01: /*
02: * Copyright 2004 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 com.sun.mirror.type;
27:
28: import java.util.Collection;
29:
30: /**
31: * Represents a wildcard type argument.
32: * Examples include: <pre><tt>
33: * ?
34: * ? extends Number
35: * ? super T
36: * </tt></pre>
37: *
38: * <p> A wildcard may have its upper bound explicitly set by an
39: * <tt>extends</tt> clause, its lower bound explicitly set by a
40: * <tt>super</tt> clause, or neither (but not both).
41: *
42: * @author Joseph D. Darcy
43: * @author Scott Seligman
44: * @version 1.12 07/05/05
45: * @since 1.5
46: */
47:
48: public interface WildcardType extends TypeMirror {
49:
50: /**
51: * Returns the upper bounds of this wildcard.
52: * If no upper bound is explicitly declared, then
53: * an empty collection is returned.
54: *
55: * @return the upper bounds of this wildcard
56: */
57: Collection<ReferenceType> getUpperBounds();
58:
59: /**
60: * Returns the lower bounds of this wildcard.
61: * If no lower bound is explicitly declared, then
62: * an empty collection is returned.
63: *
64: * @return the lower bounds of this wildcard
65: */
66: Collection<ReferenceType> getLowerBounds();
67: }
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