1 /* 2 * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Sun designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * 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 29 import java.util.Collection; 30 31 32 /** 33 * Represents a wildcard type argument. 34 * Examples include: <pre><tt> 35 * ? 36 * ? extends Number 37 * ? super T 38 * </tt></pre> 39 * 40 * <p> A wildcard may have its upper bound explicitly set by an 41 * <tt>extends</tt> clause, its lower bound explicitly set by a 42 * <tt>super</tt> clause, or neither (but not both). 43 * 44 * @author Joseph D. Darcy 45 * @author Scott Seligman 46 * @since 1.5 47 */ 48 49 public interface WildcardType extends TypeMirror { 50 51 /** 52 * Returns the upper bounds of this wildcard. 53 * If no upper bound is explicitly declared, then 54 * an empty collection is returned. 55 * 56 * @return the upper bounds of this wildcard 57 */ 58 Collection<ReferenceType> getUpperBounds(); 59 60 /** 61 * Returns the lower bounds of this wildcard. 62 * If no lower bound is explicitly declared, then 63 * an empty collection is returned. 64 * 65 * @return the lower bounds of this wildcard 66 */ 67 Collection<ReferenceType> getLowerBounds(); 68 }