1 /* 2 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package javax.lang.model.type; 27 28 29 /** 30 * Represents a wildcard type argument. 31 * Examples include: <pre><code> 32 * ? 33 * ? extends Number 34 * ? super T 35 * </code></pre> 36 * 37 * <p> A wildcard may have its upper bound explicitly set by an 38 * {@code extends} clause, its lower bound explicitly set by a 39 * {@code super} clause, or neither (but not both). 40 * 41 * @author Joseph D. Darcy 42 * @author Scott Seligman 43 * @author Peter von der Ahé 44 * @since 1.6 45 */ 46 public interface WildcardType extends TypeMirror { 47 48 /** 49 * Returns the upper bound of this wildcard. 50 * If no upper bound is explicitly declared, 51 * {@code null} is returned. 52 * 53 * @return the upper bound of this wildcard 54 */ 55 TypeMirror getExtendsBound(); 56 57 /** 58 * Returns the lower bound of this wildcard. 59 * If no lower bound is explicitly declared, 60 * {@code null} is returned. 61 * 62 * @return the lower bound of this wildcard 63 */ 64 TypeMirror getSuperBound(); 65 }