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>Bindable</code> represent object or attribute types
21 * that can be bound into a {@link javax.persistence.criteria.Path Path}.
22 *
23 * @param <T> The type of the represented object or attribute
24 *
25 * @since 2.0
26 *
27 */
28 public interface Bindable<T> {
29
30 public static enum BindableType {
31
32 /** Single-valued attribute type */
33 SINGULAR_ATTRIBUTE,
34
35 /** Multi-valued attribute type */
36 PLURAL_ATTRIBUTE,
37
38 /** Entity type */
39 ENTITY_TYPE
40 }
41
42 /**
43 * Return the bindable type of the represented object.
44 * @return bindable type
45 */
46 BindableType getBindableType();
47
48 /**
49 * Return the Java type of the represented object.
50 * If the bindable type of the object is <code>PLURAL_ATTRIBUTE</code>,
51 * the Java element type is returned. If the bindable type is
52 * <code>SINGULAR_ATTRIBUTE</code> or <code>ENTITY_TYPE</code>,
53 * the Java type of the
54 * represented entity or attribute is returned.
55 * @return Java type
56 */
57 Class<T> getBindableJavaType();
58 }
59