01 /*
02 * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved.
03 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04 *
05 * This code is free software; you can redistribute it and/or modify it
06 * under the terms of the GNU General Public License version 2 only, as
07 * published by the Free Software Foundation. Sun designates this
08 * particular file as subject to the "Classpath" exception as provided
09 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package javax.lang.model.type;
27
28 /**
29 * Represents a wildcard type argument.
30 * Examples include: <pre><tt>
31 * ?
32 * ? extends Number
33 * ? super T
34 * </tt></pre>
35 *
36 * <p> A wildcard may have its upper bound explicitly set by an
37 * {@code extends} clause, its lower bound explicitly set by a
38 * {@code super} clause, or neither (but not both).
39 *
40 * @author Joseph D. Darcy
41 * @author Scott Seligman
42 * @author Peter von der Ahé
43 * @version 1.9 07/05/05
44 * @since 1.6
45 */
46 public interface WildcardType extends TypeMirror {
47
48 /**
49 * Returns the upper bound of this wildcard.
50 * If no upper bound is explicitly declared,
51 * {@code null} is returned.
52 *
53 * @return the upper bound of this wildcard
54 */
55 TypeMirror getExtendsBound();
56
57 /**
58 * Returns the lower bound of this wildcard.
59 * If no lower bound is explicitly declared,
60 * {@code null} is returned.
61 *
62 * @return the lower bound of this wildcard
63 */
64 TypeMirror getSuperBound();
65 }
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