01: /*
02: * @(#)WildcardType.java 1.5 04/06/07
03: *
04: * Copyright (c) 2004, Sun Microsystems, Inc.
05: * All rights reserved.
06: *
07: * Redistribution and use in source and binary forms, with or without
08: * modification, are permitted provided that the following conditions are met:
09: *
10: * * Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * * Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * * Neither the name of the Sun Microsystems, Inc. nor the names of
16: * its contributors may be used to endorse or promote products derived from
17: * this software without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
20: * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
22: * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
23: * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30: */
31:
32: package com.sun.mirror.type;
33:
34: import java.util.Collection;
35:
36: /**
37: * Represents a wildcard type argument.
38: * Examples include: <pre><tt>
39: * ?
40: * ? extends Number
41: * ? super T
42: * </tt></pre>
43: *
44: * <p> A wildcard may have its upper bound explicitly set by an
45: * <tt>extends</tt> clause, its lower bound explicitly set by a
46: * <tt>super</tt> clause, or neither (but not both).
47: *
48: * @author Joseph D. Darcy
49: * @author Scott Seligman
50: * @version 1.5 04/06/07
51: * @since 1.5
52: */
53:
54: public interface WildcardType extends TypeMirror {
55:
56: /**
57: * Returns the upper bounds of this wildcard.
58: * If no upper bound is explicitly declared, then
59: * an empty collection is returned.
60: *
61: * @return the upper bounds of this wildcard
62: */
63: Collection<ReferenceType> getUpperBounds();
64:
65: /**
66: * Returns the lower bounds of this wildcard.
67: * If no lower bound is explicitly declared, then
68: * an empty collection is returned.
69: *
70: * @return the lower bounds of this wildcard
71: */
72: Collection<ReferenceType> getLowerBounds();
73: }
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