WildcardType


1   /*
2    * @(#)WildcardType.java    1.5 04/06/07
3    *
4    * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL.  Use is subject to license terms.
6    */
7   
8   package com.sun.mirror.type;
9   
10  
11  import java.util.Collection  ;
12  
13  
14  /**
15   * Represents a wildcard type argument.
16   * Examples include:    <pre><tt>
17   *   ?
18   *   ? extends Number
19   *   ? super T
20   * </tt></pre>
21   *
22   * <p> A wildcard may have its upper bound explicitly set by an
23   * <tt>extends</tt> clause, its lower bound explicitly set by a
24   * <tt>super</tt> clause, or neither (but not both).
25   *
26   * @author Joseph D. Darcy
27   * @author Scott Seligman
28   * @version 1.5 04/06/07
29   * @since 1.5
30   */
31  
32  public interface WildcardType extends TypeMirror {
33  
34      /**
35       * Returns the upper bounds of this wildcard.
36       * If no upper bound is explicitly declared, then
37       * an empty collection is returned.
38       *
39       * @return the upper bounds of this wildcard
40       */
41      Collection  <ReferenceType> getUpperBounds();
42  
43      /**
44       * Returns the lower bounds of this wildcard.
45       * If no lower bound is explicitly declared, then
46       * an empty collection is returned.
47       *
48       * @return the lower bounds of this wildcard
49       */
50      Collection  <ReferenceType> getLowerBounds();
51  }
52

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