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. }