
51 CollectionType getCollectionType();
52
53 /**
54 * Return the type representing the element type of the
55 * collection.
56 * @return element type
57 */
58 Type<E> getElementType();
59 }
60